Power supply circuit and energy storage system

Abstract

The present application relates to the field of control of energy storage systems, and provides a power supply circuit and an energy storage system. The power supply circuit comprises: an acquisition module, a control module, a first power supply module, and a second power supply module; a first end of the acquisition module is configured to be connected to a power grid, a second end of the acquisition module is connected to a first input end of the control module, and the acquisition module is used for acquiring the ambient temperature of the power supply circuit; an output end of the control module is connected to a first input end of the first power supply module and a first input end of the second power supply module; both an output end of the first power supply module and an output end of the second power supply module are connected to an external circuit; and the control module is used for sending a control signal for interlocking to the first power supply module and the second power supply module on the basis of the ambient temperature acquired by the acquisition module. The present application can avoid the situation in which a UPS device cannot be started when the temperature is excessively high or excessively low, thereby ensuring normal and stable operation of the energy storage system.

Description

Power supply circuit and energy storage system

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202422077516.8, filed on August 26, 2024, entitled "Power Supply Circuit and Energy Storage System", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of energy storage system control, and more specifically, to a power supply circuit and an energy storage system. Background Technology

[0004] An uninterruptible power supply (UPS) is a power supply device that provides a continuous, stable, and uninterrupted power supply. It is mainly used to provide power support for critical equipment such as computers, servers, and network equipment for a period of time when the mains power fails, through internal energy storage devices such as batteries, to ensure that these devices can operate normally and avoid problems such as data loss or equipment damage caused by sudden power outages.

[0005] However, UPS has high requirements for ambient temperature during startup. It cannot start when the ambient temperature is too high or too low. When the UPS fails to start, the control equipment powered by the UPS cannot be used. Therefore, the existing UPS startup method is limited by ambient temperature during UPS startup, which is not flexible enough and difficult to apply in various scenarios.

[0006] Summary of the Invention

[0007] The purpose of this application is to provide a power supply circuit and an energy storage system that can prevent UPS equipment from failing to start when the temperature is too high or too low, thereby ensuring the normal and stable operation of the energy storage system and increasing the application scenarios of the energy storage system.

[0008] In a first aspect, this application provides a power supply circuit, which includes: a data acquisition module, a control module, a first power supply module, and a second power supply module;

[0009] The first end of the acquisition module is used to connect to the power grid, and the second end of the acquisition module is connected to the first input end of the control module. The acquisition module is used to acquire the ambient temperature of the power supply circuit.

[0010] The output terminal of the control module is connected to the first input terminal of the first power supply module and the first input terminal of the second power supply module.

[0011] Both the second input terminal of the first power supply module and the second input terminal of the second power supply module are used to connect to the power grid, and both the output terminal of the first power supply module and the output terminal of the second power supply module are connected to an external circuit.

[0012] The control module is used to send interlocking control signals to the first power supply module and the second power supply module based on the ambient temperature collected by the acquisition module.

[0013] In one possible implementation, the second input terminal of the control module is used to connect to the power grid.

[0014] In one possible implementation, the acquisition module includes: a temperature and humidity sensor and a heat dissipation module;

[0015] The first end of the temperature and humidity sensor is used to connect to the neutral wire of the power grid, the second end of the temperature and humidity sensor is connected to the first end of the heat dissipation module, and the temperature and humidity sensor is also communicatively connected to the first input end of the control module.

[0016] The second end of the heat dissipation module is used to connect to the live wire of the power grid.

[0017] In one possible implementation, the acquisition module further includes: a first switch;

[0018] The first terminal of the first switch is used to connect to the live wire of the power grid, the second terminal of the first switch is connected to the second terminal of the heat dissipation module, the third terminal of the first switch is used to connect to the neutral wire of the power grid, and the fourth terminal of the first switch is connected to the first terminal of the temperature and humidity sensor.

[0019] In one possible implementation, the acquisition module further includes: a first current transformer and a second current transformer;

[0020] One end of the first current transformer is connected to the second end of the first switch, and the other end of the first current transformer is connected to the second end of the heat dissipation module.

