Box body edge beam, battery pack and electric equipment

Abstract

The utility model provides a box body boundary beam, battery pack and electric equipment, the box body boundary beam comprises a boundary beam body and a reinforcing piece connected to the boundary beam body, the reinforcing piece is used for embedding a filling piece so as to bear the filling piece in the thickness direction of the filling piece, and therefore the bearing effect of the box body boundary beam on the filling piece in the battery pack is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, specifically to a box side beam, a battery pack, and an electrical device. Background Technology

[0002] In related technologies, existing battery packs, after assembling nearly 1,000 cells, are glued and encapsulated together within the battery pack using an adhesive structure. The adhesive structure serves to fix the structure, and the bonding interface between the cells and the casing is the bottom edge and the inside of the casing's frame. The adhesive force consists of pull-out force from the bottom surface and shear force from the side wall. In actual testing and operating environments, there are harsh conditions such as aging of the adhesive structure and strong impacts in the direction of gravity. For example, the structural adhesive may crack or shrink in low-temperature environments, or the adhesive strength may decline after durability and aging. These conditions pose a risk of adhesive structure failure. In mechanical impact tests, adhesive cracking is likely to occur, leading to the separation of the integrated glued cells from the casing and resulting in adhesive failure.

[0003] Therefore, in related technologies, the side beams of the box girder are prone to adhesive failure with the glued structure. Utility Model Content

[0004] The embodiments of this utility model provide a box side beam, a battery pack, and electrical equipment, which can improve the technical problem in the prior art where the box side beam is prone to adhesive failure with the adhesive structure.

[0005] In a first aspect, embodiments of the present invention provide a box-shaped side beam for a battery pack, the battery pack comprising a box body, a plurality of battery cells, and a filler, the filler being filled between and connected to the plurality of battery cells, the box-shaped side beam comprising:

[0006] The side beam body is used to connect with the main body of the box and to enclose the installation space with the main body of the box for installing multiple battery cells and the filler;

[0007] The box-shaped side beam further includes a reinforcing member connected to the side beam body. The reinforcing member is used to embed the filler to support the filler in the thickness direction of the filler.

[0008] In one embodiment, the width of the reinforcement in the embedding direction ranges from 15 mm to 35 mm.

[0009] In one embodiment, the thickness of the reinforcement ranges from 2.5 mm to 3.5 mm.

[0010] In one embodiment, the side beam body includes a first body portion and a second body portion, the first body portion and the second body portion are connected to each other and form a receiving space to receive a portion of the filler, and the reinforcing member is connected to the first body portion and disposed opposite to the second body portion.

[0011] In one embodiment, the reinforcing member is disposed at a height of one-third to two-thirds between the top surface of the second body portion and the top surface of the filler.

[0012] In one embodiment, the first body portion is used to connect with the top cover of the main body of the box, and the second body portion is used to connect with the bottom plate of the main body of the box.

[0013] In one embodiment, a mounting bracket for assembly with the vehicle is also included, the mounting bracket being connected to the first body portion and located on the side of the first body portion away from the second body portion.

[0014] In one embodiment, the reinforcing member, the side beam body, and the mounting connection bracket are integrally formed.

[0015] In one embodiment, the reinforcing member is a sheet-like structure or a cavity-type rib structure.

[0016] Secondly, embodiments of the present invention provide a battery pack, including a box side beam as described in any of the above embodiments.

[0017] Thirdly, embodiments of this utility model provide an electrical device, including a box side beam as described in any of the above embodiments, or including a battery pack as described in the above embodiments.

[0018] The beneficial effects of the embodiments of this utility model are as follows:

[0019] In an embodiment of this utility model, by further including a reinforcing member connected to the side beam body, the reinforcing member is used to embed the filler to support the filler in the thickness direction of the filler, thereby enhancing the load-bearing effect of the side beam on the filler in the battery pack and improving the technical problem in the prior art where the side beam of the box is prone to adhesive failure with the adhesive structure. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a first three-dimensional schematic diagram of the box-shaped side beam provided in an embodiment of this utility model;

[0022] Figure 2 This is a second perspective view of the box-shaped side beam provided in an embodiment of this utility model;

[0023] Figure 3 This is a schematic diagram of the battery pack structure provided in an embodiment of the present invention. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0025] Furthermore, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different technical features. The terms "multiple" and similar words indicate two or more unless otherwise expressly specified.

