Energy storage battery sheet metal box structure with size-adjustable battery compartment

Abstract

The utility model discloses an energy storage battery sheet metal box structure with a size-adjustable battery compartment, which comprises a sheet metal box body, the battery compartment is arranged in the sheet metal box body, the battery compartment comprises a bottom plate and a U-shaped fixing structure arranged on the bottom plate, the U-shaped fixing structure comprises a fixed bottom wall and fixed side walls arranged on two sides of the fixed bottom wall in parallel, and the fixed side walls are arranged on the bottom plate. The other end part of the fixed side wall is provided with a movable baffle plate which is parallel and opposite to the fixed bottom wall; and the distance between the movable baffle plate and the fixed bottom wall is adjusted through position movement and locking of the movable baffle plate, so that the size of the battery compartment is adjusted. The energy storage battery metal plate box structure with the size-adjustable battery compartment has the characteristics of high size universality, high fixing reliability and convenience in operation.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage batteries, in particular to a sheet metal box structure of an energy storage battery with adjustable battery compartment size. Background Technique

[0002] Energy storage batteries, commonly known as energy storage cells, are devices that can store energy for later use. They play a crucial role in modern power systems and the field of renewable energy, especially in the context of the increasing popularity of solar and wind energy. The main goal of energy storage batteries is to solve the problem of energy supply-demand mismatch by storing excess energy for release during peak demand periods, ensuring the stability of the power grid and the efficient utilization of energy.

[0003] Energy storage module products mainly consist of batteries + BMS placed in a sheet metal box. Among them, many batteries use square battery cells. When the assembly plant purchases battery cells as incoming materials, although the battery cells are of the same model, there are thickness differences in different qualities. For products that pursue cost-effectiveness and use second-life batteries, the thicknesses of the used batteries are all swollen to varying degrees. Therefore, it is difficult to control the size of the battery compartment in the sheet metal box during the design of energy storage module products. To meet the usage requirements of different sizes as much as possible, the current main approach is to make the size of the battery compartment in the sheet metal box larger, and the side plates are directly welded and fixed to the sheet metal box body to meet the packaging requirements of different sizes, as specifically shown in Figure 1 the figure. However, when the size of the battery cell is relatively small, a large amount of EVA cotton needs to be used for filling, wasting a lot of EVA materials. In addition, the large elasticity of EVA will cause the battery cell to fluctuate in position during transportation and vibration after encapsulation, thereby affecting the reliability of battery cell fixation. Content of the Utility Model

[0004] The purpose of the utility model is to provide a sheet metal box structure of an energy storage battery with adjustable battery compartment size, which has the characteristics of strong size versatility, high fixation reliability, and convenient operation.

[0005] The utility model can be realized through the following technical solutions:

[0006] The utility model discloses a sheet metal box structure of an energy storage battery with adjustable battery compartment size, which includes a sheet metal box body. A battery compartment is arranged inside the sheet metal box body. The battery compartment includes a bottom plate and a "U"-shaped fixing structure arranged on the bottom plate. The "U"-shaped fixing structure includes a fixed bottom wall and fixed side walls parallel to both sides of the fixed bottom wall. The other end of the fixed side wall is provided with a movable baffle parallel and opposite to the fixed bottom wall. The distance between the movable baffle and the fixed bottom wall is adjusted by moving and locking the position of the movable baffle to realize the adjustment of the battery compartment size.

[0007] Furthermore, the movable baffle is movably linked to the fixed side wall through the pressure adjusting bolt at its end, and the pressure adjusting bolt penetrates through the movable baffle and is screwed into the cross-section of the fixed side wall. By setting the pressure adjusting bolt, the tightness can be adjusted according to the thickness of the battery cell to achieve the adjustment of the abutting pressure.

[0008] Furthermore, a position fixing bolt is also provided between the movable baffle and the bottom plate. The position fixing bolt penetrates through the bottom plate and abuts against the long strip-shaped fixing hole at the bottom of the movable baffle. By setting the fixing bolt, position fixing is formed from the bottom of the movable baffle to avoid position fluctuations.

[0009] Furthermore, a number of square battery cells are stacked in the battery compartment. The square battery cells are soft-pack battery cells or aluminum shell battery cells, meeting the usage requirements of different types of battery cells.

