A power supply control device for energy storage systems

Abstract

This application provides a power supply control device for an energy storage system. The device includes: an energy management power supply module with a power input terminal electrically connected to an AC power source and a power output terminal electrically connected to the energy management unit of the energy storage system; and a battery management power supply module with a first power input terminal electrically connected to the power output terminal of the energy management power supply module, a second power input terminal electrically connected to a battery, and power output terminals electrically connected to both the battery management unit and the energy management unit of the energy storage system. This device supplies power to the battery management unit and the energy management unit via the battery when the power output terminal of the energy management power supply module stops supplying power. The technical solution of this application can reduce the risk of power failure in the energy management unit and battery management unit of the energy storage system, and improve the operational stability of the energy storage system.

Description

Technical Field

[0001] This application relates to the field of power supply control technology, and more specifically, to a power supply control device applied to an energy storage system. Background Technology

[0002] With the continuous development of science and technology, configuring energy management units to monitor the overall operating status of energy storage systems and battery management units to monitor the operating status of energy storage batteries in energy storage systems has become one of the widely adopted methods for optimizing energy distribution, improving energy storage efficiency, and ensuring the safe and stable operation of energy storage systems.

[0003] In related technologies, energy management units and battery management units typically employ traditional power supply methods, directly connecting to an AC power source for normal operation. If the AC power supply fails due to malfunction, maintenance, or other reasons, the energy management unit and battery management unit will immediately cease operation, affecting the normal monitoring and management of the energy storage system, leading to a series of chain reactions, resulting in economic losses and even safety risks.

[0004] Therefore, how to reduce the risk of power failure of the energy management unit and battery management unit in the energy storage system and improve the operational stability of the energy storage system has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] To address the aforementioned technical problems, embodiments of this application provide a power supply control device for energy storage systems.

[0006] According to one aspect of the embodiments of this application, a power supply control device for an energy storage system is provided, comprising: an energy management power supply module, wherein a power supply input terminal is electrically connected to an AC power source and a power supply output terminal is electrically connected to an energy management unit of the energy storage system; and a battery management power supply module, wherein a first power supply input terminal is electrically connected to a power supply output terminal of the energy management power supply module, a second power supply input terminal is electrically connected to a battery, and a power supply output terminal is electrically connected to both the battery management unit and the energy management unit of the energy storage system, for supplying power to the battery management unit and the energy management unit based on the battery when the power supply output terminal of the energy management power supply module stops supplying power.

[0007] In some embodiments of this application, based on the aforementioned scheme, the battery management power supply module includes a first power switching switch; the first battery power input terminal of the first power switching switch is electrically connected to the power output terminal of the energy management power supply module, the second battery power input terminal is electrically connected to the battery, and the battery power output terminal is electrically connected to the battery management unit and the energy management unit respectively; after the power output terminal of the energy management power supply module stops supplying power, the second battery power input terminal and the battery power output terminal are connected, and the first battery power input terminal and the battery power output terminal are disconnected; after the power output terminal of the energy management power supply module supplies power normally, the first battery power input terminal and the battery power output terminal are connected, and the second battery power input terminal and the battery power output terminal are disconnected.

[0008] In some embodiments of this application, based on the aforementioned scheme, the energy storage system includes multiple battery management units; the power supply control device includes multiple battery management power supply modules, wherein the multiple battery management power supply modules correspond one-to-one with the multiple battery management units; the first power supply input terminal of each battery management power supply module is electrically connected to the power supply output terminal of the energy management power supply module, and the power supply output terminal is electrically connected to the corresponding battery management unit and the energy management unit.

[0009] In some embodiments of this application, based on the aforementioned scheme, the energy management power supply module includes a second power switching switch and a standby power supply; the first energy power input terminal of the second power switching switch is electrically connected to the AC power supply, the second energy power input terminal is electrically connected to the output terminal of the standby power supply, and the energy power output terminal is electrically connected to the first power input terminals of the energy management unit and the battery management power supply module, respectively; after the AC power supply stops supplying power, the second energy power input terminal and the energy power output terminal are connected, and the first energy power input terminal and the energy power output terminal are disconnected; after the AC power supply is normally supplied, the first energy power input terminal and the energy power output terminal are connected, and the second energy power input terminal and the energy power output terminal are disconnected.

