Battery box and battery pack

Abstract

The application relates to a battery box and a battery pack, a battery box body, an end cover and a hoisting piece. The box body comprises side plates and turnups. A plurality of side plates surround the height direction of the battery box to form a containing cavity with an open end. Each adjacent two side plates intersect to form a corner. The turnup is located at the open end and is bent towards the outside of the box body and connected to the side plate. The end cover covers the open end and is fixed with the turnup. The hoisting piece is located outside the containing cavity and is arranged at the corner. The hoisting piece is fixed with the two side plates forming the corner. The scheme of the application ensures the installation stability and reliability of the hoisting piece through the double-side fixing mode, thereby ensuring the safety of the hoisting operation of the battery box. Meanwhile, the space area occupied by the turnup is reasonably utilized for the layout of the hoisting piece, the space volume independently occupied by the hoisting piece is significantly reduced, and the optimization and reduction of the overall space occupied by the battery box are realized.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to battery boxes and battery packs. Background Technology

[0002] Battery packs are widely used in automobiles and other fields as power supply devices. The battery box, as a crucial component of the battery pack, serves to support and protect the battery modules. Related technologies incorporate lifting lugs on the battery box to facilitate battery pack transport. However, these lugs only function during transport, and their placement increases the overall space occupied by the battery box, resulting in a larger space requirement for battery pack applications. Utility Model Content

[0003] Therefore, it is necessary to provide a battery box and battery pack to address the issue of the large space occupied by the battery box.

[0004] In a first aspect, this application proposes a battery box, comprising:

[0005] The housing includes side panels and flanges. Multiple side panels surround the battery box in the height direction to form a receiving cavity with an open end. Each pair of adjacent side panels intersects to form a corner. The flange is located at the open end and is bent outwards from the housing and connected to the side panel.

[0006] End cap, covering the open end and fixed to the flange; and

[0007] A lifting component is located outside the receiving cavity and is disposed at the corner. The lifting component is fixed to the two side plates forming the corner.

[0008] In some embodiments, the hoisting component includes a first fixing part and a second fixing part, one end of which is fixed to different side plates respectively, and the other ends of which extend away from the corresponding corner and fit together to form a fitting end, wherein the fitting end is provided with a hanging hole.

[0009] In some embodiments, the first fixing part and the second fixing part are welded to the side plate.

[0010] In some embodiments, along the height direction, the projection of the hoisting member lies within the projection range of the flange.

[0011] In some embodiments, the flange includes an intersecting first fold segment and a second fold segment, the first fold segment intersecting and extending outward from the side panel and connecting to the end cap; the second fold segment intersecting and extending away from the corresponding end cap.

[0012] In some embodiments, the battery box further includes a sealing gasket and fasteners, and the periphery of the end cover is provided with a fixed edge; the sealing gasket is disposed between the fixed edge and the flange along the height direction, and the fasteners securely connect the fixed edge, the sealing gasket and the flange.

[0013] In some embodiments, the battery box further includes a pressure strip connected to the fixed edge on the side opposite to the sealing gasket, and the fastener passes through the pressure strip.

[0014] In some embodiments, the end cap includes a bottom cap and a top cap, and the two ends of the housing in the height direction are an upper open end and a lower open end, respectively. The top cap covers the upper open end, and the bottom cap covers the lower open end.

[0015] In some embodiments, the bottom cover is provided with reinforcing ribs.

[0016] In some embodiments, the flange located at the lower open end is a lower flange, the bottom cover includes a lower edge fixed to the lower flange, the lower edge is recessed to form a first groove, the lower flange is recessed to form a second groove, and the first groove and the second groove are connected and aligned along the height direction.

[0017] In some embodiments, the battery box further includes a support assembly disposed within the receiving cavity. The support assembly includes a partition and a bracket. The partition connects to the box body and divides the internal space of the box body into two sub-cavities arranged along the height direction. Each sub-cavity is provided with the bracket. The bracket is fixed to the partition and forms an exhaust channel between the bracket and the partition. The bracket is provided with a clearance hole communicating with the exhaust channel.

[0018] The housing is provided with a pressure relief hole, which connects the exhaust channel and the outside of the housing.

