Household energy storage cabinet

Abstract

The utility model discloses a household energy storage cabinet, which belongs to the technical field of energy storage, and comprises a cabinet body, a plurality of groups of sodium salt battery packs arranged in the cabinet body, and a plug-in assembly arranged on the cabinet body, the multiple groups of sodium salt battery packs are connected in series and then are electrically connected with the plug-in assembly through the BMS high-voltage box, and the plug-in assembly at least comprises a plug-in port used for being connected with an external load; the energy storage cabinet is high in energy storage, convenient to maintain and higher in environmental adaptability, can provide required voltage for household load equipment, meets household power utilization requirements, is particularly suitable for families where power supply cannot be guaranteed, meets the household power utilization requirements under the condition of power failure, and guarantees normal use of household appliances under the condition of power failure.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage technology, and in particular relates to a household energy storage cabinet. Background Technology

[0002] Sodium salt batteries are a type of sodium battery, specifically a high-temperature semi-solid sodium battery. They are characterized by stable product properties, high safety performance, long service life, wide application range, readily available and non-toxic raw materials, and simple and pollution-free waste recycling processes. They have already been applied in energy storage and backup power projects in data centers, communication base stations, and other applications in 25 countries worldwide.

[0003] Sodium-ion batteries are a new type of high-safety battery on the market, but there are very few companies involved in their development. Among the companies that have truly achieved mass production, the only ones are FZ-SONIC in Italy and Anli Energy, a subsidiary of Chaowei Power Group in China. Due to the unique high-temperature characteristics of sodium-ion batteries, and limited by current technology, the batteries that have been mass-produced so far are only used in the backup power fields of base stations and data centers, and have not been applied in the residential energy storage market. Strictly speaking, the residential energy storage market for sodium-ion batteries is still a blank blue ocean market.

[0004] Therefore, it is necessary to design a residential energy storage cabinet that can accommodate sodium-ion battery packs. This outdoor sodium-ion energy storage cabinet can be applied to user-side energy storage (including photovoltaic energy storage), home backup power, peak-valley arbitrage, and other fields, achieving a breakthrough in the application of sodium-ion batteries in the residential energy storage market. Utility Model Content

[0005] The purpose of this invention is to provide a household energy storage cabinet, which is based on sodium salt batteries and offers high energy storage capacity, easy maintenance, and stronger environmental adaptability.

[0006] To address the aforementioned issues, this solution provides a residential energy storage cabinet, comprising a cabinet body, multiple sodium-ion battery packs disposed within the cabinet body, and a plug-in assembly disposed on the cabinet body. Each sodium-ion battery pack is equipped with a BMS high-voltage box, and the multiple sodium-ion battery packs are connected in series and electrically connected to the plug-in assembly via the BMS high-voltage box. The plug-in assembly includes at least a plug-in port for connecting to an external load.

[0007] As a preferred embodiment of this application, the plug-in assembly includes an AC switching power supply, an auxiliary relay A, a circuit breaker A, and an AC input socket. The AC input terminal of the AC switching power supply is electrically connected to the AC input socket through the auxiliary relay A. Meanwhile, the DC output terminal of the AC switching power supply is connected to the heater input interface and the charging interface on the BMS high-voltage box, respectively. The auxiliary relay A is connected to the circuit breaker A to control the on / off state of the input voltage.

[0008] As a preferred embodiment of this application, the plug-in assembly includes a three-hole socket, a DC output socket, a main relay, and a circuit breaker B. The three-hole socket and the DC output socket serve as plug-in ports for connecting to external loads. The DC power output port of the BMS high-voltage box is electrically connected to the three-hole socket and the DC output socket respectively through the main relay. The DC output socket can be electrically connected to a matching energy storage inverter to output AC power that matches the mains power to the user. At the same time, the main relay is electrically connected to the circuit breaker B to control the on / off state of the output voltage.

[0009] As a preferred embodiment of this application, the cabinet is provided with a power distribution compartment, and the plug-in assembly is disposed in the power distribution compartment.

[0010] As a preferred embodiment of this application, the power distribution compartment has a built-in heat dissipation mechanism, which includes heat dissipation louvers and a heat dissipation fan. The heat dissipation fan is connected to the temperature control terminal on the control circuit board of the BMS high-voltage box through an auxiliary relay B.

