Battery box, battery pack and electric equipment

Abstract

The embodiment of the utility model provides a battery box, a battery pack and electric equipment. The battery box comprises a box body which is provided with an accommodating space and an opening communicated with the accommodating space; the top cover is buckled on the opening; the cross beam is used for arranging a lifting lug, the cross beam is located in the containing space and connected with the side wall of the containing space, the cross beam is provided with a first containing cavity, and at least one end of the first containing cavity extends to the end face of the cross beam; and the first reinforcing piece is arranged in the first accommodating cavity. The battery box in the embodiment of the utility model is used for achieving the effect of improving the impact resistance.

Description

Technical Field

[0001] This application relates to the field of new energy technology, and in particular to a battery box, battery pack and electrical equipment. Background Technology

[0002] With the development of science and technology and the ever-increasing demand for energy, new energy sources are constantly developing, and the application of battery packs is becoming increasingly widespread. Battery packs are typically used to provide power and consist of a battery box and battery cells. The interior of the battery box is used for the arrangement and installation of the battery cells, as well as for their protection and cooling. However, battery boxes have poor resistance to compression, making battery packs prone to fire and explosion. Utility Model Content

[0003] This application provides a battery box, a battery pack, and electrical equipment to improve the resistance to compression.

[0004] In a first aspect, embodiments of this application provide a battery box, comprising:

[0005] The box has a receiving space and an opening communicating with the receiving space;

[0006] The top cover is fastened onto the opening;

[0007] A crossbeam is used to install lifting lugs. The crossbeam is located within the receiving space and is connected to the side wall of the receiving space. The crossbeam is provided with a first receiving cavity, at least one end of which extends to the end face of the crossbeam.

[0008] The first reinforcing member is disposed within the first receiving cavity.

[0009] In some possible implementations, at least one of the first reinforcing members is disposed within the first receiving cavity, and the extending direction of the first reinforcing member is the same as the extending direction of the first receiving cavity.

[0010] And / or, the crossbeam is roll-formed;

[0011] And / or, with a plane perpendicular to the extension direction of the crossbeam as the cross section, the cross section shape of the crossbeam is a H-shaped ring, and the thickness of the crossbeam is 1.2mm~1.8mm;

[0012] And / or, the beam is made of DP980;

[0013] And / or, with a plane perpendicular to the extension direction of the first reinforcing member as the cross-section, the cross-sectional shape of the first reinforcing member is a rectangular ring, and the thickness of the first reinforcing member is 2.5mm~3.5mm;

[0014] And / or, the material of the first reinforcing member is B1500HS.

[0015] In some possible implementations, the housing includes:

[0016] The base plate is disposed opposite to the top cover along a first direction;

[0017] A side frame is disposed between the top cover and the bottom plate, and at least a portion of the side frame is provided with a second receiving cavity;

[0018] The battery box also includes:

[0019] The second reinforcing member is disposed within the second receiving cavity.

[0020] In some possible implementations, the side frame includes: a first frame, a second frame, a third frame and a fourth frame connected end to end in sequence, wherein the first frame and the third frame both extend along the length direction of the battery box and are each provided with the second receiving cavity;

[0021] The second reinforcing member includes:

[0022] The first reinforcing body is disposed within the second receiving cavity of the first frame and the third frame.

[0023] In some possible implementations, both the first frame and the third frame are provided with a first reinforcing member, the extension direction of the first reinforcing member is the same as the extension direction of the corresponding second receiving cavity, and it is located in the middle region of the corresponding second receiving cavity;

[0024] And / or, taking a plane perpendicular to the extension direction of the first frame as a cross-section, the cross-sectional shape of the first frame is a rectangular ring, and the thickness of the first frame is 0.8mm~1.2mm;

[0025] And / or, taking a plane perpendicular to the extension direction of the third frame as a cross-section, the cross-sectional shape of the third frame is a rectangular ring, and the thickness of the third frame is 0.8mm~1.2mm;

[0026] And / or, the material of both the first frame and the third frame is DP780;

[0027] And / or, taking a plane perpendicular to the extension direction of the first reinforcing body as the cross-section, the cross-sectional shape of the first reinforcing body is a rectangular ring, and the thickness of the first reinforcing body is 1.2mm~1.8mm;

[0028] And / or, the material of the first reinforcement is HC340LA.

[0029] In some possible implementations, both the second frame and the fourth frame extend along the width direction of the battery box and are provided with the second receiving cavity;

[0030] The second reinforcing member also includes:

[0031] The second reinforcing body is disposed within the second receiving cavity of the second frame and / or the fourth frame.

