CN223928100U - Control circuit of two-in-one high-voltage box and high-voltage box - Google Patents
Control circuit of two-in-one high-voltage box and high-voltage boxInfo
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- CN223928100U CN223928100U CN202520479078.XU CN202520479078U CN223928100U CN 223928100 U CN223928100 U CN 223928100U CN 202520479078 U CN202520479078 U CN 202520479078U CN 223928100 U CN223928100 U CN 223928100U
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- shunt
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Abstract
The application belongs to the field of energy storage systems, and provides a control circuit of a two-in-one high-voltage box and the high-voltage box, which comprise a first direct current loop, a second direct current loop, a first shunt relay, a second shunt relay, a first battery control unit, a second battery control unit, a first intermediate relay, a second intermediate relay and switching equipment. And if the failure of the disconnection of the shunt relay is detected, the battery control unit controls the disconnection of the switching equipment by controlling the intermediate relay so as to ensure that the fault circuit is thoroughly isolated. According to the application, the control circuits of the two battery clusters are connected in parallel, so that the space occupation rate of the high-voltage box is reduced, and the safety performance and the operation stability of the energy storage container are obviously improved through a double fault cut-off protection mechanism.
Description
Technical Field
The application belongs to the field of energy storage systems, and particularly relates to a control circuit of a two-in-one high-voltage box and the high-voltage box.
Background
The high-voltage box is used as a core component of the energy storage system and is used for carrying the key tasks of storing and releasing electric energy and guaranteeing the safe operation of the system. However, the conventional high-voltage cassettes operate independently of each other, not only occupying a large amount of space, but also increasing the complexity and cost of the system. As the space utilization requirements of energy storage containers continue to increase, reducing the volume of high voltage boxes becomes particularly urgent. Based on the above, the multi-in-one high-voltage box has the advantages that the functions of a plurality of independent high-voltage boxes are integrated, the equipment volume is obviously reduced, the space utilization rate is improved, and important support is provided for the compact design of the energy storage system.
However, the multi-in-one high-voltage box still faces many challenges, because the battery energy storage system is commonly connected with a plurality of batteries in parallel, when a single battery cluster circuit fails, the connection between the battery end and the load end is completely cut off, so that the whole energy storage container stops running, and unnecessary economic waste is caused.
Disclosure of utility model
In view of the above, the present application provides a control circuit of a two-in-one high voltage box and the high voltage box, so as to solve the above technical problems in the prior art, and mainly include:
In a first aspect, an embodiment of the present application provides a control circuit of a two-in-one high voltage box, including:
A first direct current loop and a second direct current loop, wherein the first direct current loop comprises a first shunt relay, the second direct current loop comprises a second shunt relay, and the first direct current loop and the second direct current loop are connected in parallel;
The first battery control unit is connected with the first shunt relay, and the second battery control unit is connected with the second shunt relay;
The first intermediate relay is connected with the first battery control unit, the second intermediate relay is connected with the second battery control unit, and the first intermediate relay and the second intermediate relay are connected in parallel;
The switching device is connected with the first intermediate relay and the second intermediate relay in parallel;
When the first battery control unit or the second battery control unit judges that the first direct current loop or the second direct current loop connected with the first battery control unit or the second battery control unit fails, the first shunt relay or the second shunt relay correspondingly connected with the first battery control unit or the second battery control unit is controlled to be disconnected, and if the first battery control unit or the second battery control unit judges that the first shunt relay or the second shunt relay fails to be disconnected, the first battery control unit or the second battery control unit controls the switch equipment to be disconnected through the first intermediate relay or the second intermediate relay.
In some embodiments, the first controlled circuit of the first intermediate relay is connected in parallel with the first controlled circuit of the second intermediate relay.
In some embodiments, the switching device is provided with a shunt release and an auxiliary contact, the shunt release being connected in parallel with the first controlled loop of the first intermediate relay and the first controlled loop of the second intermediate relay;
the auxiliary contact is connected with the first battery control unit.
In some embodiments, a second controlled loop of the second intermediate relay is connected with the second battery control unit.
In some embodiments, the first shunt relay and the second shunt relay are provided with detection contacts, the detection contacts of the first shunt relay are connected with the first battery control unit, and the detection contacts of the second shunt relay are connected with the second battery control unit.
In some embodiments, the first direct current loop further comprises a first pre-charge loop and a first main positive relay, the first pre-charge loop being connected in series with the first shunt relay after being connected in parallel with the first main positive relay;
The second direct current loop further comprises a second pre-charging loop and a second main positive relay, and the second pre-charging loop is connected with the second main positive relay in parallel and then connected with the second shunt relay in parallel.