[0011] As a preferred embodiment of this application, the plug-in assembly includes an RS485 socket or a data acquisition terminal, wherein the input terminal of the RS485 socket is connected to the RS485 output terminal of the BMS high-voltage box; and the data acquisition terminal is connected to the data acquisition line outlet of the BMS high-voltage box.

[0012] As a preferred embodiment of this application, the front end panel and the rear end panel of the cabinet are both openable and closable door panels. The door panels are installed on the door frame of the cabinet by hinges to realize opening and closing. At the same time, a linkage lock for locking the door panel is provided at the opposite end of the door panel and the hinge.

[0013] As a preferred embodiment of this application, the internal cavity of the cabinet is divided into multiple battery compartments by a bracket plate. At the same time, a positioning plate is provided on the inner wall of each battery compartment. Multiple sets of sodium salt battery packs are respectively installed in the corresponding battery compartments and are limited by the positioning plate.

[0014] As a preferred embodiment of this application, the cabinet includes a lower base with a grounding nut built into it.

[0015] Compared with existing technologies, the advantages of this application are:

[0016] This solution designs a household energy storage cabinet, which integrates a plug-in component and an energy storage unit consisting of multiple sodium salt battery packs. By using the energy storage power supply and the plug-in component, the required voltage can be provided to household load devices to meet household electricity needs. It is especially suitable for households where power supply cannot be guaranteed, solves the problem of household electricity needs during power outages, and ensures the normal use of household appliances during power outages. Attached Figure Description

[0017] Figure 1 This is a front view schematic diagram of the overall structure of the household energy storage cabinet provided by this utility model.

[0018] Figure 2 This is a rear view schematic diagram of the overall structure of the household energy storage cabinet provided by this utility model.

[0019] Figure 3 This is a schematic diagram of the internal structure of the household energy storage cabinet provided by this utility model.

[0020] Figure 4 This is a top view of the household energy storage cabinet provided by this utility model.

[0021] Figure 5 This is a right-side structural schematic diagram of the household energy storage cabinet provided by this utility model.

[0022] Figure 6 This is an isometric view of the sodium salt battery pack provided by this utility model.

[0023] Figure Labels

[0024] 10-Cabinet body; 11-First power distribution compartment cover; 12-Front end plate; 13-Second power distribution compartment cover; 14-Rear end plate; 15-Lower base; 151-Grounding nut; 16-Cassette wheel; 17-Side positioning plate; 18-Sealing strip; 19-Top positioning plate; 20-Sodium salt battery pack; 21-BMS high voltage box; 22-Bracket plate; 30-First power distribution compartment; 31-AC switching power supply; 32-Auxiliary relay B; 33-Cooling fan; 34-Wire tie; 35-Auxiliary relay A; 36-Main... Relay; 40-Second power distribution compartment; 41-Circuit breaker A; 42-Circuit breaker B; 44-RS485 socket; 45-Data acquisition terminal; 46-AC input socket; 47-DC output socket; 48-Three-hole socket; 101-Heat dissipation hole; 121-Air inlet hole; 122-Hinge; 123-Link lock; 124-Air inlet louver; 201-Lifting lug; 211-Data acquisition output terminal; 212-RS485 output terminal; 213-DC power output port; 214-Heater inlet interface. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be emphasized that the following description is merely exemplary and not intended to limit the scope and application of the present invention.

[0026] like Figure 1-2The diagram shown is an overall structural schematic of a household energy storage cabinet provided in this embodiment. The energy storage cabinet includes multiple sodium salt battery packs 20 disposed within the cabinet body 10, and a plug-in assembly disposed on the cabinet body 10. The sodium salt battery packs 20 are equipped with a BMS high-voltage box 21, and the multiple sodium salt battery packs 20 are connected in series and electrically connected to the plug-in assembly through the BMS high-voltage box 21. The plug-in assembly includes at least a plug-in port for connecting to an external load. Through this plug-in port, DC voltage can be directly provided to the user, or the required mains power can be provided to the user through an inverter, ensuring the reliable operation of household appliances.

