Household energy storage system convenient for battery replacement

Abstract

A household energy storage system convenient for battery replacement relates to the technical field of energy storage, and comprises a cabinet body, and a PDU high-voltage box and a lithium battery which are installed in the cabinet body. An opening is formed in the front face of the cabinet body, and a plurality of layer plates are arranged in the cabinet body in the height direction. Wherein the layer plate on the uppermost layer is used for fixedly installing a PDU high-voltage box, lithium batteries are installed on the other layer plates, baffles are arranged at the top and the bottom of each lithium battery, and the baffles are fixedly connected with the layer plates through bolts; the PDU high-voltage box and the plurality of lithium batteries can enter and exit from the cabinet body through the opening; the energy storage system has the advantage that the battery is convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a household energy storage system with convenient battery replacement. Background Art

[0002] As the global demand for clean energy continues to grow, energy transformation has become an irreversible trend worldwide. Energy storage technology has become the focus of attention, and large-scale energy storage technology is considered to be a strategic technology to support the popularization of renewable energy.

[0003] In addition, due to the continuous rise in electricity prices and the aging of power transmission and distribution equipment, more and more households hope to achieve energy independence and reduce their dependence on the traditional power grid. Home energy storage systems meet this demand by integrating renewable energy and battery technology. Home energy storage refers to the storage of electricity generated by renewable energy such as solar and wind energy in energy storage devices for household use when needed. It is used in scenarios such as residences, courtyard rooftops, and remote areas without electricity. It has the functions of improving the level of new energy consumption, enhancing the flexibility of the power system, and ensuring the safe and stable operation of new power systems.

[0004] However, in existing technologies, home energy storage systems generally adopt a structure with multiple batteries connected in series, and in order to ensure a firm connection between the batteries, the position of the batteries generally needs to be fixed by mechanisms such as baffles. However, due to the large number of charge and discharge times of the energy storage system, the battery wear is large, and the battery often needs to be replaced after a period of time. The process of removing the baffles makes battery replacement more cumbersome. In addition, also because of the baffles, the installation position and number of batteries are fixed, so the traditional home energy storage system cannot be expanded or reduced in capacity.

[0005] A Chinese patent (CN220821807U) discloses a universal household energy storage structure that securely fits the end plates to the battery, ensuring stability during transportation. However, replacing the lithium battery requires disassembling the end plates and other structures, which is cumbersome and affects the maintenance efficiency of the energy storage system.

[0006] Therefore, we propose a home energy storage system with convenient battery replacement. Utility Model Content

[0007] In order to overcome the deficiencies in the background technology, the utility model discloses a household energy storage system with convenient battery replacement.

[0008] In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical solutions:

[0009] A household energy storage system with convenient battery replacement includes a cabinet, a PDU high-voltage box and lithium batteries installed in the cabinet; the front of the cabinet is set as an opening, and a plurality of shelves are provided in the cabinet along the height direction; the top shelf is used for fixing the PDU high-voltage box, and the lithium batteries are installed on the remaining shelves, and the top and bottom of the lithium batteries are provided with baffles, which are fixedly connected to the shelves by bolts; the PDU high-voltage box and multiple lithium batteries can enter and exit the cabinet through the opening.

[0010] Preferably, the open side of the cabinet body is provided with a cabinet door that can be opened and closed.

[0011] Preferably, a partition is provided between adjacent layers, and the partition is used to divide the space between the adjacent layers into two placement cavities, and a lithium battery is installed in each of the two placement cavities.

[0012] Preferably, a positioning mechanism for guiding the battery to the installation position is provided in the placement cavity.

[0013] Preferably, the positioning mechanism includes two symmetrical guides, the guides include a spring group and a guide plate, the head ends of the spring groups are fixedly connected to the guide plates, the guide plates are in conflict with the sides of the battery, and the tail ends of the spring groups are fixedly connected to the corresponding sides of the placement cavity.

[0014] Preferably, one end of the guide plate corresponding to the cabinet opening side is set as a bent end, and the bending direction of the bent end is toward the corresponding side surface of the placement cavity.

[0015] Preferably, an armrest is fixedly provided on the surface of the baffle.

[0016] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0017] The utility model discloses a household energy storage system that facilitates battery replacement. By adopting a multi-layer cabinet structure, multiple lithium batteries can be installed. In addition, the lithium battery baffles and the layer plates are bolted together to meet the requirements of flexible disassembly of the lithium batteries, thereby achieving expansion or reduction of the energy storage system.

[0018] In addition, the bolt connection between the lithium battery and the shelf makes it easier to replace the individual lithium batteries;

[0019] In addition, the partition and positioning mechanism can effectively limit the position of the lithium battery, so that the lithium battery can be quickly positioned when bolted, thereby facilitating the installation of the lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A structural diagram of the utility model;

[0021] Figure 2It is a structural diagram of the positioning mechanism;

[0022] Figure 3 This is a structural diagram of the input and output connectors.