[0010] Furthermore, the square battery cells are electrically connected by series connection, parallel connection or series-parallel connection.

[0011] Furthermore, the sheet metal box body is a metal box body. The metal box body is a stainless steel box body or an aluminum alloy box body, having good mechanical strength and protection effect.

[0012] Furthermore, an EVA board for tightness adjustment is movably embedded between the movable baffle and the adjacent battery cell. By embedding the EVA board, the mechanical energy can be finely adjusted and buffered, and the influence of excessive filling of EVA cotton on reliability is also avoided.

[0013] Furthermore, the bottom plate of the sheet metal box body is also provided with fixing holes for fixing the sheet metal box body. The fixing holes are arranged on the outer sides of both ends of the bottom plate, facilitating the fixed installation of the sheet metal box body.

[0014] Furthermore, the square battery cell is a lithium-ion battery cell, and the lithium-ion battery cell is a lithium iron phosphate battery cell, a lithium manganese oxide battery cell or a lithium cobalt oxide battery cell.

[0015] Furthermore, the square battery cell is a sodium-ion battery cell, and the sodium-ion battery cell is a polyanion battery cell, a layered oxide battery cell or a Prussian material battery cell.

[0016] The structure of the energy storage battery sheet metal box with adjustable battery compartment size of the present utility model has the following beneficial effects:

[0017] First, the size has strong versatility. By setting the movable baffle, the distance between the movable baffle and the fixed bottom wall can be adjusted, so as to meet the packaging requirements of different-sized battery cells in the battery compartment;

[0018] Second, the fixing reliability is high. The adjustability of the movable baffle can adjust the position of the movable baffle according to the thickness of the battery cell, so that the movable baffle firmly abuts against the surface of the battery cell, without an overly wide loose space, improving the fixing effect;

[0019] Third, it is convenient to operate. Compared with the traditional sheet metal box, the sheet metal box structure of the present utility model can be realized only by changing and adjusting the structure of the position of the movable baffle. Other structures and operation processes are the same as the original structure and encapsulation process, simplifying the processing and encapsulation processes. Brief Description of the Drawings

[0020] Appendix Figure 1 is an exploded structural schematic diagram of a sheet metal box structure of an energy storage battery with adjustable battery compartment size according to the present utility model;

[0021] Appendix Figure 2 is a structural schematic diagram of a foam protective cover of a sheet metal box structure of an energy storage battery with adjustable battery compartment size according to the present utility model;

[0022] The marks in the drawings include: 100, bottom plate; 110, fixed hole; 200, fixed bottom wall; 300, fixed side wall; 400, movable baffle; 410, pressure adjusting bolt; 420, position fixing bolt. Detailed Description of the Embodiment

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the products of the present utility model will be further described in detail below in conjunction with the embodiments.

[0024] As Figure 2 shown, it includes a sheet metal box body. A battery compartment is arranged inside the sheet metal box body. The battery compartment includes a bottom plate 100 and a "U"-shaped fixed structure arranged on the bottom plate. The "U"-shaped fixed structure includes a fixed bottom wall 200 and fixed side walls 300 arranged in parallel on both sides of the fixed bottom wall 200. The other end of the fixed side wall 300 is provided with a movable baffle 400 parallel and opposite to the fixed bottom wall 200. The distance between the movable baffle 400 and the fixed bottom wall 200 is adjusted by moving and locking the position of the movable baffle 400 to realize the adjustment of the battery compartment size.

[0025] As Figure 2 shown, in terms of the locking method of the movable baffle, the movable baffle 400 is movably connected to the fixed side wall 300 through a pressure adjusting bolt 410 at its end. The pressure adjusting bolt 410 passes through the movable baffle 400 and is screwed into the cross section of the fixed side wall 300. A position fixing bolt 420 is also arranged between the movable baffle 400 and the bottom plate 100. The position fixing bolt 420 passes through the bottom plate 100 and abuts against the long strip-shaped fixing hole at the bottom of the movable baffle 400.

