Energy storage output control system

Abstract

The application discloses an energy storage output control system, which comprises a first relay, an energy storage power supply, a control branch and a load port, the energy storage power supply is connected with the load port through the first relay, the control end of the first relay is connected with the control branch, the control branch comprises a second relay, the switching state of the second relay is influenced by the power supply state of an external power supply, so that the control branch controls the first relay to be disconnected when the time length of disconnection of the external power supply reaches a preset power-off time length. The application can control the power supply time length of the load port according to the power-off time of the external power supply, and can effectively improve the energy utilization rate of the energy storage power supply.

Description

Technical Field

[0001] This invention relates to the field of energy storage system technology, and in particular to an energy storage output control system. Background Technology

[0002] Energy storage power supplies can provide the voltage required to maintain the operation of external loads after the mains power fails. However, different external loads require different backup power times. In order to meet the backup power time of each external load, the relevant technologies mainly design the battery capacity of the energy storage power supply based on the total backup power time of the external loads until the battery is depleted and the energy storage power supply is shut down. However, this method will lead to a decrease in the energy utilization rate of the energy storage power supply. Summary of the Invention

[0003] This invention provides an energy storage output control system that can control the power supply duration of the load port according to the power outage time of the external power source, thereby effectively improving the energy utilization rate of the energy storage power source.

[0004] In a first aspect, embodiments of the present invention provide an energy storage output control system, the energy storage output control system including a first relay, an energy storage power supply, a control branch and a load port, the energy storage power supply being connected to the load port through the first relay, the control terminal of the first relay being connected to the control branch, the control branch including a second relay, the switching state of the second relay being affected by the power supply state of an external power supply, so that the control branch controls the first relay to disconnect when the duration of the external power supply disconnection reaches a preset power outage duration.

[0005] According to an embodiment of the first aspect of the present invention, the energy storage output control system has at least the following beneficial effects: After an external load is connected to the energy storage power supply through a load port, when the external power supply is disconnected, the energy storage power supply can provide the operating voltage required for operation to the external load through the load port. The energy storage power supply is connected to the load port through a first relay, so that the first relay can control the power supply status of the energy storage power supply to the load port. Since the control terminal of the first relay is connected to the control branch, that is, the control branch can control the power supply status of the energy storage power supply to the load port, and the switching state of the second relay in the control branch is affected by the power supply status of the external power supply. Therefore, the control branch can determine the power supply status of the external power supply based on the switching state of the second relay, and then control the first relay to disconnect when the duration of the external power disconnection reaches a preset power outage duration, wherein the preset power outage duration is the backup power time of the external load, that is, based on the backup power time of the external load, the switching state of the first relay is controlled by the control branch, thereby controlling the power supply duration of the load port, thereby improving the energy utilization rate of the energy storage power supply and avoiding the situation where the energy storage power supply output is turned off after the battery is depleted.

[0006] In the energy storage output control system provided in this embodiment of the invention, the second relay is connected to the energy storage power supply to form a current loop, and the control terminal of the first relay is connected to the current loop.

[0007] In the energy storage output control system provided in this embodiment of the invention, when the duration of the external power supply being in the off state reaches a preset power outage duration, the second relay is in the closed state, so that the first relay is energized and disconnected.

[0008] In the energy storage output control system provided in the embodiments of the present invention, when the external power supply is in a conducting state, the second relay is in a disconnected state, so that the first relay is de-energized and closed.

[0009] In the energy storage output control system provided in this embodiment of the invention, the control branch further includes a power management module. The power management module includes a control chip and a first branch. The control chip is used to control the on / off state of the first branch according to the power supply status of the external power supply. The first branch is connected in parallel with the second relay. A first connection point is provided between the first branch and the second relay. The energy storage power supply is connected to the first connection point. The control terminal of the first relay is connected between the first connection point and the energy storage power supply.

[0010] In the energy storage output control system provided in the embodiments of the present invention, the energy storage output control system further includes a third relay, the third relay and the control chip form a signal feedback loop, the third relay is used to control the conduction and disconnection of the signal feedback loop, and the switching state of the third relay is affected by the power supply state of the external power source.

