CN213782887U - Energy storage converter with automatic protection function - Google Patents
Energy storage converter with automatic protection function Download PDFInfo
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- CN213782887U CN213782887U CN202022066188.3U CN202022066188U CN213782887U CN 213782887 U CN213782887 U CN 213782887U CN 202022066188 U CN202022066188 U CN 202022066188U CN 213782887 U CN213782887 U CN 213782887U
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- bidirectional switch
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- converter
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Abstract
The utility model is suitable for a converter technical field provides an energy storage converter with automatic protect function, include: the system comprises an AC/DC converter and a battery breaker switch cabinet; the battery breaker switch cabinet comprises a battery breaker switch cabinet control circuit connected with the first bidirectional switch and a second bidirectional switch connected with the battery breaker switch cabinet control circuit; the second bidirectional switch is a bidirectional switch with an undervoltage coil or a bidirectional switch which needs to meet a preset driving voltage; the alternating current side of the alternating current/direct current converter is connected with a power grid, and the direct current side of the alternating current/direct current converter is connected with a second bidirectional switch of the battery breaker switch cabinet; and the battery breaker switch cabinet control circuit is connected with the battery through the first bidirectional switch. The utility model discloses can avoid the battery or have the inside device damage of automatic protect function's energy storage converter.
Description
Technical Field
The utility model belongs to the technical field of the converter, especially, relate to an energy storage converter with automatic protect function.
Background
In a typical energy storage system, an energy storage converter is connected to a battery through a bidirectional switch, as shown in fig. 1. Under the normal condition, when the battery is under-voltage, the control circuit controls to disconnect the two-way switch, cuts off the connection between the battery and the energy storage converter and protects the battery.
Two problems exist in the existing energy storage system: 1. when the battery under-voltage point of the control circuit is set unreasonably or the software logic is in a problem, the control circuit cannot timely control the disconnection of the bidirectional switch QF2 when the battery voltage is lower than the discharge cut-off voltage, so that the battery can be discharged continuously to cause over-discharge of the battery, and the battery is damaged. 2. The control circuit of the energy storage converter gets electricity from the battery, after the two-way switch QF1 disconnection of battery, the control circuit of energy storage converter will not have electricity, if the two-way switch QF2 of energy storage converter is closed by people, just can't control the disconnection of two-way switch QF2 through the control circuit, the two-way switch of closed battery in this time, will lead to the heavy current in the twinkling of an eye to pass through the bus capacitance of energy storage converter from the battery through two-way switch, cause the damage of energy storage converter or the inside device of battery very easily.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides an energy storage converter with automatic protect function aims at causing the problem that battery or energy storage converter inner part device damaged easily among the solution prior art.
The embodiment of the utility model provides an energy storage converter with automatic protect function, include:
an AC/DC converter, and a battery breaker switchgear;
the battery breaker switch cabinet comprises a battery breaker switch cabinet control circuit and a second bidirectional switch, wherein one end of the battery breaker switch cabinet control circuit is connected to a connecting line between the first bidirectional switch and the second bidirectional switch in a signal mode, and the other end of the battery breaker switch cabinet control circuit is connected to the second bidirectional switch in a driving mode;
the second bidirectional switch is a bidirectional switch with an undervoltage coil or a bidirectional switch which needs to meet a preset driving voltage;
the alternating current side of the alternating current/direct current converter is connected with a power grid, and the direct current side of the alternating current/direct current converter is connected with a second bidirectional switch of the battery breaker switch cabinet;
one end of the battery breaker switch cabinet control circuit is in signal connection with the battery through the first bidirectional switch.
Further, the battery circuit breaker switch cabinet further comprises a fuse, and the fuse is connected to a connection line between the first bidirectional switch and the second bidirectional switch.
Furthermore, the bidirectional switch with the undervoltage coil is a load switch with the undervoltage coil or a circuit breaker.
Further, the bidirectional switch required to satisfy the preset driving voltage is any one of a contactor, a relay, an insulated gate bipolar transistor and a metal-oxide semiconductor field effect transistor required to satisfy the preset driving voltage.
Furthermore, the control circuit of the battery breaker switch cabinet comprises a battery voltage detection module and a battery voltage judgment module;
the battery voltage detection module is respectively in signal connection with the first bidirectional switch and the battery voltage judgment module;
and the battery voltage judging module is in driving connection with the second bidirectional switch.
