Energy storage container and power supply circuit thereof
Patent Information
- Application Number
- CN202522447540.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-18
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-11-18
AI Technical Summary
由于主动均衡模块的功耗较大，因此会大大增加电池管理系统的功耗，对UPS功率要求较大，且当系统主电路断电时，主动均衡模块依旧会消耗UPS电池电量，严重影响系统备电时长
[0012]本实用新型设置不间断电源仅与电池管理系统中的第一电池管理电路电连接，第二电池管理电路可不与不间断电源电连接，如此，在供电电网断电时，不间断电源可仅为第一电池管理供电，可降低不间断电源的功率需求，有利于降低设备成本；同时，在供电电网断电时，不间断电源可仅为第一电池管理供电，使能不间断电源中的能量消耗较慢，有利于增加备电时长。
Smart Images
Figure CN224909154U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power supply technology, and in particular to an energy storage container and its power supply circuit. Background Technology
[0002] With the development of the energy storage market, customers are demanding increasingly longer warranty periods for their systems, currently requiring a lifespan of up to 20 years. Because individual cells exhibit subtle differences in parameters such as capacity, internal resistance, and self-discharge rate, these differences are amplified during charge-discharge cycles after assembly, leading to lifespan degradation. Traditional passive balancing BMS solutions cannot effectively address this issue; therefore, active balancing solutions have become the choice of major manufacturers.
[0003] Currently, active balancing modules are typically configured within battery management systems (BMS), which are powered by the UPS circuitry of the power distribution system. Because active balancing modules consume a significant amount of power, they substantially increase the power consumption of the BMS, placing higher demands on the UPS power supply. Furthermore, when the main power circuit fails, the active balancing module continues to consume UPS battery power, severely impacting the system's backup power duration. Utility Model Content
[0004] This invention provides an energy storage container and its power supply circuit to reduce the impact of the active balancing module on the backup power duration and increase the backup power duration.
[0005] In a first aspect, this utility model embodiment provides a power supply circuit for an energy storage container, the power supply circuit being used to connect the power grid and the battery management system;
[0006] The power supply circuit includes an uninterruptible power supply;
[0007] The battery management system includes a first power terminal, a second power terminal, a first battery management circuit, and a second battery management circuit; the first power terminal is electrically connected to the first battery management circuit; the second power terminal is electrically connected to the second battery management circuit.
[0008] The first power supply terminal is electrically connected to the power grid via the uninterruptible power supply; the second power supply terminal is electrically connected to the power grid, and the second power supply terminal is not electrically connected to the uninterruptible power supply.
[0009] The power supply circuit can be configured to provide an electrical signal to the first battery management circuit through the uninterruptible power supply when the power grid is powered, and to continue providing an electrical signal to the first battery management circuit through the uninterruptible power supply when the power grid is de-energized.
[0010] The power supply circuit can also be configured to provide an electrical signal to the second battery management circuit when the power grid is powered, and to stop providing an electrical signal to the second battery management circuit when the power grid is de-energized.
[0011] Secondly, this utility model embodiment also provides an energy storage container, including: an energy storage system, a battery management system, and the aforementioned power supply circuit.
[0012] This invention configures the uninterruptible power supply (UPS) to be electrically connected only to the first battery management circuit in the battery management system, while the second battery management circuit may not be electrically connected to the UPS. In this way, when the power grid fails, the UPS can supply power only to the first battery management circuit, which can reduce the power demand of the UPS and help reduce equipment costs. At the same time, when the power grid fails, the UPS can supply power only to the first battery management circuit, which enables the energy consumption in the UPS to be slower and helps to increase the backup power duration. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the power supply circuit of an energy storage container provided in an embodiment of the present invention;
[0014] Figure 2 This is a schematic diagram of the power supply circuit of another energy storage container provided in this embodiment of the present invention;
[0015] Figure 3 This is a schematic diagram of the power supply circuit of another energy storage container provided in this embodiment of the present utility model;
[0016] Figure 4 This is a schematic diagram of the power supply circuit of another energy storage container provided in this embodiment of the present invention. Detailed Implementation
[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0018] A power supply circuit for a battery management system of an energy storage container is disclosed. The power supply circuit is used to connect a power grid and the battery management system. The power supply circuit includes an uninterruptible power supply (UPS). The battery management system includes a first power terminal, a second power terminal, a first battery management circuit, and a second battery management circuit. The first power terminal is electrically connected to the first battery management circuit. The second power terminal is electrically connected to the second battery management circuit. The first power terminal is electrically connected to the power grid via the UPS. The second power terminal is electrically connected to the power grid but not electrically connected to the UPS. The power supply circuit can be configured to provide an electrical signal to the first battery management circuit via the UPS when the power grid is powered, and to continue providing an electrical signal to the first battery management circuit via the UPS when the power grid is de-energized. The power supply circuit can also be configured to provide an electrical signal to the second battery management circuit when the power grid is powered, and to stop providing an electrical signal to the second battery management circuit when the power grid is de-energized.