[0011] In the energy storage output control system provided in this embodiment of the invention, when the external power supply is in a conducting state, the third relay is in a closed state, and the signal feedback branch is conducting.

[0012] In the energy storage output control system provided in this embodiment of the invention, when the external power supply is disconnected, the third relay is disconnected and the signal feedback loop is disconnected.

[0013] In the energy storage output control system provided in this embodiment of the invention, when the external power supply is disconnected, the second relay is disconnected, and the control chip counts the power outage duration; wherein, when the duration of the external power supply disconnection reaches a preset power outage duration, the control chip disconnects the first branch to de-energize and disconnect the first relay.

[0014] In the energy storage output control system provided in this embodiment of the invention, when the external power supply is in a conducting state, the second relay is in a closed state to maintain the first relay in a closed state.

[0015] In the energy storage output control system provided in this embodiment of the invention, when the second relay is disconnected, a power failure alarm signal is issued.

[0016] In the energy storage output control system provided in this embodiment of the invention, the power of the energy storage power source is obtained, and when the power of the power source is less than a preset power threshold, a power alarm signal is issued.

[0017] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0018] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0019] Figure 1 This is a schematic diagram of the energy storage output control system provided in an embodiment of the present invention;

[0020] Figure 2 A partial schematic diagram of the energy storage output control system provided in an embodiment of the present invention;

[0021] Figure 3 A partial schematic diagram of an energy storage output control system provided in another embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of an energy storage output control system provided in another embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of an energy storage output control system provided in another embodiment of the present invention;

[0024] Figure 6 This is a partial schematic diagram of an energy storage output control system provided in another embodiment of the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be 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 and not intended to limit the invention.

[0026] It is understandable that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, or the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0027] Energy storage power supplies can provide the voltage required to maintain the operation of external loads after the mains power fails. However, different external loads require different backup power times. In order to meet the backup power time of each external load, the relevant technologies mainly design the battery capacity of the energy storage power supply based on the total backup power time of the external loads until the battery is depleted and the energy storage power supply is shut down. However, this method will lead to a decrease in the energy utilization rate of the energy storage power supply.

[0028] Based on this, the present invention provides an energy storage output control system. The energy storage power supply is connected to the load port via a first relay, so that the first relay can control the power supply from the energy storage power supply to the load port. Since the control terminal of the first relay is connected to the control branch, the control branch can control the power supply from the energy storage power supply to the load port. The switching state of the second relay within the control branch is affected by the power supply status of the external power source. After the external load is connected to the energy storage power supply through the load port, when the external power source is disconnected, the energy storage power supply can provide the required operating voltage to the external load through the load port. Therefore, the control branch can determine the power supply status of the external power source based on the switching state of the second relay. Then, when the duration of the external power source disconnection reaches a preset power outage duration, the control branch controls the first relay to disconnect. The preset power outage duration is the backup power time of the external load. That is, based on the backup power time of the external load, the control branch controls the switching state of the first relay, thereby controlling the power supply duration of the load port, thereby improving the energy utilization rate of the energy storage power supply and avoiding the situation where the energy storage power supply output is shut off only after the battery is depleted.

[0029] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0030] Reference Figure 1 , Figure 1 This is a schematic diagram of the energy storage output control system provided in an embodiment of the present invention.

[0031] It is understood that the energy storage output control system includes a first relay 400, an energy storage power supply 100, a control branch 500, and a load port 300. The load port 300 is used to connect to an external load. After the external load is connected to the energy storage power supply 100 through the load port 300, the energy storage power supply 100 can provide the operating voltage required for operation to the external load through the load port 300 when the external power supply 200 is in the off state. The switching terminal of the first relay 400 is located between the energy storage power supply 100 and the load port 300 so that the first relay 400 can control the power supply from the energy storage power supply 100 to the load port 300.

[0032] When the first relay 400 is in the off state, the energy storage power supply 100 is disconnected from the load port 300, and the energy storage power supply 100 stops supplying power to the external load connected to the load port 300.

[0033] When the first relay 400 is in the closed state, the energy storage power supply 100 is connected to the load port 300, and the energy storage power supply 100 supplies power to the external load connected to the load port 300.