[0019] In some embodiments, the partition plate is provided with a connecting hole that connects the exhaust passages on both sides.

[0020] In some embodiments, the partition intersects with the projection of the hoisting member in the same plane parallel to the height direction.

[0021] In some embodiments, the support assembly further includes a fireproof component disposed on the bracket and located within the exhaust channel, the fireproof component blocking the clearance hole.

[0022] In some embodiments, each of the brackets is provided with a limiting post, the limiting post being located on the side of the bracket away from the partition; a plurality of limiting posts are provided around each of the clearance holes, the plurality of limiting posts forming a limiting space for limiting the battery cell.

[0023] In some embodiments, each of the brackets is provided with a support column, which is located on the side of the bracket facing the partition and is fixed to the partition.

[0024] Secondly, this application proposes a battery pack, including a battery cell and the battery box described in the first aspect, wherein the battery cell is disposed inside the battery box.

[0025] Compared with the prior art, this application has the following beneficial effects:

[0026] The aforementioned battery box and battery pack feature lifting components at the external corners of the battery box, securely connected to both side panels. This double-sided fixing method ensures the stability and reliability of the lifting components, thereby guaranteeing the safety of battery box lifting operations. Simultaneously, the box body is equipped with a flanged structure that securely connects to the end caps. This design not only improves the reliability of the end caps' fixation but also effectively enhances the airtightness of the housing. Furthermore, by rationally utilizing the space occupied by the flanges for the layout of the lifting components, the individual space occupied by each lifting component is significantly reduced, thus optimizing and reducing the overall space occupied by the battery box. Attached Figure Description

[0027] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0028] Figure 1 This is a schematic diagram of the external shape of the battery box in some embodiments;

[0029] Figure 2 for Figure 1 An exploded view of the battery box shown;

[0030] Figure 3 for Figure 1 Another exploded view of the battery box shown;

[0031] Figure 4 for Figure 1 The diagram shows the internal structure of the battery box.

[0032] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0033] Figure 6 for Figure 4 Enlarged view of point B in the middle;

[0034] Figure 7 These are schematic diagrams of the support structure in some embodiments;

[0035] Figure 8 for Figure 7 Another view of the bracket.

[0036] The reference numerals in the detailed embodiments are as follows:

[0037] 100. Battery box; 10. Box body; R. Receiving cavity; R1. Sub-cavity; 11. Side plate; G. Corner; D. Open end; D1. Upper open end; D2. Lower open end; 12. Flanged edge; 12a. First fold; 12b. Second fold; 12A. Upper flange; 12B. Lower flange; C2. Second groove; 13. Pressure relief hole; 20. End cap; 21. Top cover; 22. Bottom cover; 22a. Reinforcing rib; 20a. Fixing edge; a 1. Lower edge; C1. First groove; 30. Lifting component; 31. First fixing part; 32. Second fixing part; T. Fitting end; 33. Hanging hole; 40. Sealing gasket; 50. Fastener; 60. Pressure strip; 70. Support assembly; 71. Partition; 71a. Connecting hole; 72. Bracket; 72a. Clearance hole; P. Exhaust channel; 73. Fireproof component; 74. Limiting post; k. Limiting space; 75. Supporting post; 76. Adhesive layer. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0039] In the description of this application, it should be understood that, where they appear, the terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] Furthermore, where applicable, 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., shall be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral part; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; they may refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] It should be noted that, if an element is described as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is described as "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0044] This application addresses the problem of increased space occupation caused by the installation of lifting lugs on battery boxes by proposing a new battery box and battery pack.

[0045] The battery pack in this embodiment includes a battery box and individual battery cells, with the individual battery cells housed within the battery box. An individual battery cell is the smallest unit in the battery where an electrochemical reaction occurs; it can be a secondary battery or a primary battery. The individual battery cell can be a lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The individual battery cell can be cylindrical, flat, cuboid, or other shapes.

[0046] In some embodiments, the battery cell includes a housing, an end cap, and an electrode assembly. The housing and the end cap together form an internal space for accommodating the electrode assembly. Specifically, a receiving cavity may be formed within the housing, with at least one end open. The end cap closes the open end of the housing to seal the receiving cavity, and the electrode assembly is mounted within the receiving cavity. The housing may be, but is not limited to, a metal housing, such as an aluminum housing or a steel housing.

