Box structure and battery system

Abstract

The utility model discloses a box body structure and a battery system. The box structure comprises a bottom plate and a beam assembly, the beam assembly is arranged on the bottom plate, a mounting cavity is defined by the beam assembly and the bottom plate, and the mounting cavity is used for mounting a battery module. The beam assembly comprises a first end beam, a first edge beam, a second end beam and a second edge beam which are connected, the first end beam and the second end beam are oppositely arranged, and the first edge beam and the second edge beam are oppositely arranged. A first fixing piece and a second fixing piece are arranged on the side face, facing the second edge beam, of the first edge beam in an extending mode and are both used for fixing the battery module, and the first fixing piece is higher than the second fixing piece. The multi-layer stacked battery module is fixed through the first fixing piece and the second fixing piece which are different in height, so that the multi-layer stacked battery module can be stably fixed in the battery box body, the conditions of displacement and looseness of the multi-layer stacked battery module are avoided, the service life of the battery module can be prolonged, and potential safety hazards are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery equipment, especially to a box structure and battery system. BACKGROUND

[0002] In the field of new energy vehicles, especially in the development process of heavy trucks, with the continuous improvement of the endurance mileage and power performance requirements of new energy vehicles, the demand for the power of the vehicle-mounted battery system is also increasing. The multi-layer stacking of battery modules can improve the endurance mileage and power performance of new energy vehicles.

[0003] The internal structure of the box structure in the related art is relatively simple, and it is difficult to stably fix the multi-layer stacked battery modules, and it is difficult to ensure the stability of the multi-layer battery modules during the driving process of the heavy truck. The vibration, jolt and the like generated during driving of the vehicle can easily cause displacement, loosening and even collision of the battery modules. This not only reduces the service life of the battery modules, but also may cause safety hazards. SUMMARY

[0004] The main purpose of the utility model is to provide a box structure and battery system, which aims to solve the technical problem that the battery box in the related art is difficult to stably fix the multi-layer stacked battery modules and reduces the service life of the battery modules.

[0005] In order to achieve the above-mentioned utility model purposes, the utility model discloses a box structure in the first aspect.

[0006] A box structure, comprising a bottom plate and a beam assembly, the beam assembly is arranged on the bottom plate, and the beam assembly and the bottom plate enclose an installation cavity, the installation cavity is used for installing a battery module; the beam assembly comprises a connected first end beam, a first side beam, a second end beam and a second side beam, the first end beam and the second end beam are arranged opposite to each other, and the first side beam and the second side beam are arranged opposite to each other.

[0007] The side surface of the first side beam extending towards the second side beam is provided with a first fixing member and a second fixing member, the first fixing member and the second fixing member are both used for fixing the battery module, and the height of the first fixing member is higher than the height of the second fixing member.

[0008] In one embodiment, the box structure comprises a reinforcing member, one end of the reinforcing member is connected with the first side beam, the other end of the reinforcing member is connected with the second side beam, and the bottom of the reinforcing member is connected with the bottom plate.

[0009] In one embodiment, along the height direction of the first side beam, the first fixing member is arranged at the middle part of the first side beam; and / or

[0010] The second fixing member is arranged at the bottom of the first edge beam along the height direction of the first edge beam.

[0011] In one of the embodiments, the first fixing member has an extension width smaller than that of the second fixing member.

[0012] In one of the embodiments, the first fixing member has a first mounting surface for mounting the battery module, and the first mounting surface is arranged obliquely downward.

[0013] In one of the embodiments, the second fixing member has a first fixing portion for fixing the battery module, and the second fixing member has a first stepped structure at the end away from the first edge beam, and the first fixing portion is arranged between the first stepped structure and the first edge beam.

[0014] In one of the embodiments, the first fixing member has a first mounting opening.

[0015] In one of the embodiments, the lower surface of the first fixing member is a first arc-shaped curved surface extending along the width direction of the first fixing member and recessed inward.

[0016] In one of the embodiments, the second edge beam has a third fixing member and a fourth fixing member arranged at the side facing the first edge beam, and the third fixing member and the fourth fixing member are both used for fixing the battery module, and the height of the third fixing member is higher than that of the fourth fixing member.

[0017] The third fixing member has an extension width smaller than that of the fourth fixing member.

[0018] The third fixing member has a second mounting surface for mounting the battery module, and the second mounting surface is arranged obliquely downward.

[0019] The fourth fixing member has a second fixing portion for fixing the battery module, and the fourth fixing member has a second stepped structure at the end away from the second edge beam, and the second fixing portion is arranged between the second stepped structure and the second edge beam.

[0020] The third fixing member has a second mounting opening.