[0026] Please see Figure 1 and Figure 2 The side beam 1 of the box body provided in the embodiment of this utility model includes a side beam body 10. The side beam body 10 is used to connect with the box body 2 and form an installation space with the box body 2 to install multiple battery cells 3 and fillers 4. The side beam 1 of the box body also includes a reinforcing member 30 connected to the side beam body 10. The reinforcing member 30 is used to embed the filler 4 to support the filler 4 in the thickness direction of the filler 4.

[0027] Among them, the side beam 1 of the box is used for the battery pack. The battery pack includes the box body 2, multiple battery cells 3 and filler 4. The filler 4 fills between the multiple battery cells 3 and is connected to the multiple battery cells 3.

[0028] Among them, multiple battery cells 3 are electrically connected to each other.

[0029] In this embodiment, by including a reinforcing member 30 connected to the side beam body 10 of the box body side beam 1, the reinforcing member 30 is used to embed the filler 4 to support the filler 4 in the thickness direction of the filler 4, thereby enhancing the load-bearing effect of the box body side beam 1 on the filler 4 in the battery pack, and improving the technical problem in the prior art that the box body side beam 1 is prone to adhesive failure with the adhesive structure.

[0030] The technical solution of this application will now be described in conjunction with specific embodiments.

[0031] In one embodiment, the reinforcing member 30 can be a reinforcing rib connected to the side beam 1 of the box body, and the filler 4 can be an adhesive structure.

[0032] The adhesive structure is used to encapsulate multiple battery cells 3, so that the battery cells 3 are wrapped by the adhesive structure. The reinforcing member 30 is embedded in the filler 4 to support the filler 4, thereby indirectly achieving the support and fixation of the battery cells 3.

[0033] In one embodiment, please refer to Figure 3 The width of the reinforcing member 30 in the embedding direction ranges from 15 mm to 35 mm.

[0034] The width of the reinforcing member 30 in the embedding direction is any one of 15 mm, 20 mm, 25 mm, 30 mm, or 35 mm.

[0035] Understandably, within the width range of 15 mm to 35 mm, the greater the width of the reinforcing member 30 in the embedding direction, the better the reinforcing member 30 will limit and fix the battery cell 3 and its filler 4.

[0036] Understandably, the main function of the reinforcing member 30 embedded in the filler 4 is to limit and fix the battery cell 3 and its filler 4 under the impact condition in the direction of gravity.

[0037] It should be noted that since the reinforcing member 30 is embedded in the filler 4 to support the battery cell 3 and its filler 4 along the direction of gravity, when the embedding amount is less than 15 mm, the limiting and fixing effect of the reinforcing member 30 on the battery cell 3 and its filler 4 is limited. When the embedding amount is greater than 35 mm, the embedding amount will exceed the gap between the battery cell 3 and the side beam 1 of the housing, which will affect and damage the battery cell 3, and will also affect the assembly process.

[0038] In this embodiment, by making the width of the reinforcing member 30 in the embedding direction range from 15 mm to 35 mm, it can play a better role in limiting and fixing the battery cell 3 and its filler 4 without affecting the assembly process.

[0039] In one embodiment, the thickness of the reinforcing member 30 ranges from 2.5 mm to 3.5 mm.

[0040] Among them, the top surface of the reinforcing member 30 does not exceed the upper boundary of the side beam body 10, and the bottom surface of the reinforcing rib does not exceed the lower boundary of the side beam body 10.

[0041] The thickness of the reinforcing member 30 can be any one of 2.5 mm, 2.8 mm, 3 mm, 3.2 mm, or 3.5 mm.

[0042] The thickness of the reinforcing member 30 is the thickness along the direction of gravity.

[0043] Understandably, within the thickness range of 2.5 mm to 3.5 mm, the greater the thickness of the reinforcing member 30, the stronger the structural strength of the reinforcing member 30, and the less likely the reinforcing member 30 is to break, thus making the reinforcing member 30 have a better and more stable load-bearing effect on the filler 4.

