Energy storage box and electric device

Abstract

An energy storage box and an electric device, relating to the technical field of batteries. The energy storage box comprises: a box body, the box body being provided with an accommodating cavity; a cover plate, the cover plate comprising a plate body and a connecting portion surrounding and connected to the plate body, and the plate body being connected to the box body and covering the accommodating cavity; and a lapping member connected to part of the side edge of the box body and connected to the connecting portion. After the box body is normally connected to the cover plate, part of the side edge of the box body is connected to the connecting portion on the cover plate by means of the lapping member. When an explosion occurs inside a device, due to the connection effect of the lapping member on the box body and the cover plate, it can be ensured that the cover plate will not fly off the box body due to the pressure of explosion gas, thereby improving the safety of the energy storage box during use.

Description

Energy storage box and electric equipment

[0001] The present application claims priority to the Chinese patent application No. 2024227498931, filed on November 11, 2024, and entitled "Energy storage box and electric equipment", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application belongs to the technical field of batteries, and particularly relates to an energy storage box and an electric equipment. BACKGROUND

[0003] The energy storage box generally has multiple batteries inside. When the batteries are in an extreme situation such as thermal runaway, the internal gas generation rate accelerates, and most of the generated gas is flammable and explosive. Accumulation of too much gas may cause the energy storage box to explode, which will increase the pressure inside the box and cause the cover plate installed on the box to fly off, reducing safety. SUMMARY

[0004] The present application aims to overcome the technical problem that the cover plate installed on the energy storage box flies off when the energy storage box explodes. Another object of the present application is to provide an electric equipment.

[0005] TECHNICAL SOLUTION The energy storage box according to an embodiment of the present application comprises:

[0006] a box body, the box body being provided with a receiving cavity;

[0007] a cover plate, the cover plate comprising a plate body and a connecting portion connected to the plate body, the plate body being connected to the box body, and the cover plate being arranged in the receiving cavity;

[0008] a lapping piece, the lapping piece being connected to part of the side edges of the box body and connected to the connecting portion.

[0009] In some embodiments, the energy storage box comprises a flange, the flange being arranged around the box body, and the flange being connected to the box body and the plate body, respectively.

[0010] The lapping piece is connected to part of the side edges of the box body through the flange.

[0011] In some embodiments, the energy storage box comprises multiple fixing pieces and multiple limiting pieces, the multiple fixing pieces being connected to the plate body and the flange, respectively, the multiple limiting pieces being connected to the lapping piece and the connecting portion, respectively, and the extension direction of the fixing pieces intersecting the extension direction of the limiting pieces.

[0012] In some embodiments, the lapping piece comprises:

[0013] A first lap joint is located on a side of the flange away from the plate body and connected to the flange.

[0014] A second lap joint is connected to the first lap joint and located on a side of the connecting portion facing the box and connected to the connecting portion.

[0015] In some embodiments, along the thickness direction of the box, the flange has a first hole, the lap joint has a second hole corresponding to the first hole, and the plate body has a third hole corresponding to the first hole.

[0016] The energy storage box further comprises:

[0017] A fixing member is arranged through the first hole and the second hole to connect the flange and the lap joint.

[0018] In some embodiments, along the thickness direction of the box, the flange has a first hole, the lap joint has a second hole corresponding to the first hole, and the plate body has a third hole corresponding to the first hole.

[0019] The energy storage box further comprises:

[0020] A fixing member is arranged through the first hole, the second hole and the third hole to connect the plate body, the flange and the lap joint.

[0021] In some embodiments, the second hole is a waist-shaped hole extending in a direction facing the box.

[0022] In some embodiments, the flange and the lap joint are in an integral structure.

[0023] In some embodiments, the energy storage box further comprises a plurality of battery monomers arranged in the accommodating cavity.

[0024] The energy storage box comprises:

[0025] A box body is provided with an accommodating cavity.

[0026] A cover plate comprises a plate body and a connecting portion connected to the plate body, the plate body is connected to the box body and covers the accommodating cavity.