[0023] In the figure: 1. Cabinet body; 2. PUD high-voltage box; 3. Lithium battery; 4. Shelf; 5. Baffle; 6. Cabinet door; 7. Partition; 8. Positioning mechanism; 81. Guide plate; 82. Spring group; 9. Armrest; 10. Input and output connectors; 11. Charging connector; 12. Circuit board. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" and the like indicating directions or positional relationships, these are merely corresponding to the drawings of the present invention and are for the convenience of describing the present invention. They do not indicate or imply that the devices or components referred to must have a specific direction.

[0025] Example 1 is:

[0026] Combined with attachment Figure 1-3 The household energy storage system with convenient battery replacement includes a cabinet 1, a PDU high-voltage box 2 and a lithium battery 3 installed in the cabinet 1; the front of the cabinet 1 is set as an opening, and a plurality of shelves 4 are provided in the cabinet 1 along the height direction. The cabinet 1 adopts a multi-layer structure and can be used to accommodate multiple small-capacity lithium batteries 3. After the multiple small-capacity lithium batteries 3 are connected in series, a large-capacity lithium battery 3 group can be obtained. The small-capacity lithium batteries 3 are low in cost, which can effectively reduce the overall production cost of the energy storage system; in addition, the small-capacity lithium batteries 3 use lithium batteries 3 with a capacity of 5KWh, and each lithium battery 3 is equipped with an aerosol fire-fighting device to quickly extinguish the fire in the event of a short circuit fire and protect the battery safety;

[0027] In particular, the cabinet body 1 is provided with a cabinet door 6 that can be opened and closed on the opening side, which can protect the internal lithium battery 3 and the PDU high-voltage box 2 and prevent dust from entering the cabinet body 1 to a certain extent;

[0028] The topmost layer 4 is used to fix the PDU high-voltage box 2, and the remaining layers 4 are installed with lithium batteries 3. The top and bottom of the lithium battery 3 are provided with baffles 5, which are fixedly connected to the partition 7 by bolts; the PDU high-voltage box 2 and multiple lithium batteries 3 can enter and exit the cabinet 1 through the opening;

[0029] The PDU high-voltage box 2 has a built-in BMS module, which is the core protection device of this energy storage system. Its main function is to control power input and output, and to control and protect the circuit from overload or short circuit. It has the advantages of small size, short wiring distance, simplicity, and easy maintenance and installation. The BMS module is used to maintain each lithium battery 3, prevent overcharging and over-discharging of the lithium battery 3, extend the service life of the lithium battery 3, and monitor the status of the lithium battery 3. It is the core component to ensure the normal operation of this device. The BMS module is also responsible for data exchange between the lithium battery 3 and devices such as the PCS and EMS for intelligent management.

[0030] It should be noted that the back of the cabinet 1 is provided with input and output connectors 10, a control connector, multiple charging connectors 11 and a circuit board 12, wherein the input and output connectors 10 are electrically connected to the bidirectional converter, the control connector is electrically connected to the PUD high-voltage box 2, and the multiple charging connectors 11 are electrically connected one by one to the multiple lithium batteries 3 respectively; and the input and output connectors 10, the control connector, and the multiple charging connectors 11 are all electrically connected to the circuit board 12, which integrates peripheral circuits and electrical connection lines. The circuit board 12 is used for electrical connection between the connectors, thereby realizing electrical connection between the PUD high-voltage box 2, the lithium battery 3 and the external power supply;

[0031] In addition, in a specific working embodiment of the energy storage system: when the energy storage system is charging, the bidirectional converter is electrically connected to the solar module, and the AC power generated by the solar module is converted into DC power through the bidirectional converter, and then enters the lithium battery 3 through the charging connector 11 for storage under the control of the BMS module in the PUD high-voltage box 2; when the energy storage system is discharging, the bidirectional converter is electrically connected to the load, and the DC power stored in the lithium battery 3 is converted into AC power through the bidirectional converter under the control of the BMS module in the PUD high-voltage box 2 and then directly output to the load.

[0032] Example 2 is:

[0033] On the basis of Example 1, the placement method of the lithium battery 3 is further limited, specifically: a partition 7 is provided between adjacent layer plates 4, and the partition 7 is used to divide the space between adjacent layer plates 4 into two placement cavities, and a lithium battery 3 is installed in each of the two placement cavities; that is, two lithium batteries 3 are placed on each layer in the cabinet 1. This placement method, on the one hand, facilitates the series connection between the lithium batteries 3, and on the other hand, is conducive to the placement and removal of the lithium batteries 3, which also meets the expansion or reduction requirements of the energy storage system.

