Support, battery box body, battery box and battery system

Abstract

The utility model provides a bracket, a battery box body, a battery box and a battery system, and relates to the technical field of batteries. The bracket comprises at least one longitudinal beam and a plurality of cross beams; when a plurality of longitudinal beams are arranged, the plurality of longitudinal beams are arranged at intervals along the width direction of the longitudinal beams; the multiple cross beams are sequentially arranged along the axis of the longitudinal beam and connected with the longitudinal beam. Wherein the width d1 of the cross beam is larger than or equal to 80mm and smaller than or equal to 120mm; the width d2 of the longitudinal beam is more than or equal to 100mm and less than or equal to 180mm; the minimum distance d3 between every two adjacent cross beams meets the condition that d3 is larger than or equal to 310 mm and smaller than or equal to 340 mm. According to the battery box, the support which is composed of the longitudinal beams and the cross beams and applied to the battery box is arranged, so that the bearing capacity of the bottom of the battery box can be improved, and the structural strength of the battery box can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a bracket, a battery case, a battery box and a battery system. Background Art

[0002] In the battery energy storage system, the stacked battery system is a more commonly used battery arrangement because the stacked battery system occupies a small area and can make full use of the vertical space. The stacked battery system includes a plurality of battery cells stacked in sequence vertically. The battery cell includes a battery box and a battery module arranged in the battery box. Among them, the battery cell can be a battery plug box or a battery pack.

[0003] As the number of stacked battery cells increases, the weight of the battery box increases, especially the battery box closer to the bottom bears more weight. In a stacked battery system that uses a liquid cooling base plate to support the battery module, the liquid cooling base plate has a flow channel inside, making it a hollow structure, resulting in a low strength of the liquid cooling plate, which in turn leads to a low structural strength of the battery box, which is insufficient to meet the load-bearing strength required for battery cell stacking. Utility Model Content

[0004] The embodiments of the present application provide a bracket, a battery box, a battery box and a battery system, which can improve the problem of low structural strength of the battery box.

[0005] In the first aspect, an embodiment of the present application provides a bracket, which is used to support components in a battery box; the bracket includes at least one longitudinal beam and multiple cross beams; when there are multiple longitudinal beams, the multiple longitudinal beams are arranged at intervals along the width direction of the longitudinal beam; the multiple cross beams are arranged in sequence along the axis of the longitudinal beam, and the multiple cross beams are connected to the longitudinal beams; wherein the width of the cross beam is d1, satisfying: 80mm≤d1≤120mm; the width of the longitudinal beam is d2, satisfying: 100mm≤d2≤180mm; the minimum spacing between two adjacent cross beams is d3, satisfying: 310mm≤d3≤340mm.

[0006] In one embodiment, an elastic pad is provided on a side of the cross beam facing away from the inner cavity of the battery box.

[0007] In one embodiment, one side of the elastic pad is inserted into the crossbeam, and the other side protrudes out of the crossbeam.

[0008] In one embodiment, the height dimension of the elastic pad protruding from the cross beam is h, which satisfies: 5mm≤h≤10mm.

[0009] In one embodiment, the cross beam is a U-shaped beam, and / or the longitudinal beam is a U-shaped beam.

[0010] In one embodiment, a mounting groove is provided on one side of the cross beam close to the longitudinal beam, and the portion where the longitudinal beam and the cross beam are connected is located in the mounting groove.

[0011] In one embodiment, the longitudinal beam has a first surface facing away from the inner cavity of the battery box, the transverse beam has a second surface facing away from the inner cavity of the battery box, and the first surface is coplanar with the second surface.

[0012] In a second aspect, an embodiment of the present application provides a battery box, which includes a frame structure and the aforementioned bracket; the bracket is arranged at one end of the frame structure, and the end of the beam is connected to the frame structure.

[0013] In one embodiment, a slot is provided on the frame structure, and the end of the crossbeam is inserted into the slot.

[0014] In one embodiment, the frame structure includes two end plates and two side plates, the two side plates are parallel to the axis of the longitudinal beam, the two end plates are respectively located at two ends of the longitudinal beam, and the two ends of the two side plates are respectively connected to the ends of the two end plates.

[0015] In one embodiment, weight-reducing grooves are provided on the opposite back surfaces of the side panels, and a plurality of reinforcing structures are provided in the weight-reducing grooves. The plurality of reinforcing structures are arranged in sequence along the axis of the longitudinal beam, and the reinforcing structures include two intersecting first reinforcing ribs, and the two ends of the first reinforcing ribs are respectively connected to a pair of opposite groove walls of the weight-reducing groove, and the side walls of the first reinforcing ribs are connected to the groove bottom of the weight-reducing groove.

[0016] In one embodiment, one of the two end plates is a rear end plate, and a first bending portion is provided at one end of the rear end plate close to the bracket. The first bending portion is located on a side of the rear end plate close to the inner cavity of the battery box. A second reinforcing rib is provided on the first bending portion, and both sides of the second reinforcing rib are respectively connected to the first bending portion and the plate surface of the rear end plate.

