Electric energy storage cabinet

Abstract

The utility model relates to an electric power energy storage cabinet comprising a cabinet body, and a battery cluster, a battery management module and an energy storage converter which are connected in sequence are arranged in the cabinet body to form an energy storage module; the alternating current end of the energy storage converter is connected with an AC electric connection section which is used for being connected with a mains supply end and is also used for being connected with a load; a second set of energy storage modules is also arranged in the cabinet body, and AC electric connection sections of each set of energy storage modules are connected in parallel; an AC power supply module and a DC power supply module are also arranged in the cabinet body, respectively receive commercial power supply and battery cluster power supply, and convert and output direct current to the DC electric connection section; and each functional module is connected to the DC electric connection section to obtain DC power supply. According to the scheme, the electric energy storage cabinet is equivalent to a plurality of sets of energy storage modules sharing the cabinet body, the energy management module, the sensor and the fire-fighting device, and compared with the prior art, the electric energy storage cabinet has lower cost under the same energy storage capacity. A sensor and a fire-fighting device can be arranged in the cabinet body, and automatic monitoring and automatic fire extinguishing are achieved.

Description

Technical Field

[0001] This utility model relates to a power energy storage cabinet. Background Technology

[0002] The demand for electric vehicles has driven the development of battery technology, which in turn has led to new applications of energy storage technology. Energy storage involves connecting multiple rechargeable batteries in series or parallel to form a battery cluster. This cluster can store a significant amount of electrical energy, which can be released to power various loads during power outages or peak electricity demand periods.

[0003] Existing power storage cabinets typically consist of a cabinet containing connected battery clusters, a battery management system (BMS), and an energy storage converter. The BMS manages the charging and discharging of the battery clusters, while the energy storage converter handles bidirectional DC-AC conversion. An energy management system (EMS) is also usually installed within the cabinet to monitor the cabinet's operational status.

[0004] With this implementation method, when users need to expand the capacity of the energy storage cabinet, multiple finished energy storage cabinets need to be connected in parallel, which increases the application cost. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a power energy storage cabinet, in which multiple energy storage modules are connected in parallel in a cabinet, which can increase the capacity of a single energy storage cabinet and reduce the cost of use.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A power storage cabinet includes a cabinet body, in which a battery cluster, a battery management module and an energy storage converter are sequentially connected, and the battery cluster, battery management module and energy storage converter form an energy storage module.

[0008] The AC terminal of the energy storage converter is connected to an AC connection section, which is used to connect to the mains power supply terminal, so that the mains power supply is converted into DC power by the energy storage converter and charged by the battery management module; the AC connection section is also used to connect to the load and supply power to the load.

[0009] The cabinet is also equipped with a second set of the energy storage modules, and the AC electrical connection sections of the energy storage converters of each set of energy storage modules are connected in parallel.

[0010] The cabinet is also equipped with an AC power module, a DC power module and an energy management module. The input end of the AC power module is connected to the AC power connection section, and the output end of the AC power module is connected to the DC power connection section. This allows the AC power module to obtain AC power and convert it to DC power for the DC power connection section.

[0011] The input terminal of the DC power module is connected to the battery cluster, and the output terminal of the DC power module is connected to the DC power connection segment. This allows the DC power module to obtain DC power and convert DC power with an appropriate output voltage to the DC power connection segment.

[0012] The energy management module and the battery management module are respectively connected to the DC power connection section to obtain DC power supply. The energy management module is also connected to the battery management module and the energy storage converter to realize communication and control.

[0013] Furthermore, a cooling system is also provided inside the cabinet. The power input terminal of the cooling system is connected to the AC electrical connection section for obtaining power for the cooling system and for dissipating heat from the battery cluster.

[0014] Furthermore, the cooling system is a liquid cooling system.

[0015] Furthermore, a sensor is also installed inside the cabinet. The power input terminal of the sensor is connected to the DC power connection segment to obtain power. The sensor is connected to the energy management module for communication between the sensor and the energy management module.