[0044] It should be noted that when the thickness of the reinforcing member 30 is less than 2.5 mm, the insufficient thickness of the reinforcing member 30 will affect the structural strength of the reinforcing member 30, leading to the reinforcing member 30 breaking or becoming abnormal; when the thickness of the reinforcing member 30 is greater than 3.5 mm, the thickness of the reinforcing member 30 is too large, and the reinforcing member 30 is likely to exceed the upper and lower boundaries of the side beam body 10, thereby increasing the overall thickness of the box side beam 1.

[0045] In this embodiment, by making the thickness of the reinforcing member 30 range from 2.5 mm to 3.5 mm, the overall thickness of the box side beam 1 is not increased, while the structural strength of the reinforcing member 30 is enhanced, thereby increasing the load-bearing effect of the reinforcing member 30 on the filler 4.

[0046] In one embodiment, the side beam body 10 includes a first body part 101 and a second body part 102. The first body part 101 and the second body part 102 are connected to each other and form a receiving space to receive a part of the filler 4. The reinforcing member 30 is connected to the first body part 101 and disposed opposite to the second body part 102.

[0047] The number of cavities inside the first body part 101 is greater than the number of cavities inside the second body part 102.

[0048] The second body part 102 is located at the bottom end of the first body part 101.

[0049] The second body part 102 is provided with a stepped part at the end away from the first body part 101.

[0050] The stepped portion includes a first part close to the second body portion 102 and a second part away from the second body portion 102. The first part of the stepped portion is connected to the second body portion 102, and the second part of the stepped portion is inserted below the battery cell 3 to support the battery cell 3.

[0051] The first part has a cavity-shaped rib structure, and the second part has a sheet-like structure.

[0052] It is understandable that an exhaust port can be formed at the bottom of the first part. The exhaust gas generated by the battery cell 3 enters the cavity inside the first part through the exhaust port and is discharged to the explosion-proof valve through the cavity inside the first part, so as to avoid the exhaust gas generated by the battery cell 3 being unable to be discharged and causing air entrapment.

[0053] In this embodiment, a step is provided at one end of the second body part 102 of the side beam body 10 away from the first body part 101. The first part of the step is used to discharge the exhaust gas generated by the battery cell 3 to avoid air trapping. The second part of the step is used to insert below the battery cell 3 to support the battery cell 3, and also serves to limit and fix the battery cell 3 and its filler 4.

[0054] In one embodiment, the reinforcing member 30 is disposed at a height of one-third to two-thirds between the top surface of the second body portion 102 and the top surface of the filler 4.

[0055] The reinforcing member 30 is located above the top surface of the second body part 102.

[0056] The reinforcing member 30 is filled with filler 4 above and below it.

[0057] The reinforcing member 30 can be positioned at any one-third, one-half, or two-thirds of the height between the top surface of the second body part 102 and the top surface of the filler 4.

[0058] It is understandable that the closer the reinforcing member 30 is located between the top surface of the second body part 102 and the top surface of the filler 4, the closer the thickness of the filler 4 on both sides of the reinforcing member 30 is to the halfway point. This makes the reinforcing member 30 have a better limiting and fixing effect on the battery cell 3 and its filler 4 in the direction of gravity.

[0059] It should be noted that when the reinforcing member 30 is positioned at a height of less than one-third or more than two-thirds between the top surface of the second body part 102 and the top surface of the filler 4, the thickness of the filler 4 on one side of the reinforcing member 30 along the thickness direction will be insufficient, resulting in the reinforcing member 30 not effectively limiting and fixing the battery cell 3 and its filler 4 in the direction of gravity.

[0060] In this embodiment, the reinforcing member 30 is positioned at a height of one-third to two-thirds between the top surface of the second body part 102 and the top surface of the filler 4, which further improves the limiting and fixing effect of the reinforcing member 30 on the battery cell 3 and its filler 4 in the direction of gravity.

[0061] In one embodiment, the first body part 101 is used to connect with the top cover 40 of the box body 2, and the second body part 102 is used to connect with the bottom plate 50 of the box body 2.