[0021] The lower surface of the third fixing member is a second arc-shaped curved surface extending along the width direction of the third fixing member and recessed inward.

[0022] The second aspect of the utility model discloses a battery system comprising the box structure.

[0023] Beneficial effects:

[0024] The box body structure of the utility model includes bottom plate and beam assembly, beam assembly sets up on the bottom plate, and beam assembly and bottom plate enclose into installation cavity, and installation cavity is used for installing battery module;Beam assembly includes connected first end beam, first side beam, second end beam and second side beam, first end beam and second end beam are oppositely arranged, and first side beam and second side beam are oppositely arranged.The side of first side beam towards second side beam extends and is provided with first fixing part and second fixing part, and first fixing part and second fixing part are used for fixing battery module, and the height of first fixing part is higher than the height of second fixing part.Through the first fixing part and the second fixing part of different heights, the multilayer stacked battery module is fixed, can be stably fixed in the battery box, avoids the displacement and loosening of multilayer stacked battery module, can improve the service life of battery module, reduces the security risk. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the structure schematic view of the box body structure of an embodiment of the utility model.

[0026] Figure 2 It is the structure schematic view of the first side beam of an embodiment of the utility model.

[0027] Figure 3 It is Figure 2 The enlarged view of A in the figure.

[0028] Figure 4 It is the structure schematic view of the second side beam of an embodiment of the utility model.

[0029] Figure 5 It is Figure 4 The enlarged view of B in the figure.

[0030] Wherein:

[0031] 100, bottom plate;

[0032] 200, beam assembly;210, first end beam;220, first side beam;230, second end beam;240, second side beam;

[0033] 310, first fixing part;311, first mounting surface;312, mounting hole;313, first installation port;314, first arc curved surface;

[0034] 320, second fixing part;321, first fixing part;322, first stepped structure;

[0035] 400, reinforcing part;

[0036] 510, third fixing part;511, second mounting surface;513, second installation port;514, second arc curved surface;

[0037] 520, fourth fixing member; 521, second fixing part; 522, second stepped structure.

[0038] The implementation, functional features and advantages of the utility model will be further explained in combination with embodiments and with reference to the drawings. DETAILED DESCRIPTION

[0039] It should be understood that the specific embodiments described herein merely serve to explain the utility model and do not serve to limit the utility model.

[0040] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically defined.

[0041] In the description of the utility model, it should be noted that, unless otherwise specifically defined and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0042] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature, can include that first and second features are direct contact, also can include that first and second features are not direct contact but contact through other feature between them.Moreover, first feature is "on", "above" and "on" second feature, includes that first feature is directly above and obliquely above second feature, or only indicates that first feature horizontal height is higher than second feature.First feature is "under", "below" and "under" second feature, includes that first feature is directly below and obliquely below second feature, or only indicates that first feature horizontal height is less than second feature.

[0043] In some embodiments, a battery system includes a box structure.

[0044] As shown in the figure, in some embodiments, a box structure is applied to the above-mentioned battery system. Figures 1 to 5 A box structure includes a bottom plate 100 and a beam assembly 200, the beam assembly 200 is arranged on the bottom plate 100, and the beam assembly 200 and the bottom plate 100 enclose an installation cavity for installing battery modules.

[0045] By fixing the multi-layer stacked battery modules through the first fixing member 310 and the second fixing member 320 of different heights, the multi-layer stacked battery modules can be stably fixed in the battery box, avoiding displacement and loosening of the multi-layer stacked battery modules, improving the service life of the battery modules and reducing safety hazards.

[0046] Specifically, the bottom plate 100 provides bottom support for the entire box structure.

[0047] Specifically, the beam assembly 200 is installed on the bottom plate 100, and the beam assembly 200 and the bottom plate 100 jointly enclose an installation cavity.

[0048] Specifically, the beam assembly 200 can be a regular rectangular frame structure. The first end beam 210, the first side beam 220, the second end beam 230 and the second side beam 240 can each be a rectangular plate structure. The first end beam 210 is arranged in parallel with the second end beam 230. The first side beam 220 is arranged in parallel with the second side beam 240.

[0049] It should be noted that, since the first end beam 210 and the second end beam 230 are arranged in parallel, when the battery module is placed in the mounting cavity, the pressure generated by the weight of the battery module in the length direction of the box structure can be evenly distributed on the first end beam 210 and the second end beam 230. Similarly, the first side beam 220 and the second side beam 240 are arranged in parallel, so that the pressure of the battery module in the width direction of the box structure can be evenly distributed on the first side beam 220 and the second side beam 240. This parallel rectangular frame structure has good stability. The corners of the rectangular frame can effectively transmit and disperse force, so that the entire box structure can maintain a stable shape and is not easily twisted or deformed.