In some embodiments, the first pre-charge loop comprises a first pre-charge relay and a first pre-charge resistor, the first pre-charge relay and the first pre-charge resistor being in series;
The second pre-charging loop comprises a second pre-charging relay and a second pre-charging resistor, and the second pre-charging relay is connected with the second pre-charging resistor in series.
In some embodiments, the switching device is a circuit breaker or a load switch.
In some embodiments, the first intermediate relay and the second intermediate relay each have 8 pins.
In a second aspect, an embodiment of the present application provides a high voltage box, including a control circuit of any one of the above two-in-one high voltage boxes.
The application has the following beneficial effects:
The application relates to a control circuit of a two-in-one high-voltage box and the high-voltage box. Specifically, the high-voltage box comprises a first direct current loop, a second direct current loop, a first shunt relay, a second shunt relay, a first battery control unit, a second battery control unit, a first intermediate relay, a second intermediate relay and a switch device. When the first battery control unit or the second battery control unit detects that the first direct current loop or the second direct current loop correspondingly connected with the first battery control unit or the second battery control unit fails, the first shunt relay or the second shunt relay is controlled to be disconnected so as to cut off only the failure loop. If the first shunt relay or the second shunt relay is detected to be disconnected, the first battery control unit or the second battery control unit further controls the switching device to be disconnected through the first intermediate relay or the second intermediate relay, so that the fault circuit is thoroughly isolated. Through the parallel design of the control circuits of the two battery clusters, the application not only realizes the integration of the high-voltage box, but also remarkably improves the safety performance and the operation stability of the energy storage container through a double fault cut-off protection mechanism. The design effectively solves the problem of low space utilization rate caused by equipment redundancy in the traditional high-voltage box scheme, and simultaneously provides a guarantee for safe operation of the energy storage container.
In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a dc circuit of the present application;
Fig. 2 shows an ac circuit of the present application.
In the figure, a first direct current loop, a second direct current loop, 110, a first main positive fuse, 120, a first main negative fuse, 130, a first shunt, 140, a first pre-charging resistor, 150, a first pre-charging relay, 160, a first main negative contactor, 170, a first main positive relay, 180, a switching device, 301, a shunt release, 302, an auxiliary contact, 200, a fan, 210, an AC/DC switching power supply, 220, a first intermediate relay, 230, a second intermediate relay, 240, a first battery control unit, 250, a second battery control unit, 260, a second main positive fuse, 270, a second main negative fuse, 280, a second shunt, 290, a second pre-charging resistor, 300, a second pre-charging relay, 310, a second main negative contactor, 320, a second main positive relay, 330, a first shunt relay, 340, and a second shunt relay.
Detailed Description
The term "comprising" in the description of the application and in the claims and in the drawings is synonymous with "including", "containing" or "characterized by", and is inclusive or open-ended and does not exclude additional unrecited elements or method steps. "comprising" is a technical term used in claim language to mean that the recited element is present, but other elements may be added and still form a construct or method within the scope of the recited claims.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in one figure, no further definition or explanation of that in the following figures is necessary, and furthermore, the terms "first," "second," "third," etc. are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
In an energy storage system, a high-voltage box is used as a core component and bears the key tasks of storing and releasing electric energy and guaranteeing the safe operation of the system. The traditional high-voltage boxes adopt independent modularized design, occupy a large amount of space, and are difficult to meet the requirement of the energy storage container on high space utilization rate. Therefore, the multi-in-one high-voltage box becomes the main stream, and the space utilization rate of the energy storage container is improved. However, in the multi-battery cluster parallel circuit, when a certain battery cluster circuit fails, the multi-in-one high-voltage box usually cuts off the power supply of all battery clusters, so that the battery clusters which work normally are forced to be powered off, not only is the system efficiency loss caused by the failure of a single battery cluster caused, but also the whole energy storage container is stopped to operate, and further unnecessary economic loss is brought.
Aiming at the problem, the application provides a control circuit of a two-in-one high-voltage box and the high-voltage box.