[0010] In some embodiments of this application, based on the aforementioned scheme, the energy storage system includes multiple energy management units; the power supply control device includes multiple energy management power supply modules, wherein the multiple energy management power supply modules correspond one-to-one with the multiple energy management units; the energy power output terminal of the second power switching switch in each energy management power supply module is electrically connected to the corresponding energy management unit and the input terminal of the standby power supply in the next adjacent energy management power supply module.

[0011] In some embodiments of this application, based on the aforementioned scheme, the power supply control device further includes a first rectifier; the input terminal of the first rectifier is electrically connected to the power supply output terminal of the energy management power supply module, and the output terminal of the first rectifier is electrically connected to the energy management unit.

[0012] In some embodiments of this application, based on the foregoing scheme, the power supply control device further includes an uninterruptible power supply (UPS); the input terminal of the UPS is electrically connected to an AC power source, and the output terminal is electrically connected to the power input terminal of the energy management power supply module.

[0013] In some embodiments of this application, based on the foregoing scheme, the power supply control device further includes a second rectifier and a transformer; the input terminal of the second rectifier is electrically connected to the power supply output terminal of the energy management power supply module, and the output terminal of the second rectifier is electrically connected to the first power supply input terminal of the battery management power supply module; the input terminal of the transformer is electrically connected to the battery, and the output terminal of the transformer is electrically connected to the second power supply input terminal of the battery management power supply module.

[0014] In some embodiments of this application, based on the aforementioned scheme, the power output terminal of the battery management power supply module is electrically connected to the energy management unit via a diode.

[0015] In some embodiments of this application, based on the aforementioned scheme, the power supply control device further includes a first control switch and a second control switch; one end of the first control switch is electrically connected to the power supply output terminal of the energy management power supply module, and the other end is electrically connected to the first power supply input terminal of the battery management power supply module; one end of the second control switch is electrically connected to the output terminal of the battery, and the other end is electrically connected to the second power supply input terminal of the battery management power supply module.

[0016] In the technical solution of this application embodiment, when the AC power supply is normal, the power supply control device prioritizes supplying power to the energy management unit and the battery management power supply module based on the AC power supply through the energy management power supply module, so that the energy management unit and the battery management unit in the energy storage system can be powered and operated normally; after the AC power supply stops, the battery management power supply module can also switch the battery as the power supply to supply power to the battery management unit and the energy management unit, so as to reduce the risk of power failure of the energy management unit and the battery management unit in the energy storage system and improve the operational stability of the energy storage system. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0018] Figure 1 This is a schematic diagram illustrating the structure of a power supply control device applied to an energy storage system, as shown in an exemplary embodiment of this application.

[0019] Figure 2This is a schematic diagram of the structure of the first rectifier in the power supply control device, as shown in an exemplary embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the structure of an uninterruptible power supply in a power supply control device, as shown in another exemplary embodiment of this application.

[0021] Figure 4 This is a schematic diagram of the structure of the battery management power supply module in a power supply control device, as shown in an exemplary embodiment of this application.

[0022] Figure 5 This is a schematic diagram of the structure of the battery management power supply module in a power supply control device, as shown in another exemplary embodiment of this application;

[0023] Figure 6 This is a schematic diagram illustrating the connection of the second rectifier in a power supply control device according to an exemplary embodiment of this application;

[0024] Figure 7 This is a schematic diagram of the transformer connection in a power supply control device, shown in another exemplary embodiment of this application;

[0025] Figure 8 This is a schematic diagram illustrating the connection of a battery management power supply module, as shown in an exemplary embodiment of this application;

[0026] Figure 9 This is a schematic diagram illustrating the structure of the battery management power supply module in a power supply control device, as shown in another exemplary embodiment of this application.

[0027] Figure 10 This is a schematic diagram illustrating the connection between the first control switch and the second control switch in a power supply control device, as shown in an exemplary embodiment of this application.

[0028] Figure 11 This is a schematic diagram illustrating the structure of an energy management power supply module in a power supply control device, as shown in an exemplary embodiment of this application.

[0029] Figure 12 This is a schematic diagram of the structure of the energy management power supply module in a power supply control device, as shown in another exemplary embodiment of this application. Detailed Implementation

[0030] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0031] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0032] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0033] It should be noted that "multiple" in this article refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0034] Figure 1 This is a schematic diagram of the structure of a power supply control device applied to an energy storage system, provided by an exemplary embodiment of this application.