[0034] The control branch 500 is connected to the control terminal of the first relay 400. The control branch 500 can control the opening and closing of the first relay 400 by controlling the energization and de-energization of the control terminal of the first relay 400. That is, the control branch 500 can control the power supply of the energy storage power supply 100 to the external load through the load port 300 by controlling the first relay 400.

[0035] For example, if the duration of the external power supply 200 being disconnected reaches the preset power outage duration, the control branch 500 can control the first relay 400 to disconnect, causing the energy storage power supply 100 to stop supplying power to the external load connected to the load port 300, so that the energy storage output control system can control the power supply duration of the load port according to the power outage time of the external power supply.

[0036] It should be noted that the control branch 500 includes a second relay 510, and the switching state of the second relay 510 is affected by the power supply state of the external power supply 200. Therefore, the control branch 500 can determine the power supply state of the external power supply 200 based on the switching state of the second relay 510, and control the first relay 400 to open and close accordingly.

[0037] For example, when the current switching state of the second relay 510 indicates that the external power supply 200 is in the off state, the duration of the external power supply 200 being in the off state is calculated. If the duration of the external power supply 200 being off reaches the preset power outage duration, the control branch 500 can control the first relay 400 to disconnect, causing the energy storage power supply 100 to stop supplying power to the external load connected to the load port 300. The preset power outage duration is the backup power time for the external load.

[0038] It should be noted that different external loads require different backup power times. Once the backup power time for an external load is reached, the energy storage power supply 100 can stop supplying power. However, in related technologies, the energy storage power supply 100 cannot actively disconnect from the external load. That is, even after the required backup power time for the external load is reached, the energy storage power supply 100 continues to supply power. In this case, the connection between the energy storage power supply 100 and the external load can only be manually disconnected, or the energy storage power supply 100 can be turned off after its power is depleted, which is very inconvenient. To meet the backup power time requirements of different external loads, related technologies design the battery capacity of the energy storage power supply 100 based on the total backup power time of all external loads. In actual use, when the energy storage power supply 100 is not fully loaded, the total backup power time of the external loads is not equal to the battery capacity of the energy storage power supply 100. If the power supply to the energy storage power supply 100 cannot be disconnected in time, and the energy storage power supply 100 is turned off after its power is depleted, the energy utilization rate of the energy storage power supply 100 will decrease.

[0039] Therefore, in the embodiments of the present invention, by controlling the first relay 400 to disconnect when the duration of the external power supply 200 being disconnected reaches the backup power time of the external load, the energy utilization rate of the energy storage power supply 100 can be effectively improved.

[0040] It is understandable that, such as Figure 2 As shown, Figure 2This is a partial schematic diagram of the energy storage output control system provided in an embodiment of the present invention. The energy storage power supply 100 includes multiple load ports 300, each of which is connected to an external load. When the external power supply 200 is disconnected, the energy storage power supply 100 simultaneously supplies power to multiple external loads through the multiple load ports 300. The multiple external loads include important external loads and unimportant external loads. The backup power time of the important external loads is longer than that of the unimportant external loads. The load ports 300 connected to the important external loads are considered important ports, and the load ports 300 connected to the unimportant external loads are considered unimportant ports. Therefore, the first switch contact of the first relay 400 is connected to the energy storage power supply 100, and the second switch contact of the first relay 400 is connected to each unimportant port. After the unimportant external load reaches its backup power time, the first relay 400 is disconnected, promptly cutting off the connection between the unimportant external load and the energy storage power supply 100. The energy storage output control system can control the power supply duration of different load ports according to the power outage time of the external power supply, thereby improving the energy utilization rate of the energy storage power supply 100 while ensuring the stable operation of important external loads.

[0041] It is understandable that, such as Figure 3 As shown, Figure 3 This is a partial schematic diagram of an energy storage output control system provided in another embodiment of the present invention. The energy storage power supply 100 includes multiple load ports 300, and the energy storage output control system includes multiple first relays 400 connected to the load ports 300. That is, each load port 300 is connected to the energy storage power supply 100 with a first relay 400. The control branch 500 can control the closing and opening of each first relay 400 according to the backup power time of each load port 300.

[0042] Reference Figure 4 , Figure 4 This is a schematic diagram of the energy storage output control system provided in another embodiment of the present invention.