[0016] Furthermore, the sensors include temperature sensors and / or smoke sensors.

[0017] Furthermore, the cabinet is also equipped with a fire-fighting device. The power input terminal of the fire-fighting device is connected to the DC power connection section to obtain power. The sensor is connected to the fire-fighting device and is used to send signals to the fire-fighting device to control the fire-fighting device to start fire extinguishing.

[0018] Furthermore, the sensor also includes a water immersion sensor.

[0019] Furthermore, a static transfer switch is installed on the line between the AC power connection section and the mains power supply terminal. The static transfer switch is also connected to the energy storage converter to control the switching so that the mains power supply terminal supplies power to the load, or the energy storage module supplies power to the load.

[0020] The beneficial effects of this utility model are as follows: This power storage cabinet incorporates multiple energy storage modules within a single cabinet. This means that multiple energy storage modules share the cabinet, energy management module, sensors, and fire suppression devices, resulting in lower costs for the same energy storage capacity compared to existing technologies. Furthermore, sensors and fire suppression devices can be installed within the cabinet to achieve automatic monitoring and automatic fire suppression. Attached Figure Description

[0021] Figure 1 This is a functional module diagram of one embodiment of the power storage cabinet in this solution; Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, which typically include:

[0023] A power storage cabinet includes a cabinet body, in which a battery cluster, a battery management module and an energy storage converter are sequentially connected, and the battery cluster, battery management module and energy storage converter form an energy storage module.

[0024] The AC terminal of the energy storage converter is connected to an AC connection section, which is used to connect to the mains power supply terminal, so that the mains power supply is converted into DC power by the energy storage converter and charged by the battery management module; the AC connection section is also used to connect to the load and supply power to the load.

[0025] The cabinet is also equipped with a second set of the energy storage modules, and the AC electrical connection sections of the energy storage converters of each set of energy storage modules are connected in parallel.

[0026] The cabinet is also equipped with an AC power module, a DC power module and an energy management module. The input end of the AC power module is connected to the AC power connection section, and the output end of the AC power module is connected to the DC power connection section. This allows the AC power module to obtain AC power and convert it to DC power for the DC power connection section.

[0027] The input terminal of the DC power module is connected to the battery cluster, and the output terminal of the DC power module is connected to the DC power connection segment. This allows the DC power module to obtain DC power and convert DC power with an appropriate output voltage to the DC power connection segment.

[0028] The energy management module and the battery management module are respectively connected to the DC power connection section to obtain DC power supply. The energy management module is also connected to the battery management module and the energy storage converter to realize communication and control.

[0029] like Figure 1 As shown, the power storage cabinet of this solution has two or more sets of energy storage modules inside the cabinet. Each set of energy storage modules includes a battery cluster, a battery management module and an energy storage converter connected in sequence.

[0030] The battery clusters are used to store electrical energy, and the battery management module is used to control the charging and discharging of the battery clusters. It also has functions such as monitoring the temperature, current and voltage of the battery clusters.

[0031] The energy storage converter is used for bidirectional conversion of AC and DC power. The AC terminal of the energy storage converter is connected to an AC connection section. The AC connection sections of the energy storage converters of each energy storage module in the cabinet are connected in parallel. The AC connection section is used to connect to the mains power supply terminal and also to the load.

[0032] When the energy storage module is charging, the energy storage converter performs rectification, converting the AC power supply into DC power, which is then used by the battery management module to charge the battery clusters. When the energy storage module is discharging, the energy storage converter performs inverter function, converting the stored power in the battery clusters into AC power, which is then output to the AC connection section.

[0033] like Figure 1 In the embodiment shown, the energy storage cabinet has two sets of energy storage modules connected in parallel in the AC connection section. When the energy storage cabinet is in standby mode, the mains power supplied by the mains power supply terminal is directly transmitted to the load through the AC connection section, and the load draws power to work.