[0021] One end of the second current transformer is connected to the fourth end of the first switch, and the other end of the second current transformer is connected to the first end of the temperature and humidity sensor.

[0022] In one possible implementation, the control module includes: a control chip;

[0023] The first input terminal of the control chip is connected to the acquisition module, and the second input terminal of the control chip is used to connect to the power grid;

[0024] The output terminal of the control chip is connected to the first input terminal of the first power supply module and the first input terminal of the second power supply module.

[0025] In one possible implementation, the control module further includes: a second switch;

[0026] The first end of the second switch is used to connect to the live wire of the power grid, the second end and the fourth end of the second switch are connected to the second input end of the control chip, and the third end of the second switch is used to connect to the neutral wire of the power grid.

[0027] In one possible implementation, the control module further includes: a third current transformer and a fourth current transformer;

[0028] One end of the third current transformer is connected to the second terminal of the second switch, and the other end of the third current transformer is connected to the second input terminal of the control chip.

[0029] One end of the fourth current transformer is connected to the fourth terminal of the second switch, and the other end of the fourth current transformer is connected to the second input terminal of the control chip.

[0030] In one possible implementation, the first power supply module includes: a first switching unit and a power supply module;

[0031] The first input terminal of the first switching unit is connected to the output terminal of the control module, the second input terminal of the first switching unit is used to connect to the power grid, and the output terminal of the first switching unit is connected to the input terminal of the power module.

[0032] The output terminal of the power module is connected to the external circuit and the output terminal of the second power supply module.

[0033] In one possible implementation, the first switching unit includes: a third switch;

[0034] The first end of the third switch is used to connect to the live wire of the power grid, the second end and the fourth end of the third switch are connected to the input end of the power module, the third end of the third switch is used to connect to the neutral wire of the power grid, and the third switch is also connected to the output end of the control module.

[0035] In one possible implementation, the power module is: an uninterruptible power supply system;

[0036] The input terminal of the uninterruptible power supply system is connected to the second terminal and the fourth terminal of the third switch, and the output terminal of the uninterruptible power supply system is connected to the external circuit.

[0037] In one possible implementation, the first switching unit further includes: a fifth current transformer and a sixth current transformer;

[0038] One end of the fifth current transformer is connected to the second end of the third switch, and the other end of the fifth current transformer is connected to the input end of the power supply module.

[0039] One end of the sixth current transformer is connected to the fourth terminal of the third switch, and the other end of the sixth current transformer is connected to the input terminal of the power module.

[0040] In one possible implementation, the second power supply module includes: a second switching unit;

[0041] The first input terminal of the second switching unit is connected to the output terminal of the control module, the second input terminal of the second switching unit is used to connect to the power grid, and the output terminal of the second switching unit is connected to the external circuit and the output terminal of the first power supply module.

[0042] In one possible implementation, the second switching unit includes a fourth switch;

[0043] The first end of the fourth switch is used to connect to the live wire of the power grid, the second end and the fourth end of the fourth switch are connected to the external circuit and the output end of the first power supply module, the third end of the fourth switch is used to connect to the neutral wire of the power grid, and the fourth switch is also connected to the output end of the control module.

[0044] In one possible implementation, the second switching unit further includes: a seventh current transformer and an eighth current transformer;

[0045] One end of the seventh current transformer is connected to the second end of the fourth switch, and the other end of the seventh current transformer is connected to the external circuit.

[0046] One end of the eighth current transformer is connected to the fourth terminal of the fourth switch, and the other end of the eighth current transformer is connected to the external circuit.

[0047] Secondly, this application also provides an energy storage system, which includes the power supply circuit and external circuit described in the first aspect above.