[0034] In addition, a positioning mechanism 8 is provided in the placement cavity for guiding the battery to the installation position. Since the lithium battery 3 and the layer plate 4 are connected by bolts, there is a fixed installation position between the two. Therefore, the positioning mechanism 8 can guide the lithium battery 3 to the installation position when installing the lithium battery 3, thereby facilitating the subsequent installation operation of the worker.

[0035] As needed, the positioning mechanism 8 includes two symmetrical guide members, which include a spring group 82 and a guide plate 81. The head ends of the spring groups 82 are fixedly connected to the guide plates 81, which contact the side surfaces of the battery, and the tail ends of the spring groups 82 are fixedly connected to the corresponding side surfaces of the placement cavity. In this embodiment, when the lithium battery 3 is to enter the placement cavity, the guide plates 81 of the two guide members are first manually pressed toward the corresponding side surfaces of the placement cavity, and then the lithium battery 3 is placed in the placement cavity, and the guide plates 81 are loosened at the same time. The guide plates 81 of the guide members on both sides of the lithium battery 3 will exert a force on the lithium battery 3 under the action of the spring group 82. When the forces exerted on the lithium battery 3 by the spring groups 82 on both sides are the same, the lithium battery 3 will be located in the installation position, and then the worker will install bolts at the corresponding positions of the baffle 5 and the layer plate 4 of the lithium battery 3 to achieve fixed installation of the lithium battery 3.

[0036] In addition, the guide members on both sides also exert lateral squeezing force on the lithium battery 3 , further improving the stability of the lithium battery 3 .

[0037] In particular, the guide plate 81 also has another structural embodiment, specifically, the end of the guide plate 81 corresponding to the opening side of the cabinet 1 is set as a bent end, and the bending direction of the bent end is toward the corresponding side of the placement cavity. This shape of the guide plate makes it unnecessary for workers to manually press the guide plate 81 in advance when the lithium battery 3 enters the placement cavity. The lithium battery 3 enters the placement cavity directly from the bent end of the guide plate 81, and the guide plate 81 can be pushed by the cabinet of the lithium battery 3 itself, which effectively reduces the intervention of workers and reduces the workload of workers.

[0038] In addition, an armrest 9 is fixedly provided on the surface of the baffle 5 , and the armrest 9 can be used for workers to hold, making it convenient for workers to take out or put in the lithium battery 3 .

[0039] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure marks in the claims should not be regarded as limiting the claims involved.

Claims

1. A household energy storage system with convenient battery replacement, characterized by: The invention comprises a cabinet (1), and a PDU high-voltage box (2) and a lithium battery (3) installed in the cabinet (1); the front of the cabinet (1) is set as an opening, and a plurality of layers (4) are provided in the cabinet (1) along the height direction; the uppermost layer (4) is used for fixing the PDU high-voltage box (2), and the lithium batteries (3) are installed on the remaining layers (4), and baffles (5) are provided on the top and bottom of the lithium battery (3), and the baffles (5) are fixedly connected to the layers (4) by bolts; the PDU high-voltage box (2) and the plurality of lithium batteries (3) can enter and exit the cabinet (1) through the opening.

2. The household energy storage system with convenient battery replacement according to claim 1, characterized in that: The open side of the cabinet body (1) is provided with a cabinet door (6) that can be opened and closed.

3. The household energy storage system with convenient battery replacement according to claim 1, characterized in that: A partition (7) is provided between adjacent layer plates (4), and the partition (7) is used to divide the space between the adjacent layer plates (4) into two placement cavities, wherein a lithium battery (3) is respectively installed in the two placement cavities.

4. The household energy storage system with convenient battery replacement according to claim 3, characterized in that: A positioning mechanism (8) for guiding the lithium battery (3) to the installation position is provided in the placement cavity.

5. The household energy storage system with convenient battery replacement according to claim 4, characterized in that: The positioning mechanism (8) includes two symmetrical guide members, the guide members including a spring group (82) and a guide plate (81), the head ends of the spring groups (82) are fixedly connected to the guide plates (81), the guide plates (81) are in contact with the side surfaces of the battery, and the tail ends of the spring groups (82) are fixedly connected to the corresponding side surfaces of the placement cavity.

6. The household energy storage system with convenient battery replacement according to claim 5, characterized in that: One end of the guide plate (81) corresponding to the opening side of the cabinet (1) is set as a bent end, and the bending direction of the bent end is toward the corresponding side of the placement cavity.

7. The household energy storage system with convenient battery replacement according to claim 1, characterized in that: An armrest (9) is fixedly provided on the surface of the baffle (5).

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