The utility model discloses battery breaker cubical switchboard has integrateed on traditional energy storage converter's basis, when the battery is under-voltage, when overdischarge or mistake closure second bilateral switch, battery breaker cubical switchboard control circuit and second bilateral switch cooperation disconnection battery through among the battery breaker cubical switchboard and the whole energy storage converter that has automatic protection function's connection, can avoid the battery under-voltage, overdischarge, or continue to discharge under the state of mistake closure second bilateral switch and damage the battery for the energy storage converter power supply that has automatic protection function or the internal device of the energy storage converter that has automatic protection function, with the purpose that reaches the energy storage converter that reaches the protection battery or has automatic protection function.
Drawings
Fig. 1 is a schematic circuit diagram of an energy storage converter provided in the prior art;
fig. 2 is a schematic structural diagram of an energy storage converter with an automatic protection function according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another energy storage converter with an automatic protection function according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another energy storage converter with an automatic protection function according to an embodiment of the present invention.
Wherein, 1, a battery; 2. a first bidirectional switch; 3. the energy storage converter has an automatic protection function; 4. A battery breaker switchgear; 5. an AC/DC converter; 6. a power grid; 7. a battery breaker switch cabinet control circuit; 8. a second bidirectional switch; 9. a fuse; 10. a battery voltage detection module; 11. and a battery voltage judging module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model discloses battery breaker cubical switchboard has been integrated on traditional energy storage converter's basis, when the battery is under-voltage, overdischarge or the closed second bilateral switch of mistake, through battery breaker cubical switchboard control circuit in the battery breaker cubical switchboard and the cooperation of second bilateral switch disconnection battery with the whole energy storage converter that has automatic protect function be connected. Therefore, the battery can be prevented from being continuously discharged to supply power to the energy storage converter with the automatic protection function to damage the battery or an internal device of the energy storage converter with the automatic protection function under the conditions of undervoltage, overdischarge or error closing of the second bidirectional switch, and the purpose of protecting the battery or the energy storage converter with the automatic protection function is achieved.
Example one
As shown in fig. 2, fig. 2 is a schematic structural diagram of an energy storage converter with an automatic protection function according to an embodiment of the present invention.
The energy storage converter 3 with automatic protection function comprises a battery breaker switch cabinet 4 and an alternating current/direct current converter 5.
The battery breaker switch cabinet 4 comprises a battery breaker switch cabinet control circuit and a second bidirectional switch, one end of the battery breaker switch cabinet control circuit is connected to a connecting line between the first bidirectional switch and the second bidirectional switch in a signal mode, and the other end of the battery breaker switch cabinet control circuit is connected to the second bidirectional switch in a driving mode.
The second bidirectional switch 8 is a bidirectional switch with an undervoltage coil, or a bidirectional switch which needs to meet a preset driving voltage.
The AC side of the AC/DC converter 5 is connected to the grid, and the DC side is connected to the second bidirectional switch 8 of the battery breaker switch cabinet 4. Of course, the ac side of the ac/dc converter 5 may also be connected to a load, such as an electrical device.
One end of the battery breaker switch cabinet control circuit 7 is in signal connection with the battery 1 through the first bidirectional switch 2.
The second bidirectional switch 8 may be a bidirectional switch with an undervoltage coil, such as a load switch or a circuit breaker with an undervoltage coil. The bidirectional switch may also be a bidirectional switch that needs to satisfy a preset driving voltage, such as any one of a contactor, a relay, an Insulated Gate Bipolar Transistor (IGBT), and a Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET) that can be activated only when the preset driving voltage needs to be satisfied. The insulated gate bipolar transistor may be an IGBT reverse series.
The AC/DC converter 5 may be denoted as a DC/AC converter for converting the DC power of the battery 1 into AC power and supplying it to the grid 6.
The battery Breaker cabinet 4 may be denoted as BCB-box (battery Circuit Breaker box).
The utility model discloses an in the embodiment, the integrated inside that sets up at traditional energy storage converter of battery breaker cubical switchboard 4. Thus, the battery breaker switch cabinet 4 and the AC/DC converter 5 are integrated in the energy storage converter together to form a new energy storage converter 3 with an automatic protection function.
In another embodiment of the present invention, the battery circuit breaker switch cabinet 4 is disposed outside the conventional energy storage converter. Thus, the battery breaker switch cabinet 4 and the AC/DC converter 5 work in a matching mode to form a new energy storage converter 3 with an automatic protection function.