[0048] The beneficial effects of the power supply circuit provided in this application are: by setting a data acquisition module in the power supply circuit, the ambient temperature of the power supply module can be acquired and sent to the control module, so that the control module can process the ambient temperature and generate a control signal for interlocking power supply to the first power supply module and the second power supply module, thereby avoiding the situation where the UPS equipment cannot start when the temperature is too high or too low, thus ensuring the normal and stable operation of the energy storage system and increasing the application scenarios of the energy storage system. Attached Figure Description

[0049] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 is a schematic diagram of a power supply circuit provided in an embodiment of this application;

[0051] Figure 2 is a schematic diagram of another power supply circuit provided in an embodiment of this application;

[0052] Figure 3 is a schematic diagram of a data acquisition module in a power supply circuit provided in an embodiment of this application;

[0053] Figure 4 is a schematic diagram of another structure of the acquisition module in the power supply circuit provided in the embodiment of this application;

[0054] Figure 5 is a schematic diagram of another structure of the acquisition module in the power supply circuit provided in the embodiment of this application;

[0055] Figure 6 is a schematic diagram of a control module in a power supply circuit provided in an embodiment of this application;

[0056] Figure 7 is a schematic diagram of another structure of the control module in the power supply circuit provided in the embodiment of this application;

[0057] Figure 8 is a schematic diagram of another structure of the control module in the power supply circuit provided in the embodiment of this application;

[0058] Figure 9 is a schematic diagram of a first power supply module in a power supply circuit provided in an embodiment of this application;

[0059] Figure 10 is a schematic diagram of another structure of the first power supply module in the power supply circuit provided in the embodiment of this application;

[0060] Figure 11 is a schematic diagram of another structure of the first power supply module in the power supply circuit provided in the embodiment of this application;

[0061] Figure 12 is a schematic diagram of another structure of the first power supply module in the power supply circuit provided in the embodiment of this application;

[0062] Figure 13 is a schematic diagram of a second power supply module in a power supply circuit provided in an embodiment of this application;

[0063] Figure 14 is a schematic diagram of an energy storage system provided in an embodiment of this application.

[0064] Icons: Temperature and humidity sensor - TH; Heat dissipation module - FAN; First switch - K1; First current transformer - CT1; Second current transformer - CT2; Control chip - M; Second switch - K2; Third current transformer - CT3; Fourth current transformer - CT4; Third switch - K3; Uninterruptible power supply system - UPS; Fifth current transformer - CT5; Sixth current transformer - CT6; Fourth switch - K4; Seventh current transformer - CT7; Eighth current transformer - CT8. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0066] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0067] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0068] In the description of this application, it should be understood that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the equipment or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0069] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0070] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0071] Existing UPS startup methods are limited by ambient temperature during UPS startup, making them inflexible and difficult to apply in various scenarios.

[0072] Based on the above-mentioned problems, this application proposes a power supply circuit that can prevent UPS equipment from failing to start when the temperature is too high or too low, thereby ensuring the normal and stable operation of the energy storage system and increasing the application scenarios of the energy storage system.

[0073] Figure 1 is a schematic diagram of a power supply circuit provided in an embodiment of this application. Referring to Figure 1, this embodiment provides a power supply circuit, which includes: a data acquisition module, a control module, a first power supply module, and a second power supply module.

[0074] The first end of the acquisition module is used to connect to the power grid, and the second end of the acquisition module is connected to the first input end of the control module. The acquisition module is used to acquire the ambient temperature of the power supply circuit.

[0075] Optionally, the acquisition module is used to acquire the ambient temperature of the power supply circuit under the input power of the power grid.

[0076] The output terminal of the control module is connected to the first input terminal of the first power supply module and the first input terminal of the second power supply module.

[0077] Optionally, the control module is used to receive the ambient temperature of the power supply circuit collected by the acquisition module, process it, and output control signals to the first power supply module and the second power supply module.

[0078] The second input terminal of the first power supply module and the second input terminal of the second power supply module are both used to connect to the power grid, and the output terminal of the first power supply module and the output terminal of the second power supply module are both connected to external circuits.

[0079] Optionally, the first power supply module and the second power supply module are used to supply power to the external circuit under the power input from the power grid, so that the external circuit can maintain stable operation.

[0080] Optionally, either the first power supply module or the second power supply module may be equipped with a UPS device so that the UPS device can be started under the input power of the power grid.