[0032] In some possible implementations, the second frame and / or the fourth frame are respectively provided with two second reinforcing members, the two second reinforcing members extending in the same direction as the extension direction of the corresponding second receiving cavity, and located at opposite ends of the corresponding second receiving cavity along the first direction;

[0033] And / or, with a plane perpendicular to the extension direction of the second frame as the cross-section, the cross-sectional shape of the second frame is a rectangular ring, and the thickness of the second frame is 1mm~1.5mm;

[0034] And / or, with a plane perpendicular to the extension direction of the fourth frame as the cross-section, the cross-sectional shape of the fourth frame is a rectangular ring, and the thickness of the fourth frame is 1mm~1.5mm;

[0035] And / or, the material of the second frame and the fourth frame is HC340LA;

[0036] And / or, with a plane perpendicular to the extension direction of the second reinforcement as the cross-section, the cross-sectional shape of the second reinforcement is a rectangular ring, and the thickness of the second reinforcement is 1.2mm~1.8mm;

[0037] And / or, the material of the second reinforcement is DP980.

[0038] In some possible implementations, the base plate includes: a cooling plate, a support member, a protective plate, and a coating arranged in sequence, the cooling plate being adjacent to the side frame;

[0039] The protective plate is provided with a reinforcing rib on the side facing the support member, and the gap between the reinforcing rib and the flow channel of the cooling plate is opposite.

[0040] And / or, the top cover includes:

[0041] Galvanized sheet;

[0042] An electrophoretic layer covers the surface of the galvanized sheet;

[0043] A powder coating layer covers the surface of the electrophoretic layer.

[0044] Secondly, embodiments of this application provide a battery pack, including a battery box as described above, and battery cells disposed within the battery box.

[0045] Thirdly, embodiments of this application provide an electrical device including the battery pack described above.

[0046] The battery box, battery pack, and electrical equipment provided in this application include a box body, a top cover, a crossbeam, and a first reinforcing member. The box body has an accommodating space and an opening communicating with the accommodating space. The top cover is fastened to the opening. The crossbeam is used to install lifting lugs, is located within the accommodating space, and is connected to the side wall of the accommodating space. The crossbeam has a first accommodating cavity, at least one end of which extends to the end face of the crossbeam. The first reinforcing member is disposed within the first accommodating cavity. By providing a first reinforcing member within the crossbeam, the crossbeam's resistance to compression can be improved, its compression deformation reduced, and the internal space of the crossbeam fully utilized, thus improving space utilization. Attached Figure Description

[0047] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0048] Figure 1 A schematic diagram of the battery pack provided in this application;

[0049] Figure 2 Exploded view of the battery pack provided in this application;

[0050] Figure 3 A schematic diagram of the side frame, crossbeam, and partition provided in this application;

[0051] Figure 4 for Figure 3 A partial view of point A in the middle;

[0052] Figure 5 for Figure 3 A partial view of point B in the middle;

[0053] Figure 6 for Figure 3 A partial view at point C in the middle;

[0054] Figure 7 A partial view of the first frame provided in this application.

[0055] Explanation of reference numerals in the attached figures:

[0056] 10-Top cover;

[0057] 20-cell;

[0058] 30 - Box;

[0059] 40 - Base plate; 41 - Cooling plate; 42 - Support component; 43 - Protective plate; 44 - Coating; 45 - Reinforcing rib;

[0060] 50 - Side frame; 51 - First frame; 52 - Second frame; 53 - Third frame; 54 - Fourth frame; 55 - Second receiving cavity;

[0061] 60 - Crossbeam; 61 - First receiving cavity;

[0062] 70 - partition; 71 - third receiving cavity;

[0063] 81-First reinforcing body; 82-Second reinforcing body; 83-Third reinforcing body; 84-First reinforcing member;

[0064] 91-Battery Management System; 92-Battery Pack Circuit Breaker;

[0065] 100 - Outer frame.

[0066] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0067] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0068] In related technologies, battery boxes have poor impact resistance. When subjected to lateral compression, the crossbeams bear the compressive force, and if their strength is insufficient, they are prone to deformation, leading to battery pack fires and explosions. Furthermore, to increase the strength of the battery box, reinforcing ribs need to be installed on the sides of the crossbeams, resulting in low space utilization of the battery box.

[0069] Therefore, this application provides a battery box, battery pack, and electrical equipment. By providing a first receiving cavity in the crossbeam and a first reinforcing member in the first receiving cavity, the crossbeam's resistance to compression can be improved, the crossbeam's compression deformation can be reduced, and the internal space of the crossbeam can be fully utilized to improve space utilization.

[0070] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0071] This application provides an electrical device, including electric vehicles, electric trains, electric bicycles, golf carts, mobile phones, portable devices, laptops, electric toys, power tools, and ships. The electric vehicles include pure electric vehicles, hybrid electric vehicles, and range-extended electric vehicles.

[0072] The aforementioned electrical equipment includes a battery pack, which is used to store and provide electrical energy. The battery pack is, for example, a lithium-ion battery pack, which has high specific energy per cell and low internal resistance, resulting in good driving range. The embodiments of this application do not limit the specific type of battery pack; it can be selected as needed.