[0043] Understandably, the second relay 510 includes a third switch contact and a fourth switch contact. The third switch contact is connected to the output terminal of the energy storage power supply 100, and the fourth switch contact is connected to the input terminal of the energy storage power supply 100, so that the second relay 510 and the energy storage power supply 100 form a current loop. The control terminal of the first relay 400 is connected between the input terminal of the energy storage power supply 100 and the fourth switch contact. When the third and fourth switch contacts are closed, the control terminal of the first relay 400 is energized; similarly, when the third and fourth switch contacts are open, the control terminal of the first relay 400 is de-energized. The energization and de-energization of the control terminal of the second relay 510 are affected by the power supply status of the external power supply 200, that is, the opening and closing of the third and fourth switch contacts are affected by the power supply status of the external power supply 200.

[0044] Specifically, when the external power supply 200 is in the off state for a preset power-off time, the third and fourth switch contacts close, forming a complete current loop with the energy storage power supply 100, the control terminal of the first relay 400, the third switch contact, and the fourth switch contact. The first relay 400 is energized, and its first and second switch contacts disconnect, cutting off the connection between the energy storage power supply 100 and the load port 300, and stopping the energy storage power supply 100 from supplying power to the external load. Similarly, when the external power supply 200 is in the on state, the third and fourth switch contacts disconnect, preventing the energy storage power supply 100, the control terminal of the first relay 400, the third switch contact, and the fourth switch contact from forming a complete current loop. The first relay 400 is de-energized, and its first and second switch contacts close. When the external power supply 200 is in a disconnected state but the duration of the disconnection is less than the preset power outage duration, the third switch contact and the fourth switch contact remain disconnected, the first relay 400 is de-energized, and the first switch contact and the second switch contact of the first relay 400 close, so that when the external power supply 200 is in a disconnected state, the energy storage power supply 100 supplies power to the external load through the load port 300.

[0045] It should be noted that the second relay 510 is a time relay. After the external power supply 200 is disconnected, the control terminal of the second relay 510 enters a timing state. When the timing duration of the second relay 510 reaches the preset power-off duration, the control terminal of the second relay 510 controls the third and fourth switch contacts to close. The energy storage power supply 100, the control terminal of the first relay 400, the third switch contact, and the fourth switch contact form a complete current loop. The first relay 400 is energized, and the first and second switch contacts of the first relay 400 are disconnected. The connection between the energy storage power supply 100 and the load port 300 is cut off, and the energy storage power supply 100 stops supplying power to the external load. When the external power supply 200 is disconnected, a disconnection signal can be sent to the second relay 510. After receiving the disconnection signal, the control terminal of the second relay 510 enters a timing state.

[0046] Specifically, the energy storage power supply 100 also includes multiple load ports 300, and the energy storage output control system also includes multiple first relays 400 and control branches 500 connected to the load ports 300. That is, each load port 300 is connected to the energy storage power supply 100 by a first relay 400 and a control branch 500. The control branch 500 can control the closing and opening of each first relay 400 according to the duration of the external power supply 200 being in the off state.

[0047] For example, the energy storage power supply 100 includes a first load port and a second load port. The energy storage output control system includes a first control branch and a second control branch. The first control branch is connected to the control terminal of the first relay 400 between the energy storage power supply 100 and the first load port. The second control branch is also connected to the control terminal of the first relay 400 between the energy storage power supply 100 and the second load port. The backup power time for the external load connected to the first load port is a first duration, and the backup power time for the external load connected to the second load port is a second duration. After the external power supply 200 is disconnected, the second relay 510 in the first control branch and the second relay 510 in the second control branch simultaneously enter a timing state. If the timing duration of the second relay 510 in the first control branch reaches the first duration, the third and fourth switch contacts of the second relay 510 in the first control branch close, the control terminal of the first relay 400 in the first control branch is energized, and the connection between the energy storage power supply 100 and the first load port is disconnected. If the timing duration of the second relay 510 in the second control branch reaches the second duration, the third and fourth switch contacts of the second relay 510 in the second control branch will close, the control terminal of the first relay 400 in the second control branch will be energized, and the connection between the energy storage power supply 100 and the second load port will be disconnected. Where the second duration is longer than the first duration, after the connection between the energy storage power supply 100 and the load port 300 is disconnected, the connection between the energy storage power supply 100 and the load port 300 will only be restored after the external power supply 200 restores its connection with the energy storage power supply 100.