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Referring to fig. 1 and 2, a control circuit of a two-in-one high voltage box in the present embodiment includes:
A first direct current loop 1 and a second direct current loop 2, wherein the first direct current loop 1 comprises a first shunt relay 330, the second direct current loop 2 comprises a second shunt relay 340, and the first direct current loop 1 and the second direct current loop 2 are connected in parallel;
A first battery control unit 240 and a second battery control unit 250, the first battery control unit 240 being connected to the first shunt relay 330, the second battery control unit 250 being connected to the second shunt relay 340;
A first intermediate relay 220 and a second intermediate relay 230, the first intermediate relay 220 being connected to the first battery control unit 240, the second intermediate relay 230 being connected to the second battery control unit 250, the first intermediate relay 220 and the second intermediate relay 230 being connected in parallel;
A switching device 180, wherein the switching device 180 is connected in parallel with the first intermediate relay 220 and the second intermediate relay 230;
When the first battery control unit 240 or the second battery control unit 250 determines that the first direct current loop 1 or the second direct current loop 2 connected with the first battery control unit is failed, the first shunt relay 330 or the second shunt relay 340 connected correspondingly is controlled to be disconnected, and when the first battery control unit 240 or the second battery control unit 250 determines that the first shunt relay 330 or the second shunt relay 340 is failed to be disconnected, the first battery control unit 240 or the second battery control unit 250 controls the switch device 180 to be disconnected through the first intermediate relay 220 or the second intermediate relay 230.
In the application, the battery clusters are connected in parallel, so as to ensure the voltage balance among the battery clusters and prevent the battery clusters from being damaged by faults such as overcurrent, short circuit and the like, the battery clusters are respectively connected in series with the first direct current loop 1 and the second direct current loop 2, and the connection structures of the first direct current loop 1 and the second direct current loop 2 are the same. Specifically, the first dc link 1 includes a first main positive contactor 110, a first pre-charge link, a first shunt relay 330, a first main negative relay 160, a first shunt 130, and a first main negative fuse 120. The second dc link 2 includes a second main positive contactor 260, a second pre-charge link, a second shunt relay 340, a second main negative relay 310, a second shunt 280, and a second main negative fuse 270. The electric elements are connected in series and then connected with the battery clusters to form a loop, and the electric elements are respectively connected with the corresponding first battery control unit 240 and the corresponding second battery control unit 250.
In the power supply process of the battery cluster, if the first battery control unit 240 and the second battery control unit 250 detect that the electrical element is stuck, the first battery control unit 240 and the second battery control unit 250 output high-side signals preferentially, control the corresponding first shunt relay 330 and second shunt relay 340 to be disconnected, and cut off the direct current circuit corresponding to the failed battery cluster, so as to achieve the purpose of only singly disconnecting the failed battery cluster, but not disconnecting the power supply circuit of the normal battery cluster. By the mode, when a certain battery cluster power supply circuit is adhered, the work of other battery clusters is not affected, the system efficiency loss caused by single battery cluster faults is effectively avoided, and the reliability and the operation efficiency of the whole power supply system are improved.
If the first battery control unit 240 and the second battery control unit 250 detect that the first shunt relay 330 and the second shunt relay 340 are not opened, the first battery control unit 240 and the second battery control unit 250 output high-side signals again to control the first intermediate relay 220 and the second intermediate relay 230 to be attracted to each other, so that the switching device 180 is opened. This provides a dual protection mechanism for the battery clusters, in which the first battery control unit 240 or the second battery control unit 250 detects the disconnection of the first shunt relay 330 or the second shunt relay 340, and the first battery control unit 240 or the second battery control unit 250 controls the switch device 180 through the first intermediate relay 220 or the second intermediate relay 230 according to the detection result, so as to realize the shutdown management of all the battery clusters. The dual protection strategy not only can effectively isolate faults, but also can obviously improve the safety and reliability of the energy storage system, and provides dual guarantee for the operation of the system.
In this embodiment, the first controlled circuit of the first intermediate relay 220 is connected in parallel with the first controlled circuit of the second intermediate relay 230.
It should be explained that the present application has an ac circuit, which includes a fan 200, an AD/DC switching power supply 210, the first intermediate relay 220, the second intermediate relay 230, the first battery control unit 240, and the second battery control unit 250. The first intermediate relay 220 and the second intermediate relay 230 include a control circuit and a controlled circuit, and the controlled circuit includes a first controlled circuit and a second controlled circuit. The control circuit of the first intermediate relay 220 is connected to the first battery control unit 240, and the control circuit and the second controlled circuit of the second intermediate relay 230 are connected to the second battery control unit 250.
Specifically, the common terminal of the first controlled circuit of the first intermediate relay 220 is connected to the normally open terminal of the first controlled circuit of the second intermediate relay 230, and then connected to the L terminal of the AD/DC switching power supply 210, and the normally open terminal of the first controlled circuit of the first intermediate relay 220 is connected to the common terminal of the second intermediate relay 230.