[0073] See Figures 1 to 7 The battery pack may include a battery box and battery cells 20. The battery box is used to hold the battery cells 20, such as blade cells. Multiple battery cells 20 can be provided, and multiple battery cells 20 can be assembled into a battery module, which in turn forms a battery pack; that is, the battery pack is integrated using a CTM (Cell to Module) method. Multiple battery cells 20 can also be directly assembled into a battery pack; that is, the battery pack is integrated using a CTP (Cell to Pack) method.

[0074] Continue reading Figures 1 to 7 The battery box includes a box body 30, a top cover 10, a crossbeam 60, and a first reinforcing member 84. The box body 30 has an accommodating space and an opening communicating with the accommodating space. The top cover 10 is fastened to the opening to seal it. The crossbeam 60 is used to install lifting lugs. The crossbeam 60 is located in the accommodating space and is connected to the side wall of the accommodating space. The crossbeam 60 is provided with a first accommodating cavity 61. At least one end of the first accommodating cavity 61 extends to the end face of the crossbeam 60. The first reinforcing member 84 is disposed in the first accommodating cavity 61.

[0075] like Figures 1 to 3 As shown, the housing 30 has a receiving space to accommodate structures such as the battery cell 20, the battery management system 91 (BMS), and the battery disconnect unit 92 (BDU). For example, the battery housing includes a partition 70 disposed within the receiving space, dividing the receiving space into at least two chambers. The battery cell 20 and the battery management system 91 are disposed in different chambers, and the battery cell 20 and the battery disconnect unit 92 are disposed in different chambers. The battery disconnect unit 92 may be disposed in the same chamber as the battery management system 91.

[0076] In some possible implementations, such as Figure 1As shown, the top cover 10 is connected to the housing 30, for example, via threaded fasteners. The top cover 10 also faces the opening to seal it, for example, the top cover 10 completely covers the opening. The top cover 10 includes a galvanized sheet, an electrophoretic coating, and a powder-coated coating to provide triple corrosion protection, improving the overall corrosion resistance of the battery pack and enabling it to successfully pass the salt spray tests of QSQR S9-30-2023 and QSQR T1-172-20. Thus, the battery pack is less prone to rust when facing various humidity levels, acidic and alkaline environments, and harsh road conditions, extending its service life.

[0077] Galvanized steel sheet refers to steel sheet with a zinc coating, which improves corrosion resistance. The specific material of galvanized steel sheet can be DC54D+Z. An electrophoretic coating covers the surface of the galvanized steel sheet, providing good corrosion and impact resistance. The thickness of the electrophoretic coating is 28μm~32μm, for example, 30μm. A powder coating covers the surface of the electrophoretic coating to improve the strength and corrosion resistance of the top cover 10. The thickness of the powder coating is 55μm~65μm, for example, 60μm, and the material of the powder coating is, for example, polyvinyl chloride (PVC).

[0078] In some possible implementations, see [reference] Figure 1 and Figure 2 The housing 30 includes a base plate 40 and side frames 50, which together form an accommodating space. One end of the side frame 50 facing away from the base plate 40 forms an opening. The base plate 40 is the bottom structure of the battery pack, used to support the battery cells 20 and provide protection for them. The base plate 40 and the top cover 10 are positioned opposite each other along a first direction; for example, the base plate 40 and the top cover 10 are directly opposite each other along the first direction. The first direction is, for example, the thickness direction (also the height direction) of the battery pack. Figure 1 The Z direction is shown.

[0079] Understandably, the battery pack is installed at the bottom of the vehicle, with a ground clearance of approximately 20cm. When encountering mountainous or uneven terrain, the battery pack is easily impacted. The base plate 40, as the bottom structure of the battery pack, enhances bottom protection and reduces the risk of spontaneous combustion due to impacts to the bottom of the battery pack.

[0080] In some possible implementations, such as Figure 2 As shown, the base plate 40 includes a cooling plate 41, a support member 42, a protective plate 43, and a coating 44, which are stacked sequentially. The cooling plate 41 is adjacent to the side frame 50. The protective plate 43 has a reinforcing rib 45 on the side facing the support member 42. The gap between the reinforcing rib 45 and the flow channel of the cooling plate 41 is opposite. Using the above-mentioned base plate 40, the battery pack did not catch fire or explode when subjected to tests such as a 120J bottom impact and a 4.9m drop.

[0081] The cooling plate 41 is located adjacent to the side frame 50 to cool the battery cell 20 and other components, preventing them from overheating. The cooling plate 41 can be connected to the side frame 50, for example, via rivet nuts. The cooling plate 41 has internal flow channels; for example, the cooling plate 41 is brazed, resulting in a simpler structure, fewer parts, easier assembly, and better reliability. The flow channels can be designed in a meandering pattern to increase their length and improve the cooling effect on the battery cell 20. The cooling medium within the flow channels includes air, water, mineral oil, etc. The cooling plate 41 can be, for example, a liquid-cooled plate.