[0048] Reference Figure 5 , Figure 5 This is a schematic diagram of the energy storage output control system provided in another embodiment of the present invention.

[0049] It is understood that the control branch 500 also includes a power management module 520. The power management module 520 includes a control chip 522 and a first branch 521. The control chip 522 is used to control the on / off state of the first branch 521 according to the power supply status of the external power supply 200. The first branch 521 is connected in parallel with the second relay 510. For example, if the external power supply 200 is in the off state for a preset power-off time, the first branch 521 can be controlled to disconnect; if the external power supply 200 is in the on state, the first branch 521 can be controlled to connect.

[0050] Specifically, the connection point between the first branch 521 and the third switch contact is the first connection point, the connection point between the first branch 521 and the fourth switch contact is the second connection point, the output terminal of the energy storage power supply 100 is connected to the first connection point, the input terminal of the energy storage power supply 100 is connected to the second connection point, and the control terminal of the first relay 400 is connected between the first connection point and the energy storage power supply 100.

[0051] It should be noted that when the third and fourth switch contacts are closed, the current output by the energy storage power supply 100 forms a current loop through the control terminal of the first relay 400, the third switch contact, the fourth switch contact, and the output terminal of the energy storage power supply 100. Since the first branch 521 is connected in parallel with the second relay 510, the current output by the energy storage power supply 100 will also flow through the first branch 521 when the third and fourth switch contacts are closed. When the third switch contact and the fourth switch contact are in the open state, the current output by the energy storage power supply 100 forms a current loop through the control terminal of the first relay 400, the first branch 521, and the output terminal of the energy storage power supply 100. At this time, if the control chip 522 controls the first branch 521 to be turned on, the control terminal of the first relay 400, the first branch 521, and the output terminal of the energy storage power supply 100 form a current loop, and the control terminal of the first relay 400 is energized. If the control chip 522 controls the first branch 521 to be turned off, the control terminal of the first relay 400, the first branch 521, and the output terminal of the energy storage power supply 100 cannot form a current loop, and the control terminal of the first relay 400 is de-energized.

[0052] Specifically, when the external power supply 200 is disconnected, the third switch contact and the fourth switch contact are disconnected. The control terminal of the first relay 400, the first branch 521, and the output terminal of the energy storage power supply 100 form a current loop. At this time, the control chip 522 counts the power outage duration. When the duration of the external power supply 200 disconnection reaches the preset power outage duration, the control chip 522 disconnects the first branch 521. The control terminal of the first relay 400, the first branch 521, and the output terminal of the energy storage power supply 100 cannot form a current loop. The control terminal of the first relay 400 loses power, and then the first switch contact and the second switch contact of the first relay 400 are disconnected. The connection between the energy storage power supply 100 and the load port 300 is cut off, and the energy storage power supply 100 stops supplying power to the external load. Similarly, when the external power supply 200 is in the conducting state, the third switch contact and the fourth switch contact are in the closed state, the control terminal of the first relay 400 is energized, and then the first switch contact and the second switch contact of the first relay 400 are in the closed state, and the energy storage power supply 100 supplies power to the external load through the load port 300.

[0053] Understandably, the energy storage output control system also includes a charging circuit. The external power source 200 is AC mains power, which charges the energy storage power source 100 through the charging circuit. The control terminal of the second relay 510 forms a current loop with the charging circuit. When AC mains power supplies the energy storage power source 100 through the charging circuit, the control terminal of the second relay 510 is energized, and the third and fourth switch contacts close. The control terminal of the first relay 400, the third and fourth switch contacts, and the output terminal of the energy storage power source 100 form a current loop. Similarly, when AC mains power stops supplying the energy storage power source 100, the control terminal of the second relay 510 is de-energized, and the third and fourth switch contacts open. At this time, the control terminal of the first relay 400, the first branch 521, and the output terminal of the energy storage power source 100 form a current loop.