[0019] By adopting the above technical solution, the uninterruptible power supply (UPS) is electrically connected only to the first battery management circuit in the battery management system, while the second battery management circuit is not electrically connected to the UPS. In this way, when the power grid fails, the UPS can supply power only to the first battery management circuit, which can reduce the power demand of the UPS and help reduce equipment costs. At the same time, when the power grid fails, the UPS can supply power only to the first battery management circuit, which enables the energy consumption in the UPS to be slower and helps to increase the backup power duration.
[0020] The above is the core idea of this application. The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.
[0021] The terminology used in the embodiments of this utility model is for the purpose of describing specific embodiments only and is not intended to limit the utility model. It should be noted that directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this utility model are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this utility model. Furthermore, in the context, it should be understood that when referring to an element being formed "on" or "below" another element, it can be formed not only directly on or below the other element, but also indirectly on or below it through intermediate elements. The terms "first," "second," etc., are used for descriptive purposes only and do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0022] It should be noted that the implementation methods provided in this utility model embodiment can be combined with each other without contradiction.
[0023] Figure 1 This is a schematic diagram of the power supply circuit of an energy storage container provided in an embodiment of this utility model, for reference. Figure 1 The power supply circuit connects the power grid and the battery management system 20. The power supply circuit includes an uninterruptible power supply (UPS) 10. The battery management system 20 includes a first power terminal PV1, a second power terminal PV2, a first battery management circuit 21, and a second battery management circuit 22. The first power terminal PV1 is electrically connected to the first battery management circuit 21, and the second power terminal PV2 is electrically connected to the second battery management circuit 22. The first power terminal PV1 is electrically connected to the power grid via the UPS 10; the second power terminal PV2 is electrically connected to the power grid but not electrically connected to the UPS 10. The power supply circuit can be configured to provide electrical signals to the first battery management circuit 21 via the UPS 10 when the power grid is powered, and to continue providing electrical signals to the first battery management circuit 21 via the UPS 10 when the power grid is de-energized. The power supply circuit can also be configured to provide electrical signals to the second battery management circuit 22 when the power grid is powered, and to stop providing electrical signals to the second battery management circuit 22 when the power grid is de-energized.
[0024] Among them, the uninterruptible power supply 10 is a device that can provide continuous and stable power to connected devices when the power grid fails or the voltage is abnormal. It can provide temporary power through a built-in battery, which can prevent core data loss or hardware damage.
[0025] The battery management system 20 is a device for monitoring, controlling, and protecting batteries. Through real-time data acquisition and intelligent algorithms, it ensures the safe and efficient operation of the battery system, extending its lifespan and reliability. In one embodiment, the battery management system 20 includes a state monitoring circuit (not shown in the figure), which may include an information acquisition module, an analysis module (analyzing the state based on the acquired information, such as calculating the state of charge, state of health, power state, energy state, and determining whether a fault exists), and a storage module (for data recording). In another embodiment, the battery management system 20 also includes an active balancing circuit (not shown in the figure). The active balancing circuit uses electronic technology to precisely control the charging and discharging of each battery in the battery pack, ensuring a balanced energy distribution among the batteries, thereby maximizing the lifespan of the battery pack and improving the overall performance of the system.
[0026] The first battery management circuit 21 in this embodiment can be any circuit in the battery management system 20. This embodiment does not specifically limit the first battery management circuit 21, but the first battery management circuit 21 does not include all the circuits in the battery management system 20. Similarly, the second battery management circuit 22 in this embodiment can also be any circuit in the battery management system 20. This embodiment does not specifically limit the second battery management circuit 22, but the second battery management circuit 22 also does not include all the circuits in the battery management system 20.
[0027] For example, the energy storage container may also include other electrical loads such as a liquid chiller 11, a fire protection system 12, an air conditioner 13, and an emergency system 40. The power supply circuit may also include a first busbar B01 (e.g., 400V AC) and a second busbar B02 (e.g., 230V AC), as well as fuses FU and surge protectors SPD for connection to the power grid. The power supply circuit can be electrically connected to the first busbar B01 via the first busbar switch Q01. The first busbar B01 can also be electrically connected to non-emergency electrical loads such as the liquid chiller 11, the fire protection system 12, the air conditioner 13, and the second battery management circuit 22. The uninterruptible power supply 10 can be electrically connected to the second busbar B02 via the second busbar switch Q02. The second busbar B02 can be electrically connected to emergency loads such as the emergency system 40 and the first battery management circuit 21. Among these, the non-emergency electrical loads can only operate when the power grid is energized, while the emergency loads can operate when the power grid is de-energized.