[0027] A lap joint is connected to at least part of the side edge of the box body and connected to the connecting portion.

[0028] A power utilization device comprises the energy storage box.

[0029] Beneficial effects: the energy storage box of the embodiment of the present application comprises: a box body provided with a containing cavity; a cover plate comprising a plate body and a connecting portion connected to the plate body, the plate body being connected to the box body and the cover being arranged in the containing cavity; and a lapping piece connected to part of the side edges of the box body and connected to the connecting portion. After the box body and the cover plate are normally connected, part of the side edges of the box body and the connecting portion on the cover plate are connected through the lapping piece. When an explosion occurs in the interior of the device, due to the connecting effect of the lapping piece on the box body and the cover plate, the cover plate can be ensured from being extruded by the explosion gas to fly out of the box body, thereby improving the safety during use of the energy storage box.

[0030] The embodiment of the present application provides a kind of electric equipment, including the energy storage box described above, the electric equipment has all the technical features and beneficial effects of the energy storage box described above, here no more tedious, it is not described again. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0032] Fig. 1 is an exploded structural schematic diagram of the energy storage box provided by the embodiment of the present application;

[0033] Fig. 2 is a schematic diagram of the overall structure of the energy storage box provided by the embodiment of the present application;

[0034] Fig. 3 is a schematic diagram of the box body structure provided by the embodiment of the present application with one lapping piece;

[0035] Fig. 4 is a schematic diagram of the box body structure provided by the embodiment of the present application with multiple lapping pieces;

[0036] Fig. 5 is a schematic diagram of the structure provided by the embodiment of the present application with another shape of lapping piece;

[0037] Fig. 6 is a schematic diagram of the structure provided by the embodiment of the present application with a third shape of lapping piece;

[0038] Fig. 7 is a schematic diagram of the structure provided by the embodiment of the present application with a fourth shape of lapping piece;

[0039] Fig. 8 is a schematic diagram of the overall structure of the energy storage box from another perspective provided by the embodiment of the present application;

[0040] Fig. 9 is an exploded view of the energy storage box from another perspective provided by the embodiment of the present application;

[0041] Fig. 10 is a perspective view of the lapping piece provided by the embodiment of the present application;

[0042] Figure 11 is a cross-sectional structural diagram of the box and cover plate provided in the embodiment of this application;

[0043] Figure 12 is a partial enlarged view of area A in Figure 11 provided in an embodiment of this application.

[0044] Reference numerals: 10-box body; 11-receiving cavity; 12-opening; 13-flanged edge; 131-first surface; 132-first hole; 20-cover plate; 21-plate body; 211-third hole; 22-connecting part; 30-overlapping part; 31-second surface; 32-first overlapping part; 33-second overlapping part; 34-second hole; 40-fixing part; 50-cell battery; 60-limiting part; X-thickness direction; Y-length direction; Z-width direction. Detailed Implementation

[0045] The technical solutions of the embodiments of this application 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 this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0046] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0047] Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" means one, two, or more, unless otherwise explicitly specified.

[0048] As an introduction to the embodiments of this application, an energy storage box is introduced, specifically an electrochemical energy storage box. Electrochemical energy storage boxes are often used in scenarios involving frequent human activity, making their safety particularly important. In extreme situations such as thermal runaway, the lithium battery installed inside the electrochemical energy storage box experiences accelerated gas generation, and most of the generated gases are flammable and explosive. Excessive accumulation may lead to a dangerous situation such as an explosion of the energy storage box. An explosion would increase the pressure inside the box, potentially causing the cover plate installed on the box to detach and fly off, injuring nearby personnel and reducing safety.

[0049] In view of this, embodiments of this application provide an energy storage box for accommodating individual battery cells, thereby overcoming at least one of the aforementioned technical problems.

[0050] Please refer to Figures 1, 2 and 3. In this embodiment of the application, the energy storage box includes a box body 10, a cover plate 20 and an overlap member 30.