[0062] The first body part 101 and the top cover 40 of the box body 2 can be connected by bolts and screw holes, and the second body part 102 and the bottom plate 50 can be connected by bolts and screw holes.

[0063] The second body part 102 has screw holes at positions corresponding to the base plate 50, and bolts pass through the screw holes to connect the second body part 102 to the base plate 50.

[0064] In this embodiment, the first body part 101 and the second body part 102 are connected to the top cover 40 and the bottom plate 50 of the main body 2, respectively, which enhances the overall structural strength of the box and forms an installation space. The installation space is used to accommodate the battery cell 3 and the filler 4, thereby improving the structural stability of the battery pack.

[0065] In one embodiment, a mounting bracket 20 for assembly with the vehicle is also included. The mounting bracket 20 is connected to the first body portion 101 and is located on the side of the first body portion 101 away from the second body portion 102.

[0066] The mounting bracket 20 has multiple connection holes for fixing it to the vehicle body.

[0067] The connecting hole can be a round hole with a thread on the inside, and it is fixedly connected to the vehicle body by a matching bolt.

[0068] It is understandable that the mounting bracket 20 is used to connect to the vehicle body, so that the battery pack can be assembled with the vehicle through the side beam 1 of the housing, and the reliability of the assembly with the vehicle is improved by mounting the mounting bracket 20.

[0069] In this embodiment, the assembly with the vehicle is achieved through the mounting and connecting bracket 20 on the side beam 1 of the box body, which improves the reliability of the assembly with the vehicle.

[0070] In one embodiment, please refer to Figure 1 and Figure 2 The reinforcing component 30, the side beam body 10, and the mounting and connecting bracket 20 are integrally formed.

[0071] Among them, the reinforcing member 30, the side beam body 10, and the mounting and connecting bracket 20 can all be prepared by extrusion.

[0072] The reinforcing member 30, the side beam body 10, and the mounting and connecting bracket 20 can be made of the same material.

[0073] Among them, the reinforcing member 30, the side beam body 10, and the mounting connection bracket 20 of the box body side beam 1 are all integrally formed, and the reinforcing member 30, the side beam body 10, and the mounting connection bracket 20 of the box body side beam 1 can be prepared using a set of extrusion profile molds.

[0074] Within the same battery pack, the side beams 1 of the housing located on both sides of the battery cell 3 are symmetrically arranged.

[0075] It is understandable that the side beams 1 of the housing located on both sides of the battery cell 3 can share a set of extrusion profile molds, thereby reducing costs.

[0076] In this embodiment, by integrally molding the reinforcing member 30, the side beam body 10, and the mounting connection bracket 20, the manufacturing process can be simplified and the cost reduced.

[0077] In one embodiment, the reinforcing member 30 is a sheet-like structure or a cavity-type rib structure.

[0078] The sheet-like structure can be either planar or curved.

[0079] Among them, the reinforcing member 30 has a cavity-type rib structure, and the cavity-type rib structure may include at least one cavity.

[0080] It is understandable that, compared to a planar sheet structure, the adhesive area between the reinforcing member 30 and the filler 4 of a curved sheet structure is larger, which can further improve the effect of the reinforcing member 30 in fixing and limiting the filler 4.

[0081] It is understandable that by using a cavity-type rib structure embedded in the filler 4, the adhesive area between the reinforcing member 30 and the filler 4 can be further increased, thereby enhancing the bonding force between the reinforcing member 30 and the filler 4.

[0082] In this embodiment, the reinforcing member 30 has a sheet-like structure or a cavity-type rib structure. By embedding the reinforcing member 30 into the filler 4, the adhesive area between the box side beam 1 and the filler 4 can be increased, thereby enhancing the bonding force between the box side beam 1 and the filler 4.

[0083] In one embodiment, the reinforcing member 30 extends perpendicularly to the side of the first body portion 101.

[0084] The reinforcing member 30 is disposed on the side of the first body part 101.

[0085] The side is the side of the first body 101 that is away from the mounting and connecting bracket 20.

[0086] It is understandable that if the rib is horizontally offset upward or downward by a certain angle, the impact of gravity and the load-bearing and fixing of the battery cell 3 module will be weakened, so that the extension direction of the reinforcing member 30 is perpendicular to the side, which can further enhance the effect of the reinforcing member 30 on the load-bearing, fixing and limiting of the filler 4.