Specifically, when the energy storage converter 3 with the automatic protection function normally works, the battery breaker switch cabinet control circuit 7 in the battery breaker switch cabinet 4 detects the voltage of the battery 1 and judges whether the voltage of the battery 1 is higher than a certain value, when the voltage of the battery 1 is higher than a certain value, the battery 1 is in a normal working state, and the second bidirectional switch 8 can be closed. When the voltage of the battery 1 is lower than a certain value, the battery 1 is in an undervoltage working state, the second bidirectional switch 8 cannot be closed, and the connection between the battery 1 and the energy storage converter 3 with the automatic protection function is disconnected, so that automatic voltage loss protection is realized.
It should be noted that, when the second bidirectional switch 8 is a bidirectional switch with an undervoltage coil, and the voltage of the battery 1 is higher than a certain value, the undervoltage coil of the second bidirectional switch 8 does not operate, at this time, the second bidirectional switch 8 may be closed, and the battery 1 is connected to the energy storage converter 3 with an automatic protection function, and thus operates normally.
And the voltage of the battery 1 is lower than a certain value, the undervoltage coil of the second bidirectional switch 8 can act, and the second bidirectional switch 8 cannot be closed, so that the connection between the battery 1 and the energy storage converter 3 with the automatic protection function is disconnected, and the automatic voltage loss protection is realized.
When the second bidirectional switch 8 is a bidirectional switch which needs to meet the preset driving voltage, and the voltage of the battery 1 is higher than a certain value, the driving voltage of the second bidirectional switch 8 meets the preset driving voltage, at the moment, the second bidirectional switch 8 can be closed, the battery 1 is connected with the energy storage converter 3 with the automatic protection function, and the energy storage converter 3 with the automatic protection function normally works.
And the voltage of the battery 1 is lower than a certain value, the driving voltage of the second bidirectional switch 8 does not meet the preset driving voltage, and the second bidirectional switch 8 cannot be closed, so that the connection between the battery 1 and the energy storage converter 3 with the automatic protection function is disconnected, and the energy storage converter 3 with the automatic protection function realizes automatic voltage loss protection.
It should be noted that the connection between the battery 1 and the energy storage converter 3 with the automatic protection function is cut off as long as the battery breaker switch cabinet control circuit 7 detects the voltage of the battery 1, and the connection is not affected by other control circuits in the energy storage converter 3 with the automatic protection function, so that the device can be effectively prevented from being damaged by over-discharge of the battery 1 or by impact current generated by mistakenly closing the second bidirectional switch 8 of the energy storage converter 3 with the automatic protection function. And further, the purpose of protecting the energy storage converter 3 with the automatic protection function is achieved.
The embodiment of the utility model provides an in, battery breaker cubical switchboard 4 has been integrated on traditional energy storage converter's basis, when battery 1 is undervoltage, overdischarge or the closed second bilateral switch 8 of mistake, through battery breaker cubical switchboard control circuit 7 in the battery breaker cubical switchboard 4 and the cooperation of second bilateral switch 8 disconnection battery 1 with whole energy storage converter 3 that has automatic protect function is connected. Therefore, the battery 1 can be prevented from being continuously discharged to supply power to the energy storage converter 3 with the automatic protection function under the conditions of undervoltage, overdischarge or error closing of the second bidirectional switch 8 to damage the battery 1 or internal devices of the energy storage converter 3 with the automatic protection function, and the purpose of protecting the battery 1 or the energy storage converter 3 with the automatic protection function is achieved.
Example two
As shown in fig. 3, on the basis of fig. 2, the battery breaker switchgear 4 further includes a fuse 9, and the fuse 9 is connected to a connection line between the first bidirectional switch 2 and the second bidirectional switch.
The fuse 9 may be replaced by a fuse or a fuse, or may be other elements having the same function.
Specifically, the fuse 9 is fused when a short-circuit fault occurs on the dc side of the converter, thereby realizing short-circuit protection.
In another embodiment of the present invention, the fuse 9 may be disposed on a connection line between the second bidirectional switch 8 and the dc side of the ac converter.
The embodiment of the utility model provides an in, can realize short-circuit protection through fuse 9 in the battery breaker cubical switchboard 4, avoid having the damage of the 3 internal elements of energy storage converter of automatic protect function, further reduce the hardware cost of the energy storage converter 3 that has automatic protect function.
EXAMPLE III
Referring to fig. 4, on the basis of fig. 2, the battery breaker switch cabinet control circuit 7 includes a battery voltage detection module 10 and a battery voltage judgment module 11.