[0050] In some embodiments, along the height direction of the first side beam 220, the first fixing member 310 is arranged at the middle of the first side beam 220. Along the height direction of the first side beam 220, the second fixing member 320 is arranged at the bottom of the first side beam 220. The height direction of the first side beam 220 is the Z-axis direction in the coordinate system shown in FIG. 1. Figure 1

[0051] It should be noted that the height difference design of the first fixing member 310 and the second fixing member 320 is suitable for the installation of multi-layer battery modules. When installing multi-layer battery modules, the lower second fixing member 320 can be used to fix the lower layer of battery modules, and the higher first fixing member 310 can be used to fix the upper layer of battery modules. In this way, by arranging the first fixing member 310 and the second fixing member 320 at different heights, the battery modules can be fixed from different vertical positions, thereby meeting the fixing of multi-layer stacked battery modules.

[0052] In some embodiments, the extension width of the first fixing member 310 is smaller than the extension width of the second fixing member 320. The first fixing member 310 can be a long strip-shaped block structure. The second fixing member 320 can be a long strip-shaped plate structure. The extension width is the X-axis direction in the coordinate system shown in FIG. 1. Figure 1

[0053] ​​It should be noted that the second fixing member 320 needs to fix the bottom layer of battery modules, and needs to have a larger extension width to provide a wider support surface. The bottom layer of battery modules usually bears the weight of all the battery modules above it, and a larger extension width can better disperse the pressure and ensure the stability of the bottom of the battery modules. The first fixing member 310 mainly fixes the battery modules in the middle layer laterally, and a relatively small extension width can meet the fixing requirements while avoiding occupying too much space and reducing interference with the installation of the upper layer of battery modules.

[0054] In some embodiments, the first fixing member 310 has a first mounting surface 311 on it, and the first mounting surface 311 is used to mount the battery modules, and the first mounting surface 311 is arranged obliquely downward.

[0055] It should be noted that the first mounting surface 311 is arranged on the upper surface of the first fixing member 310. The first mounting surface 311 is the part used to directly mount the battery modules. The first mounting surface 311 is not horizontal, but forms a certain angle with the horizontal direction, and the lower end is closer to the bottom of the first side beam 220. In the layout of multiple layers of battery modules, the obliquely downward first mounting surface 311 can better adapt to the shape and size of the battery modules. Since the shape of the battery modules itself can be a regular shape such as a cuboid, the inclined mounting surface can provide an inclined angle for the battery modules in the vertical direction, avoiding interference between the battery modules and the upper layer of battery modules or the top structure of the box in space, so that the battery modules can be more reasonably distributed in the installation cavity.

[0056] Specifically, a plurality of mounting holes 312 can be arranged on the first mounting surface 311. The battery modules are fixed in the mounting holes 312 by fasteners. The plurality of mounting holes 312 are arranged at intervals along the length direction of the first fixing member 310. Specifically, the fasteners can be bolts or screws, etc. By arranging a plurality of mounting holes 312 on the first mounting surface 311, multi-point fixing of the battery modules can be achieved. When the battery modules are fixed in these mounting holes 312 using fasteners, the battery modules are connected to the first fixing member 310 at multiple points, thereby forming a stable fixing structure. This multi-point fixing method can effectively disperse the force of the battery modules on the first fixing member 310, avoid the case of excessive local stress caused by single-point fixing, and reduce damage to the first fixing member 310.

[0057] Specifically, the plurality of mounting holes 312 are equidistantly arranged along the length direction of the first fixing member 310. Equidistant distribution can ensure that the force applied by the fasteners is evenly distributed in the length direction of the first fixing member 310 when fixing the battery modules. In this way, the fixing force on the first fixing member 310 is relatively uniform at each fixing point, which helps to maintain the level and stability of the battery modules and prevent the battery modules from being twisted or deformed in the length direction due to uneven stress.

[0058] In some embodiments, the second fixing member 320 is provided with a first fixing portion 321 for fixing the battery module, and the second fixing member 320 has a first stepped structure 322 at an end away from the first side beam 220, and the first fixing portion 321 is arranged between the first stepped structure 322 and the first side beam 220. The first fixing portion 321 directly fixes the battery module, and the first stepped structure 322 can provide additional support and limiting action in the local area of the edge or bottom of the battery module.

[0059] In some embodiments, the first fixing member 310 is provided with a first mounting port 313. The first mounting port 313 can be used to mount other beam structures. Specifically, the first mounting port 313 can be provided with a plurality of.