[0082] The cooling plate 41 is also provided with an inlet and an outlet, which are respectively connected to both ends of the flow channel to allow the cooling medium to enter and exit. There may be one or more inlets, outlets, and flow channels, and each flow channel is connected to at least one inlet and outlet. The embodiments of this application do not limit the position, number, connection method, and arrangement of the flow channels, inlets, and outlets, and can be selected as needed.

[0083] Support members 42 are disposed between cooling plate 41 and guard plate 43, which are connected, for example, by rivet nuts. Further, cooling plate 41, guard plate 43, and side frame 50 are connected by rivet nuts. Multiple support members 42 may be provided, each support member 42 being elongated. Multiple support members 42 are spaced apart between cooling plate 41 and guard plate 43 to provide cushioning; the material of the support members 42 is, for example, foam.

[0084] In some possible examples, the material of the guard plate 43 can be hot-stamped steel, such as HC950 / 1300HS, which has good mechanical properties and formability. The surface of the guard plate 43 facing the cooling plate 41 has grooves to accommodate the support member 42. The side of the guard plate 43 facing the support member 42 also has reinforcing ribs 45, such as... Figure 2 As shown, the bottom wall of the groove is provided with reinforcing ribs 45.

[0085] The gap between the reinforcing rib 45 and the flow channel of the cooling plate 41 is opposite, that is, the reinforcing rib 45 and the flow channel are staggered, and the orthographic projection of the flow channel on the guard plate 43 does not overlap with the reinforcing rib 45. For example, the guard plate 43 is punched along the flow channel gap of the cooling plate 41 to form the reinforcing rib 45. Multiple reinforcing ribs 45 can be provided, and the extending direction of the reinforcing rib 45 intersects with the extending direction of the support member 42, for example, perpendicularly.

[0086] Coating 44 covers the surface of the protective plate 43 facing away from the cooling plate 41, for example, coating 44 covers the bottom surface of the protective plate 43. By providing coating 44, the rigidity and impact resistance of the base plate 40 can be improved, reducing the risk of battery pack failure due to impacts to the bottom. The material of coating 44 can be plastic, such as polyvinyl chloride (PVC). Coating 44 can be powder coated, and its thickness can be 0.8mm to 1.2mm, for example, coating 44 with a thickness of 1mm.

[0087] See Figures 2 to 5 A side frame 50 is disposed between the top cover 10 and the bottom plate 40 to connect the top cover 10 and the bottom plate 40. At least a portion of the side frame 50 is provided with a second receiving cavity 55. For example, the side frame 50 includes a first frame 51, a second frame 52, a third frame 53, and a fourth frame 54 connected end-to-end in sequence; that is, the side frame 50 is annular, for example, a rectangular ring. One end of the first frame 51 is connected to one end of the second frame 52, the other end of the second frame 52 is connected to one end of the third frame 53, the other end of the third frame 53 is connected to one end of the fourth frame 54, and the other end of the fourth frame 54 is connected to the other end of the first frame 51.

[0088] In other examples, one end of the first frame 51 and the third frame 53 are respectively connected to the two ends of the fourth frame 54. One end of the first frame 51 and the third frame 53 extends outward from the second frame 52. That is, the second frame 52 is not connected to the ends of the first frame 51 and the third frame 53, but is connected to the area near the ends.

[0089] The first frame 51 and the third frame 53 are arranged opposite to each other and can both extend along the length direction of the battery box, as shown in the figure. Figure 3 The Y direction is shown. In some possible examples, such as... Figure 2 , Figure 3 and Figure 7 As shown, both the first frame 51 and the third frame 53 are provided with a second receiving cavity 55. The two ends of the second receiving cavity 55 can extend to the opposite ends of the structure in which they are located, that is, the first frame 51 and / or the third frame 53 can be tubular.

[0090] The second frame 52 and the fourth frame 54 are arranged opposite to each other and can both extend along the width direction of the battery box, as shown in the image below. Figure 3 The X direction is shown. In some possible examples, such as... Figure 5 As shown, both the second frame 52 and the fourth frame 54 are provided with a second receiving cavity 55. The two ends of the second receiving cavity 55 can extend to the opposite ends of the structure in which they are located, that is, the second frame 52 and / or the fourth frame 54 can be tubular.

[0091] Continue reading Figures 2 to 4The crossbeam 60 is used to mount lifting lugs for assembly with the vehicle. Both ends of the crossbeam 60 are connected to two opposite side walls located in the accommodating space. For example, one end of the crossbeam 60 is connected to the first frame 51 (e.g., by welding), and the other end of the crossbeam 60 is connected to the third frame 53 (e.g., by welding). This crossbeam 60 is the main load-bearing beam, bearing lateral compressive force, pull-out force at the central lifting point, and expansion force from the battery cells 20 on both sides, requiring high compressive strength.