[0027] Specifically, the energy storage cabinet is a rectangular cabinet with an installation opening on the cabinet body 10. N (1≤N≤10) sodium-ion battery packs 20 are installed inside the cabinet body 10. The number of sodium-ion battery packs 20 installed inside the cabinet body 10 can be selected based on the customer's energy requirements for the energy storage cabinet. The specific installation steps for the sodium-ion battery packs 20 include: hooking the lifting lugs 201 on the four corners of the sodium-ion battery pack 20 (also called battery pack 20) ​​with a lifting tool, lifting the battery pack 20 and placing it on a forklift; then moving the forklift to the position facing the opening of the cabinet body 10, adjusting the height of the battery pack 20 to a suitable position, and pushing the battery pack 20 into the cabinet body 10 to complete the installation; multiple battery packs 20 are connected in series via DC power lines and then electrically connected to the plug-in assembly to achieve the purpose of supplying power to the user side.

[0028] In this embodiment, both the front end plate 12 and the rear end plate 14 of the cabinet 10 are openable doors. When either door is opened, an opening is formed on the cabinet 10, which serves as the installation opening for the cabinet 10. The door is installed on the door frame of the cabinet 10 via a hinge 122 to achieve opening and closing. A sealing strip 18 is provided on the door frame of the cabinet 10 to achieve sealing after the door is closed. After the door is closed, the protection level of the entire energy storage cabinet can reach IP54, meeting the requirements for outdoor installation and use. A linkage lock 123 is provided at the opposite end of the door and the hinge 122 to lock the door. The locking of the door is achieved through the linkage lock 123, ensuring the safety and ease of operation of the cabinet 10. Specifically, when it is necessary to install or maintain the sodium salt battery pack 20, the linkage lock 123 can be turned open with a key to open the corresponding door (preferably the front end plate in this embodiment). After installation or maintenance, the door can be closed and locked.

[0029] In this embodiment, a heat dissipation mechanism is provided on the front door panel of the cabinet 10. The heat dissipation mechanism includes an air inlet 121 on the door panel and an air inlet louver 124 on the back of the air inlet 121. The heat dissipation mechanism is used to regulate the temperature inside the cabinet 10 and ensure that the sodium salt battery pack 20 operates safely at a suitable temperature.

[0030] like Figure 6The above is a schematic diagram of the overall structure of the sodium salt battery pack 20 provided in this embodiment. As shown in the figure, the BMS high voltage box 21 is locked to the front end plate of the battery pack 20 by a nut. The voltage and temperature acquisition lines inside the battery pack 20 are connected to the data acquisition input terminal of the BMS high voltage box 21. The acquired temperature and voltage information can be transmitted to the outside through the data acquisition output terminal 211 or RS485 output terminal 212 on the BMS high voltage box 21. The DC power line of the battery pack 20 is connected to the DC terminal on the circuit control board of the BMS high voltage box 21. The DC power line is led out through the DC power output port 213 on the BMS high voltage box 21. It can be understood that the BMS high voltage box 21 should also be provided with at least a heater input interface 214, a charging interface, a control interface, etc.

[0031] like Figure 3 The diagram shows the internal structure of the cabinet 10 provided in this embodiment. The inner cavity of the cabinet 10 is divided into multiple battery compartments arranged vertically by the bracket plate 22. Multiple sodium salt battery packs 20 are installed in the corresponding battery compartments. In order to improve the stability of the installation of the sodium salt battery packs 20, it is preferable to fix positioning plates on the inner walls of each battery compartment. The positioning plates preferably include side positioning plates 17 and top positioning plates 19 arranged on the left and right sides of the battery compartment. The positioning plates are fixed to the corresponding side walls of the battery compartments by external hexagonal screws. After the battery pack 20 is pushed into the battery compartment, the positioning plates can effectively restrict and fix the left and right and up and down positions of the sodium salt battery pack 20, so as to avoid the problem of the battery pack 20 shifting due to vibration during transportation and thus affecting the connection reliability.

[0032] In summary, this embodiment integrates a plug-in assembly and an energy storage unit consisting of multiple sodium-ion battery packs 20. The combination of this energy storage unit and the plug-in assembly provides the required voltage for household load devices, meeting household electricity needs. It is particularly suitable for households where power supply is unreliable. Specifically, the energy storage cabinet connects to an external inverter via the plug-in assembly. This external inverter can not only charge directly on household power sources but also provide household mains power during power outages. Alternatively, it can be directly connected to an external load via the plug-in assembly to provide DC voltage, thus solving the household electricity needs during power outages, ensuring the normal operation of household appliances, and achieving a combination of discharging and energy storage.