[0035] like Figure 1 As shown, the power supply control device 100 may include an energy management power supply module 101. The power supply input terminal of the energy management power supply module 101 is electrically connected to the AC power supply 102, and the power supply output terminal is electrically connected to the energy management unit 103 of the energy storage system.

[0036] The energy management unit 103 monitors the status of the power stored in the energy storage system and controls the output of the stored power according to the discharge demand, thereby improving the utilization efficiency of the power stored in the energy storage system. The energy management unit includes, but is not limited to, EMS (Energy Management System) and BAU (Battery Array Unit).

[0037] based on Figure 1 If the AC power supply 102 is supplying power normally, the energy management power supply module 101 shown can supply power to the energy management unit 103 through the AC power supply 102, so that the energy management unit 103 can be powered and operated normally.

[0038] In some embodiments of this application, considering that the conventional energy management unit 103 typically operates in a DC environment, the power supply control device 100 may further include a first rectifier for converting AC power to DC power. (See also...) Figure 2 As shown, the input terminal of the first rectifier 201 is electrically connected to the power output terminal of the energy management power supply module 101, and the output terminal of the first rectifier 201 is electrically connected to the energy management unit 103. When power is supplied to the power output terminal of the energy management power supply module 101, the AC power can be converted to DC power by the first rectifier 201 before power is supplied to the energy management unit 103, so that the energy management unit 103 can operate in a DC environment.

[0039] In some embodiments of this application, considering that the AC power output by the AC power supply contains certain harmonic pollution, which can not only interfere with the normal operation of electrical equipment but may also cause direct damage to the equipment, the power supply control device 100 may further include an uninterruptible power supply (UPS). (Refer to...) Figure 3 As shown, the input terminal of the uninterruptible power supply 301 is electrically connected to the AC power supply 102, and the output terminal of the uninterruptible power supply 301 is electrically connected to the power input terminal of the energy management power supply module 101. This allows the uninterruptible power supply 301 to filter out harmonics in the AC power output from the AC power supply 102, thereby reducing the impact of harmonic pollution on the energy management unit 103 and ensuring its normal operation. Simultaneously, after the AC power supply 102 stops supplying power, the uninterruptible power supply 301 can immediately switch to battery power mode, ensuring that the electrically connected energy management unit 103 does not immediately stop operating after the AC power supply 102 is de-energized. This reduces the risk of power failure for the energy management unit 103 in the energy storage system and improves the operational stability of the energy storage system.

[0040] Continue to refer to Figure 1 As shown, the power supply control device 100 may include a battery management power supply module 104. The first power supply input terminal of the battery management power supply module 104 is electrically connected to the power supply output terminal of the energy management power supply module 101, the second power supply input terminal is electrically connected to the battery 105, and the power supply output terminal is electrically connected to the battery management unit 106 and the energy management unit 103 of the energy storage system, respectively. This allows the battery management unit 106 and the energy management unit 103 to be powered by the battery 105 when the power supply output terminal of the energy management power supply module 101 stops supplying power.

[0041] The battery management unit 106 monitors the status of the energy storage batteries used to store electrical energy in the energy storage system, and controls the output of the energy storage batteries according to their status and discharge requirements, so as to ensure that the energy storage batteries efficiently and safely output the stored energy, thereby improving the service life of the energy storage batteries. The battery management unit includes, but is not limited to, BMS (Battery Management System) and BCU (Battery Cluster Unit).

[0042] based on Figure 1 If the power output terminal of the power management power supply module 101 is supplying power normally, the battery management power supply module 104 can supply power to the battery management unit 106 under the power provided by the power output terminal of the power management power supply module 101, so that the battery management unit 106 can be powered on and operate normally.

[0043] If the power supply output of the energy management power supply module 101 stops supplying power, the battery management power supply module 104 can still supply power to the battery management unit 106 and the energy management unit 103 based on the battery 105, so as to reduce the risk of power failure of the energy management unit 103 and the battery management unit 106 in the energy storage system and further improve the operational stability of the energy storage system.