[0051] The housing 10 is the main component of the energy storage box, playing a crucial role in housing and connecting other components. Inside the housing 10 is a receiving cavity 11 for storing or protecting stored items or equipment. The size and shape of this receiving cavity 11 can be designed according to actual needs.

[0052] The cover plate 20 includes a plate body 21 and a connecting part 22 surrounding and connected to the plate body 21. The plate body 21 is connected to the box body 10 and covers the receiving cavity 11 of the box body 10. The cover plate 20 can completely cover the receiving cavity 11, effectively sealing the receiving cavity 11, preventing foreign objects from entering the box body 10, and ensuring the safety and integrity of the internal installation structure of the receiving cavity 11.

[0053] The lap joint 30 is connected to a portion of the side of the housing 10 and to the connecting part 22. The lap joint 30 increases the structural strength and stability of the connection between the housing 10 and the cover plate 20. Based on the connection between the plate 21 and the housing 10, the lap joint 30 further connects a portion of the side of the housing 10 to the connecting part 22 of the cover plate 20. This connection method provides additional structural support. When an explosion occurs inside the housing 10 and the internal pressure increases, in addition to the original connection structure between the housing 10 and the plate 21 bearing part of the explosion pressure, the lap joint 30 can also share and bear a portion of the load, ensuring that the cover plate 20 will not detach from the housing 10 and fly out, thus improving safety and increasing the overall strength and stability of the energy storage tank. Even if a large pressure is generated from an explosion inside the housing 10, potentially damaging the original connection structure between the housing 10 and the cover plate 20 and creating a gap that could lead to separation, some of the explosion pressure can be released through this gap. The overlapping member 30 can fully withstand the remaining pressure, ensuring that the cover plate 20 does not detach from the housing 10 and fly out, injuring nearby personnel and improving the safety of the energy storage box. Simultaneously, even if the cover plate 20 is subjected to external pressure, the overlapping member 30 can share and bear some of the load, reducing the degree of deformation of the cover plate 20 and improving the overall strength of the energy storage box. Furthermore, the overlapping member 30 provides additional sealing. When the cover plate 21 is tightly connected to the housing 10, the connecting part 22 of the cover plate 20 is connected to the housing 10 through the overlapping member 30, which acts as an additional waterproof and sealing structure. It prevents moisture, dust, and other impurities from entering the energy storage box, protecting the safety and integrity of the internal contents.

[0054] Please refer to Figures 3, 4, 5, 6, and 7. In some embodiments, the housing 10 includes a flange 13, which surrounds the housing 10 and connects to both the housing 10 and the plate 21. The overlapping member 30 connects to a portion of the side of the housing 10 via the flange 13. Since the sidewalls of the energy storage housing 10 are generally designed to be thin, the contact area between the cover plate 20 and the housing 10 is small when the cover plate 20 is placed on it. By providing the flange 13 on the housing 10, the contact area between the flange 13 and the cover plate 20 is larger, making it easier to connect the cover plate 20 to the flange 13 via the connecting structure, thus facilitating the connection between the cover plate 20 and the housing 10. The flange 13 provides stronger structural support and stability for the connection between the cover plate 20 and the housing 10. The flanges 13 are all located at the opening 12 of the housing 10, forming a surrounding arrangement that provides support for the installation of the cover plate 20.

[0055] There is one overlapping member 30, and the overlapping member 30 is connected to at least one flange 13. If the energy storage box has only one overlapping member 30, it will be connected to at least one flange 13. The overlapping member 30 can be a straight strip structure (as shown in Figures 3 and 4), an L-shaped structure (as shown in Figure 5), a U-shaped structure (as shown in Figure 6), or even a square-shaped structure (as shown in Figure 7), and can be connected to at least one flange 13. This connection method increases the structural strength of the energy storage box and ensures a firm connection between the cover plate 20 and the box body 10. Alternatively, there can be multiple overlapping members 30, each overlapping member 30 connected to at least one flange 13. The shapes of the multiple overlapping members 30 can also be straight strip structures, L-shaped structures, U-shaped structures, or square-shaped structures, etc. Multiple overlapping parts 30 can be spaced out, which can greatly improve the stability of the connection between the flange 13 and the connecting part 22. In other words, the connection between the box body 10 and the cover plate 20 is further improved by the connection of multiple flanges. In the event of an explosion inside the energy storage box, the cover plate 20 can be prevented from detaching from the box body 10 and flying out.