[0034] When the energy storage modules are charging, the energy storage inverter of each energy storage module obtains mains power from the AC connection section, converts it into DC power, and charges the corresponding battery cluster. When the energy storage modules are discharging, the energy storage inverter of each energy storage module inverts and outputs mains power, which is then connected in parallel to the AC connection section to supply power to the load. The more energy storage modules connected in parallel in the energy storage cabinet, the stronger the external power supply capability and the larger the energy storage capacity.

[0035] The cabinet is also equipped with AC power modules and DC power modules to supply power to various low-voltage DC equipment and modules.

[0036] The AC power module draws AC power from the AC connection and converts it to DC output. The DC power module draws DC power from the battery pack and converts it to output DC power with a compatible voltage. The above power modules can refer to existing power circuit technologies.

[0037] Both the AC and DC power modules have their outputs connected to the DC power connector; for example, both modules output 5 volts DC. Various low-voltage devices and modules connect to the DC power connector to obtain 5 volts DC power. For example... Figure 1 As shown, the energy management module and battery management module are connected to the DC power connection section to obtain 5V DC power. The cabinet also contains both AC power modules and DC power modules to ensure the DC power supply required by low-voltage equipment.

[0038] The battery management module (BMS) can monitor and control the current and voltage of the battery clusters and manage charging and discharging. When an abnormality is detected, the charging and discharging path can be disconnected.

[0039] The Energy Management Module (EMS) is connected to both the Battery Management Module (BLM) and the Energy Storage Converter. It can also acquire and monitor the current and voltage of the battery clusters, monitor the operating status of the Energy Storage Converter, and send control signals to the BLM and the Energy Storage Converter, such as disconnecting the charging and discharging path of the BLM and controlling the Energy Storage Converter to switch between rectification and inversion functions.

[0040] The power storage cabinet in this solution contains multiple energy storage modules connected in parallel within a single cabinet. Each energy storage module shares components such as the energy management module and the power supply module, which is equivalent to using multiple energy storage cabinets in parallel. This solution has a lower operating cost.

[0041] More preferably, the cabinet may also be equipped with a cooling system, the power input terminal of which is connected to the AC electrical connection section for obtaining power for the cooling system and for dissipating heat from the battery cluster.

[0042] Typically, cooling systems can employ either air cooling or liquid cooling. Their primary purpose is to dissipate heat from the battery clusters, but they can also help dissipate heat from other circuit components. For example, an air cooling system allows cool air to blow across the battery clusters and carry away heat, while a liquid cooling system places cooling pipes close to the battery clusters, relying on the coolant flowing inside the pipes to remove heat. Existing technologies can be referenced for the above.

[0043] The cabinet may also contain a sensor, the power input terminal of which is connected to the DC power connection section to obtain power. The sensor is also connected to the energy management module for communication between the sensor and the energy management module.

[0044] Various types of sensors are used to detect and monitor the state inside the energy storage cabinet. These may include temperature sensors and / or smoke sensors. The sensors detect the temperature and smoke levels inside the energy storage cabinet and then send them to the energy management module. If the energy management module determines that the temperature or smoke levels exceed the threshold, it can execute safety commands. For example, the energy management module may send a signal to the battery management module and / or the energy storage converter to shut off the charging and discharging path of the battery cluster.

[0045] More preferably, the cabinet may also be equipped with a fire-fighting device, the power input terminal of which is connected to the DC power connection section to obtain power, and the sensor is connected to the fire-fighting device to send a signal to control the fire-fighting device to start fire extinguishing.

[0046] Firefighting devices can be, for example, existing electronically controlled automatic fire extinguishing devices. When a sensor detects that a value inside the cabinet exceeds a threshold, such as a temperature sensor detecting that the temperature inside the cabinet exceeds a threshold, it sends an activation signal to the electronically controlled automatic fire extinguishing device. Subsequently, the electronically controlled automatic fire extinguishing device performs fire extinguishing actions, such as spraying fire extinguishing powder into the cabinet.