[0047] Electrode assemblies typically include a positive electrode, a negative electrode, and a separator separating the positive and negative electrodes. An electrolyte can be injected into the battery cell, wetting the interior of the electrode assembly and providing ion migration pathways for electrochemical reactions, as well as conducting electricity. Electrode assemblies can be in the form of wound, stacked, etc. One or more electrode assemblies can be installed within a single battery cell.

[0048] The battery box in the embodiments of this application is described below.

[0049] Please refer to Figure 1 and Figure 2 The battery box 100 proposed in this embodiment includes a box body 10, an end cap 20, and a lifting component 30. The box body 10 includes side plates 11 and flanges 12. Multiple side plates 11 surround the battery box 100 in the height direction Z to form a receiving cavity R with an open end D. Every two adjacent side plates 11 intersect to form a corner G. The flange 12 is located at the open end D and is bent towards the outside of the box body 10 and connected to the side plate 11. The end cap 20 covers the open end D and is fixed to the flange 12. The lifting component 30 is located outside the receiving cavity R and is disposed at the corner G. The lifting component 30 is fixed to the two side plates 11 forming the corner G.

[0050] Generally, multiple side panels 11 are arranged along a square trajectory to form a square housing 10. A receiving cavity R is used to accommodate individual battery cells, with at least one end open to form an open end D, and a flange 12 located at the open end D. In one embodiment, both ends of the receiving cavity R are open ends D, and the housing 10 is provided with end caps 20 at both open ends D. In another embodiment, one end of the receiving cavity R is an open end D, and the housing 10 is provided with an end cap 20 only at this open end D. When the end cap 20 covers the open end D, it seals the open end D and is fixedly connected to the housing 10 via the flange 12 of the open end D.

[0051] For each open end D, the flange 12 can be continuously extended along the circumference of the open end D, or it can be discontinuously arranged in multiple segments along the circumference of the open end D. Optionally, the flange 12 is integrally connected to the side plate 11, and is obtained by bending the side plate 11. Alternatively, the flange 12 is separately fixedly connected to the side plate 11 (e.g., by welding). It is easy to understand that the flange 12 protrudes slightly from the side plate 11 away from the outside of the receiving cavity R. Generally, in order to reduce the weight and space occupied by the battery box 100, the wall thickness of the side plate 11 is not large. Providing the flange 12 at the end of the side plate 11 increases the contact area between the end cover 20 and the box body 10, which not only facilitates the installation of the end cover 20, but also makes the connection between the two more reliable and the airtightness of the receiving cavity R higher.

[0052] The lifting component 30 is used to cooperate with an external lifting device to facilitate the lifting of the battery box 100 and the transportation of the battery box 100. The specific structure of the lifting component 30 can be conventionally designed and is not limited here. Two adjacent side plates 11 intersect to form a corner G. The lifting component 30 can be installed at each corner G. Alternatively, the lifting component 30 can be installed at some corners G, as long as it can balance the lifting of the battery box 100. Taking the side plates 11 enclosing a square trajectory as an example, the box 10 has four corners G, and a lifting component 30 is installed at each corner G.

[0053] Understandably, both the lifting component 30 and the flange 12 extend beyond the side plate 11. Thus, in the plane perpendicular to the height direction Z of the battery box 100, the lifting component 30 and the flange 12 share a certain space. In other words, the arrangement of the lifting component 30 utilizes the space occupied by the flange 12, thereby reducing the space occupied by the lifting component 30 alone and reducing the space occupied by the battery box 100.

[0054] In this embodiment, the battery box 100 has a lifting component 30 at the external corner G, which is firmly connected to both side plates 11. This double-sided fixing method ensures the installation stability and reliability of the lifting component 30, thereby guaranteeing the safety of lifting operations. Simultaneously, the box body 10 is equipped with a flange 12 structure that is firmly connected to the end cover 20. This design not only improves the fixing reliability of the end cover 20 but also effectively enhances the airtightness of the accommodating cavity R. Furthermore, by rationally utilizing the space occupied by the flange 12 for the layout of the lifting component 30, the independent space volume occupied by the lifting component 30 is significantly reduced, thereby optimizing and reducing the overall space occupied by the battery box 100.