[0054] Understandably, the first branch 521 can be a transistor. The connection point between the third switch contact and the collector of the transistor is the first connection point, and the connection point between the fourth switch contact and the emitter of the transistor is the second connection point. The control chip 522 is connected to the base of the transistor. When the control chip 522 sends a high-level signal to the base of the transistor, the transistor conducts, i.e., the first branch 521 conducts. Similarly, when the control chip 522 sends a low-level signal to the base of the transistor, the transistor is cut off, i.e., the first branch 521 is short-circuited.

[0055] It should be noted that the energy storage power supply 100 also includes multiple load ports 300, the energy storage output control system includes multiple first relays 400 connected to the load ports 300, the power management module 520 includes multiple first branches 521, and the control chip 522 is connected to multiple first branches 521 respectively, so that the control chip 522 can control different first branches 521 to cut off according to the power outage time of the external power supply, thereby controlling the power supply duration of different load ports and improving the energy utilization rate of the energy storage power supply 100. The second relay 510 includes a control terminal and multiple switching terminals corresponding to the first branches 521. Each load port 300 is connected to the energy storage power supply 100 by a first relay 400.

[0056] For example, the energy storage power supply 100 includes a first load port and a second load port, the power management module 520 includes a second branch and a third branch, and the second relay 510 includes a first switch terminal and a second switch terminal. The first switch terminal is connected in parallel with the second branch. The control terminal of the first relay 400, located between the first load port and the energy storage power supply 100, is connected to the first switch terminal and the second branch respectively. The second switch terminal is connected in parallel with the third branch, and the control terminal of the first relay 400, located between the second load port and the energy storage power supply 100, is connected to the second switch terminal and the third branch respectively. The backup power time for the external load connected to the first load port is a first duration, and the backup power time for the external load connected to the second load port is a second duration. After the external power supply 200 is disconnected, the second relay 510 controls the first switch terminal and the second switch terminal to disconnect simultaneously, and the control chip 522 enters a timing state. If the timing duration of the control chip 522 reaches the first duration, the control chip 522 controls the second branch to disconnect, and the connection between the energy storage power supply 100 and the first load port is cut off. If the timing duration of the control chip 522 reaches the second duration, the control chip 522 controls the third branch to disconnect, and the connection between the energy storage power supply 100 and the second load port is cut off. Where the second duration is longer than the first duration, after the connection between the energy storage power supply 100 and the load port 300 is cut off, the connection between the energy storage power supply 100 and the load port 300 will only be restored after the external power supply 200 restores its connection with the energy storage power supply 100.

[0057] Understandably, the control chip 522 can also be used to issue a power failure alarm signal when the second relay 510 is disconnected. The control chip 522 can also send a power failure alarm signal to the user's mobile device based on the pre-set contact information of the user's mobile device. The power failure alarm signal includes, but is not limited to, SMS reminders, telephone voice reminders, etc. The control chip 522 can also directly issue an audible warning signal or an optical prompt signal when issuing a power failure alarm signal.

[0058] It should be noted that the control chip 522 is also connected to the energy storage power supply 100. The control chip 522 can also be used to acquire the power level of the energy storage power supply 100. When the power level is less than a preset power threshold, a power alarm signal is issued. The control chip 522 can also issue a power alarm signal to the user's mobile device based on pre-set user mobile device contact information. The power alarm signal includes, but is not limited to, SMS reminders and telephone voice reminders. The control chip 522 can also issue a power alarm signal by directly issuing an audible warning signal or an optical prompt signal. The power threshold can be adjusted according to actual usage conditions, and this invention does not impose specific limitations.

[0059] It should be noted that the control chip 522 can also be connected to the load port 300 to obtain the backup power time of the external load connected to the load port 300.

[0060] Reference Figure 6 , Figure 6 This is a partial schematic diagram of an energy storage output control system provided in another embodiment of the present invention.

[0061] Understandably, the energy storage output control system also includes a third relay 700, which forms a signal feedback loop with the control chip 522. The third relay 700 includes a fifth switch contact and a sixth switch contact. The fifth switch contact is connected to the output terminal of the control chip 522, and the sixth switch contact is connected to the feedback terminal of the control chip 522.