[0056] When the overlapping member 30 is a straight strip structure, an L-shaped structure, or a U-shaped structure, the overlapping member 30 can be connected to part of the side of the box body 10 through the flange 13. When the overlapping member 30 is a U-shaped structure, the overlapping member 30 can be connected to all the side of the box body 10 through the flange 13.

[0057] Please refer to Figures 1, 3, 11, and 12. In some embodiments, the energy storage box includes multiple fasteners 40 and multiple limiting members 60. The multiple fasteners 40 are respectively connected to the plate 21 and the flange 13, and the multiple limiting members 60 are respectively connected to the overlapping member 30 and the connecting portion 22. The extending directions of the fasteners 40 and the limiting members 60 intersect. It is understood that both the fasteners 40 and the limiting members 60 can be bolt structures. The plate 21 of the cover plate 20 is connected by multiple fasteners 40 and the flange 13, and the multiple fasteners 40 extend in the same direction during use. The connecting portion 22 of the cover plate 20 is connected by the limiting members 60 and the overlapping member 30, and the multiple limiting members 60 extend in the same direction during use. After the cover plate 20 is connected to the box body 10 by the multiple fasteners 40 and the multiple limiting members 60, the extending directions of the fasteners 40 and the limiting members 60 intersect. Preferably, their extending directions are perpendicular to each other. When an explosion occurs inside the energy storage box, the gas produced by the explosion will compress the cover plate 20. Because the fastener 40 has good tensile strength, it ensures a stable connection between the plate 21 and the flange 13. The limiting member 60 has good shear strength, ensuring a stable connection between the connecting part 22 and the overlapping member 30. This ensures the stability of the connection between the cover plate 20 and the box body 10, preventing the cover plate 20 from detaching from the box body 10 and flying out during an explosion, thus improving the safety of the structure during explosion venting. Based on the above description, in practical use, the fastener 40 can be a connector with relatively good tensile strength, while the limiting member 60 can be a connector with relatively good shear strength.

[0058] Referring to Figures 8, 9, and 10, in some embodiments, the overlapping member 30 includes a first overlapping portion 32 and a second overlapping portion 33. The first overlapping portion 32 is located on the side of the flange 13 away from the plate 21 and is connected to the flange 13. The flange 13 and the first overlapping portion 32 can be parallel to each other, allowing for a larger contact area when they are connected, facilitating the installation of the connection structure, reducing the difficulty of connection, and also making the connection between the first overlapping portion 32 and the flange 13 more secure. The second overlapping portion 33 is connected to the first overlapping portion 32, and is located on the side of the connecting portion 22 facing the housing 10 and is connected to the connecting portion 22. The second overlapping portion 33 can be parallel to a portion of the connecting portion 22 (that is, the portion where the connecting portion 22 contacts the second overlapping portion 33). This parallel arrangement also increases the contact area, reduces the difficulty of connection, and makes the connection between the second overlapping portion 33 and the connecting portion 22 more secure.

[0059] The first overlapping portion 32 and the second overlapping portion 33 can be connected by welding or as an integral structure, which can improve the overall robustness of the overlapping part 30. When the flange 13 is connected to the connecting part 22 through the interconnected first overlapping portion 32 and the second overlapping portion 33, the robustness of the connection between the flange 13 and the connecting part 22 can be improved, thereby further ensuring that the cover plate 20 will not detach from the box body 10 and fly out when an explosion occurs inside the energy storage box.