[0055] In some embodiments, please refer to Figure 1 The lifting component 30 includes a first fixing part 31 and a second fixing part 32. One end of each part is fixed to a different side plate 11, and the other end of each part extends away from the corresponding corner G and fits together to form a fitting end T. The fitting end T is provided with a hanging hole 33.

[0056] The first fixing part 31 and the second fixing part 32 can be connected to the side plate 11 by bolts, riveting, welding, etc. The mating end T formed by the first fixing part 31 and the second fixing part 32 is provided with at least one hanging hole 33. In practical applications, the hook of the lifting device hooks onto the hanging hole 33 to lift the battery box 100. The parts of the first fixing part 31 and the second fixing part 32 that form the mating end T can be connected by bolts, riveting, welding, etc. After the first fixing part 31 and the second fixing part 32 are mated, a triangular stability is formed, and the hanging hole 33 is located on the angle bisector, ensuring the shortest force path at the lifting point, improving lifting stability, and allowing the hanging hole 33 to be located on the outside, facilitating operation and maintenance.

[0057] In practical applications, the first fixing part 31 and the second fixing part 32 can be designed with identical structures, simplifying the design, manufacturing, and installation of the lifting component 30 through mass production. By setting the first fixing part 31 and the second fixing part 32 with identical structures to be fixed to the side plate 11 respectively, the lifting force can be distributed through the box side plate, reducing local stress and avoiding side plate deformation compared to setting a single point for lifting on the side plate.

[0058] Preferably, the first fixing part 31 and the second fixing part 32 are welded to the side plate 11. Specifically, the welding rods formed between the first fixing part 31 and the side plate 11, and between the second fixing part 32 and the side plate 11, extend along the edges of the first fixing part 31 and the second fixing part 32, respectively. This not only facilitates the welding operation but also results in a large welding area and a more reliable connection. Simultaneously, it also facilitates the synchronous welding of the housing 10 with the first fixing part 31 and the second fixing part 32, improving production efficiency. In some embodiments, along the height direction Z, the projection of the lifting component 30 is located within the projection range of the flange 12. In this case, the installation of the lifting component 30 does not additionally increase the planar space occupied by the battery box 100, saving space occupied by the battery box 100.

[0059] In some embodiments, refer to Figure 2 The flange 12 includes a first fold segment 12a and a second fold segment 12b that intersect and connect. The first fold segment 12a intersects and connects with the side plate 11 and extends outward toward the outer side of the housing 10. The first fold segment 12a connects with the end cap 20. The second fold segment 12b intersects and connects with the first fold segment 12a and extends away from the corresponding end cap 20.

[0060] Can the first fold segment 12a extend outward from the casing 10 along the horizontal direction of the height Z of the battery box 100, and the second fold segment 12b extend towards the side of the side panel 11 along the height Z of the battery box 100, with both folded together to form an L-shaped flange 12. The first fold segment 12a can be integrally connected to the side panel 11, obtained by bending the side panel 11. Alternatively, the first fold segment 12a can be fixedly connected to the end of the side panel 11.

[0061] The end cap 20 is fixed to the first fold 12a. The second fold 12b can improve the strength of the flange 12 and reduce the risk of deformation of the flange 12 due to external impact. By extending the second fold 12b away from the corresponding end cap 20, the height space occupied by the side plate 11 can be used to arrange the second fold 12b, saving the space occupied by the battery box 100 in the height direction Z.

[0062] Preferably, the second fold 12b is arranged perpendicularly to the first fold 12a, or the second fold 12b is arranged at an acute angle to the first fold 12a (i.e., the second fold 12b extends towards the side plate 11), so that the second fold 12b does not increase the space occupied by the battery box 100 on the horizontal plane.

[0063] Of course, in other embodiments, the flange 12 may also include only the first fold 12a.