[0081] The control module is used to send interlocking control signals to the first power supply module and the second power supply module based on the ambient temperature of the power supply circuit collected by the acquisition module.

[0082] Optionally, after receiving the ambient temperature of the power supply circuit collected by the acquisition module, the control module processes the ambient temperature to generate control signals for controlling the first power supply module and the second power supply module, and sends the control signals to the first power supply module and the second power supply module.

[0083] For example, the first power supply module may be equipped with a UPS device, while the second power supply module may not be equipped with a UPS device. After receiving the ambient temperature of the power supply circuit collected by the acquisition module, the control module can process the ambient temperature. If the ambient temperature meets the power supply temperature of the UPS device, it generates control signals to control the first power supply module to close and the second power supply module to open, and sends the control signals to the first power supply module and the second power supply module so that the UPS device in the first power supply module can supply power to the external circuit.

[0084] For example, the first power supply module may be equipped with a UPS device, while the second power supply module may not be equipped with a UPS device. After receiving the ambient temperature of the power supply circuit collected by the acquisition module, the control module can process the ambient temperature. If the ambient temperature does not meet the power supply temperature of the UPS device, it generates control signals to control the first power supply module to disconnect and control the second power supply module to close, and sends the control signals to the first power supply module and the second power supply module so that the second power supply module can supply power to the external circuit under the input power of the grid.

[0085] For example, the first power supply module may not have a UPS device, while the second power supply module may have a UPS device. After receiving the ambient temperature of the power supply circuit collected by the acquisition module, the control module can process the ambient temperature. If the ambient temperature does not meet the power supply temperature of the UPS device, it generates control signals to control the first power supply module to close and the second power supply module to disconnect, and sends the control signals to the first power supply module and the second power supply module.

[0086] The control signal is a control signal that instructs the first power supply module and the second power supply module to interlock.

[0087] In this embodiment, by setting a data acquisition module in the power supply circuit, the ambient temperature of the power supply module can be acquired and sent to the control module. The control module can then process the ambient temperature to generate a control signal for interlocking power supply to the first and second power supply modules. This prevents the UPS equipment from failing to start when the temperature is too high or too low, thus ensuring the normal and stable operation of the energy storage system and increasing the application scenarios of the energy storage system.

[0088] Figure 2 is a schematic diagram of another power supply circuit provided in an embodiment of this application. Referring to Figure 2, based on Figure 1, in one possible implementation, the second input terminal of the control module is used to connect to the power grid.

[0089] Optionally, the control module can process the ambient temperature under the input power of the power grid to generate control signals for controlling the first power supply module and the second power supply module, and send the control signals to the first power supply module and the second power supply module.

[0090] Figure 3 is a schematic diagram of a data acquisition module in a power supply circuit provided in an embodiment of this application.

[0091] In one possible implementation, as shown in Figure 3, the acquisition module includes a temperature and humidity sensor TH and a heat dissipation module FAN.

[0092] The first end of the temperature and humidity sensor TH is used to connect to the neutral wire of the power grid. The second end of the temperature and humidity sensor TH is connected to the first end of the heat dissipation module FAN. The temperature and humidity sensor TH is also connected to the first input end of the control module. The second end of the heat dissipation module FAN is used to connect to the live wire of the power grid.

[0093] Optionally, the temperature and humidity sensor TH is used to collect the ambient temperature and humidity of the power supply circuit and transmit the collected ambient temperature and humidity to the control module via communication, while the heat dissipation module FAN is used to dissipate heat from the power supply circuit.

[0094] For example, the temperature and humidity sensor TH can be a Wi-Fi temperature and humidity sensor, a GPRS / 4G temperature and humidity sensor, a LoRa / NB-IoT temperature and humidity sensor, or a ZigBee temperature and humidity sensor. The heat dissipation module FAN can be a fan or an air conditioner, or other heat dissipation device.

[0095] Figure 4 is a schematic diagram of another structure of the acquisition module in the power supply circuit provided in the embodiment of this application.

[0096] In one possible implementation, referring to Figure 4, the acquisition module further includes a first switch K1, based on Figure 3.