[0047] Depending on the situation, the sensor may also send the detection data to the energy management module, which will then determine and execute safety commands, such as sending an activation signal to an electronically controlled automatic fire extinguishing device.

[0048] As mentioned earlier, to ensure the safe use of energy storage cabinets, multiple sensors can be used for monitoring, including water immersion sensors. These sensors can detect whether water has entered the cabinet. The detection data is sent to the energy management module, which then determines and executes safety commands.

[0049] In addition, a static transfer switch can be installed on the line between the AC power connection section and the mains power supply terminal. The static transfer switch is also connected to the energy storage converter to control the switching so that the mains power supply terminal supplies power to the load, or the energy storage module supplies power to the load.

[0050] like Figure 1 As shown, when the mains power supply is working normally, the static transfer switch controls the power supply path to supply power to the load from the mains power supply. When the static transfer switch detects that the mains power supply has stopped, i.e. when the mains power is out, the static transfer switch automatically switches the power supply path to supply power to the load from the energy storage module and sends a control signal to make the energy storage converter perform the inverter function. At this time, the electrical energy stored by the battery cluster is inverted and used to supply power to the load.

Claims

1. A power storage cabinet, comprising a cabinet body, wherein a battery cluster, a battery management module and an energy storage converter are sequentially connected inside the cabinet body, the battery cluster, the battery management module and the energy storage converter forming an energy storage module; The AC terminal of the energy storage converter is connected to an AC connection section, which is used to connect to the mains power supply terminal, so that the mains power supply is converted into DC power by the energy storage converter and charged by the battery management module; the AC connection section is also used to connect to the load and supply power to the load. Its features are, The cabinet is also equipped with a second set of the energy storage modules, and the AC electrical connection sections of the energy storage converters of each set of energy storage modules are connected in parallel. The cabinet is also equipped with an AC power module, a DC power module and an energy management module. The input end of the AC power module is connected to the AC power connection section, and the output end of the AC power module is connected to the DC power connection section. This allows the AC power module to obtain AC power and convert it to DC power for the DC power connection section. The input terminal of the DC power module is connected to the battery cluster, and the output terminal of the DC power module is connected to the DC power connection segment. This allows the DC power module to obtain DC power and convert DC power with an appropriate output voltage to the DC power connection segment. The energy management module and the battery management module are respectively connected to the DC power connection section to obtain DC power supply. The energy management module is also connected to the battery management module and the energy storage converter to realize communication and control.

2. The power storage cabinet as described in claim 1, characterized in that, The cabinet is also equipped with a cooling system. The power input terminal of the cooling system is connected to the AC electrical connection section to obtain power for the cooling system and to dissipate heat from the battery cluster.

3. The power storage cabinet as described in claim 2, characterized in that, The cooling system is a liquid cooling system.

4. The power storage cabinet as described in claim 1, characterized in that, The cabinet is also equipped with a sensor. The power input terminal of the sensor is connected to the DC power connection section to obtain power. The sensor is connected to the energy management module for communication between the sensor and the energy management module.

5. The power storage cabinet as described in claim 4, characterized in that, The sensors include temperature sensors and / or smoke sensors.

6. The power storage cabinet as described in claim 5, characterized in that, The cabinet is also equipped with a fire-fighting device. The power input terminal of the fire-fighting device is connected to the DC power connection section to obtain power. The sensor is connected to the fire-fighting device and is used to send signals to the fire-fighting device to control the fire-fighting device to start fire extinguishing.

7. The power storage cabinet as described in claim 5, characterized in that, The sensor also includes a water immersion sensor.

8. The power storage cabinet as described in claim 1, characterized in that, A static transfer switch is installed on the line between the AC power connection section and the mains power supply terminal. The static transfer switch is also connected to the energy storage converter and is used to control the switching so that the mains power supply terminal supplies power to the load, or the energy storage module supplies power to the load.

Images