[0064] In some embodiments, continue to refer to Figure 2 and Figure 5 The battery box 100 also includes a sealing gasket 40 and a fastener 50. The periphery of the end cover 20 is provided with a fixed edge 20a, and the sealing gasket 40 is disposed between the fixed edge 20a and the flange 12 along the height direction Z. The fastener 50 securely connects the fixed edge 20a, the sealing gasket 40 and the flange 12. Thus, the design of the flange 12 not only improves rigidity but also ensures the uniformity of the compression of the sealing gasket 40.

[0065] The fixed edge 20a can be continuously or intermittently arranged along the periphery of the end cover 20, as long as it corresponds to the position of the flange 12. The width of the fixed edge 20a (the dimension perpendicular to its extension direction) is generally designed to be equal to the width of the flange 12 (the dimension perpendicular to its extension direction). A sealing gasket 40 is provided between the flange 12 and the fixed edge 20a. In one embodiment, the fixed edge 20a, the flange 12, and the sealing gasket 40 are all circular and adapted in shape, and multiple fasteners 50 are evenly spaced along the circumference of the fixed edge 20a, so that the connection between the end cover 20 and the housing 10 can be well sealed.

[0066] Fastener 50 can be a structure that uses screws, bolts, rivets, etc., to securely connect the fixing edge 20a, sealing gasket 40, and flange 12 together. Generally, for ease of assembly and disassembly of the battery box 100, fastener 50 is made of easily removable threaded parts.

[0067] At this time, the airtightness of the battery box 100 can be effectively improved by the cooperation of the fixed edge 20a, the sealing gasket 40 and the flange 12 to form a sealing structure of a specific width.

[0068] In some embodiments, continue to refer to Figure 2 and Figure 5The battery box 100 also includes a pressure strip 60, which is connected to the side of the fixed edge 20a away from the sealing gasket 40, and the fastener 50 passes through the pressure strip 60.

[0069] The pressure strip 60 can be made of rigid or flexible material. Generally, the pressure strip 60 is made of metal. The pressure strip 60 extends longitudinally along the extension direction of the fixed edge 20a in a strip shape. The pressure strip 60 can extend to match the shape of the fixed edge 20a, or it can be arranged only in the area where the fastener 50 is located.

[0070] The pressure strip 60 is provided with connecting holes for fasteners 50 to pass through. The fasteners 50 press the pressure strip 60 against the fixed edge 20a. This not only distributes the tightening force of the fasteners 50 evenly across the fixed edge 20a, resulting in a tighter fit between the fixed edge 20a, the sealing gasket 40, and the flange 12, thus improving the sealing effect, but also prevents the fixed edge 20a from being worn by the fasteners 50, as the fasteners 50 press against the pressure strip 60 rather than directly against the fixed edge 20a. Even if the pressure strip 60 is worn, it is easy to replace, reducing the maintenance cost of the battery box 100.

[0071] In some embodiments, refer to Figure 1 The end cap 20 includes a bottom cap 22 and an upper cap 21. The two ends of the box body 10 in the height direction Z are the upper open end D1 and the lower open end D2, respectively. The upper cap 21 covers the upper open end D1, and the bottom cap 22 covers the lower open end D2.

[0072] Both the bottom cover 22 and the top cover 21 are end covers 20. The bottom cover 22 is located at the bottom of the housing 10 and covers the lower open end D2 of the housing 10. The top cover 21 is located at the top of the housing 10 and covers the upper open end D1 of the housing 10. Both the upper open end D1 and the lower open end D2 are provided with flanges 12 that are fixedly connected to the top cover 21 and the bottom cover, respectively. Generally, the flanges 12 at the upper open end D1 and the flanges 12 at the lower open end D2 coincide in the projection along the height direction Z of the battery box 100.

[0073] At this point, the battery box 100 is assembled from the box body 10, the bottom cover 22 and the top cover 21, and has a simple and reliable structure.

[0074] In one embodiment, combined with Figure 3 It is understood that a reinforcing rib 22a is provided on the bottom cover 22. Specifically, the reinforcing rib 22a may be formed by a local recess in the bottom cover 22, or it may be formed by a reinforcing member independently connected to the bottom cover 22.