[0097] The first end of the first switch K1 is used to connect to the live wire of the power grid, the second end of the first switch K1 is connected to the second end of the heat dissipation module, the third end of the first switch K1 is used to connect to the neutral wire of the power grid, and the fourth end of the first switch K1 is connected to the first end of the temperature and humidity sensor.

[0098] Optionally, the first switch K1 can be a switch with four terminals, and the first and second terminals of the first switch K1, along with the third and fourth terminals of the first switch K1, are simultaneously open or closed. The first switch K1 is used to control the process of the acquisition module connecting to the power grid.

[0099] Figure 5 is a schematic diagram of another structure of the acquisition module in the power supply circuit provided in the embodiment of this application.

[0100] In one possible implementation, as shown in Figure 5, based on Figure 4, the acquisition module further includes: a first current transformer CT1 and a second current transformer CT2.

[0101] One end of the first current transformer CT1 is connected to the second end of the first switch K1, and the other end of the first current transformer CT1 is connected to the second end of the heat dissipation module FAN; one end of the second current transformer CT2 is connected to the fourth end of the first switch K1, and the other end of the second current transformer CT2 is connected to the first end of the temperature and humidity sensor TH.

[0102] Optionally, the first current transformer CT1 and the second current transformer CT2 are used to convert the large current on the grid side into a small current for the temperature and humidity sensor TH, so that the temperature and humidity sensor TH can work normally, thereby improving the stability of the power supply circuit.

[0103] Figure 6 is a schematic diagram of a control module in a power supply circuit provided in an embodiment of this application.

[0104] In one possible implementation, referring to Figure 6, based on Figure 2, the control module includes a control chip M.

[0105] The first input terminal of the control chip M is connected to the acquisition module, and the second input terminal of the control chip M is used to connect to the power grid; the output terminal of the control chip M is connected to the first input terminal of the first power supply module and the first input terminal of the second power supply module.

[0106] Optionally, after receiving the ambient temperature of the power supply circuit collected by the acquisition module, the control chip M processes the ambient temperature to generate control signals for controlling the first power supply module and the second power supply module, and sends the control signals to the first power supply module and the second power supply module.

[0107] Figure 7 is a schematic diagram of another structure of the control module in the power supply circuit provided in the embodiment of this application.

[0108] In one possible implementation, referring to Figure 7, the control module further includes a second switch K2, based on Figure 6.

[0109] The first end of the second switch K2 is used to connect to the live wire of the power grid. The second and fourth ends of the second switch K2 are connected to the second input end of the control chip M. The third end of the second switch K2 is used to connect to the neutral wire of the power grid.

[0110] Optionally, the second switch K2 can be a switch with four terminals, and the first and second terminals of the second switch K2, along with the third and fourth terminals of the second switch K2, are simultaneously open or closed. The second switch K2 is used to control the process of connecting the control chip M to the power grid.

[0111] Figure 8 is a schematic diagram of another structure of the control module in the power supply circuit provided in the embodiment of this application.

[0112] In one possible implementation, referring to Figure 8, based on Figure 7, the control module further includes: a third current transformer CT3 and a fourth current transformer CT4.

[0113] One end of the third current transformer CT3 is connected to the second end of the second switch K2, and the other end of the third current transformer CT3 is connected to the second input terminal of the control chip M; one end of the fourth current transformer CT4 is connected to the fourth end of the second switch K2, and the other end of the fourth current transformer CT4 is connected to the second input terminal of the control chip M.

[0114] Optionally, the third current transformer CT3 and the fourth current transformer CT4 are used to convert the large current on the grid side into a small current for the control chip M, so that the control chip M can work normally, thereby improving the stability of the power supply circuit.

[0115] Figure 9 is a schematic diagram of the structure of the first power supply module in the power supply circuit provided in the embodiment of this application.

[0116] In one possible implementation, referring to FIG9, based on FIG1, the first power supply module includes: a first switching unit and a power supply module.