[0017] In one embodiment, one of the two end plates is a rear end plate, and a second bending portion is provided at an end of the rear end plate away from the bracket. The second bending portion is located on the side of the rear end plate away from the inner cavity of the battery box. A third reinforcing rib is provided on the second bending portion, and both sides of the third reinforcing rib are respectively connected to the second bending portion and the plate surface of the rear end plate.

[0018] In one embodiment, the battery box further comprises a waterproof seal, which is arranged at one end of the surrounding frame structure away from the bracket.

[0019] In one embodiment, the waterproof seal comprises a waterproof ring and a sealing ring. The waterproof ring is partially embedded in the end of the surrounding frame structure, and the sealing ring is attached to the end of the surrounding frame structure.

[0020] In one embodiment, the battery box also includes an intermediate reinforcement member, which is arranged on the inner side of the frame structure and located in the middle of the longitudinal beam. Both sides of the intermediate reinforcement member are respectively connected to the inner wall of the frame structure parallel to the axis of the longitudinal beam.

[0021] In one embodiment, an outer surface of the intermediate reinforcement is provided with an insulating sheet.

[0022] In one embodiment, the enclosure structure is provided with two explosion-proof valve installation holes, and the two explosion-proof valve installation holes are distributed along the diagonal line of the enclosure structure.

[0023] In one embodiment, a hanging structure is provided on the outer wall of the frame structure.

[0024] In a third aspect, an embodiment of the present application provides a battery box, which includes a box cover and the aforementioned battery box body; there are multiple battery boxes, and the multiple battery boxes are stacked in sequence; the box cover and the battery box located at the top cover each other.

[0025] In one embodiment, a positioning pin is provided on the side of the frame structure facing away from the bracket, and a positioning hole is provided on the side of the frame structure close to the bracket. In two adjacent battery boxes, the positioning pin of one battery box is inserted into the positioning hole of the other battery box.

[0026] In one embodiment, the frame structure is provided with two positioning pins and two positioning holes, the two positioning pins are distributed along the diagonal line of the frame structure, and the two positioning holes correspond to the two positioning pins one by one.

[0027] In a fourth aspect, an embodiment of the present application provides a battery system, which includes a battery module, a thermal management plate and the aforementioned battery box; there are multiple battery modules, and the multiple battery modules are respectively arranged in multiple battery boxes; there are multiple thermal management plates, and the multiple thermal management plates are respectively arranged in multiple battery boxes, and the thermal management plate is located between the battery module and the bracket.

[0028] Beneficial effects of the embodiments of the present application:

[0029] In an embodiment of the present application, by providing a bracket for a battery box composed of a longitudinal beam and a plurality of transverse beams, the bearing capacity of the bottom of the battery box can be increased, thereby improving the structural strength of the battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1is a schematic diagram of the structure of a bracket provided in an embodiment of the present application;

[0032] Figure 2 is a schematic structural diagram of a bracket provided in an embodiment of the present application from another perspective;

[0033] Figure 3 is a plan view of a bracket provided in an embodiment of the present application;

[0034] Figure 4 yes Figure 3 Sectional view of AA in the middle;

[0035] Figure 5 is a schematic structural diagram of a crossbeam provided in an embodiment of the present application;

[0036] Figure 6 yes Figure 2 The enlarged view of point B in the middle;

[0037] Figure 7 It is a structural schematic diagram of a battery box provided in an embodiment of the present application;

[0038] Figure 8 is a schematic structural diagram of a battery box provided in an embodiment of the present application from another perspective;

[0039] Fig. 9 yes Figure 8 Enlarged view of point C in the middle;

[0040] Fig.10 yes Figure 7 The enlarged view of point D in the middle;

[0041] Fig.11 is a schematic structural diagram of a rear end plate provided in an embodiment of the present application;

[0042] Fig.12 is a side view of a rear end plate provided in an embodiment of the present application;

[0043] Fig.13 yes Figure 7 Enlarged view of point E in the middle;

[0044] Fig.14 is a schematic diagram of the structure of a battery box provided in an embodiment of the present application;

[0045] Fig.15 It is a schematic diagram of the structure of the battery system provided in the embodiment of the present application.