Further, the switching device 180 is provided with a shunt release 301 and an auxiliary contact 302, and the shunt release 301 is connected in parallel with the first controlled loop of the first intermediate relay 220 and the first controlled loop of the second intermediate relay 230;
The auxiliary contact 302 is connected to the first battery control unit 240.
Specifically, one end of the shunt release 301 is connected in parallel to the normal end of the first controlled circuit of the first intermediate relay 220 and the common end of the first controlled circuit of the second intermediate relay 230, and the other end is connected to the N end of the AD/DC switching power supply 210.
Thus, the AD/DC switching power supply 210, the first intermediate relay 220, the second intermediate relay 230, and the shunt release 301 of the switching device 180 are connected to form two loops.
When the first battery control unit 240 or the second battery control unit 250 detects that the first shunt relay 330 or the second shunt relay 340 correspondingly connected with the first battery control unit 240 or the second battery control unit 250 is stuck, the first battery control unit 240 or the second battery control unit 250 outputs a high-level signal to the control loop of the first intermediate relay 220 or the second intermediate relay 230 correspondingly connected with the first shunt relay, the controlled loop of the first intermediate relay 220 or the second intermediate relay 230 is sucked under the action of the control loop, and then the loop formed by the AD/DC switching power supply 210, the first intermediate relay 220, the second intermediate relay 230 and the shunt release 301 is conducted, and the switching device 180 is disconnected under the action of the shunt release 301. The first battery control unit 240 may determine the operating state of the switching device 180 through a signal of the auxiliary contact 302 of the switching device 180. The fan 200 may reduce the temperature of the high-pressure case when it is operated.
Further, a second controlled loop of the second intermediate relay 230 is connected to the second battery control unit 250.
When the first control loop of the second intermediate relay 230 is turned on, the second controlled loop is also turned on, so that the second battery control unit 250 can determine the on-off state of the switching device 180 through the second controlled loop signal of the second intermediate relay 230.
In some embodiments, the first shunt relay 330 and the second shunt relay 340 are provided with detection contacts, the detection contacts of the first shunt relay 330 are connected with the first battery control unit 240, and the detection contacts of the second shunt relay 340 are connected with the second battery control unit 250.
The detection auxiliary contact is configured to feed back the states of the first shunt relay 330 and the second shunt relay 340 to the first battery control unit 240 and the second battery control unit 250, so as to prevent a safety problem caused by adhesion of the first shunt relay 330 and the second shunt relay 340. In addition, the electric components are provided with auxiliary contacts for detection, and in the process of detecting whether the electric components are stuck, the first battery control unit 240 and the second battery control unit 250 further determine the electric components which are stuck on the basis of comparing the voltage detection point potential differences (which is not described in the prior art) with the auxiliary contacts for electric components. The protection mechanism can be triggered by the first battery control unit 240 or the second battery control unit 250 detecting any electrical component abnormality.
In some embodiments, the first dc link 1 further includes a first pre-charge loop and a first main positive relay 170, wherein the first pre-charge loop is connected in series with the first shunt relay 330 after being connected in parallel with the first main positive relay 170;
The second dc circuit 2 further includes a second pre-charging circuit and a second main positive relay 320, where the second pre-charging circuit is connected in parallel with the second main positive relay 320 and then connected in parallel with the second shunt relay 340.
In the case of multi-cell clusters connected in parallel, if there is a difference in voltage of each cell cluster, a circulation current is formed. The circulation can cause an energy imbalance between the clusters, increasing the losses of the system. To avoid this, a pre-charge loop needs to be added between the positive and negative electrodes of each cluster to ensure that the voltage across each cluster remains consistent. The first pre-charging loop comprises a first pre-charging relay 150 and a first pre-charging resistor 140, the first pre-charging relay 150 and the first pre-charging resistor 140 are connected in series, the second pre-charging loop comprises a second pre-charging relay 300 and a second pre-charging resistor 290, and the second pre-charging relay 300 and the second pre-charging resistor 290 are connected in series.
When the battery clusters are powered, if the voltage difference existing between the battery clusters is within the set value range, the first pre-charging relay 150 or the second pre-charging relay 300 is closed, so that the first pre-charging loop or the second pre-charging loop is conducted, and the battery clusters with higher total voltage are discharged in a small current manner through the pre-charging loop, so that the purpose of balancing the voltages among the battery clusters is achieved.
In some embodiments, the switching device 180 is a circuit breaker or a load switch.
In this embodiment, the first intermediate relay 220 and the second intermediate relay 230 are respectively 8 pins. The relay is in a normally open state, when the relay coil is electrified, the relay is attracted, and when the relay is deenergized, the relay is released.
The application also provides a high-voltage box, which comprises the control circuit of the two-in-one high-voltage box.