[0075] During transportation, the bottom of the battery box 100 is easily impacted. The reinforcing rib 22a on the bottom cover 22 can improve the strength of the bottom cover 22, enhance the impact resistance of the battery box 100, and prevent the bottom cover 22 from being dented and damaging the internal components of the battery box 100.

[0076] In another embodiment, reference is made to Figure 1 The flange 12 located at the lower open end D2 is a lower flange 12B. The bottom cover 22 includes a lower edge a1 fixed to the lower flange 12B. The lower edge a1 is recessed to form a first groove C1, and the lower flange 12B is recessed to form a second groove C2. The first groove C1 and the second groove C2 are connected and aligned along the height direction Z.

[0077] If the lower flange 12B only includes the first fold 12a, the second groove C2 is formed by the inward indentation of the first fold 12a. If the lower flange 12B includes the first fold 12a and the second fold 12b, the second groove C2 is formed by the inward indentation of both the first fold 12a and the second fold 12b.

[0078] The first groove C1 and the second groove C2 are aligned along the height direction Z and are interconnected, forming a complete limiting groove structure. In practical applications, a limiting component is preset in the battery box 100 installation area. When the lifting equipment hoists the battery box 100 and transfers it to the target installation position, if the limiting component is detected to be embedded in the limiting groove, it can be determined that the battery box 100 is in place. Through the synergistic effect of the limiting groove and the limiting component, the real-time monitoring function of the battery pack's installation status can be effectively realized. At the same time, the fitting structure of the limiting component and the limiting groove can also provide reliable positioning support and spatial constraint for the battery box 100 at the installation position, ensuring the accuracy of its installation position.

[0079] In some embodiments, refer to Figure 4 and Figure 5 The battery box 100 also includes a support assembly 70 disposed within the receiving cavity R. The support assembly 70 includes a partition 71 and a bracket 72. The partition 71 connects to the box body 10 and divides the internal space of the box body 10 into two sub-cavities R1 arranged along the height direction Z. Each sub-cavity R1 is provided with a bracket 72, which is fixed to the partition 71 and forms an exhaust channel P between the bracket 72 and the partition 71. The bracket 72 is provided with a clearance hole 72a communicating with the exhaust channel P. The box body 10 is provided with a pressure relief hole 13, which communicates with the exhaust channel P and the outside of the box body 10.

[0080] Each battery cell is equipped with an explosion-proof valve to release pressure in the event of thermal runaway. A partition 71 is installed inside the housing 10, dividing the internal space of the housing 10 into two sub-cavities R1 arranged vertically. Each sub-cavity R1 is equipped with a bracket 72, which is mounted on the partition 71. The bracket 72 is used to install the battery cell. The explosion-proof valve on the battery cell is positioned facing the clearance hole 72a of the upper bracket 72. When thermal runaway occurs in the battery cell, the heat inside the battery cell enters the exhaust channel P through the explosion-proof valve and the clearance hole 72a.

[0081] Generally, a pressure relief valve (not shown) is installed at the pressure relief hole 13. When the gas pressure in the exhaust channel P accumulates to a certain level, the pressure relief valve opens, and the gas in the exhaust channel P is discharged from the housing 10 through the pressure relief hole 13.

[0082] At this point, the partition 71 divides the internal space of the battery box 100, allowing the vertically arranged battery cells to discharge high-temperature gases through the central exhaust channel P, effectively preventing thermal runaway from spreading between battery cells and improving the reliability of the battery pack. Furthermore, the battery box 100 can accommodate a large number of battery cells, resulting in a high energy density for the battery pack. Simultaneously, the partition 71 enhances the structural strength of the box 10.

[0083] In some embodiments, refer to Figure 6 The partition 71 is provided with a connecting hole 71a that connects the two exhaust channels P. At this time, the two exhaust channels P are connected through the connecting hole 71a on the partition 71, and the high-temperature flue gas can flow in the two exhaust channels P through the connecting hole 71a, which prolongs the time for the exhaust channel P to reach the pressure relief threshold of the pressure relief structure, avoids premature pressure relief of the battery box 100, and prolongs the service life of the battery pack.