[0060] In some embodiments, the lower surface of the first fixing member 310 is a first arc-shaped curved surface 314 extending in the width direction of the first fixing member 310 and recessed inward. The width direction of the first fixing member 310 is the same as the length direction of the first end beam 210.

[0061] In some embodiments, the box structure includes a reinforcing member 400, one end of the reinforcing member 400 is connected with the first side beam 220, the other end is connected with the second side beam 240, and the bottom of the reinforcing member 400 is connected with the bottom plate 100. The reinforcing member 400 can improve the overall stability of the box structure and effectively prevent the box from deforming.

[0062] Specifically, the reinforcing member 400 can be a reinforcing beam.

[0063] In some embodiments, the second side beam 240 is provided with a third fixing member 510 and a fourth fixing member 520 extending towards the side surface of the first side beam 220, both of which are used for fixing the battery module, and the height of the third fixing member 510 is higher than that of the fourth fixing member 520. The structure of the third fixing member 510 is the same as that of the first fixing member 310. The structure of the fourth fixing member 520 is the same as that of the second fixing member 320.

[0064] Specifically, the extension width of the third fixing member 510 is less than that of the fourth fixing member 520.

[0065] Specifically, the third fixing member 510 has a second mounting surface 211 for mounting the battery module, and the second mounting surface 211 is inclined downward.

[0066] Specifically, the fourth fixing member 520 is provided with a second fixing portion 521 for fixing the battery module, and the fourth fixing member 520 has a second stepped structure 522 at an end away from the second side beam 240, and the second fixing portion 521 is arranged between the second stepped structure 522 and the second side beam 240.

[0067] Specifically, the third fixing member 510 is provided with a second mounting opening 513.

[0068] Specifically, the lower surface of the third fixing member 510 is a second arc-shaped surface 514 extending along the width direction of the third fixing member 510 and inwardly recessed.

[0069] The above is only the preferred embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, is also included in the patent protection range of the present application.

Claims

1. A box structure, characterized by, The box structure comprises a bottom plate and a beam assembly arranged on the bottom plate, and the beam assembly and the bottom plate enclose a mounting cavity for mounting a battery module; the beam assembly comprises a first end beam, a first side beam, a second end beam and a second side beam connected together, and the first end beam and the second end beam are arranged oppositely, and the first side beam and the second side beam are arranged oppositely. The side of the first side beam extending towards the second side beam is provided with a first fixing member and a second fixing member, and the first fixing member and the second fixing member are both used for fixing the battery module, and the height of the first fixing member is higher than the height of the second fixing member.

2. The box structure of claim 1, wherein, The box structure comprises a reinforcing member, one end of the reinforcing member is connected with the first side beam, the other end of the reinforcing member is connected with the second side beam, and the bottom of the reinforcing member is connected with the bottom plate.

3. The box structure of claim 1, wherein, Along the height direction of the first side beam, the first fixing member is arranged at the middle part of the first side beam; and / or Along the height direction of the first side beam, the second fixing member is arranged at the bottom of the first side beam.

4. The box structure of claim 1, wherein, The extension width of the first fixing member is smaller than the extension width of the second fixing member.

5. The box structure of claim 1, wherein, The first fixing member is provided with a first mounting surface for mounting the battery module, and the first mounting surface is arranged obliquely downward.

6. The box structure of claim 1, wherein, The second fixing member is provided with a first fixing part for fixing the battery module, and one end of the second fixing member away from the first side beam has a first stepped structure, and the first fixing part is arranged between the first stepped structure and the first side beam.

7. The box structure of claim 1, wherein The first fixing member is provided with a first mounting opening.

8. The box structure of claim 1, wherein, The lower surface of the first fixing member is a first arc-shaped curved surface extending along the width direction of the first fixing member and recessed inward.

9. The box structure of claim 1, wherein, The side of the second side beam extending towards the first side beam is provided with a third fixing member and a fourth fixing member, and the third fixing member and the fourth fixing member are both used for fixing the battery module, and the height of the third fixing member is higher than the height of the fourth fixing member. The extension width of the third fixing member is smaller than the extension width of the fourth fixing member. The third fixing member is provided with a second mounting surface for mounting the battery module, and the second mounting surface is arranged obliquely downward. The fourth fixing member is provided with a second fixing part for fixing the battery module, and one end of the fourth fixing member away from the second side beam has a second stepped structure, and the second fixing part is arranged between the second stepped structure and the second side beam. The third fixing member is provided with a second mounting opening. The lower surface of the third fixing member is a second arc-shaped curved surface extending along the width direction of the third fixing member and recessed inward.

10. A battery system characterized by, The box structure comprises any one of claims 1 to 9. The box structure comprises any one of claims 1 to 9.

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