[0046] Description of reference numerals:

[0047] 001-battery box;

[0048] 011-Stand;

[0049] 111- beam; 1111- tank body; 1112- mounting groove; 1113- second surface;

[0050] 112-longitudinal beam; 1121-first surface;

[0051] 113- elastic pad;

[0052] 012-frame structure; 121-slot; 122-explosion-proof valve installation hole; 123-positioning pin; 124-positioning hole;

[0053] 013-side plate; 131-weight reduction groove; 132-first reinforcement rib; 133-hoisting structure;

[0054] 014-rear end plate; 141-first bending portion; 142-second reinforcing rib; 143-second bending portion; 144-third reinforcing rib;

[0055] 015-front end plate;

[0056] 161- waterproof ring; 162- sealing ring;

[0057] 017-intermediate reinforcement;

[0058] 018-module fixing beam;

[0059] 002-battery box; 021-box cover;

[0060] 003-battery system; 031-thermal management board; 032-insulating parts. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0062] In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0063] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0064] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0065] Please participate Figure 1 , Figure 1 : is a schematic diagram of the structure of the bracket 011 provided in the embodiment of the present application. The embodiment of the present application provides a bracket 011, which is applied to a battery box, and the bracket 011 is used to carry the components in the battery box. Specifically, the bracket 011 is used to form the bottom wall of the battery box to support the components located in the battery box, such as a liquid cooling plate and a battery module. The bracket 011 includes at least one longitudinal beam 112 and multiple cross beams 111. When there are multiple longitudinal beams 112, the multiple longitudinal beams 112 are arranged at intervals along the width direction of the longitudinal beam 112; and the multiple cross beams 111 are arranged in sequence along the axis of the longitudinal beam 112. Multiple cross beams 111 are connected to the longitudinal beam 112; wherein the width of the cross beam 111 is d1, which satisfies: 80mm≤d1≤120mm; the width of the longitudinal beam 112 is d2, which satisfies: 100mm≤d2≤180mm; the minimum spacing between two adjacent cross beams 111 is d3, which satisfies: 310mm≤d3≤340mm.

[0066] It can be understood that the cross beam 111 and the longitudinal beam 112 are beam bodies with length, width and height. A cross section is made perpendicular to the length direction, and in the cross section, the longer dimension is the width and the shorter dimension is the height. In this embodiment, the surface of the cross beam 111 and the longitudinal beam 112 for supporting the components is formed by the long side and the wide side thereof.

[0067] The axis of the cross beam 111 is perpendicular to the axis of the longitudinal beam 112 , and two ends of the cross beam 111 are symmetrically arranged along the axis of the longitudinal beam 112 .

[0068] Optionally, the plurality of cross beams 111 are evenly spaced along the axis of the longitudinal beam 112. When there is only one longitudinal beam 112, the two ends of the cross beam 111 are symmetrically arranged along the length direction of the longitudinal beam 112; when there are multiple longitudinal beams 112, the multiple longitudinal beams 112 and the multiple cross beams 111 are crisscrossed, and the cross beams 111 are connected to the opposite parts of the longitudinal beam 112.

[0069] In addition, the longitudinal beam 112 and the transverse beam 111 are both sheet metal parts.

[0070] In this embodiment, by providing a bracket 011 for the battery box composed of a longitudinal beam 112 and a plurality of transverse beams 111, the bearing capacity of the bottom of the battery box can be increased, thereby improving the structural strength of the battery box.

[0071] In addition, the bracket 011 with the above structure can make the load on the bracket 011 more uniform and dispersed, thereby reducing the concentration of local stress on the bracket 011, thereby improving the stability and reliability of the structure of the bracket 011. Therefore, the stability and reliability of the battery box using the bracket 011 can be improved.

[0072] Among them, the width d1 of the beam 111 can be but is not limited to: 80mm, 82mm, 83mm, 84mm, 86mm, 88mm, 90mm, 91mm, 92mm, 97mm, 99mm, 100mm, 101mm, 103mm, 105mm, 108mm, 110.5mm, 113mm, 114mm, 117mm, 118.6mm, 120mm. By limiting the minimum value of the width of the beam 111, it is ensured that the beam 111 has sufficient yield strength and tensile strength, and that the beam 111 has an appropriate cross-sectional area to ensure the cross-sectional moment of inertia of the beam, thereby improving the reliability of the beam's support for components, and further improving the beam's support for the liquid cooling plate to avoid deformation of the liquid cooling plate; by limiting the maximum value of the width of the beam 111, not only the overall weight and material cost of the bracket can be controlled, making the bracket have good economy, but also its adverse effects on the battery box located therebelow can be reduced.

[0073] The width d2 of the longitudinal beam 112 can be, but is not limited to, 100 mm, 102 mm, 103 mm, 114 mm, 115 mm, 128 mm, 130 mm, 131 mm, 132 mm, 137 mm, 139 mm, 140 mm, 141 mm, 143 mm, 148.35 mm, 150 mm, 155.5 mm, 158.3 mm, 159.4 mm, 160 mm, 168.6 mm, or 180 mm. By limiting the minimum value of the width of the longitudinal beam 112, it can be ensured that there is a sufficient splicing surface between the cross beam 111 and the longitudinal beam, so that the longitudinal beam 112 can directly support the welding portion between it and the cross beam 111, thereby improving the welding strength between the cross beam 111 and the longitudinal beam 112; by limiting the maximum value of the width of the longitudinal beam 112, not only the overall weight and material cost of the bracket can be controlled, making the bracket have good economy, but also its adverse effects on the battery box located below it can be reduced.