[0084] In some embodiments, combined with Figure 4 It is understood that the projections of the partition 71 and the lifting component 30 in the same plane in the parallel height direction Z intersect. That is, the height space occupied by the partition 71 and the lifting component 30 in the height direction Z overlaps. Preferably, the center height of the partition 71 is set at the same height as the center height of the lifting component 30.

[0085] Clearly, the partition 71 is positioned approximately in the middle of the housing 10, effectively enhancing the structural strength of the central region. In this configuration, the lifting component 30 is correspondingly positioned in the central region of the housing 10. When the lifting device uses the lifting component 30 to lift the battery box 100, the resulting stress is concentrated in the stronger central region of the housing 10. Because this central region possesses greater resistance to external forces, the safety of the battery box 100 lifting process is improved, and the risk of damage to the housing 10 is reduced.

[0086] In some embodiments, refer to Figure 6 The support assembly 70 also includes a fireproof component 73, which is located on the bracket 72 and inside the exhaust channel P. The fireproof component 73 blocks the clearance hole 72a.

[0087] The fireproof component 73 is made of refractory material and is usually in sheet form. For example, the fireproof component 73 can be a mica sheet. The fireproof component 73 is arranged on one side of the support 72 to form the exhaust channel P, avoiding interference with the arrangement of battery cells. It is also provided with a corresponding clearance hole 72a. When the explosion-proof valve of one of the battery cells opens and releases high-temperature fumes, the instantaneous air pressure and temperature of the high-temperature fumes released by the explosion-proof valve are usually high enough to destroy the fireproof component 73 directly opposite it and enter the exhaust channel P. After the high-temperature fumes enter the exhaust channel P, the air pressure and temperature decrease, preventing them from destroying the fireproof components 73 directly opposite other battery cells. Consequently, they cannot enter the sub-cavity R1 through the clearance hole 72a, thus avoiding affecting other battery cells and preventing heat spread.

[0088] Optionally, the fireproof component 73 is attached to the bracket 72.

[0089] In some embodiments, refer to Figure 7 Each bracket 72 is provided with a limiting post 74, which is located on the side of the bracket 72 away from the partition plate 71. Multiple limiting posts 74 are provided around each clearance hole 72a, and the multiple limiting posts 74 enclose a limiting space k for limiting the battery cell.

[0090] The limiting post 74 can be cylindrical or other shapes. Multiple limiting posts 74 are arranged at intervals around each clearance hole 72a, and a limiting space k is defined by these multiple limiting posts 74 to limit the installation of the battery cell, so that the explosion-proof valve of the battery cell is accurately aligned with the clearance hole 72a and the battery cell is prevented from shifting.

[0091] In one example, the battery cell is cylindrical, and multiple limiting posts 74 arranged around the clearance hole 72a form a circular limiting space k.

[0092] In some embodiments, refer to Figure 8 Each bracket 72 is provided with a support column 75, which is located on the side of the bracket 72 facing the partition 71 and is fixed to the partition 71.

[0093] Specifically, the bracket 72 is mounted on the partition 71 via a support column 75 to separate the partition 71 from the bracket 72, forming an exhaust channel P. The support column 75 can be cylindrical, elongated, or the like. The support column 75 and the partition 71 can be snap-fitted, welded, or bonded. Preferably, an adhesive layer 76 is provided at the end of the support column 75 facing away from the bracket 72, and the adhesive layer 76 bonds the support column 75 and the partition 71.

[0094] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0095] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art will find that, without departing from the concept of this application, [the following is a more detailed explanation of the embodiments described].

[0096] It should be noted that several modifications and improvements can be made, all of which fall within the scope of protection of this application.

[0097] Therefore, the scope of protection of this patent application shall be determined by the appended claims.

Claims

1. A battery box (100), characterized in that, include: The housing (10) includes side panels (11) and flanges (12). A plurality of side panels (11) surround the battery box (100) in the height direction (Z) to form a receiving cavity (R) with an open end (D). Each pair of adjacent side panels (11) intersects to form a corner (G). The flanges (12) are located at the open end (D) and are bent outwards from the housing (10) to connect to the side panels (11). End cap (20), covering the open end (D) and fixed to the flange (12); and A lifting component (30) is located outside the receiving cavity (R) and disposed at the corner (G), the lifting component (30) being fixed to the two side plates (11) forming the corner (G).