[0117] The first input terminal of the first switching unit is connected to the output terminal of the control module. The second input terminal of the first switching unit is used to connect to the power grid. The output terminal of the first switching unit is connected to the input terminal of the power supply module. The output terminal of the power supply module is connected to the external circuit and the output terminal of the second power supply module.

[0118] Optionally, the first switching unit is used to control the process of the power module connecting to the power grid, thereby controlling the power supply mode of the external circuit. The power module is used to supply power to the external circuit, that is, the power module is used to supply power to the external circuit in a way that is not directly powered by the power grid.

[0119] Figure 10 is a schematic diagram of another structure of the first power supply module in the power supply circuit provided in the embodiment of this application.

[0120] In one possible implementation, referring to FIG10, based on FIG9, the first switching unit includes: a third switch K3.

[0121] The first terminal of the third switch K3 is used to connect to the live wire of the power grid. The second and fourth terminals of the third switch K3 are connected to the input terminal of the power module. The third terminal of the third switch K3 is used to connect to the neutral wire of the power grid. The third switch K3 is also connected to the output terminal of the control module.

[0122] Optionally, the third switch K3 can be a switch with four terminals, and the first and second terminals of the third switch K3, along with the third and fourth terminals of the third switch K3, are simultaneously open or closed. The third switch K3 is used to control the process of connecting the power module to the power grid.

[0123] Figure 11 is a schematic diagram of another structure of the first power supply module in the power supply circuit provided in the embodiment of this application.

[0124] In one possible implementation, referring to Figure 11, based on Figure 10, the power supply module is: an uninterruptible power supply system (UPS).

[0125] The input terminal of the uninterruptible power supply (UPS) is connected to the second terminal and the fourth terminal of the third switch, and the output terminal of the UPS is connected to the external circuit.

[0126] Optionally, the UPS is used to supply power to external circuits in a way that is not directly powered by the mains grid.

[0127] Figure 12 is a schematic diagram of another structure of the first power supply module in the power supply circuit provided in the embodiment of this application.

[0128] In one possible implementation, as shown in FIG12, based on FIG11, the first switching unit further includes: a fifth current transformer CT5 and a sixth current transformer CT6.

[0129] One end of the fifth current transformer CT5 is connected to the second end of the third switch K3, and the other end of the fifth current transformer CT5 is connected to the input end of the power supply module; one end of the sixth current transformer CT6 is connected to the fourth end of the third switch, and the other end of the sixth current transformer is connected to the input end of the power supply module.

[0130] Optionally, the first current transformer CT1 and the second current transformer CT2 are used to convert the large current on the grid side into a small current for the temperature and humidity sensor TH, so that the temperature and humidity sensor TH can work normally, thereby improving the stability of the power supply circuit.

[0131] Figure 13 is a schematic diagram of a second power supply module in the power supply circuit provided in an embodiment of this application.

[0132] In one possible implementation, as shown in FIG13, the second power supply module includes: a second switching unit;

[0133] The first input terminal of the second switching unit is connected to the output terminal of the control module, the second input terminal of the second switching unit is used to connect to the power grid, and the output terminal of the second switching unit is connected to the external circuit and the output terminal of the first power supply module.

[0134] Optionally, the second switching unit is used to control whether the external circuit is directly powered by the power grid, thereby controlling the power supply mode of the external circuit.

[0135] In one possible implementation, as shown in FIG13, the second switching unit includes: a fourth switch K4.

[0136] The first end of the fourth switch K4 is used to connect to the live wire of the power grid. The second end and the fourth end of the fourth switch K4 are connected to the external circuit and the output end of the first power supply module. The third end of the fourth switch K4 is used to connect to the neutral wire of the power grid. The fourth switch K4 is also connected to the output end of the control module.

[0137] Optionally, the fourth switch K4 can be a switch with four terminals, and the first and second terminals of the fourth switch K4, along with the third and fourth terminals of the fourth switch K4, are simultaneously open or closed. The fourth switch K4 is used to control whether an external circuit is directly connected to the power grid.

[0138] In one possible implementation, as shown in FIG13, the second switching unit further includes a seventh current transformer CT7 and an eighth current transformer CT8.