[0074] The minimum spacing d3 between two adjacent beams 111 may be, but is not limited to, 310mm, 312mm, 313mm, 314mm, 316.5mm, 317.5mm, 318mm, 319mm, 202mm, 320mm, 322mm, 324mm, 329mm, 330mm, 331.5mm, 333.7mm, 335.5mm, 336mm, 338.4mm, 339mm, 339.8mm, 340mm. By the above definition, it is possible to avoid the beams 111 being too sparsely arranged and thus causing insufficient strength, thereby ensuring the support strength of the bracket, providing better support for the liquid cooling plate, thereby preventing deformation of the liquid cooling plate, and avoiding unnecessary weight increase and cost increase due to the beams 111 being too densely arranged.

[0075] See also Figure 2 , Figure 2 FIG. 1 is a schematic structural diagram of the bracket 011 provided in another embodiment of the present application. In one embodiment, an elastic pad 113 is provided on a side of the crossbeam 111 facing away from the inner cavity of the battery box.

[0076] For example, the elastic pad 113 may be, but is not limited to, a rubber pad, PU foam, or anti-static foam, wherein the anti-static foam may be EVA foam.

[0077] In addition, the elastic pad 113 may be bonded to the cross beam 111 or may be clamped to the cross beam 111 .

[0078] In this embodiment, by providing the elastic pad 113, a buffering effect can be played when the battery box contacts other components during placement or stacking of the battery box, thereby preventing the battery box from being damaged due to rigid contact between the battery box and other components.

[0079] In addition, when the battery boxes are stacked, the elastic pads 113 are in a compressed state, thereby providing a pre-tightening force and a friction force for the stacked battery boxes, thereby preventing the stacked battery boxes from shaking, thereby improving the integrity of the stacked battery boxes.

[0080] In one embodiment, the connection between the elastic pad 113 and the cross beam 111 can be as follows: one side of the elastic pad 113 is inserted into the cross beam 111, and the other side protrudes out of the cross beam 111. Specifically, a groove 1111 is provided on the cross beam 111, and one side of the elastic pad 113 is inserted into the groove 1111. The elastic pad 113 and the groove 1111 are interference fit.

[0081] In this embodiment, through the above arrangement, the matching surface between the elastic pad 113 and the cross beam 111 can be increased, thereby increasing the connection reliability between the elastic pad 113 and the cross beam 111, thereby improving the structural reliability of the battery box.

[0082] Figure 3 is a plan view of the bracket 011 provided in the embodiment of the present application, Figure 4 yes Figure 3 In one embodiment, the height dimension of the elastic pad 113 protruding from the crossbeam 111 is h, which satisfies: 5mm≤h≤10mm.

[0083] It will be appreciated that h may be, but is not limited to, 5mm, 5.4mm, 6mm, 6.1mm, 6.9mm, 7mm, 7.2mm, 7.6mm, 8mm, 8.3mm, 8.8mm, 9mm, 9.5mm, or 10mm.

[0084] In this embodiment, by limiting the height dimension of the elastic pad 113 protruding from the cross beam 111, on the one hand, it can avoid that the height dimension is too small, resulting in poor buffering effect; on the other hand, it can avoid that the height dimension is too large, resulting in a large height dimension of the battery box, which is not conducive to its installation.

[0085] In one embodiment, the cross beam 111 is a U-shaped beam, and the longitudinal beam 112 is also a U-shaped beam. Specifically, the cross beam 111 and the longitudinal beam 112 are respectively formed by bending sheet metal.

[0086] Optionally, the grooves of the cross beam 111 and the longitudinal beam 112 face away from the inner cavity of the battery box, and their flat sides face the inner cavity of the battery box, thereby increasing the contact surface between the bracket 011 and the components inside the battery box, such as the liquid cooling plate, and further improving the stress state of the components inside the battery box.

[0087] In this embodiment, by setting the cross beam 111 and the longitudinal beam 112 as U-shaped beams, the cross beam 111 and the longitudinal beam 112 can have sufficient strength to support the components inside the battery box, and the material usage of the cross beam 111 and the longitudinal beam 112 is reduced, which is beneficial to controlling the material cost of the bracket 011.

[0088] See also Figure 5 and Figure 6 , Figure 5 is a schematic diagram of the structure of the crossbeam 111 provided in an embodiment of the present application, Figure 6 yes Figure 2 In one embodiment, a mounting groove 1112 is provided on one side of the cross beam 111 close to the longitudinal beam 112. The portion where the longitudinal beam 112 is connected to the cross beam 111 is located in the mounting groove 1112.

[0089] In this embodiment, through the above-mentioned settings, the matching surface between the cross beam 111 and the longitudinal beam 112 can be increased, thereby increasing the positioning accuracy between the longitudinal beam 112 and the cross beam 111, and improving the reliability of the connection between the cross beam 111 and the longitudinal beam 112, thereby improving the structural reliability of the battery box.