[0062] Specifically, when the signal feedback loop is on, the feedback terminal of the control chip 522 can receive a high-level signal sent by the output terminal of the control chip 522; when the signal feedback loop is off, the feedback terminal of the control chip 522 cannot receive a high-level signal sent by the output terminal of the control chip 522. The switching state of the third relay 700 is affected by the power supply state of the external power supply 200. For example, when the external power supply 200 is on, the third relay 700 is closed, and the signal feedback branch is on. When the external power supply 200 is off, the third relay 700 is off, and the signal feedback loop is off.

[0063] It should be noted that the control terminal of the third relay 700 can be connected to the feedback terminal of the energy storage power supply 100. When the external power supply 200 is in a conducting state, the feedback terminal of the energy storage power supply 100 controls the control terminal of the third relay 700 to be energized, and the fifth and sixth switch contacts are connected. When the external power supply 200 is in a disconnected state, the feedback terminal of the energy storage power supply 100 controls the control terminal of the third relay 700 to be de-energized, and the fifth and sixth switch contacts are disconnected.

[0064] Specifically, the third relay 700 can also be the second relay 510. The second relay 510 includes a first switch terminal and a third switch terminal. The first switch terminal is connected in parallel with the first branch 521, and the third switch terminal forms a signal feedback loop with the control chip 522. When the external power supply 200 is in the off state, the first switch terminal and the third switch terminal are disconnected at the same time, and the signal feedback loop is broken.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] The above is a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present invention.

Claims

1. An energy storage output control system, characterized in that, The energy storage output control system includes a first relay, an energy storage power supply, a control branch, and a load port. The energy storage power supply is connected to the load port through the first relay. The control terminal of the first relay is connected to the control branch. The control branch includes a second relay. The switching state of the second relay is affected by the power supply state of the external power supply, so that the control branch controls the first relay to disconnect when the duration of the external power supply disconnection reaches a preset power outage duration.

2. The energy storage output control system according to claim 1, characterized in that, The second relay is connected to the energy storage power supply to form a current loop, and the control terminal of the first relay is connected to the current loop.

3. The energy storage output control system according to claim 2, characterized in that, When the external power supply is in a disconnected state for a preset power outage duration, the second relay is in a closed state, so that the first relay is energized and disconnected.

4. The energy storage output control system according to claim 2, characterized in that, When the external power supply is on, the second relay is off, so that the first relay is de-energized and closed.

5. The energy storage output control system according to claim 1, characterized in that, The control branch also includes a power management module, which includes a control chip and a first branch. The control chip is used to control the on / off state of the first branch according to the power supply status of the external power supply. The first branch is connected in parallel with the second relay, and a first connection point is provided between the first branch and the second relay. The energy storage power supply is connected to the first connection point, and the control terminal of the first relay is connected between the first connection point and the energy storage power supply.

6. The energy storage output control system according to claim 5, characterized in that, The energy storage output control system also includes a third relay, which forms a signal feedback loop with the control chip. The third relay is used to control the conduction and disconnection of the signal feedback loop, and the switching state of the third relay is affected by the power supply state of the external power source.

7. The energy storage output control system according to claim 6, characterized in that, When the external power supply is on, the third relay is closed, and the signal feedback branch is activated.

8. The energy storage output control system according to claim 6, characterized in that, When the external power supply is disconnected, the third relay is disconnected, and the signal feedback loop is disconnected.

9. The energy storage output control system according to claim 6, characterized in that, When the external power supply is disconnected, the second relay is in the off state, and the control chip counts the power outage duration; wherein, when the duration of the external power supply disconnection reaches the preset power outage duration, the control chip disconnects the first branch to de-energize and disconnect the first relay.

10. The energy storage output control system according to claim 5, characterized in that, When the external power supply is on, the second relay is closed to maintain the first relay in the closed state.

11. The energy storage output control system according to claim 5, characterized in that, The control chip is used for: When the second relay is disconnected, a power failure alarm signal is issued.

12. The energy storage output control system according to claim 5, characterized in that, The control chip is also used for: The power level of the energy storage power source is obtained, and when the power level is less than a preset power threshold, a power alarm signal is issued.

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