The battery voltage detection module 10 is respectively connected to the first bidirectional switch 2 and the battery voltage determination module 11 through signals.
The battery voltage judging module 11 is in driving connection with the second bidirectional switch 8.
The battery voltage detection module 10 is used for detecting the voltage of the battery 1.
The battery voltage determining module 11 is configured to determine the voltage of the battery 1 received and a preset voltage, so as to determine whether the voltage of the battery 1 is under-voltage.
Specifically, when the battery voltage detection module 10 detects the voltage of the battery 1, the detected voltage of the battery 1 is transmitted to the battery voltage determination module 11 for voltage determination.
When the battery voltage judging module 11 judges that the voltage of the battery 1 is higher than the preset voltage, the second bidirectional switch 8 can be closed, so that the battery 1 can be connected with the energy storage converter 3 with the automatic protection function, and the energy storage converter 3 with the automatic protection function can work normally.
When the voltage of the battery 1 is lower than the preset voltage, the second bidirectional switch 8 cannot be closed, the connection between the battery 1 and the energy storage converter 3 with the automatic protection function is disconnected, and the energy storage converter 3 with the automatic protection function realizes automatic voltage loss protection.
The embodiment of the utility model provides an in, cooperate drive control second bilateral switch 8's operating condition jointly through battery voltage detection module 10 and battery voltage judgement module 11 of battery breaker cubical switchboard control circuit 7 to the realization has automatic protect function's energy storage converter 3's automatic undervoltage protection function. Therefore, when the battery 1 is under-voltage, the damage of the energy storage converter 3 with the automatic protection function or the internal devices of the battery 1 can be avoided, and the hardware cost of the energy storage converter 3 with the automatic protection function or the hardware cost of the battery 1 can be reduced.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. An energy storage converter with an automatic protection function is characterized by comprising an AC/DC converter and a battery breaker switch cabinet;
the battery breaker switch cabinet comprises a battery breaker switch cabinet control circuit and a second bidirectional switch, wherein one end of the battery breaker switch cabinet control circuit is connected to a connecting line between the first bidirectional switch and the second bidirectional switch in a signal mode, and the other end of the battery breaker switch cabinet control circuit is connected to the second bidirectional switch in a driving mode;
the second bidirectional switch is a bidirectional switch with an undervoltage coil or a bidirectional switch which needs to meet a preset driving voltage;
the alternating current side of the alternating current/direct current converter is connected with a power grid, and the direct current side of the alternating current/direct current converter is connected with a second bidirectional switch of the battery breaker switch cabinet;
one end of the battery breaker switch cabinet control circuit is in signal connection with the battery through the first bidirectional switch.
2. The energy storage converter with automatic protection as claimed in claim 1, wherein said battery breaker switch cabinet further comprises a fuse connected on a connection line between said first bidirectional switch and said second bidirectional switch.
3. An energy storage converter with automatic protection function according to any of claims 1-2, characterized in that the bidirectional switch with undervoltage coil is a load switch with undervoltage coil or a circuit breaker.
4. The energy storage converter with automatic protection function according to any one of claims 1-2, wherein the bidirectional switch required to satisfy the preset driving voltage is any one of a contactor, a relay, an insulated gate bipolar transistor, and a metal-oxide semiconductor field effect transistor required to satisfy the preset driving voltage.
5. The energy storage converter with automatic protection function as claimed in claim 1, wherein said battery breaker switch cabinet control circuit comprises a battery voltage detection module and a battery voltage judgment module;
the battery voltage detection module is respectively in signal connection with the first bidirectional switch and the battery voltage judgment module;
and the battery voltage judging module is in driving connection with the second bidirectional switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022066188.3U CN213782887U (en) | 2020-09-18 | 2020-09-18 | Energy storage converter with automatic protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022066188.3U CN213782887U (en) | 2020-09-18 | 2020-09-18 | Energy storage converter with automatic protection function |
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| CN213782887U true CN213782887U (en) | 2021-07-23 |
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| CN202022066188.3U Active CN213782887U (en) | 2020-09-18 | 2020-09-18 | Energy storage converter with automatic protection function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113809766A (en) * | 2021-10-29 | 2021-12-17 | 阳光电源股份有限公司 | Multi-bus energy storage system and control method thereof |
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- 2020-09-18 CN CN202022066188.3U patent/CN213782887U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113809766A (en) * | 2021-10-29 | 2021-12-17 | 阳光电源股份有限公司 | Multi-bus energy storage system and control method thereof |
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