[0033] The plug-in assembly includes an AC switching power supply 31, an auxiliary relay A35, a circuit breaker A41, and an AC input socket 46. The AC switching power supply 31 is used to convert external AC power into DC power. The AC input terminal of the AC switching power supply 31 is electrically connected to the AC input socket 46 through the auxiliary relay A35. At the same time, the DC output terminal of the AC switching power supply 31 is connected to the heater inlet interface 214 and the charging interface on the BMS high-voltage box 21, respectively. The auxiliary relay A35 is connected to the circuit breaker A41 to control the on / off of the input AC voltage to ensure the safe operation of the cabinet 10.

[0034] Specifically, the AC input terminal of the AC switching power supply 31 is electrically connected to the auxiliary contact of the auxiliary relay A35, and the AC input socket 46 is electrically connected to the main contact of the auxiliary relay A35. At the same time, the coil of the auxiliary relay A35 is electrically connected to the circuit breaker A41. In use, the AC input socket 46 is connected to the household power supply on the user side. This power supply can be used to directly charge the battery pack 20 with the charging interface. Alternatively, this power supply can be used to power the heater inside the battery pack 20 with the heater inlet interface 214 to heat the battery pack 20. This function is used to heat the internal cells of the sodium salt battery pack 20 when it is first started.

[0035] The plug-in assembly includes a three-hole socket 48, a DC output socket 47, a main relay 36, and a circuit breaker B42. The three-hole socket 48 and the DC output socket 47 serve as plug-in ports for connecting to external loads. The DC power output port 213 of the BMS high-voltage box 21 is electrically connected to the three-hole socket 48 and the DC output socket 47 via the main relay 36. The DC output socket 47 can be electrically connected to the matching energy storage inverter to output AC power matching the mains power to the user. At the same time, the main relay 36 is electrically connected to the circuit breaker B to control the on / off of the output voltage.

[0036] Specifically, the sodium salt battery pack 20 leads the DC power line through the BMS high voltage box 21 and the DC power output port 213 to connect with the main contacts of the main relay 36. The auxiliary contacts of the main relay 36 are electrically connected to the three-hole socket 48 and the DC output socket 47 respectively. At the same time, the coil of the main relay 36 is electrically connected to the circuit breaker B42. The three-hole socket 48 and the DC output socket 47 serve as plug-in ports for connecting to external loads. The external load can obtain the required DC voltage by directly connecting to the three-hole socket 48. The external load device can obtain AC power that matches the mains power after connecting to the DC output socket 47 through the energy storage inverter. The circuit breaker B42 controls the on and off of the voltage output to ensure the safety of the user.

[0037] The plug-in assembly also includes an RS485 socket 44 or a data acquisition terminal 45. The input end of the RS485 socket 44 is connected to the RS485 output terminal 212 of the BMS high-voltage box 21 via a network cable, and the data acquisition terminal 45 is connected to the data acquisition line outlet of the BMS high-voltage box 21 via a data cable. Through the RS485 socket 44 or the data acquisition terminal 45, the collected temperature or voltage information can be transmitted to the outside to achieve real-time and effective data transmission. In this embodiment, the RS485 socket 44 or the data acquisition terminal 45 can be directly connected to an external host computer for communication, or it can be connected to an external device or host computer for communication through an inverter.

[0038] The cabinet 10 is equipped with a power distribution compartment, and the plug-in components are disposed within the power distribution compartment. Preferably, this embodiment includes two power distribution compartments: a first power distribution compartment 30 disposed on the top of the cabinet 10 and a second power distribution compartment 40 disposed on the side wall of the cabinet 10. Each power distribution compartment is provided with a corresponding cover; that is, the first power distribution compartment 30 is provided with a first power distribution compartment cover 11, and the second power distribution compartment 40 is provided with a second power distribution compartment cover 13. It is understood that, to achieve better sealing strength, sealing strips 18 that cooperate with the cover doors can be provided at each compartment opening, such as... Figure 4-5 As shown; in this embodiment, the first power distribution compartment 30 is used to install functional components that easily generate heat, such as AC switching power supply 31, auxiliary relay A35, auxiliary relay B32, and main relay 36. The second power distribution compartment 40 is used to install interface components such as plugs and ports, such as circuit breaker A41, circuit breaker B42, RS485 socket 44, AC input socket 46, data acquisition terminal 45, DC output socket 47, and three-hole socket 48. The above-mentioned distribution method of plug-in components is beneficial for both reasonable wiring and easy connection to external load equipment.