[0092] See Figure 4 The crossbeam 60 is provided with a first receiving cavity 61, at least one end of which extends to the end face of the crossbeam 60 to facilitate the installation of a first reinforcing member 84. The first reinforcing member 84 is disposed within the first receiving cavity 61. By providing the first reinforcing member 84 within the crossbeam 60, the compressive strength of the crossbeam 60 can be improved, the compressive deformation of the crossbeam 60 can be reduced, and the internal space of the crossbeam 60 can be fully utilized, thereby improving space utilization. The first reinforcing member 84 is installed into the first receiving cavity 61 of the crossbeam 60. By welding the notch at the end of the crossbeam 60, the first reinforcing member 84 is limited, simplifying assembly, improving reliability, and reducing costs.

[0093] In some possible examples, the crossbeam 60 is roll-formed to reduce production costs. The crossbeam 60 is made of steel, such as DP980, to increase its strength. For example, roll-formed steel for the crossbeam 60 has high strength and low cost, with material costs only one-third that of traditional aluminum, offering a significant cost advantage in large-scale production.

[0094] Taking a plane perpendicular to the extension direction of the crossbeam 60 as a cross section, the cross-sectional shape of the crossbeam 60 is a rectangular ring, and the thickness of the crossbeam 60 is 1.2mm to 1.8mm, for example, 1.5mm. For example, the crossbeam 60 includes a first tube and a second tube. The first tube is U-shaped, and its cross-section is a closed shape. The second tube is disposed on one side of the first tube, and both ends of the second tube are located on one side surface of the first tube, forming a U-shape with the first tube. The cross-section of the second tube is not closed, but it is closed by fitting with the first tube. The crossbeam 60 can also adopt other structures, which are not limited in this embodiment.

[0095] A first reinforcing member 84 is disposed within a first receiving cavity 61, and at least one first reinforcing member 84 is disposed within the first receiving cavity 61. The extending direction of the first reinforcing member 84 is the same as the extending direction of the first receiving cavity 61. For example, the first reinforcing member 84 is disposed within a second tube to improve the strength of the second tube. A plane perpendicular to the extending direction of the first reinforcing member 84 is used as a cross-section. The cross-sectional shape of the first reinforcing member 84 is a rectangular ring. The thickness of the first reinforcing member 84 is 2.5mm to 3.5mm, for example, 3mm. The material of the first reinforcing member 84 is B1500HS.

[0096] In the example where the crossbeam 60 is made of 1.5mm thick DP980 H-shaped roll-formed steel and the first reinforcing member 84 is made of 3mm thick B1500HS rectangular tube, the crossbeam 60 and the first reinforcing member 84 can prevent the battery pack from catching fire and exploding when facing a lateral compressive force of 200KN.

[0097] See Figure 3 , Figure 5 and Figure 7 In the example where the side frame 50 includes a first frame 51, a second frame 52, a third frame 53, and a fourth frame 54, the battery box also includes a second reinforcing member disposed within the second receiving cavity 55 to improve the impact resistance of the side frame 50 and to improve the space utilization of the battery box, making assembly simple.

[0098] For example, such as Figure 2 and Figure 7 As shown, the second reinforcing member includes a first reinforcing body 81, which is disposed within the second receiving cavity 55 of the first frame 51 and the third frame 53. Thus, the opposing surfaces of the first frame 51 and the third frame 53 are connected to the crossbeam 60, while the surfaces of the first frame 51 and the third frame 53 facing away from each other are subjected to lateral compression. The presence of the first reinforcing body 81 within both the first frame 51 and the third frame 53 improves their impact resistance.

[0099] The two ends of the second receiving cavity 55 within the first frame 51 extend to the opposite ends of the first frame 51 to facilitate the placement of the first reinforcing body 81. The first frame 51 is made of DP780 material to improve its strength. The first frame 51 can be roll-formed to reduce production costs. Taking a plane perpendicular to the extension direction of the first frame 51 as a cross-section, the cross-sectional shape of the first frame 51 is a rectangular ring, and the thickness of the first frame 51 is 0.8mm to 1.2mm, for example, 1mm.

[0100] The first frame 51 is provided with a first reinforcing member 81, the extension direction of which is the same as the extension direction of the second receiving cavity 55 of the first frame 51, and is located in the middle region of the second receiving cavity 55 of the first frame 51. Figure 7 As shown, a first reinforcing member 81 is provided in the middle of the first frame 51. The first reinforcing member 81 is installed into the second receiving cavity 55 of the first frame 51. The first reinforcing member 81 is limited by welding the notch at the end of the first frame 51. The assembly is simple, reliable and low cost.