[0090] See also Figure 6 In one embodiment, the longitudinal beam 112 has a first surface 1121 facing away from the inner cavity of the battery box, and the transverse beam 111 has a second surface 1113 facing away from the inner cavity of the battery box, and the first surface 1121 and the second surface 1113 are coplanar.

[0091] In this embodiment, through the above arrangement, the surface of the bracket 011 away from the inner cavity of the battery box is a planar structure, so that when the bracket 011 contacts the components outside the battery box, the force is more uniform and dispersed, thereby reducing the concentration of local stress on the bracket 011. In this way, the stability and reliability of the bracket 011 structure can be improved.

[0092] See 7 and Figure 8 , Figure 7 is a schematic diagram of the structure of the battery box 001 provided in an embodiment of the present application, Figure 8 001 is a schematic diagram of a battery box 001 according to an embodiment of the present application. The embodiment of the present application provides a battery box 001, which includes a frame structure 012 and the aforementioned bracket 011. The bracket 011 is disposed at one end of the frame structure 012. The end of the crossbeam 111 is connected to the frame structure 012.

[0093] Among them, the frame structure 012 includes two end plates and two side plates 013. The two side plates 013 are parallel to the axis of the longitudinal beam 112. The two end plates are respectively located at the two ends of the longitudinal beam 112. The two ends of the two side plates 013 are respectively connected to the ends of the two end plates. The two side plates 013 have the same structure, so that the two side plates 013 are interchangeable, thereby reducing the difficulty of assembling the battery box 001. In addition, the two end plates are respectively a front end plate 015 and a rear end plate 014. A connector mounting port is provided on the front end plate 015 to lead out the electrical signals of the electronic devices inside the battery box 001. And a module fixing beam 018 is provided on the side of the front end plate 015 facing the inner cavity of the battery box 001, and the module fixing beam 018 is arranged adjacent to the bracket 011. The two ends of the module fixing beam 018 are respectively connected to the two side plates 013. The module fixing beam 018 can not only be used to fix the module, but also can improve the structural strength of the battery box 001.

[0094] Specifically, the end of the crossbeam 111 is welded to the frame structure 012, the side plate 013 is welded to the end plate, and the liquid cooling plate is spot-welded to the crossbeam 111. In order to avoid poor welding such as pores, welding slag, and convex spots at the welding points, except for the electric welding points, the specific method of the remaining welding is carbon dioxide welding to ensure the overall quality of the welding, thereby improving the corrosion resistance of the welding parts.

[0095] In addition, a hoisting structure 133, specifically a hoisting hole, is provided on the outer wall of the frame structure 012. Three hoisting holes are provided on the side plate 013. The hoisting structure 133 is used for hoisting the battery box 001 as a whole when it is stacked.

[0096] In this embodiment, by adopting the aforementioned bracket 011, on the one hand, the load-bearing capacity of the bottom of the battery box 001 can be increased, thereby improving the structural strength of the battery box; on the other hand, the load between the frame structure 012 and the bracket 011 can be made more uniform and dispersed, thereby reducing the concentration of local stress in the battery box 001, thereby improving the structural stability and reliability of the battery box 001.

[0097] See also Fig. 9 , Fig. 9 yes Figure 8 The enlarged view of the C in the middle. In one embodiment, a slot 121 is provided on the frame structure 012. The end of the crossbeam 111 is inserted into the slot 121.

[0098] In this embodiment, through the above arrangement, the matching surface between the cross beam 111 and the frame structure 012 can be increased, thereby increasing the connection reliability between the cross beam 111 and the frame structure 012, thereby improving the structural reliability of the battery box 001.

[0099] See also Figure 7 and Fig.10, Fig.10 yes Figure 7 Enlarged view of point D in the figure. In one embodiment, weight-reducing grooves 131 are provided on opposite sides of the side panels 013. A plurality of reinforcing structures are provided in the weight-reducing grooves 131. The plurality of reinforcing structures are arranged in sequence along the axis of the longitudinal beam 112. The reinforcing structure includes two first reinforcing ribs 132 arranged to intersect. The two ends of the first reinforcing rib 132 are respectively connected to a pair of opposite groove walls of the weight-reducing groove 131, and the side walls of the first reinforcing rib 132 are connected to the groove bottom of the weight-reducing groove 131.

[0100] In this embodiment, through the above arrangement, the structural strength of the side plate 013 can be ensured, and the material usage of the side plate 013 can be reduced, which is conducive to lightweighting of the battery system.

[0101] In addition, the two first reinforcing ribs 132 are arranged to intersect each other, which can not only disperse the static load of the battery box 001 to avoid the problem of stress concentration caused by local force, but also make the partial loads of the two intersecting reinforcements offset each other, thereby further improving the structural strength of the side panel 013, and then the structural strength of the battery box 001.