2. The battery box (100) according to claim 1, characterized in that, The hoisting component (30) includes a first fixing part (31) and a second fixing part (32). One end of each part is fixed to different side plates (11), and the other end of each part extends away from the corresponding corner (G) and fits together to form a fitting end (T). The fitting end (T) is provided with a hanging hole (33). The first fixing part (31) and the second fixing part (32) are welded to the side plate (11).

3. The battery box (100) according to claim 1, characterized in that, Along the height direction (Z), the projection of the hoisting component (30) is within the projection range of the flange (12).

4. The battery box (100) according to claim 1, characterized in that, The flange (12) includes a first fold (12a) and a second fold (12b) that intersect and connect. The first fold (12a) intersects and connects with the side plate (11) and extends outward toward the box body (10). The first fold (12a) connects with the end cap (20). The second fold (12b) intersects and connects with the first fold (12a) and extends away from the corresponding end cap (20).

5. The battery box (100) according to claim 1, characterized in that, The battery box (100) also includes a sealing gasket (40) and a fastener (50). The periphery of the end cover (20) is provided with a fixed edge (20a). The sealing gasket (40) is disposed between the fixed edge (20a) and the flange (12) along the height direction (Z). The fastener (50) fastens the fixed edge (20a), the sealing gasket (40) and the flange (12).

6. The battery box (100) according to claim 5, characterized in that, The battery box (100) also includes a pressure strip (60), which is connected to the side of the fixed edge (20a) away from the sealing gasket (40), and the fastener (50) passes through the pressure strip (60).

7. The battery box (100) according to claim 1, characterized in that, The end cap (20) includes a bottom cap (22) and an upper cap (21). The two ends of the box body (10) in the height direction (Z) are an upper open end (D1) and a lower open end (D2), respectively. The upper cap (21) covers the upper open end (D1), and the bottom cap (22) covers the lower open end (D2). The bottom cover (22) is provided with a reinforcing rib (22a); and / or, the flange (12) located at the lower open end (D2) is a lower flange (12B), the bottom cover (22) includes a lower edge (a1) fixed to the lower flange (12B), the lower edge (a1) is recessed to form a first groove (C1), the lower flange (12B) is recessed to form a second groove (C2), the first groove (C1) and the second groove (C2) are connected and aligned along the height direction (Z).

8. The battery box (100) according to claim 1, characterized in that, The battery box (100) further includes a support assembly (70) disposed in the receiving cavity (R). The support assembly (70) includes a partition (71) and a bracket (72). The partition (71) connects to the box body (10) and divides the internal space of the box body (10) into two sub-cavities (R1) arranged along the height direction (Z). Each sub-cavity (R1) is provided with the bracket (72). The bracket (72) is fixed to the partition (71) and forms an exhaust channel (P) between the bracket (72) and the partition (71). The bracket (72) is provided with a clearance hole (72a) communicating with the exhaust channel (P). The housing (10) is provided with a pressure relief hole (13), which connects the exhaust channel (P) and the outside of the housing (10); The partition (71) is provided with a connecting hole (71a) that connects the exhaust channels (P) on both sides; The projection of the partition (71) and the hoisting component (30) in the same plane parallel to the height direction (Z) intersects.

9. The battery box (100) according to claim 8, characterized in that, The support assembly (70) further includes a fireproof component (73), which is disposed on the bracket (72) and located within the exhaust channel (P), and the fireproof component (73) blocks the clearance hole (72a); and / or, Each of the brackets (72) is provided with a limiting post (74), the limiting post (74) being located on the side of the bracket (72) opposite to the partition plate (71); each of the clearance holes (72a) is surrounded by a plurality of limiting posts (74), the plurality of limiting posts (74) forming a limiting space (k) for limiting the battery cell; and / or, Each of the brackets (72) is provided with a support column (75), which is located on the side of the bracket (72) facing the partition (71) and is fixed to the partition (71).

10. A battery pack, characterized in that, It includes a battery cell and a battery case (100) as described in any one of claims 1-9, wherein the battery cell is disposed within the battery case (100).

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