Box beam, battery pack box and battery pack

Abstract

The utility model provides a box body beam, a battery pack box body and a battery pack, relates to the technical field of batteries, and aims to solve the technical problem of long manufacturing period caused by an integral plate structure of the box body beam in the related technology. The box body beam comprises a first main body and a second main body; the second main body and the first main body are arranged in a split mode, an opening is formed in at least one of the section of the first main body and the section of the second main body, and the first main body and the second main body are connected on the two sides of the opening and close the opening.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a box beam, a battery pack box and a battery pack. Background Art

[0002] Box beams usually need to be manufactured using a dedicated rolling die, but the production line of the rolling die is expensive and has a long development cycle, making it difficult to meet the cycle requirements of rapid development projects.

[0003] In the related art, the box beam is usually processed from a whole plate. Since the whole plate needs to be bent multiple times and enclosed to form a box beam with closed side openings, it can only be processed using a rolling mold, which prolongs the manufacturing cycle of the box beam. Utility Model Content

[0004] The embodiments of the utility model provide a box beam, a battery pack box and a battery pack, which can improve the technical problem of a long manufacturing cycle caused by the whole plate structure of the box beam in the related art.

[0005] In the first aspect, an embodiment of the utility model provides a box beam, which includes a first main body and a second main body; the second main body is separately arranged from the first main body, at least one of the cross-sections of the first main body and the second main body is provided with an opening, and the first main body and the second main body are connected on both sides of the opening and close the opening.

[0006] In some embodiments, the first body includes a first bending portion, a cross section of the first bending portion is provided with a first opening, and the first body and the second body are connected at both sides of the first opening to close the first opening.

[0007] In some embodiments, the second body includes a second bending portion, a cross section of the second bending portion is provided with a second opening, and the first body and the second body are connected at both sides of the second opening to close the second opening.

[0008] In some embodiments, the first body and the second body together form an inner cavity, the third pressure-bearing section is located in the inner cavity and divides the inner cavity into two hollow chambers, and the third pressure-bearing section is provided in one of the first body and the second body and connected to the other.

[0009] In some embodiments, the first body includes a first pressure-bearing section, a first bending section, a second pressure-bearing section, a second bending section and a third pressure-bearing section connected in sequence; the first pressure-bearing section and the third pressure-bearing section are arranged opposite to each other; the second body includes a fourth pressure-bearing section, a third bending section, a fifth pressure-bearing section, a fourth bending section and a sixth pressure-bearing section connected in sequence, and the fourth pressure-bearing section and the sixth pressure-bearing section are arranged opposite to each other; wherein the fifth pressure-bearing section and the third pressure-bearing section are arranged opposite to each other, the fourth pressure-bearing section is connected to the second pressure-bearing section, and the third pressure-bearing section and the first pressure-bearing section are respectively connected to the sixth pressure-bearing section.

[0010] In one embodiment, the first body further includes a first auxiliary bending section and a first connecting section located at an end of the third pressure-bearing section away from the second pressure-bearing section and connected in sequence, and the first connecting section is parallel to the sixth pressure-bearing section and connected to each other.

[0011] In one embodiment, the first connecting section is in contact with the sixth pressure-bearing section, a through hole is formed in the sixth pressure-bearing section, and the first connecting section closes the through hole.

[0012] In one embodiment, the second body further includes a second auxiliary bending section and a second connecting section located at an end of the sixth pressure-bearing section away from the fifth pressure-bearing section and connected in sequence, and the second connecting section is parallel to the first pressure-bearing section and connected to each other.

[0013] In one embodiment, the second connecting section is located between the first pressure-bearing section and the third pressure-bearing section.

[0014] In one embodiment, the second pressure-bearing section includes a first sub-pressure-bearing section, a third auxiliary bending section and a second sub-pressure-bearing section connected in sequence, the second sub-pressure-bearing section is connected to a side of the fourth pressure-bearing section close to the sixth pressure-bearing section, and the first sub-pressure-bearing section and the fourth pressure-bearing section are located on the same plane.

[0015] In a second aspect, an embodiment of the present invention provides a battery pack box, which includes the box beam described in any embodiment of the first aspect.

[0016] In one embodiment, a plurality of box beams are provided, and the plurality of box beams are sequentially connected and enclosed to form an accommodating space, and the accommodating space is used to accommodate the battery cell.