[0044] To enable the battery management power supply module 104 to supply power to the battery management unit 106 and the energy management unit 103 via the battery 105 after the power supply output of the energy management power supply module 101 has stopped, in one example, the battery management power supply module 104 may include a first power switching switch. (Refer to...) Figure 4 As shown, the first battery power input terminal of the first power switch 401 is electrically connected to the power output terminal of the energy management power supply module 101, the second battery power input terminal is electrically connected to the battery 105, and the battery power output terminal is electrically connected to the battery management unit 106 and the energy management unit 103, respectively. That is, the first battery power input terminal of the first power switch 401 serves as the first power input terminal of the battery management power supply module 104, the second battery power input terminal serves as the second power input terminal of the battery management power supply module 104, and the battery power output terminal serves as the power output terminal of the battery management power supply module 104.

[0045] In this configuration, after the power supply output of the energy management power supply module 101 stops supplying power, the second battery power input terminal and the battery power output terminal are connected, while the first battery power input terminal and the battery power output terminal are disconnected. This allows the battery management power supply module 104 to use the battery 105 as a backup power source, and to supply power to the energy management unit 103 and the battery management unit 106 in the energy storage system only when the power supply output of the energy management power supply module 101 stops supplying power. This achieves the purpose of the battery management power supply module 104 supplying power to the battery management unit 106 and the energy management unit 103 based on the battery 105 after the power supply output of the energy management power supply module 101 stops supplying power.

[0046] Meanwhile, after the power supply output terminal of the energy management power supply module 101 is powered normally, the first battery power input terminal and the battery power output terminal are connected, and the second battery power input terminal and the battery power output terminal are disconnected. This allows the first power switching switch 401 to resume power supply to the battery management unit 106 under the power provided by the power supply output terminal of the energy management power supply module 101 after the power supply output terminal of the energy management power supply module 101 is restored. This disconnects the power supply path of the battery 105, thereby avoiding excessive use of the power stored in the battery 105 and improving the battery 105's resistance to power failure in the energy storage system.

[0047] Furthermore, when the power supply output terminal of the energy management power supply module 101 is supplying power normally, the battery management power supply module 104 prioritizes the power supplied by the power supply output terminal of the energy management power supply module 101 to supply power to the battery management unit 106, thereby avoiding the waste of electrical energy stored in the battery 105.

[0048] In another example, the battery management power supply module 104 may include a first power switch and a second power switch. (See also...) Figure 5 As shown, the input terminal of the first power switch 501 is electrically connected to the power output terminal of the energy management power supply module 101, and the output terminal of the first power switch 501 is electrically connected to the battery management unit 106 and the energy management unit 103, respectively. The input terminal of the second power switch 502 is electrically connected to the battery 105, and the output terminal of the second power switch 502 is electrically connected to the battery management unit 106 and the energy management unit 103, respectively. That is, the input terminal of the first power switch 501 serves as the first power input terminal of the battery management power supply module 104, the input terminal of the second power switch 502 serves as the first power input terminal of the battery management power supply module 104, and the output terminals of the first power switch 501 and the second power switch 502 together serve as the power output terminal of the battery management power supply module 104.

[0049] After the power supply output terminal of the energy management power supply module 101 stops supplying power, the first power switch 501 is turned off and the second power switch 502 is turned on, so that the battery management power supply module 104 can supply power to the battery management unit 106 and the energy management unit 103 based on the battery 105 after the power supply output terminal of the energy management power supply module 101 stops supplying power.

[0050] Meanwhile, after the power supply output terminal of the energy management power supply module 101 is powered normally, the second power switch 502 is turned off and the first power switch 501 is turned on, so that after the power supply output terminal of the energy management power supply module 101 is powered normally or restored, the battery management power supply module 104 can preferentially use the power provided by the power supply output terminal of the energy management power supply module 101 to power the battery management unit 106, and disconnect the power supply path of the battery 105 to avoid the waste of the electrical energy stored in the battery 105.

[0051] In some embodiments of this application, considering that the conventional battery management unit 106 typically operates in a DC environment, the power supply control device 100 may further include a second rectifier. (See also...) Figure 6 As shown, the input terminal of the second rectifier 601 is electrically connected to the power output terminal of the energy management power supply module 101, and the output terminal of the second rectifier 601 is electrically connected to the first power input terminal of the battery management power supply module 104. When the power output terminal of the energy management power supply module 101 supplies power, the battery management power supply module 104 can convert the AC power to DC power through the second rectifier 601 before supplying power to the battery management unit 106, so that the battery management unit 106 can operate in a DC environment.