[0139] One end of the seventh current transformer CT7 is connected to the second end of the fourth switch K4, and the other end of the seventh current transformer CT7 is connected to the external circuit.

[0140] One end of the eighth current transformer CT8 is connected to the fourth terminal of the fourth switch K4, and the other end of the eighth current transformer CT8 is connected to the external circuit.

[0141] Optionally, the seventh current transformer CT7 and the eighth current transformer CT8 are used to convert the large current on the grid side into a small current for use by the external circuit, so that the external circuit can work normally, thereby improving the stability of the energy storage system.

[0142] It is understood that in the power supply circuit provided in this application embodiment, the temperature and humidity sensor in the acquisition module collects the ambient temperature and humidity of the power supply circuit and sends the collected temperature and humidity to the control chip. The control chip processes the received ambient temperature and humidity to determine whether the current operating conditions of the UPS device are met. If the conditions are met, the UPS device can start and run normally, and power can be supplied to the external circuit through the UPS device. In this case, the control chip can send control signals to the first power supply module and the second power supply module to close the third switch K3 in the first power supply module and simultaneously open the fourth switch K4 in the second power supply module. If the conditions are not met, the UPS device cannot start normally, and power can be supplied to the external circuit through the power grid. In this case, the control chip can send control signals to the first power supply module and the second power supply module to open the third switch K3 in the first power supply module and simultaneously close the fourth switch K4 in the second power supply module.

[0143] It is understandable that the control chip can also switch the power supply mode of the external circuit after detecting that the ambient temperature and humidity meet the operating conditions of the UPS equipment.

[0144] Based on the same inventive concept, this application also provides an energy storage system. Figure 14 is a structural schematic diagram of an energy storage system provided in this application. As shown in Figure 14, the energy storage system includes a power supply circuit and an external circuit.

[0145] Optionally, the external circuit may include other circuits in the energy storage system besides the power supply circuit to ensure the normal operation of the energy storage system, such as: power conversion circuit, control circuit, energy management circuit, cooling circuit, and DC bus filter circuit.

[0146] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application. Industrial applicability

[0147] This application provides a power supply circuit and an energy storage system that can prevent UPS equipment from failing to start when the temperature is too high or too low, thereby ensuring the normal and stable operation of the energy storage system.

[0148] Furthermore, it is understood that the power supply circuit and energy storage system of this application are reproducible and can be widely applied in the field of energy storage system control.

Claims

1. A power supply circuit, characterized in that, include: The system comprises a data acquisition module, a control module, a first power supply module, and a second power supply module. The first end of the acquisition module is used to connect to the power grid, and the second end of the acquisition module is connected to the first input end of the control module. The acquisition module is used to acquire the ambient temperature of the power supply circuit. The output terminal of the control module is connected to the first input terminal of the first power supply module and the first input terminal of the second power supply module. Both the second input terminal of the first power supply module and the second input terminal of the second power supply module are used to connect to the power grid, and both the output terminal of the first power supply module and the output terminal of the second power supply module are connected to an external circuit. The control module is used to send interlocking control signals to the first power supply module and the second power supply module based on the ambient temperature collected by the acquisition module.

2. The power supply circuit according to claim 1, characterized in that, The second input terminal of the control module is used to connect to the power grid.

3. The power supply circuit according to claim 1, characterized in that, The data acquisition module includes: a temperature and humidity sensor and a heat dissipation module; The first end of the temperature and humidity sensor is used to connect to the neutral wire of the power grid, the second end of the temperature and humidity sensor is connected to the first end of the heat dissipation module, and the temperature and humidity sensor is also communicatively connected to the first input end of the control module. The second end of the heat dissipation module is used to connect to the live wire of the power grid.

4. The power supply circuit according to claim 3, characterized in that, The acquisition module further includes: a first switch; The first terminal of the first switch is used to connect to the live wire of the power grid, the second terminal of the first switch is connected to the second terminal of the heat dissipation module, the third terminal of the first switch is used to connect to the neutral wire of the power grid, and the fourth terminal of the first switch is connected to the first terminal of the temperature and humidity sensor.