[0028] When the power grid is powered, it can supply electrical signals to the first battery management circuit 21 in the battery management system 20 through the uninterruptible power supply 10. It can also directly supply electrical signals to the second battery management circuit 22 in the battery management system 20 without going through the uninterruptible power supply 10. In this case, both the first and second battery management circuits 21 and 22 in the battery management system 20 are operational. When the power grid is de-energized, the uninterruptible power supply 10 continues to supply electrical signals to the first battery management circuit 21 in the battery management system 20, but does not supply electrical signals to the second battery management circuit 22. In this case, the first battery management circuit 21 is operational, but the second battery management circuit 22 is not operational.
[0029] The power supply circuit of the energy storage container provided in this embodiment of the utility model is configured such that the uninterruptible power supply is only electrically connected to the first battery management circuit in the battery management system, and the second battery management circuit may not be electrically connected to the uninterruptible power supply. In this way, when the power grid fails, the uninterruptible power supply can only supply power to the first battery management circuit, which can reduce the power demand of the uninterruptible power supply and help reduce equipment costs. At the same time, when the power grid fails, the uninterruptible power supply can only supply power to the first battery management circuit, which enables the energy consumption in the uninterruptible power supply to be slower and helps to increase the backup power duration.
[0030] In an optional embodiment, the power supply circuit further includes a battery BAT; the battery BAT is electrically connected to the uninterruptible power supply 10, which helps to further increase the backup power duration.
[0031] In another optional embodiment, the first battery management circuit 21 includes a state monitoring circuit. Thus, after a power grid outage, the battery management system can continue to monitor the battery's state, record and store data, especially fault states, which is beneficial to battery health.
[0032] In another optional embodiment, the second battery management circuit 22 includes an active balancing circuit. Thus, the active balancing circuit can be deactivated after a power grid outage, which helps reduce the impact of the active balancing circuit on the backup power duration.
[0033] In yet another alternative embodiment, reference continues to... Figure 1 The power supply circuit also includes a first AC / DC converter 31 and a second AC / DC converter 32; the AC terminal of the first AC / DC converter 31 is electrically connected to the uninterruptible power supply 10, and the DC terminal of the first AC / DC converter 32 is electrically connected to the first power supply terminal PV1; the AC terminal of the second AC / DC converter 32 is electrically connected to the power grid, and the DC terminal of the second AC / DC converter 32 is electrically connected to the second power supply terminal PV2.
[0034] The first AC / DC converter 31 is used to convert the AC power output from the uninterruptible power supply 10 into DC power, and the second AC / DC converter 32 is used to convert the AC power from the power grid into DC power.
[0035] For example, the first AC / DC converter 31 is electrically connected to the second bus B02, and the first AC / DC converter 31 can convert the 230V AC power output from the uninterruptible power supply 10 into 24V DC power to be supplied to the first battery management circuit 21. The second AC / DC converter 32 is electrically connected to the first bus B01, and the second AC / DC converter 32 can convert the 400V AC power from the power grid into 24V DC power to the second battery management circuit 22.
[0036] Optional, Figure 2 This is a schematic diagram of the power supply circuit of another energy storage container's battery management system provided in this embodiment of the present invention, for reference. Figure 2 The power supply circuit also includes a selection switch SC, with its first terminal electrically connected to the first power supply terminal PV1 and its second terminal electrically connected to the second power supply terminal PV2. The power supply circuit can also be configured to provide an electrical signal to the second battery management circuit 22 when the power grid is powered, and to continue providing an electrical signal to the second battery management circuit 22 via the uninterruptible power supply 10 and the selection switch SC when the power grid is de-energized.
[0037] The selector switch SC can be an electrical switch or a mechanical switch, and this embodiment of the invention does not limit the type of switch.