[0101] The two ends of the second receiving cavity 55 within the third frame 53 extend to the opposite ends of the third frame 53 to facilitate the placement of the first reinforcing body 81. The third frame 53 is made of DP780 material to improve its strength. The third frame 53 can be roll-formed to reduce production costs. Taking a plane perpendicular to the extension direction of the third frame 53 as a cross-section, the cross-sectional shape of the third frame 53 is a rectangular ring, and the thickness of the third frame 53 is 0.8mm to 1.2mm, for example, 1mm.

[0102] The third frame 53 is provided with a first reinforcing member 81. The extension direction of the first reinforcing member 81 is the same as the extension direction of the second receiving cavity 55 of the third frame 53, and it is located in the middle region of the second receiving cavity 55 of the third frame 53. The first reinforcing member 81 is installed into the second receiving cavity 55 of the third frame 53. The first reinforcing member 81 is limited by welding the notch at the end of the third frame 53. The assembly is simple, reliable, and low in cost.

[0103] Continue reading Figure 2 and Figure 7 The first reinforcing body 81 has a rectangular ring cross-section, meaning it is a rectangular tube. The thickness of the first reinforcing body 81 is 1.2mm to 1.8mm, for example, 1.5mm. The material of the first reinforcing body 81 is HC340LA. For example, the first frame 51 and the first reinforcing body 81 are constructed by stacking a 1.0mm thick DP780 rectangular tube with a 1.5mm thick HC340LA rectangular tube. The third frame 53 and the first reinforcing body 81 are also constructed by stacking a 1.0mm thick DP780 rectangular tube with a 1.5mm thick HC340LA rectangular tube.

[0104] To further improve the compressive strength of the side frame 50, refer to Figure 3 and Figure 5 The second reinforcing member further includes a second reinforcing body 82, which is disposed within the second receiving cavity 55 of the second frame 52 and / or the fourth frame 54. For example, as shown... Figure 5 As shown, the second reinforcing member 82 is disposed within the second receiving cavity 55 of the second frame 52, while the second receiving cavity 55 of the fourth frame 54 does not contain the second reinforcing member 82. In other examples, the second reinforcing member 82 is disposed within the second receiving cavity 55 of both the second frame 52 and the fourth frame 54.

[0105] The two ends of the second receiving cavity 55 within the second frame 52 extend to opposite ends of the second frame 52 to facilitate the placement of the second reinforcing body 82. The second frame 52 is made of HC340LA material to improve its strength, and it can be cold-drawn. Taking a plane perpendicular to the extension direction of the second frame 52 as a cross-section, the cross-sectional shape of the second frame 52 is a rectangular ring, and the thickness of the first frame 51 is 1mm to 1.5mm, for example, 1.2mm.

[0106] The second reinforcing member 82 may or may not be provided in the second receiving cavity 55 of the second frame 52. When the second reinforcing member 82 is provided in the second receiving cavity 55 of the second frame 52, the extending direction of the two second reinforcing members 82 is the same as the extending direction of the second receiving cavity 55 of the second frame 52, and they are located at opposite ends of the second receiving cavity 55 of the second frame 52 along the first direction. Figure 5 As shown, a second reinforcing body 82 is provided at the upper and lower ends of the second receiving cavity 55 of the second frame 52. The second reinforcing body 82 is installed into the second receiving cavity 55 of the second frame 52. The second reinforcing body 82 is limited by welding the notch at the end of the second frame 52. The assembly is simple, reliable and low cost.

[0107] The two ends of the second receiving cavity 55 within the fourth frame 54 extend to the opposite ends of the fourth frame 54. The fourth frame 54 is made of HC340LA to improve the strength of the second frame 52. The second frame 52 can be cold-drawn. Taking a plane perpendicular to the extension direction of the fourth frame 54 as a cross-section, the cross-sectional shape of the fourth frame 54 is a rectangular ring, and the thickness of the fourth frame 54 is 1mm to 1.5mm, for example, 1.2mm.

[0108] The second receiving cavity 55 of the fourth frame 54 may or may not contain a second reinforcing body 82. When a second reinforcing body 82 is provided in the second receiving cavity 55 of the fourth frame 54, two second reinforcing bodies 82 may be provided in the fourth frame 54. The extension direction of these two second reinforcing bodies 82 is the same as the extension direction of the second receiving cavity 55 of the fourth frame 54, and they are located at opposite ends of the second receiving cavity 55 of the fourth frame 54 along the first direction. One second reinforcing body 82 is provided at the upper end and one at the lower end of the second receiving cavity 55 of the fourth frame 54. The second reinforcing body 82 is installed into the second receiving cavity 55 of the fourth frame 54 by welding the notch at the end of the fourth frame 54 to limit the position of the second reinforcing body 82. This method is simple to assemble, highly reliable, and low in cost.