5. The power supply circuit according to claim 4, characterized in that, The acquisition module further includes: a first current transformer and a second current transformer; One end of the first current transformer is connected to the second end of the first switch, and the other end of the first current transformer is connected to the second end of the heat dissipation module. One end of the second current transformer is connected to the fourth end of the first switch, and the other end of the second current transformer is connected to the first end of the temperature and humidity sensor.

6. The power supply circuit according to claim 2, characterized in that, The control module includes: a control chip; The first input terminal of the control chip is connected to the acquisition module, and the second input terminal of the control chip is used to connect to the power grid; The output terminal of the control chip is connected to the first input terminal of the first power supply module and the first input terminal of the second power supply module.

7. The power supply circuit according to claim 6, characterized in that, The control module also includes: a second switch; The first end of the second switch is used to connect to the live wire of the power grid, the second end and the fourth end of the second switch are connected to the second input end of the control chip, and the third end of the second switch is used to connect to the neutral wire of the power grid.

8. The power supply circuit according to claim 7, characterized in that, The control module also includes: a third current transformer and a fourth current transformer; One end of the third current transformer is connected to the second terminal of the second switch, and the other end of the third current transformer is connected to the second input terminal of the control chip. One end of the fourth current transformer is connected to the fourth terminal of the second switch, and the other end of the fourth current transformer is connected to the second input terminal of the control chip.

9. The power supply circuit according to claim 1, characterized in that, The first power supply module includes: a first switching unit and a power supply module; The first input terminal of the first switching unit is connected to the output terminal of the control module, the second input terminal of the first switching unit is used to connect to the power grid, and the output terminal of the first switching unit is connected to the input terminal of the power module. The output terminal of the power module is connected to the external circuit and the output terminal of the second power supply module.

10. The power supply circuit according to claim 9, characterized in that, The first switching unit includes: a third switch; The first end of the third switch is used to connect to the live wire of the power grid, the second end and the fourth end of the third switch are connected to the input end of the power module, the third end of the third switch is used to connect to the neutral wire of the power grid, and the third switch is also connected to the output end of the control module.

11. The power supply circuit according to claim 10, characterized in that, The power module is an uninterruptible power supply system. The input terminal of the uninterruptible power supply system is connected to the second terminal and the fourth terminal of the third switch, and the output terminal of the uninterruptible power supply system is connected to the external circuit.

12. The power supply circuit according to claim 10, characterized in that, The first switching unit further includes: a fifth current transformer and a sixth current transformer; One end of the fifth current transformer is connected to the second end of the third switch, and the other end of the fifth current transformer is connected to the input end of the power supply module. One end of the sixth current transformer is connected to the fourth terminal of the third switch, and the other end of the sixth current transformer is connected to the input terminal of the power module.

13. The power supply circuit according to claim 1, characterized in that, The second power supply module includes: a second switching unit; The first input terminal of the second switching unit is connected to the output terminal of the control module, the second input terminal of the second switching unit is used to connect to the power grid, and the output terminal of the second switching unit is connected to the external circuit and the output terminal of the first power supply module.

14. The power supply circuit according to claim 13, characterized in that, The second switching unit includes a fourth switch; The first end of the fourth switch is used to connect to the live wire of the power grid, the second end and the fourth end of the fourth switch are connected to the external circuit and the output end of the first power supply module, the third end of the fourth switch is used to connect to the neutral wire of the power grid, and the fourth switch is also connected to the output end of the control module.

15. The power supply circuit according to claim 14, characterized in that, The second switching unit also includes: a seventh current transformer and an eighth current transformer; One end of the seventh current transformer is connected to the second end of the fourth switch, and the other end of the seventh current transformer is connected to the external circuit. One end of the eighth current transformer is connected to the fourth terminal of the fourth switch, and the other end of the eighth current transformer is connected to the external circuit.

16. An energy storage system, characterized in that, It includes the power supply circuit and external circuit as described in claims 1-15.

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