[0052] If the DC voltage output by the battery 105 exceeds the operating voltage of the battery management unit 106, the probability of damage to the battery management unit 106 will increase significantly. Therefore, in some embodiments of this application, the power supply control device 100 may further include a transformer for adjusting the DC voltage value. (Refer to...) Figure 7 As shown, the input terminal of transformer 701 is electrically connected to battery 105, and the output terminal of transformer 701 is electrically connected to the second power supply input terminal of battery management power supply module 104. When battery 105 supplies power, battery management power supply module 104 can adjust the DC voltage value to the working voltage of battery management unit 106 through transformer 701 before supplying power to battery management unit 106, so as to ensure that battery management unit 106 can operate normally.

[0053] In some embodiments of this application, based on Figure 1As shown in the power supply control device, when the power output terminal of the energy management power supply module 101 supplies power to the energy management unit 103 and the battery management power supply module 104, since the power output terminal of the battery management power supply module 104 is simultaneously electrically connected to both the battery management unit 106 and the energy management unit 103, the power output terminal of the energy management power supply module 101, while supplying power to the energy management unit 103, can also directly supply power to the battery management unit 106 through the electrical connection between the energy management unit 103 and the battery management unit 106. This causes the power supply control of the battery management power supply module 104 to the battery management unit 106 to fail. Therefore, the power output terminal of the battery management power supply module 104 can be electrically connected to the energy management unit 103 via diode D1. The specific connection method can be found in [reference needed]. Figure 8 As shown, diode D1 is used to prevent the power output terminal of the power management power supply module 101 from supplying power to the battery management unit 106, thereby avoiding the failure of the power supply control of the battery management power supply module 104 to the battery management unit 106.

[0054] Figure 9 This is a schematic diagram of the structure of a power supply control device applied to an energy storage system, provided in an exemplary embodiment of this application.

[0055] like Figure 9 As shown, when the energy storage system includes multiple battery management units 106, the power supply control device 100 may include multiple battery management power supply modules 104, wherein the multiple battery management power supply modules 104 correspond one-to-one with the multiple battery management units 106.

[0056] Specifically, the first power input terminal of each battery management power supply module 104 is electrically connected to the power output terminal of the energy management power supply module 101, and the power output terminal is electrically connected to the corresponding battery management unit 106 and energy management unit 103. This allows energy storage systems with multiple battery management units 106 to be connected to the power supply path of the AC power supply 102 through the energy management power supply module 101, facilitating maintenance personnel to maintain the energy storage system. At the same time, it eliminates the need for the AC power supply 102 to have multiple output ports connected to multiple battery management power supply modules 104 one by one, thereby improving the convenience of energy storage system configuration.

[0057] In addition, since each of the multiple battery management power supply modules 104 is equipped with a battery 105, when the power supply output terminal of the energy management power supply module 101 stops supplying power, the battery 105 in each battery management power supply module 104 can supply power to the energy management unit 103, thereby further reducing the risk of power failure of the energy management unit 103 in the energy storage system.

[0058] Figure 10This is a schematic diagram of the structure of a power supply control device applied to an energy storage system, provided in an exemplary embodiment of this application.

[0059] like Figure 10 As shown, the power supply control device 100 may include a first control switch S1 and a second control switch S2.

[0060] Specifically, one end of the first control switch S1 is electrically connected to the power output terminal of the energy management power supply module 101, and the other end is electrically connected to the first power input terminal of the battery management power supply module 104; one end of the second control switch S2 is electrically connected to the output terminal of the battery 105, and the other end is electrically connected to the second power input terminal of the battery management power supply module 104.

[0061] In some embodiments of this application, the first control switch S1 and the second control switch S2 can be manual switches, so that maintenance personnel can actively disconnect the power supplied by the energy management power supply module 101 to the battery management power supply module 104 or disconnect the power supplied by the battery 105 to the battery management power supply module 104, thereby facilitating maintenance personnel to perform maintenance and repair on the various components in the battery management power supply module 104.

[0062] In some embodiments of this application, the first control switch S1 and the second control switch S2 can be voltage-type normally closed control switches. Specifically, the voltage input terminal of the first control switch S1 can be electrically connected to the power output terminal of the energy management power supply module 101, and the voltage input terminal of the second control switch S2 can be electrically connected to the battery 105.