[0017] In one embodiment, the battery pack box further includes a plurality of cross-arranged reinforcing ribs, and two ends of the reinforcing ribs are respectively connected to corresponding box beams.

[0018] In a third aspect, an embodiment of the present invention provides a battery pack, which includes the battery pack case described in any embodiment of the second aspect.

[0019] Beneficial effects of the embodiments of the utility model:

[0020] In the embodiment of the utility model, by providing the first body and the second body, on the one hand, it is conducive to process operation and improves the production efficiency of the box beam; on the other hand, it can also avoid the problem of long manufacturing cycle caused by processing the box beam by a whole plate. After the first body and the second body are processed separately, the first body and the second body are enclosed to close the opening, so that the box beam can be manufactured. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 is a cross-sectional schematic diagram of a box beam in the related art;

[0023] Figure 2 It is a partial three-dimensional schematic diagram of a box beam provided in an embodiment of the utility model;

[0024] Figure 3 It is a cross-sectional schematic diagram of a box beam provided in an embodiment of the utility model;

[0025] Figure 4 is a cross-sectional schematic diagram of a first main body provided in an embodiment of the utility model;

[0026] Figure 5 is a cross-sectional schematic diagram of a second main body provided by an embodiment of the utility model;

[0027] Figure 6 is a top view of a battery pack box provided by an embodiment of the utility model;

[0028] Figure 7 It is a partial structural schematic diagram of a battery pack provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure. In the present disclosure, 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 "inside" and "outside" refer to the outline of the device.

[0030] In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", or "some examples" are intended to indicate that a specific feature, structure, material, or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials, or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0031] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0032] When describing some embodiments, the term "connected" and its derivative expressions may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0033] As used herein, "approximately" includes the stated values ​​and averages that are within an acceptable range of deviation from the particular value, where the acceptable range of deviation is determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0034] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0035] Box beams usually need to be made through special rolling dies, but the cost of a rolling die production line is relatively high, usually requiring at least 2 million yuan; and the development cycle of a rolling die production line is relatively long, usually requiring at least three months, which makes it difficult to meet the cycle requirements of rapid development projects.

[0036] In related technologies, such as Figure 1 As shown, the box beam 100' is usually processed from a whole plate. Since the whole plate needs to be bent multiple times and enclosed to form a box beam with a closed side opening, if a low-cost bending process is used, the bending knife of the bending machine is difficult to insert into the box beam with a closed opening for bending, resulting in the box beam 100' being difficult to finally form. Therefore, when manufacturing the box beam 100', only a rolling mold can be used for processing, which results in an increase in the manufacturing cost of the final box beam 100' and a prolonged manufacturing cycle.

[0037] Based on this, the embodiment of the present disclosure provides a box beam, and the material of the box beam in this embodiment is, for example, steel. Figures 2 to 5 As shown, the box beam 100 includes a first main body 10 and a second main body 20 which are separately arranged.

[0038] At least one of the cross section of the first body 10 and the cross section of the second body 20 is provided with an opening K, and the first body 10 and the second body 20 are located on both sides of the opening K and close the opening K.

[0039] Since the first body 10 and the second body 20 are separately provided, the first body 10 and the second body 20 can be processed separately, which is conducive to process operation and improves the production efficiency of the box beam 100; on the other hand, it can also avoid the high manufacturing cost and long manufacturing cycle caused by processing the box beam from a whole plate. After the first body 10 and the second body 20 are processed separately, the first body 10 and the second body 20 are enclosed to close the opening K, and the manufacturing of the box beam 100 can be completed.

[0040] In some embodiments, Figure 4 As shown, the first body 10 includes a first bending portion 101 , a first opening K1 is formed in a cross section of the first bending portion 101 , and the first body 10 and the second body 20 are connected at both sides of the first opening K1 and close the first opening K1 .

[0041] In this way, the box beam 100 can be formed by connecting the first body 10 with the second body 20 and closing the first opening K1, thereby completing the manufacture of the box beam 100.

[0042] In some embodiments, Figure 5As shown, the second body 20 includes a second bending portion 201 , a second opening K2 is provided in a cross section of the second bending portion 201 , and the first body 10 and the second body 20 are connected at both sides of the second opening K2 and close the second opening K2 .