[0026] In the present utility model, there is no special restriction on the applicability of the battery cells. A number of square battery cells are stacked in the battery compartment, and the square battery cells are soft-pack battery cells or aluminum-shell battery cells. If the square battery cell is a lithium-ion battery cell, the lithium-ion battery cell is a lithium iron phosphate battery cell, a lithium manganese oxide battery cell, or a lithium cobalt oxide battery cell. If the square battery cell is a sodium-ion battery cell, the sodium-ion battery cell is a polyanion battery cell, a layered oxide battery cell, or a Prussian material battery cell. Specifically, the square battery cells are electrically connected by series connection, parallel connection, or series-parallel connection and grouping.

[0027] In the present utility model, to ensure structural stability, the sheet metal box body is a metal box body, and the metal box body is a stainless steel box body or an aluminum alloy box body.

[0028] At the same time, to meet the buffering of the fluctuations in the thickness of the fine battery, an EVA board for tightness adjustment is movably embedded between the movable baffle and the adjacent battery cell.

[0029] To facilitate the fixed installation of the energy storage battery pack, the bottom plate of the sheet metal box body is further provided with fixing holes for fixing the sheet metal box body, and the fixing holes are arranged outside the two ends of the bottom plate.

[0030] In the description of the present utility model, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0032] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] The above embodiments are only specific embodiments of the present utility model, and the description thereof is relatively specific and detailed. However, it should not be construed as limiting the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can be made, and these obvious replacement forms all belong to the protection scope of the present utility model.

Claims

1. A sheet metal box structure of an energy storage battery with adjustable battery compartment size, comprising a sheet metal box body, wherein a battery compartment is arranged inside the sheet metal box body, and it is characterized in that: The battery compartment includes a bottom plate and a "U"-shaped fixing structure arranged on the bottom plate. The "U"-shaped fixing structure includes a fixed bottom wall and fixed side walls arranged in parallel on both sides of the fixed bottom wall. The other end of the fixed side wall is provided with a movable baffle parallel and opposite to the fixed bottom wall. The distance between the movable baffle and the fixed bottom wall is adjusted by moving the position of the movable baffle and locking to achieve the adjustment of the size of the battery compartment.

2. The structure of the energy storage battery sheet metal box with adjustable battery compartment size according to claim 1, characterized in that: The movable baffle is movably connected to the fixed side wall through a pressure adjustment bolt at its end. The pressure adjustment bolt penetrates the movable baffle and is screwed into the cross-section of the fixed side wall.

3. The structure of the energy storage battery sheet metal box with adjustable battery compartment size according to claim 2, wherein: A position fixing bolt is also arranged between the movable baffle and the bottom plate. The position fixing bolt penetrates the bottom plate and abuts against a long strip-shaped fixing hole at the bottom of the movable baffle.

4. The structure of the energy storage battery sheet metal box with adjustable battery compartment size according to claim 3, characterized in that: A number of square battery cells are stacked in the battery compartment. The square battery cells are soft-pack battery cells or aluminum-shell battery cells.

5. The structure of the energy storage battery sheet metal box with adjustable battery compartment size according to claim 4, characterized in that: The square battery cells are electrically connected by series connection, parallel connection or series-parallel connection.

6. The structure of the energy storage battery sheet metal box with adjustable battery compartment size according to claim 5, characterized in that: The sheet metal box body is a metal box body. The metal box body is a stainless steel box body or an aluminum alloy box body.

7. The structure of the energy storage battery sheet metal box with adjustable battery compartment size according to claim 6, characterized in that: An EVA board for tightening adjustment is movably embedded between the movable baffle and the adjacent battery cell.

8. The structure of the sheet metal box for energy storage battery with adjustable battery compartment size according to claim 7, characterized in that: The bottom plate of the sheet metal box body is also provided with fixing holes for fixing the sheet metal box body. The fixing holes are arranged outside the two ends of the bottom plate.

9. The structure of the sheet metal box for energy storage battery with adjustable battery compartment size according to claim 8, characterized in that: The square battery cells are lithium-ion battery cells. The lithium-ion battery cells are lithium iron phosphate battery cells, lithium manganate battery cells or lithium cobalt oxide battery cells.

10. The structure of the energy storage battery sheet metal box with adjustable battery compartment size according to claim 8, characterized in that: The square battery cells are sodium-ion battery cells. The sodium-ion battery cells are polyanion battery cells, layered oxide battery cells or Prussian material battery cells.

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