[0102] See also Fig.11 , Fig.11 1 is a schematic diagram of the structure of the rear end plate 014 provided in an embodiment of the present application. In one embodiment, one of the two end plates is the rear end plate 014, and a first bending portion 141 is provided at one end of the rear end plate 014 close to the bracket 011, and the first bending portion 141 is located on one side of the rear end plate 014 close to the inner cavity of the battery box 001, and a second reinforcing rib 142 is provided on the first bending portion 141, and both sides of the second reinforcing rib 142 are respectively connected to the first bending portion 141 and the plate surface of the rear end plate 014.

[0103] In this embodiment, by providing the second reinforcing rib 142 and the first bending portion 141, not only the structural strength of the rear end plate 014 can be improved, but also the rear end plate 014 can be protected from gravity load and will not tip over backwards, thereby improving the structural strength of the battery box 001.

[0104] See also Fig.12 , Fig.12 014. It is a side view of the rear end plate 014 provided in an embodiment of the present application. In one embodiment, one of the two end plates is the rear end plate 014, and a second bending portion 143 is provided at one end of the rear end plate 014 away from the bracket 011, and the second bending portion 143 is located on the side of the rear end plate 014 away from the inner cavity of the battery box 001, and a third reinforcing rib 144 is provided on the second bending portion 143, and the two sides of the third reinforcing rib 144 are respectively connected to the second bending portion 143 and the plate surface of the rear end plate 014.

[0105] In this embodiment, by providing the third reinforcing rib 144 and the second bending portion 143, not only can the contact surface between two adjacent battery boxes 001 be increased by the second bending portion 143, thereby improving the reliability of the stacked battery boxes 001, but also the structural strength of the rear end plate 014 can be improved to avoid deformation of the upper bending portion due to gravity load.

[0106] See also Fig.13 , Fig.13 yes Figure 7 The enlarged view of point E in the middle. In one embodiment, the battery box 001 further includes a waterproof seal, which is disposed at one end of the surrounding frame structure 012 away from the bracket 011 .

[0107] It is understood that when two adjacent battery boxes 001 are stacked, there is a gap between them, so that external dust, liquid, etc. can easily enter the battery box 001 through the gap.

[0108] Based on this, in this embodiment, through the above-mentioned arrangement, after the battery boxes 001 are stacked, the gap between two adjacent battery boxes 001 can be sealed by a waterproof sealant, thereby improving the air tightness of the battery boxes 001, and further improving the waterproof and dustproof properties of the battery boxes 001, so as to facilitate the normal operation of the battery system.

[0109] In one embodiment, the waterproof seal comprises a waterproof ring 161 and a sealing ring 162 , wherein the waterproof ring 161 is partially embedded in the end of the frame structure 012 , and the sealing ring 162 is attached to the end of the frame structure 012 . The waterproof ring 161 is located inside the sealing ring 162 .

[0110] Optionally, the waterproof ring 161 is a silicone waterproof ring 161 ; and the sealing ring 162 is a foam sealing ring 162 .

[0111] In addition, the height of the waterproof ring 161 protruding from the end of the frame structure 012 is in the range of 4-10 mm, and the thickness of the sealing ring 162 is in the range of 4-10 mm.

[0112] In this embodiment, by partially embedding the waterproof ring 161 at the end of the frame structure 012, the contact area between the waterproof ring 161 and the frame structure 012 can be increased, thereby improving the position reliability of the waterproof ring 161; and after the battery boxes 001 are stacked, the waterproof ring 161 can be pressed against the upper and lower battery boxes 001, thereby improving the airtightness of the battery boxes 001.

[0113] See also Figure 7In one embodiment, the battery box 001 further includes an intermediate reinforcement 017. The intermediate reinforcement 017 is disposed on the inner side of the frame structure 012 and located in the middle of the longitudinal beam 112. Both sides of the intermediate reinforcement 017 are respectively connected to the inner wall of the frame structure 012 parallel to the axis of the longitudinal beam 112.

[0114] In this embodiment, the structural strength of the battery box 001 can be further improved by providing the intermediate reinforcement 017, thereby improving its reliability.

[0115] In one embodiment, an outer surface of the intermediate reinforcement 017 is provided with an insulating sheet.

[0116] Optionally, the material of the insulating sheet is insulating PP (polypropylene).

[0117] When setting the intermediate reinforcement 017, the electrical clearance and safe creepage distance between it and electrical components such as battery modules and buses can be adaptively designed according to usage conditions, battery power, etc., so as to improve the electrical safety of the battery system.

[0118] In this embodiment, by providing an insulating sheet, the insulating property of the intermediate reinforcement 017 can be improved, thereby improving the reliability of the battery system.

[0119] See also Figure 7 In one embodiment, the frame structure 012 is provided with two explosion-proof valve installation holes 122 , and the two explosion-proof valve installation holes 122 are distributed along the diagonal line of the frame structure 012 .