[0109] See other possible examples. Figure 6The partition 70 has a third receiving cavity 71, with both ends of the third receiving cavity 71 extending to opposite ends of the partition 70. The partition 70 is made of HC340LA material to improve its strength, and it can be cold-drawn. Taking a plane perpendicular to the extending direction of the partition 70 frame as a cross-section, the cross-sectional shape of the partition 70 frame is a rectangular ring, and the thickness of the partition 70 frame is 1mm to 1.5mm, for example, 1.2mm.

[0110] The third receiving cavity 71 of the partition 70 is further provided with a third reinforcing body 83. For example, two third reinforcing bodies 83 are provided in the third receiving cavity 71 of the partition 70. The extending direction of these two third reinforcing bodies 83 is the same as the extending direction of the third receiving cavity 71 of the partition 70, and they are located at opposite ends of the third receiving cavity 71 of the partition 70 along the first direction. Figure 6 As shown, a third reinforcing body 83 is provided at the upper and lower ends of the third receiving cavity 71 of the partition 70. The third reinforcing body 83 is installed into the third receiving cavity 71 of the partition 70. The third reinforcing body 83 is limited by welding the notch at the end of the partition 70. The assembly is simple, reliable and low cost.

[0111] In some possible examples, a third reinforcing member 83 is provided within the third receiving cavity 71 of the partition 70, and the second frame 52 and the fourth frame 54 are located on opposite sides of the partition 70. The second reinforcing member 82 is not provided on the one closer to the partition 70 than on the one farther from the partition 70. For example... Figure 3 As shown, a second reinforcing body 82 is provided inside the second frame 52, while no second reinforcing body 82 is provided inside the fourth frame 54. In this way, the partition 70, the crossbeam 60, and the second frame 52 have good resistance to deformation, and the battery cell placed between the three can also provide strong restraint force for the battery cell.

[0112] Continue reading Figure 5 and Figure 6 The second reinforcing body 82 has a rectangular ring cross-section, meaning it is a rectangular tube. The thickness of the second reinforcing body 82 is 1.2mm to 1.8mm, for example, 1.5mm. The material of the second reinforcing body 82 is DP980. The third reinforcing body 83 also has a rectangular ring cross-section, meaning it is a rectangular tube. The thickness of the third reinforcing body 83 is 1.2mm to 1.8mm, for example, 1.5mm. The material of the third reinforcing body 83 is DP980.

[0113] In some possible implementations, such as Figure 3 , Figure 5 and Figure 6As shown, the second frame 52 and the fourth frame 54 are located on both sides of the partition 70, and a crossbeam 60 is provided between the partition 70 and the second frame 52. The second frame 52 and the partition 70 have the same structure and material. The second reinforcing body 82 in the second frame 52 and the third reinforcing body 83 in the partition 70 have the same structure and material. The fourth frame 54 does not have a second reinforcing body 82.

[0114] For example, the second frame 52 and the second reinforcement 82 are constructed by stacking two 1.5mm thick DP980 rectangular tubes on top of a 1.2mm thick HC340LA rectangular tube. The partition 70 and the third reinforcement 83 are constructed by stacking two 1.5mm thick DP980 rectangular tubes on top of a 1.2mm thick HC340LA rectangular tube.

[0115] In some possible implementations, such as Figure 2 As shown, the housing 30 also includes an outer frame 100, which surrounds the side frame 50. For example, the outer frame 100 surrounds the entire circumference of the side frame 50, meaning the outer frame 100 is fitted onto the side frame 50. Taking a plane perpendicular to the extending direction of the outer frame 100 as a cross-section, the cross-sectional shape of the outer frame 100 can be U-shaped, with its opening facing the side frame 50. In this way, a space is formed between the outer frame 100 and the side frame 50 to accommodate components such as plugs and wiring harnesses.

[0116] The battery box provided in this embodiment includes a box body 30, a top cover 10, a crossbeam 60, and a first reinforcing member 84. The box body 30 has an accommodating space and an opening communicating with the accommodating space; the top cover 10 is fastened to the opening; the crossbeam 60 is used to install lifting lugs, the crossbeam 60 is located within the accommodating space and is connected to the side wall of the accommodating space, the crossbeam 60 is provided with a first accommodating cavity 61, at least one end of the first accommodating cavity 61 extends to the end face of the crossbeam 60; the first reinforcing member 84 is disposed within the first accommodating cavity 61. By providing the first reinforcing member 84 within the crossbeam 60, the compression resistance of the crossbeam 60 can be improved, the compression deformation of the crossbeam 60 can be reduced, and the internal space of the crossbeam 60 can be fully utilized, thereby improving space utilization.