[0063] Specifically, after the voltage value of the power supply provided by the power supply output terminal of the energy management power supply module 101 reaches the preset voltage value, the first control switch S1 is turned on to ensure that the power supply provided by the power supply output terminal of the energy management power supply module 101 can drive the battery management unit 106 to operate normally.

[0064] After the voltage value of the power supply provided by the power supply output terminal of the energy management power supply module 101 is lower than the preset voltage value, the first control switch S1 is turned off, so that the battery management power supply module 104 switches the battery 105 to supply power to the battery management unit 106 in a timely manner, so as to ensure that the battery management unit 106 can operate normally.

[0065] If the voltage provided by the battery 105 is lower than the preset voltage value, it indicates that the current voltage of the battery 105 is too low and the battery 105 should not continue to discharge. As a result, the second control switch S2 is turned off to ensure that the battery 105 is not easily damaged.

[0066] Figure 11 This is a schematic diagram of the structure of a power supply control device applied to an energy storage system, provided in an exemplary embodiment of this application.

[0067] like Figure 11 As shown, the energy management power supply module 101 may include a second power switching switch 801 and a standby power supply 802. Specifically, the first energy power input terminal of the second power switching switch 801 is electrically connected to the AC power supply 102, the second energy power input terminal is electrically connected to the output terminal of the standby power supply 802, and the energy power output terminal is electrically connected to the first power input terminals of the energy management unit 103 and the battery management power supply module 104, respectively. That is, the first energy power input terminal of the second power switching switch 801 serves as the power input terminal of the energy management power supply module 101, and the energy power output terminal serves as the power output terminal of the energy management power supply module 101.

[0068] In this configuration, after the AC power supply 102 stops supplying power, the second energy power input terminal and the energy power output terminal are connected, while the first energy power input terminal and the energy power output terminal are disconnected. This allows the energy management power supply module 101 to use the standby power supply 802 as a backup power source, and to supply power to the energy management unit 103 and the battery management power supply module 104 only when the AC power supply 102 stops supplying power. This ensures that the energy management power supply module 101 can still supply power to the energy management unit 103 and the battery management power supply module 104 based on the standby power supply 802 after the AC power supply 102 stops supplying power, further reducing the risk of power failure for the energy management unit 103 and the battery management unit 106 in the energy storage system.

[0069] Meanwhile, after the AC power supply 102 is powered normally, the first energy power input terminal and the energy power output terminal are connected, and the second energy power input terminal and the energy power output terminal are disconnected. This allows the second power switching switch 801 to resume power supply to the energy management unit 103 and the battery management power supply module 104 through the AC power supply 102 after the AC power supply 102 is restored. This disconnects the power supply path of the standby power supply 802, thereby avoiding excessive use of the energy stored in the standby power supply 802 and improving the standby power supply 802's resistance to power outages in the energy storage system.

[0070] Furthermore, when the AC power supply 102 is supplying power normally, the energy management power supply module 101 prioritizes using the power provided by the AC power supply 102 to supply power to the battery management unit 106, thus avoiding the waste of the power stored in the standby power supply 802.

[0071] Figure 12 This is a schematic diagram of the structure of a power supply control device applied to an energy storage system, provided in an exemplary embodiment of this application.

[0072] like Figure 12As shown, when the energy storage system includes multiple energy management units 103, the power supply control device 100 may include multiple energy management power supply modules 101, wherein the multiple energy management power supply modules 101 correspond one-to-one with the multiple energy management units 103.

[0073] Specifically, the energy output terminal of the second power switching switch 801 in each energy management power supply module 101 is electrically connected to the corresponding energy management unit 103 and the input terminal of the standby power supply 802 in the next adjacent energy management power supply module 101. Thus, when the AC power supply 102 stops supplying power, during the process of each energy management power supply module 101 supplying power to its corresponding energy management unit 103 and battery management power supply module 104 based on its own standby power supply 802, the energy stored in the standby power supply 802 of any energy management power supply module 101 is consumed. Afterwards, it can also obtain power from the standby power supply 802 in the adjacent energy management power supply module 101 to power its own energy management unit 103 and battery management unit 106 until the energy stored in the standby power supply 802 of each energy management power supply module 101 in the power supply control module is exhausted. Only then will the energy management unit 103 and battery management unit 106 in the energy storage system stop operating, further reducing the risk of power failure of the energy management unit 103 and battery management unit 106 in the energy storage system and greatly improving the operational stability of the energy storage system.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0075] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A power supply control device applied to an energy storage system, characterized by, The power supply control device includes: The energy management power supply module has its power input terminal electrically connected to an AC power source and its power output terminal electrically connected to the energy management unit of the energy storage system. The battery management power supply module has a first power supply input terminal electrically connected to the power supply output terminal of the energy management power supply module, a second power supply input terminal electrically connected to the battery, and a power supply output terminal electrically connected to the battery management unit and the energy management unit of the energy storage system, respectively. It is used to supply power to the battery management unit and the energy management unit based on the battery when the power supply output terminal of the energy management power supply module stops supplying power.