[0120] In this embodiment, through the above arrangement, the two explosion-proof valves can be responsible for two areas of the inner cavity of the battery box 001, thereby improving the reliability of the battery system.

[0121] See also Fig.14 , Fig.14 002 is a schematic diagram of the structure of a battery box 002 provided in an embodiment of the present application. The embodiment of the present application provides a battery box 002, which includes a box cover 021 and the aforementioned battery box body 001. There are multiple battery boxes 001, and the multiple battery boxes 001 are stacked in sequence. The box cover 021 covers the battery box body 001 located at the top.

[0122] In this embodiment, by adopting the aforementioned battery box 001, on the one hand, the load-bearing capacity of the battery box 002 can be increased, thereby improving the structural strength of the battery box 002; on the other hand, the load inside the battery box 002 can be made more uniform and dispersed, thereby reducing the concentration of local stress in the battery box 002, thereby improving the structural stability and reliability of the battery box 002.

[0123] In addition, in this embodiment, only the uppermost battery box 001 is provided with a box cover 021, so that the box cover 021 of the lower battery box 001 is the bottom of the upper battery box 001. In this way, on the one hand, the number of components of the battery box 002 can be reduced, thereby reducing the gravity of the battery box 002, which is conducive to improving the structural reliability of the battery box 002; on the other hand, the stacking height of the battery box 002 can be reduced, thereby improving the energy density of the battery system using the battery box 002.

[0124] See also Figure 7 and Figure 8 In one embodiment, a positioning pin 123 is provided on the side of the frame structure 012 facing away from the bracket 011, and a positioning hole 124 is provided on the side of the frame structure 012 close to the bracket 011. In two adjacent battery boxes 001, the positioning pin 123 of one battery box 001 is inserted into the positioning hole 124 of the other battery box 001.

[0125] Specifically, the frame structure 012 is provided with two positioning pins 123 and two positioning holes 124. The two positioning pins 123 are distributed along the diagonal line of the frame structure 012, and the two positioning holes 124 correspond one to one with the two positioning pins 123. Combined with the arrangement of the two explosion-proof valve mounting holes 122, the two explosion-proof valves are distributed along a diagonal line of the frame structure 012, and the beam positioning pins 123 are distributed along another diagonal line of the frame structure 012.

[0126] In this embodiment, by providing the positioning pins 123 and the positioning holes 124, the conventional tray for supporting and positioning the battery boxes 001 can be eliminated. In this way, on the one hand, the stacking height of the battery boxes 002 can be reduced, thereby improving the energy density of the battery system using the battery boxes 002; on the other hand, two adjacent battery boxes 001 can be positioned based on the cooperation of the positioning pins 123 and the positioning holes 124, thereby improving the position accuracy of the two adjacent battery boxes 001.

[0127] In addition, by removing the tray, it is also possible to avoid the situation where welding slag on the tray falls off when installing the battery box and causes a battery short circuit.

[0128] See also Fig.15 , Fig.15 001 is a schematic diagram of the structure of the battery system provided by the embodiment of the present application. The embodiment of the present application provides a battery system 003, which includes a battery module, a thermal management board 031 and the aforementioned battery box 002. There are multiple battery modules, and the multiple battery modules are respectively arranged in multiple battery boxes 001. There are multiple thermal management boards 031, and the multiple thermal management boards 031 are respectively arranged in multiple battery boxes 001, and the thermal management board 031 is located between the battery module and the bracket 011.

[0129] An insulating member 032 is provided between the heat management plate 031 and the battery module to insulate the heat management plate and the battery module. A top insulating sheet is provided above the battery module to insulate the battery module from the components above.

[0130] In this embodiment, by adopting the aforementioned battery box 002, on the one hand, the carrying capacity of the battery system 003 can be increased, thereby improving the structural strength of the battery system 003; on the other hand, the load inside the battery system 003 can be made more uniform and dispersed, thereby reducing the concentration of local stress in the battery system 003, thereby improving the structural stability and reliability of the battery system 003.

[0131] The embodiments of the present application are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A bracket, characterized in that: The bracket is used to carry components in the battery box, and the bracket includes: at least one longitudinal beam, when there are multiple longitudinal beams, the multiple longitudinal beams are arranged at intervals along the width direction of the longitudinal beam; A plurality of cross beams are sequentially arranged along the axis of the longitudinal beam, and the plurality of cross beams are connected to the longitudinal beam; in, The width of the crossbeam is d1, which satisfies: 80mm≤d1≤120mm; The width of the longitudinal beam is d2, which satisfies: 100mm≤d2≤180mm; The minimum spacing between two adjacent beams is d3, satisfying: 310mm≤d3≤340mm.

2. The bracket according to claim 1, characterized in that: An elastic pad is arranged on one side of the cross beam away from the inner cavity of the battery box.

3. The bracket according to claim 2, characterized in that: One side of the elastic pad is inserted into the cross beam, and the other side protrudes out of the cross beam.