[0038] For example, when the selector switch SC is on, the second battery management circuit 22 can be connected to the uninterruptible power supply 10 through the selector switch SC. When the power grid fails, the second battery management circuit 22 can receive energy from the uninterruptible power supply 10 and continues to operate. This is suitable for situations where active battery balancing is still required after a power grid failure. When the selector switch SC is off, the second battery management circuit 22 is not connected to the uninterruptible power supply 10. When the power grid fails, the second battery management circuit 22 cannot receive energy from the uninterruptible power supply 10 and stops operating. This is suitable for situations where active battery balancing is not required after a power grid failure. In this way, the connection relationship between the uninterruptible power supply 10 and the second battery management circuit 22 can be flexibly set according to the actual needs under different circumstances by manually controlling or using the first battery management circuit 21 to control the on / off state of the selector switch SC. This makes the application more flexible, controllable, and improves applicability.
[0039] It should be noted that the figure only shows the selection switch SC set on the DC side of the first AC / DC converter 31 and the second AC / DC converter 32 as an example. In other optional embodiments, the selection switch SC can also be set on the AC side of the first AC / DC converter 31 and the second AC / DC converter 32.
[0040] In an alternative embodiment, Figure 3 This is a circuit diagram of the power supply circuit of a battery management system for an energy storage container provided in another embodiment of this utility model. (Refer to...) Figure 3 The power supply circuit also includes a first switch S1 and a second switch S2; the first end of the selector switch SC is electrically connected to the first power supply terminal PV1 through the first switch S1; the second end of the selector switch SC is electrically connected to the second power supply terminal PV2 through the second switch S2.
[0041] The first switch S1 and the second switch S2 can be either electrical switches or mechanical switches, and this embodiment of the utility model does not limit them.
[0042] For example, when the power grid is energized, both the first switch S1 and the second switch S2 can be turned on, while the selector switch SC can be turned off. When the power grid is de-energized, the first switch S1 can be turned on, while the selector switch SC and the second switch S2 can be turned off. The first battery management circuit 21 continues to work, while the second battery management circuit 22 stops working. In this way, by setting the second switch S2, the failure or misoperation of the selector switch SC can be avoided. Alternatively, when the power grid is de-energized, the first switch S1 can be turned off, while the selector switch SC and the second switch S2 can be turned on. The first battery management circuit 21 stops working, while the second battery management circuit 22 continues to work. In this way, by setting the first switch S1 and the second switch S2, the circuit that can continue to work when the power grid is de-energized can be flexibly selected according to actual needs.
[0043] In another alternative embodiment, reference continues... Figure 3 The power supply circuit also includes a first power supply switch QP1 and a second power supply switch QP2; the first terminal of the selector switch SC is electrically connected to the uninterruptible power supply through the first power supply switch QP1; the second terminal of the selector switch SC is electrically connected to the power grid through the second power supply switch QP2.
[0044] The first power supply switch QP1 and the second power supply switch QP2 can be either electronically controlled switches or mechanical switches; this embodiment of the invention does not impose any limitations on either.
[0045] For example, when the selector switch SC is turned on, only one of the first power supply switch QP1 and the second power supply switch QP2 can be turned on while the other is turned off. In this way, a short circuit between the first busbar B01 and the second busbar B02 can be avoided.
[0046] For example, when the power grid is energized, the first power supply switch QP1 can be turned off, and the second power supply switch QP2 and the selector switch SC can be turned on, so that the power grid can directly supply power to the first battery management circuit 21 and the second battery management circuit 22. In this way, the energy loss caused by the energy conversion of the uninterruptible power supply 10 can be avoided, and the energy received by the first battery management circuit 21 is no longer limited by the power of the uninterruptible power supply 10, which is beneficial to improving the working performance of the first battery management circuit 21 when the power grid is energized. When the power grid is de-energized, the first power supply switch QP1 can be turned on, and the selector switch SC can be turned off, which can prevent the second battery management circuit 22 from consuming the energy of the uninterruptible power supply 10, and can also prevent leakage from the first bus B01 to the second bus B02.
[0047] It should be noted that the figure only shows the first power supply switch QP1 being disposed on the AC side of the first AC / DC converter 31. In other optional embodiments, the first power supply switch QP1 may also be disposed on the DC side of the first AC / DC converter 31. The figure only shows the second power supply switch QP2 being disposed on the AC side of the second AC / DC converter 32. In other optional embodiments, the first power supply switch QP1 may also be disposed on the DC side of the second AC / DC converter 32.