2. The power supply control device according to claim 1, characterized in that, The battery management power supply module includes a first power switching switch; The first battery power input terminal of the first power switching switch is electrically connected to the power output terminal of the energy management power supply module, the second battery power input terminal is electrically connected to the storage battery, and the battery power output terminal is electrically connected to the battery management unit and the energy management unit respectively. After the power supply output terminal of the energy management power supply module stops supplying power, the second battery power input terminal is connected to the battery power output terminal, and the first battery power input terminal is disconnected from the battery power output terminal. After the power supply output terminal of the energy management power supply module is powered normally, the first battery power input terminal is connected to the battery power output terminal, and the second battery power input terminal is disconnected from the battery power output terminal.

3. The power supply control device according to claim 1, characterized in that, The energy storage system includes multiple battery management units; The power supply control device includes a plurality of battery management power supply modules, wherein each of the plurality of battery management power supply modules corresponds one-to-one with a plurality of battery management units; Each of the battery management power supply modules has its first power supply input terminal electrically connected to the power supply output terminal of the energy management power supply module, and the power supply output terminal is electrically connected to the corresponding battery management unit and the energy management unit.

4. The power supply control device according to claim 1, characterized in that, The energy management power supply module includes a second power switching switch and a standby power supply; The first energy power input terminal of the second power switching switch is electrically connected to the AC power supply, the second energy power input terminal is electrically connected to the output terminal of the standby power supply, and the energy power output terminal is electrically connected to the first power input terminal of the energy management unit and the battery management power supply module, respectively. After the AC power supply stops, the second energy power input terminal and the energy power output terminal are connected, and the first energy power input terminal and the energy power output terminal are disconnected. After the AC power supply is in normal operation, the first energy power input terminal and the energy power output terminal are connected, and the second energy power input terminal and the energy power output terminal are disconnected.

5. The power supply control device according to claim 4, characterized in that, The energy storage system includes multiple energy management units; The power supply control device includes a plurality of energy management power supply modules, wherein the plurality of energy management power supply modules correspond one-to-one with the plurality of energy management units; In each of the energy management power supply modules, the energy output terminal of the second power switching switch is electrically connected to the corresponding energy management unit and the input terminal of the standby power supply in the next adjacent energy management power supply module.

6. The power supply control device according to claim 1, characterized in that, The power supply control device also includes a first rectifier; The input terminal of the first rectifier is electrically connected to the power output terminal of the energy management power supply module, and the output terminal of the first rectifier is electrically connected to the energy management unit.

7. The power supply control device according to claim 1, characterized in that, The power supply control device also includes an uninterruptible power supply; The input terminal of the uninterruptible power supply is electrically connected to the AC power supply, and the output terminal is electrically connected to the power input terminal of the energy management power supply module.

8. The power supply control device according to claim 1, characterized in that, The power supply control device also includes a second rectifier and a transformer; The input terminal of the second rectifier is electrically connected to the power output terminal of the energy management power supply module, and the output terminal of the second rectifier is electrically connected to the first power input terminal of the battery management power supply module. The input terminal of the transformer is electrically connected to the battery, and the output terminal of the transformer is electrically connected to the second power supply input terminal of the battery management power supply module.

9. The power supply control device according to claim 1, characterized in that, The power output terminal of the battery management power supply module is electrically connected to the energy management unit via a diode.

10. The power supply control device according to claim 1, characterized in that, The power supply control device also includes a first control switch and a second control switch. One end of the first control switch is electrically connected to the power output terminal of the energy management power supply module, and the other end is electrically connected to the first power input terminal of the battery management power supply module. One end of the second control switch is electrically connected to the output terminal of the battery, and the other end is electrically connected to the second power input terminal of the battery management power supply module.

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