[0060] Referring to Figures 11 and 12, in some embodiments, along the thickness direction X of the housing 10, the flange 13 has a first hole 132, and the overlapping member 30 has a second hole 34 corresponding to and communicating with the first hole 132. The energy storage box also includes a fastener 40, which can be used to tightly connect the flange 13 and the overlapping member 30, providing stronger structural support and stability. The fastener 40 is typically a screw, bolt, or other connecting structure.

[0061] The fastener 40 has a first hole 132 and a second hole 34 to connect the flange 13 and the overlapping member 30. The first hole 132 passes through the flange 13 along the thickness direction X of the housing 10, allowing the fastener 40 to pass through and connect to the flange 13. The second hole 34, corresponding to the first hole 132, is located on the overlapping member 30, also along the thickness direction X of the housing 10, and matches the position of the first hole 132. This structure ensures that the fastener 40 can pass through the first hole 132 and the second hole 34 to connect the flange 13 and the overlapping member 30. The flange 13 is then connected to the cover plate 20 via the overlapping member 30, making the entire energy storage box structure more robust and stable.

[0062] Referring to Figures 11 and 12, in some embodiments, along the thickness direction X of the housing 10, the flange 13 has a first hole 132, the overlapping member 30 has a second hole 34 corresponding to the first hole 132, and the plate 21 has a third hole 211 corresponding to the first hole 132. The energy storage box also includes fasteners 40 for connecting the plate 21, flange 13, and overlapping member 30. These fasteners 40 are typically screws, bolts, or other connecting structures. Since the third hole 211, the first hole 132, and the second hole 34 are sequentially connected, the fasteners 40 pass through the third hole 211, the first hole 132, and the second hole 34, respectively connecting to the plate 21, flange 13, and overlapping member 30, thereby connecting the plate 21, flange 13, and overlapping member 30 into a whole through the fasteners 40. The fastener 40 securely connects these parts, thus ensuring the strength and stability of the connection between the housing 10 and the cover plate 20, and preventing the cover plate 20 from detaching from the housing 10 and flying off due to other factors.

[0063] Referring to Figures 11 and 12, in some embodiments, the second hole 34 is an oblong hole that extends toward the housing 10. The oblong hole is formed on the overlapping member 30 along the thickness direction X of the housing 10.

[0064] If the overlapping part 30 is connected to the flange 13 and is located along the length Y of the box body 10, then the waist-shaped hole extends along the length Y of the box body 10. When the overlapping part 30 is connected to the flange 13, the position of the overlapping part 30 can be moved and adjusted along the length Y of the box body 10 so that the overlapping part 30 and the connecting part 22 on the cover plate 20 fit tightly together, thereby improving the firmness of the connection between the overlapping part 30 and the connecting part 22 and avoiding the connection being weak due to the gap between the two.

[0065] If the overlapping member 30 is connected to the flange 13 and is located along the width direction Z of the box body 10, then the waist-shaped hole extends along the width direction Z of the box body 10. When the overlapping member 30 is connected to the flange 13, the position of the overlapping member 30 can be moved and adjusted along the width direction Z of the box body 10, so that the overlapping member 30 fits tightly with the connecting part 22 on the cover plate 20, which also improves the firmness of the connection between the overlapping member 30 and the connecting part 22. This implementation method can be seen in Figures 11 and 12.

[0066] Referring to Figures 1, 3, and 4, in some embodiments, the flange 13 and the overlap 30 are an integral structure. This means they are tightly connected, forming a single unit. The integral nature of the flange 13 and the overlap 30 indicates that they share the load, making the entire energy storage box more robust and stable. Due to the absence of separate seams or connection points, this structure provides better compressive strength and torsional resistance. The integration of the flange 13 and the overlap 30 also provides better sealing and protection. Because there are no gaps or seams, objects cannot pass between them, providing superior waterproofing, dustproofing, and corrosion resistance.