[0048] Based on the above embodiments, Figure 4 This is a schematic diagram of the power supply circuit of a battery management system for an energy storage container according to another embodiment of the present invention. (Refer to...) Figure 4 The power supply circuit also includes a first AC / DC converter 31, a second AC / DC converter 32, a first diode D1, and a second diode D2. The AC terminal of the first AC / DC converter 31 is electrically connected to the uninterruptible power supply 10, the DC terminal of the first AC / DC converter 31 is electrically connected to the anode of the first diode D1, and the cathode of the first diode D1 is electrically connected to the first terminal of the selector switch SC. The AC terminal of the second AC / DC converter 32 is electrically connected to the power grid, the DC terminal of the second AC / DC converter 32 is electrically connected to the anode of the second diode D2, and the cathode of the second diode D2 is electrically connected to the second terminal of the selector switch SC. This design prevents a short circuit between the first busbar B01 and the second busbar B02, thus avoiding irreversible damage.
[0049] Based on the same inventive concept, this utility model embodiment also provides an energy storage container, including an energy storage system and a battery management system and its power supply circuit provided in any embodiment of this utility model.
[0050] The energy storage container provided in this embodiment includes the battery management system and its power supply circuit described in any of the above embodiments, and thus the energy storage container has the corresponding functions and beneficial effects.
[0051] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims
1. A power supply circuit for an energy storage container, characterized in that, The power supply circuit is used to connect the power grid and the battery management system; The power supply circuit includes an uninterruptible power supply; The battery management system includes a first power terminal, a second power terminal, a first battery management circuit, and a second battery management circuit; the first power terminal is electrically connected to the first battery management circuit; the second power terminal is electrically connected to the second battery management circuit. The first power supply terminal is electrically connected to the power grid via the uninterruptible power supply; the second power supply terminal is electrically connected to the power grid, and the second power supply terminal is not electrically connected to the uninterruptible power supply. The power supply circuit can be configured to provide an electrical signal to the first battery management circuit through the uninterruptible power supply when the power grid is powered, and to continue providing an electrical signal to the first battery management circuit through the uninterruptible power supply when the power grid is de-energized. The power supply circuit can also be configured to provide an electrical signal to the second battery management circuit when the power grid is powered, and to stop providing an electrical signal to the second battery management circuit when the power grid is de-energized.
2. The power supply circuit of the energy storage container according to claim 1, characterized in that, The first battery management circuit includes a state monitoring circuit.
3. The power supply circuit of the energy storage container according to claim 1, characterized in that, The second battery management circuit includes an active balancing circuit.
4. The power supply circuit of the energy storage container according to claim 1, characterized in that, The power supply circuit also includes a first AC / DC converter and a second AC / DC converter; The AC terminal of the first AC / DC converter is electrically connected to the uninterruptible power supply, and the DC terminal of the first AC / DC converter is electrically connected to the first power supply terminal. The AC terminal of the second AC / DC converter is electrically connected to the power grid, and the DC terminal of the second AC / DC converter is electrically connected to the second power supply terminal.
5. The power supply circuit of the energy storage container according to claim 1, characterized in that, The power supply circuit also includes a selection switch; The first end of the selector switch is electrically connected to the first power supply terminal, and the second end of the selector switch is electrically connected to the second power supply terminal; The power supply circuit can also be configured to provide an electrical signal to the second battery management circuit when the power grid is powered, and to continue providing an electrical signal to the second battery management circuit through the uninterruptible power supply and the selection switch when the power grid is de-energized.
6. The power supply circuit of the energy storage container according to claim 5, characterized in that, The power supply circuit also includes a first switch and a second switch; The first end of the selector switch is electrically connected to the first power supply terminal via the first switch; the second end of the selector switch is electrically connected to the second power supply terminal via the second switch.
7. The power supply circuit for the energy storage container according to claim 5, characterized in that, The power supply circuit also includes a first power supply switch and a second power supply switch; The first end of the selector switch is electrically connected to the uninterruptible power supply via the first power supply switch; the second end of the selector switch is electrically connected to the power grid via the second power supply switch.
8. The power supply circuit for the energy storage container according to claim 5, characterized in that, The power supply circuit also includes a first AC / DC converter, a second AC / DC converter, a first diode, and a second diode; The AC terminal of the first AC / DC converter is electrically connected to the uninterruptible power supply, the DC terminal of the first AC / DC converter is electrically connected to the anode of the first diode, and the cathode of the first diode is electrically connected to the first terminal of the selection switch. The AC terminal of the second AC / DC converter is electrically connected to the power grid, the DC terminal of the second AC / DC converter is electrically connected to the anode of the second diode, and the cathode of the second diode is electrically connected to the second terminal of the selector switch.
9. The power supply circuit of the energy storage container according to claim 1, characterized in that, The power supply circuit also includes a storage battery; The battery is electrically connected to the uninterruptible power supply.
10. An energy storage container, characterized in that, include: Energy storage system, battery management system, and power supply circuit as described in any one of claims 1-9.