4. The bracket according to claim 3, characterized in that: The height dimension of the elastic pad protruding from the crossbeam is h, which satisfies: 5mm≤h≤10mm.

5. The bracket according to any one of claims 1 to 4, characterized in that: The cross beam is a U-shaped beam, and / or the longitudinal beam is a U-shaped beam.

6. The bracket according to any one of claims 1 to 4, characterized in that: A mounting groove is arranged on one side of the cross beam close to the longitudinal beam, and a portion where the longitudinal beam and the cross beam are connected is located in the mounting groove.

7. The bracket according to any one of claims 1 to 4, characterized in that: The longitudinal beam has a first surface facing away from the inner cavity of the battery box, and the transverse beam has a second surface facing away from the inner cavity of the battery box, and the first surface is coplanar with the second surface.

8. A battery box, characterized in that: include: Frame structure; And, the bracket according to any one of claims 1 to 7; The bracket is arranged at one end of the frame structure, and the end of the crossbeam is connected to the frame structure.

9. The battery case according to claim 8, characterized in that: The frame structure is provided with a slot, and the end of the crossbeam is inserted into the slot.

10. The battery case according to claim 8, characterized in that: The frame structure includes two end plates and two side plates, the two side plates are parallel to the axis of the longitudinal beam, the two end plates are respectively located at two ends of the longitudinal beam, and the two ends of the two side plates are respectively connected to the ends of the two end plates.

11. The battery case according to claim 10, characterized in that: The side panels are provided with weight-reducing grooves on the opposite sides thereof, and a plurality of reinforcing structures are provided in the weight-reducing grooves. The plurality of reinforcing structures are arranged in sequence along the axis of the longitudinal beam, and the reinforcing structures include two first reinforcing ribs arranged intersectingly, and the two ends of the first reinforcing ribs are respectively connected to a pair of opposite groove walls of the weight-reducing groove, and the side walls of the first reinforcing ribs are connected to the groove bottom of the weight-reducing groove.

12. The battery case according to claim 10, characterized in that: One of the two end plates is a rear end plate, and a first bending portion is provided at one end of the rear end plate close to the bracket. The first bending portion is located on a side of the rear end plate close to the inner cavity of the battery box. A second reinforcing rib is provided on the first bending portion, and two sides of the second reinforcing rib are respectively connected to the first bending portion and the plate surface of the rear end plate.

13. The battery case according to claim 10, characterized in that: One of the two end plates is a rear end plate, and a second bending portion is provided at one end of the rear end plate away from the bracket. The second bending portion is located on the side of the rear end plate away from the inner cavity of the battery box. A third reinforcing rib is provided on the second bending portion, and both sides of the third reinforcing rib are respectively connected to the second bending portion and the plate surface of the rear end plate.

14. The battery case according to any one of claims 8 to 13, characterized in that: The battery box also includes a waterproof seal, which is arranged at one end of the surrounding frame structure away from the bracket.

15. The battery case according to claim 14, characterized in that: The waterproof seal comprises a waterproof ring and a sealing ring. The waterproof ring is partially embedded in the end of the surrounding frame structure, and the sealing ring is attached to the end of the surrounding frame structure.

16. The battery case according to any one of claims 8 to 13, characterized in that: The battery box also includes an intermediate reinforcement member, which is arranged on the inner side of the frame structure and located in the middle of the longitudinal beam. Both sides of the intermediate reinforcement member are respectively connected to the inner wall of the frame structure parallel to the axis of the longitudinal beam.

17. The battery case according to claim 16, characterized in that: An insulating sheet is provided on the outer surface of the intermediate reinforcement.

18. The battery case according to any one of claims 8 to 13, characterized in that: The enclosure structure is provided with two explosion-proof valve installation holes, and the two explosion-proof valve installation holes are distributed along the diagonal line of the enclosure structure.

19. The battery case according to any one of claims 8 to 13, characterized in that: A hoisting structure is arranged on the outer wall of the enclosure structure.

20. A battery box, characterized in that: include: The battery case according to any one of claims 8 to 19, wherein there are a plurality of battery cases, and the plurality of battery cases are stacked in sequence; The box cover covers the battery box body located at the top.

21. The battery box according to claim 20, characterized in that: A positioning pin is provided on the side of the frame structure away from the bracket, and a positioning hole is provided on the side of the frame structure close to the bracket. In two adjacent battery boxes, the positioning pin of one battery box is inserted into the positioning hole of the other battery box.

22. The battery box according to claim 21, characterized in that: The frame structure is provided with two positioning pins and two positioning holes, the two positioning pins are distributed along the diagonal line of the frame structure, and the two positioning holes correspond to the two positioning pins one by one.

23. A battery system, characterized in that: include: A battery box as claimed in any one of claims 20 to 22; A plurality of battery modules are respectively arranged in the plurality of battery boxes; A plurality of heat management plates are respectively disposed in the plurality of battery boxes, and the heat management plates are located between the battery module and the bracket.

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