The foregoing has outlined rather broadly the more detailed description of embodiments of the application, wherein the principles and embodiments of the application are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
Claims (10)
1. A control circuit of a two-in-one high voltage box, comprising:
-a first dc-link (1) and a second dc-link (2), the first dc-link (1) comprising a first shunt relay (330), the second dc-link (2) comprising a second shunt relay (340), the first dc-link (1) and the second dc-link (2) being connected in parallel;
A first battery control unit (240) and a second battery control unit (250), the first battery control unit (240) being connected to the first shunt relay (330), the second battery control unit (250) being connected to the second shunt relay (340);
A first intermediate relay (220) and a second intermediate relay (230), the first intermediate relay (220) being connected to the first battery control unit (240), the second intermediate relay (230) being connected to the second battery control unit (250), the first intermediate relay (220) and the second intermediate relay (230) being connected in parallel;
A switching device (180), the switching device (180) being connected in parallel with the first intermediate relay (220) and the second intermediate relay (230);
When the first battery control unit (240) or the second battery control unit (250) judges that the first direct current loop (1) or the second direct current loop (2) connected with the first battery control unit or the second battery control unit is in fault, the first shunt relay (330) or the second shunt relay (340) which are correspondingly connected is controlled to be disconnected, and if the first battery control unit (240) or the second battery control unit (250) judges that the first shunt relay (330) or the second shunt relay (340) is disconnected, the first battery control unit (240) or the second battery control unit (250) controls the switch device (180) to be disconnected through the first intermediate relay (220) or the second intermediate relay (230).
2. The control circuit of a two-in-one high voltage box according to claim 1, wherein the first controlled circuit of the first intermediate relay (220) is connected in parallel with the first controlled circuit of the second intermediate relay (230).
3. The control circuit of the two-in-one high-voltage box according to claim 1, wherein the switching device (180) is provided with a shunt release (301) and an auxiliary contact (302), and the shunt release (301) is connected in parallel with a first controlled loop of the first intermediate relay (220) and a first controlled loop of the second intermediate relay (230);
The auxiliary contact (302) is connected to the first battery control unit (240).
4. A control circuit of a two-in-one high voltage cartridge according to claim 3, characterized in that the second controlled loop of the second intermediate relay (230) is connected to the second battery control unit (250).
5. The control circuit of a two-in-one high voltage box according to claim 1, wherein the first shunt relay (330) and the second shunt relay (340) are provided with detection contacts, the detection contacts of the first shunt relay (330) are connected with the first battery control unit (240), and the detection contacts of the second shunt relay (340) are connected with the second battery control unit (250).
6. The control circuit of a two-in-one high voltage box according to claim 1, wherein the first dc circuit (1) further comprises a first pre-charge circuit and a first main positive relay (170), and the first pre-charge circuit is connected in series with the first shunt relay (330) after being connected in parallel with the first main positive relay (170);
The second direct current loop (2) further comprises a second pre-charging loop and a second main positive relay (320), and the second pre-charging loop is connected with the second main positive relay (320) in parallel and then connected with the second shunt relay (340) in parallel.
7. The control circuit of a two-in-one high voltage cartridge of claim 6, wherein the first pre-charge circuit comprises a first pre-charge relay (150) and a first pre-charge resistor (140), the first pre-charge relay (150) and the first pre-charge resistor (140) being connected in series;
The second pre-charge circuit comprises a second pre-charge relay (300) and a second pre-charge resistor (290), wherein the second pre-charge relay (300) and the second pre-charge resistor (290) are connected in series.
8. A control circuit of a two-in-one high voltage cartridge according to claim 1, characterized in that the switching device (180) is a circuit breaker or a load switch.
9. The control circuit of a two-in-one high voltage box according to claim 1, wherein the first intermediate relay (220) and the second intermediate relay (230) have 8 pins, respectively.
10. A high voltage cartridge comprising a control circuit of a two-in-one high voltage cartridge according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520479078.XU CN223928100U (en) | 2025-03-18 | 2025-03-18 | Control circuit of two-in-one high-voltage box and high-voltage box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520479078.XU CN223928100U (en) | 2025-03-18 | 2025-03-18 | Control circuit of two-in-one high-voltage box and high-voltage box |
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| Publication Number | Publication Date |
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| CN223928100U true CN223928100U (en) | 2026-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202520479078.XU Active CN223928100U (en) | 2025-03-18 | 2025-03-18 | Control circuit of two-in-one high-voltage box and high-voltage box |
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| Country | Link |
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| CN (1) | CN223928100U (en) |
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