[0117] The embodiments or implementation methods described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. In this specification, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with an embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0118] Finally, it should be noted that other embodiments of this utility model will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A battery box, characterized in that, include: The box has a receiving space and an opening communicating with the receiving space; The top cover is fastened onto the opening; A crossbeam is used to install lifting lugs. The crossbeam is located within the receiving space and is connected to the side wall of the receiving space. The crossbeam is provided with a first receiving cavity, at least one end of which extends to the end face of the crossbeam. The first reinforcing member is disposed within the first receiving cavity.

2. The battery box according to claim 1, characterized in that, At least one of the first reinforcing members is disposed inside the first receiving cavity, and the extending direction of the first reinforcing member is the same as the extending direction of the first receiving cavity; And / or, the crossbeam is roll-formed; And / or, with a plane perpendicular to the extension direction of the crossbeam as the cross section, the cross section shape of the crossbeam is a H-shaped ring, and the thickness of the crossbeam is 1.2mm~1.8mm; And / or, the beam is made of DP980; And / or, with a plane perpendicular to the extension direction of the first reinforcing member as the cross-section, the cross-sectional shape of the first reinforcing member is a rectangular ring, and the thickness of the first reinforcing member is 2.5mm~3.5mm; And / or, the material of the first reinforcing member is B1500HS.

3. The battery box according to claim 1 or 2, characterized in that, The enclosure includes: The base plate is disposed opposite to the top cover along a first direction; A side frame is disposed between the top cover and the bottom plate, and at least a portion of the side frame is provided with a second receiving cavity; The battery box also includes: The second reinforcing member is disposed within the second receiving cavity.

4. The battery box according to claim 3, characterized in that, The side frame includes a first frame, a second frame, a third frame, and a fourth frame connected end to end in sequence. The first frame and the third frame both extend along the length of the battery box and are each provided with the second receiving cavity. The second reinforcing member includes: The first reinforcing body is disposed within the second receiving cavity of the first frame and the third frame.

5. The battery box according to claim 4, characterized in that, Both the first frame and the third frame are provided with a first reinforcing body. The extension direction of the first reinforcing body is the same as the extension direction of the corresponding second receiving cavity, and it is located in the middle region of the corresponding second receiving cavity. And / or, taking a plane perpendicular to the extension direction of the first frame as a cross-section, the cross-sectional shape of the first frame is a rectangular ring, and the thickness of the first frame is 0.8mm~1.2mm; And / or, taking a plane perpendicular to the extension direction of the third frame as a cross-section, the cross-sectional shape of the third frame is a rectangular ring, and the thickness of the third frame is 0.8mm~1.2mm; And / or, the material of both the first frame and the third frame is DP780; And / or, taking a plane perpendicular to the extension direction of the first reinforcing body as the cross-section, the cross-sectional shape of the first reinforcing body is a rectangular ring, and the thickness of the first reinforcing body is 1.2mm~1.8mm; And / or, the material of the first reinforcement is HC340LA.

6. The battery box according to claim 4, characterized in that, Both the second frame and the fourth frame extend along the width direction of the battery box and are provided with the second receiving cavity; The second reinforcing member also includes: The second reinforcing body is disposed within the second receiving cavity of the second frame and / or the fourth frame.

7. The battery box according to claim 6, characterized in that, The second frame and / or the fourth frame are respectively provided with two second reinforcing bodies. The two second reinforcing bodies extend in the same direction as the extension direction of the corresponding second receiving cavity, and are located at opposite ends of the corresponding second receiving cavity along the first direction. And / or, with a plane perpendicular to the extension direction of the second frame as the cross-section, the cross-sectional shape of the second frame is a rectangular ring, and the thickness of the second frame is 1mm~1.5mm; And / or, with a plane perpendicular to the extension direction of the fourth frame as the cross-section, the cross-sectional shape of the fourth frame is a rectangular ring, and the thickness of the fourth frame is 1mm~1.5mm; And / or, the material of the second frame and the fourth frame is HC340LA; And / or, with a plane perpendicular to the extension direction of the second reinforcement as the cross-section, the cross-sectional shape of the second reinforcement is a rectangular ring, and the thickness of the second reinforcement is 1.2mm~1.8mm; And / or, the material of the second reinforcement is DP980.

8. The battery box according to claim 3, characterized in that, The base plate includes: a cooling plate, a support member, a protective plate, and a coating layered in sequence, wherein the cooling plate is adjacent to the side frame; The protective plate is provided with a reinforcing rib on the side facing the support member, and the gap between the reinforcing rib and the flow channel of the cooling plate is opposite. And / or, the top cover includes: Galvanized sheet; An electrophoretic layer covers the surface of the galvanized sheet; A powder coating layer covers the surface of the electrophoretic layer.

9. A battery pack, characterized in that, include: The battery box according to any one of claims 1-8, and the battery cell disposed within the battery box.

10. An electrical appliance, characterized in that, Includes the battery pack as described in claim 9.

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