[0067] Referring to Figure 1, in some embodiments, the energy storage box also includes multiple battery cells 50 disposed within a receiving cavity 11. The receiving cavity 11 is an area within the energy storage box specifically designed for the battery cells 50. It allows for the installation of multiple battery cells 50 and provides necessary support and isolation. By placing the battery cells 50 within the receiving cavity 11, effective battery management and protection can be achieved. Each battery cell 50 can be fixed and positioned within the receiving cavity 11, thus preventing collisions and movement between them. Furthermore, the receiving cavity 11 can provide relatively constant temperature and environmental conditions to ensure the normal operation and lifespan of the battery cells 50. The energy storage box may also include cooling systems and protection devices associated with the battery cells 50. These systems and devices can help monitor and regulate the temperature of the battery cells 50 to ensure they operate within safe ranges. They can also provide functions such as short-circuit protection, overcharge protection, and over-discharge protection to ensure the safe use of the battery cells 50 and the reliability of the overall energy storage system.

[0068] This application also provides an electrical device including an energy storage box as described above. This electrical device possesses all the technical features and beneficial effects of an energy storage box, which will not be elaborated further here.

[0069] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0070] The energy storage box and electrical equipment provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An energy storage box, characterized in that, include: The box (10) is provided with a receiving cavity (11); Cover plate (20), the cover plate (20) includes a plate body (21) and a connecting part (22) surrounding and connected to the plate body (21), the plate body (21) is connected to the box body (10) and covers the receiving cavity (11); The overlapping part (30) is connected to a portion of the side of the housing (10) and is connected to the connecting part (22).

2. The energy storage box according to claim 1, characterized in that, The energy storage box includes a flange (13), which surrounds the box body (10) and is connected to the box body (10) and the plate (21) respectively; The overlapping member (30) is connected to a portion of the side of the box body (10) via the flange (13).

3. The energy storage box according to claim 2, characterized in that, The energy storage box includes multiple fixing members (40) and multiple limiting members (60). The multiple fixing members (40) are respectively connected to the plate (21) and the flange (13), and the multiple limiting members (60) are respectively connected to the overlapping member (30) and the connecting part (22). The extending direction of the fixing member (40) intersects with the extending direction of the limiting member (60).

4. The energy storage box according to claim 2, characterized in that, The overlapping member (30) includes: The first overlapping part (32) is located on the side of the flange (13) away from the plate (21) and is connected to the flange (13); The second overlapping part (33) is connected to the first overlapping part (32). The second overlapping part (33) is located on the side of the connecting part (22) facing the box (10) and is connected to the connecting part (22).

5. The energy storage box according to claim 2, characterized in that, Along the thickness direction (X) of the box body (10), the flange (13) has a first hole (132), and the overlapping member (30) has a second hole (34) corresponding to the first hole (132); The energy storage tank also includes: A fastener (40) passes through the first hole (132) and the second hole (34) to connect the flange (13) and the overlap (30).

6. The energy storage box according to claim 2, characterized in that, Along the thickness direction (X) of the box body (10), the flange (13) has a first hole (132), the overlapping member (30) has a second hole (34) corresponding to the first hole (132), and the plate (21) has a third hole (211) corresponding to the first hole (132); The energy storage tank also includes: A fastener (40) passes through the first hole (132), the second hole (34) and the third hole (211) to connect the plate (21), the flange (13) and the overlapping member (30).

7. The energy storage box according to claim 6, characterized in that, The second hole (34) is an oblong hole that extends toward the housing (10).

8. The energy storage box according to claim 2, characterized in that, The flange (13) and the overlapping member (30) are an integral structure.

9. The energy storage box according to claim 1, characterized in that, The energy storage box also includes multiple battery cells (50), which are disposed within the receiving cavity (11).

10. An electrical appliance, characterized in that, Includes the energy storage box as described in any one of claims 1 to 9.

11. An energy storage box, characterized in that, include: The box (10) is provided with a receiving cavity (11); Cover plate (20), the cover plate (20) includes a plate body (21) and a connecting part (22) surrounding and connected to the plate body (21), the plate body (21) is connected to the box body (10) and covers the receiving cavity (11); The overlapping member (30) is connected to at least a portion of the side of the housing (10) and is connected to the connecting part (22).

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