[0039] To improve safety, a heat dissipation mechanism is built into the power distribution compartment. In this embodiment, the heat dissipation mechanism is preferably only installed in the first power distribution compartment 30. The heat dissipation mechanism mainly includes heat dissipation louvers and heat dissipation fans 33. The louvers have an IP54 protection rating. Two high-performance heat dissipation fans 33 are installed inside the louvers. The circuit connection steps of the high-performance heat dissipation fans 33 are as follows: the lead wire of each heat dissipation fan 33 is connected to the auxiliary contact of the auxiliary relay B32, and the main contact of the auxiliary relay B32 is connected to the temperature control terminal on the control circuit board in the BMS high-voltage box 21. The opening strategy of the high-performance heat dissipation fans 33 is as follows: when the temperature inside the cabinet 10 is ≥45℃, the heat dissipation fan 33 is turned on to exhaust the high-temperature hot air inside the energy storage cabinet through the heat dissipation hole 101. When the temperature inside the cabinet 10 is <45℃, the heat dissipation fan 33 is turned off.

[0040] The cabinet 10 includes a lower base 15, on which a grounding nut 151 is built-in to facilitate grounding of the cabinet 10 and improve the safety of the cabinet 10 during operation.

[0041] A caster wheel 16 is installed at the bottom of the base 15 below the cabinet 10, which facilitates the movement of the cabinet 10.

[0042] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various improvements without departing from this utility model, and these improvements should also be considered within the scope of protection of this utility model. These improvements will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of the claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A domestic energy storage cabinet comprising a cabinet body, characterised in that: The cabinet comprises a plurality of groups of sodium salt battery packs arranged in the cabinet body, and a plug-in assembly arranged on the cabinet body, the sodium salt battery packs are provided with a BMS high-voltage box, and the plurality of groups of sodium salt battery packs are connected in series and connected to the plug-in assembly through the BMS high-voltage box, and the plug-in assembly comprises at least a plug-in port for connecting to an external load.

2. The home energy storage cabinet of claim 1, wherein, The plug-in assembly comprises an AC switching power supply, an auxiliary relay A, an air switch A and an AC input socket, the AC input end of the AC switching power supply is connected to the AC input socket through the auxiliary relay A, and the DC output end of the AC switching power supply is connected to the heater input interface and the charging interface of the BMS high-voltage box, respectively, and the auxiliary relay A is connected to the air switch A to control the on-off of the input voltage.

3. The home energy storage cabinet of claim 1, wherein, The plug-in assembly comprises a three-hole socket, a DC output socket, a main relay and an air switch B, wherein the three-hole socket and the DC output socket are plug-in ports for connecting to an external load; the DC power output port of the BMS high-voltage box is connected to the three-hole socket and the DC output socket through the main relay, the DC output socket can be connected to a matching energy storage inverter to output AC power matching the mains for users, and the main relay is connected to the air switch B to control the on-off of the output voltage.

4. The home energy storage cabinet of claim 1, wherein, The cabinet body is provided with a power distribution cabin, and the plug-in assembly is arranged in the power distribution cabin.

5. The home energy storage cabinet of claim 4, wherein, The power distribution cabin is provided with a cooling mechanism comprising a cooling louver and a cooling fan, and the cooling fan is connected to a temperature control terminal on the control circuit board of the BMS high-voltage box through an auxiliary relay B.

6. The home energy storage cabinet of claim 1, wherein, The plug-in assembly comprises an RS485 socket or a data acquisition terminal, the input end of the RS485 socket is connected to the RS485 output terminal of the BMS high-voltage box, and the data acquisition terminal is connected to the data acquisition line outlet of the BMS high-voltage box.

7. The home energy storage cabinet of claim 1, wherein, The front end plate and the rear end plate of the cabinet body are both openable and closable door plates, which are installed on the door frame of the cabinet body through hinges to realize opening and closing, and a connecting rod lock is arranged at the opposite end of the door plate and the hinge to lock the door plate.

8. The home energy storage cabinet of claim 1, wherein, The inner cavity of the cabinet body is divided into a plurality of battery cabins by a bracket plate, and a positioning plate is arranged on the inner wall of each battery cabin, and a plurality of groups of sodium salt battery packs are arranged in the corresponding battery cabins and positioned by the positioning plate.

9. The home energy storage cabinet of claim 1, wherein, The cabinet body comprises a lower base, and a grounding nut is arranged in the lower base.

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