[0087] It should be noted that when the extension direction of the reinforcing member 30 is at a certain angle to the side, the adhesive structure has fluidity when filling the battery cell 3 in the potting box. This makes it easy for the angle between the reinforcing member 30 and the side not to be filled by the adhesive structure, resulting in a gap between the adhesive structure and the reinforcing member 30, which in turn leads to insufficient adhesive area or poor adhesive effect.

[0088] In this embodiment, the extension direction of the reinforcing member 30 is perpendicular to the side of the first body part 101. This not only enables the reinforcing member 30 to play a better role in bearing and fixing in the thickness direction of the filler 4, but also allows the adhesive structure to fully contact the reinforcing member 30, avoiding the formation of gaps between the adhesive structure and the reinforcing member 30, which would result in insufficient adhesive area or poor adhesive effect.

[0089] In one embodiment, the box body is welded together from four side beams 1 (left, right, front, and rear) and connected to the base plate 50 for assembly.

[0090] Among them, after the battery cell 3 is stacked, tooled and positioned and welded outside the box, it is put into the box from the top. Then, the battery cell 3 is glued to the box and finally the top cover 40 is assembled.

[0091] Secondly, please refer to Figure 3 The battery pack provided in the embodiments of this utility model includes the box side beam 1 as described in any of the above embodiments.

[0092] The battery pack includes a main body 2, multiple battery cells 3 and a filler 4, with the filler 4 filling between the multiple battery cells 3 and connecting to the multiple battery cells 3.

[0093] Thirdly, the electrical equipment provided in the embodiments of this utility model includes the box side beam 1 as in any of the above embodiments, or includes the battery pack as in the above embodiments.

[0094] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A box-type side beam (1), characterized in that, For a battery pack, the battery pack includes a housing body (2), multiple battery cells (3), and a filler (4), the filler (4) filling between the multiple battery cells (3) and connecting to the multiple battery cells (3), the housing side beam (1) including: Side beam body (10) is used to connect with the box body (2) and form an installation space with the box body (2) to install multiple battery cells (3) and filler (4); The box body side beam (1) further includes a reinforcing member (30) connected to the side beam body (10). The reinforcing member (30) is used to embed the filler (4) to support the filler (4) in the thickness direction of the filler (4).

2. The box girder (1) according to claim 1, characterized in that, The width of the reinforcing member (30) in the embedding direction ranges from 15 mm to 35 mm.

3. The box girder (1) according to claim 1, characterized in that, The thickness of the reinforcing member (30) ranges from 2.5 mm to 3.5 mm.

4. The box girder (1) according to any one of claims 1 to 3, characterized in that, The side beam body (10) includes a first body part (101) and a second body part (102). The first body part (101) and the second body part (102) are connected to each other and form a receiving space to receive a part of the filler (4). The reinforcing member (30) is connected to the first body part (101) and is disposed opposite to the second body part (102).

5. The box-type side beam (1) according to claim 4, characterized in that, The reinforcing member (30) is located at a height of one-third to two-thirds between the top surface of the second body part (102) and the top surface of the filler (4).

6. The box girder (1) according to claim 4, characterized in that, The first body part (101) is used to connect with the top cover (40) of the box body (2), and the second body part (102) is used to connect with the bottom plate (50) of the box body (2).

7. The box girder (1) according to claim 4, characterized in that, It also includes a mounting bracket (20) for assembly with the vehicle, the mounting bracket (20) being connected to the first body part (101) and located on the side of the first body part (101) away from the second body part (102).

8. The box girder (1) according to claim 7, characterized in that, The reinforcing member (30), the side beam body (10), and the mounting connection bracket (20) are integrally formed.

9. The box girder (1) according to any one of claims 1 to 3, characterized in that, The reinforcing member (30) has a sheet-like structure or a cavity-type rib structure.

10. A battery pack, characterized in that, Includes the box girder (1) as described in any one of claims 1 to 9.

11. An electrical appliance, characterized in that, It includes the box side beam (1) as described in any one of claims 1 to 9, or the battery pack as described in claim 10.

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