[0043] In this way, the box beam 100 can be formed by connecting the first body 10 to the second body 20 and closing the second opening K2, thereby completing the manufacture of the box beam 100.

[0044] In some embodiments, the first body 10 has a first bending portion 101 , and the second body 20 has a second bending portion 201 . After the first body 10 and the second body 20 are connected, the first opening K1 and the second opening K2 can be closed at the same time.

[0045] In some embodiments, Figure 3 As shown, the first body 10 and the second body 20 together form an inner cavity 30, the third pressure-bearing section 15 is located in the inner cavity 30 and divides the inner cavity 30 into two hollow chambers 301, and the third pressure-bearing section 15 is arranged in one of the first body 10 and the second body 20 and connected to the other.

[0046] Exemplarily, the third pressure-bearing section 15 may be provided on the first body 10 and connected to the second body 20. It should be noted that the third pressure-bearing section 15 may be directly connected to the second body 20 or indirectly connected to the second body 20. When the third pressure-bearing section 15 is indirectly connected to the second body 20, it may be connected to the second body 20 through other components connected thereto (e.g., the first connecting section 17 shown in the figure).

[0047] In this embodiment, the third pressure-bearing section 15 is located in the inner cavity to provide greater support strength for the box beam 100, thereby improving the support stability of the box beam 100. In addition, the third pressure-bearing section 15 is used to separate the two hollow chambers 301, which is conducive to reducing the manufacturing cost of the box beam 100, improving the structural strength, and also contributing to the lightweight design of the box beam 100 and reducing the weight of the box beam 100.

[0048] In some embodiments, Figure 2 and Figure 3 As shown, the first body 10 includes a first pressure-bearing section 11, a first bending section 12, a second pressure-bearing section 13, a second bending section 14 and a third pressure-bearing section 15 which are connected in sequence, wherein the first pressure-bearing section 11 and the third pressure-bearing section 15 are arranged opposite to each other.

[0049] Exemplarily, the first pressure-bearing section 11, the first bending section 12, the second pressure-bearing section 13, the second bending section 14, and the third pressure-bearing section 15 can jointly serve as the first bending part 101 described in some of the above embodiments, and the free end of the first pressure-bearing section 11 (i.e., the end of the first pressure-bearing section away from the first bending section 12) and the free end of the third pressure-bearing section 15 (i.e., the end of the third pressure-bearing section 15 away from the second bending section 14) can jointly define the above-mentioned first opening K1.

[0050] The second main body 20 includes a fourth pressure-bearing section 21, a third bending section 22, a fifth pressure-bearing section 23, a fourth bending section 24, and a sixth pressure-bearing section 25 connected in sequence.

[0051] Exemplarily, the fourth pressure-bearing section 21, the third bending section 22, the fifth pressure-bearing section 23, the fourth bending section 24, and the sixth pressure-bearing section 25 can jointly serve as the second bending part 201 described in some of the above embodiments, and the free end of the fourth pressure-bearing section 21 (i.e., the end of the fourth pressure-bearing section 21 away from the third bending section 22) and the free end of the sixth pressure-bearing section 25 (i.e., the end of the sixth pressure-bearing section 25 away from the fourth bending section 24) can jointly define the above-mentioned second opening K2.

[0052] Among them, the fourth pressure-bearing section 21 and the sixth pressure-bearing section 25 are arranged oppositely, the fifth pressure-bearing section 23 and the third pressure-bearing section 15 are arranged oppositely, and the third pressure-bearing section 15 is located between the first pressure-bearing section 11 and the fifth pressure-bearing section 23. The fourth pressure-bearing section 21 is connected to the second pressure-bearing section 13, and the third pressure-bearing section 15 and the first pressure-bearing section 11 are respectively connected to the sixth pressure-bearing section 25.

[0053] Since the first pressure-bearing section 11 and the third pressure-bearing section 15 are arranged oppositely, the third pressure-bearing section 15 and the first pressure-bearing section 11 are respectively connected to different positions of the sixth pressure-bearing section 25. Exemplarily, the first pressure-bearing section 11 is connected to the end of the sixth pressure-bearing section 25 away from the fourth bending section 24, while the third pressure-bearing section 15 is connected to the middle position of the sixth pressure-bearing section 25.

[0054] In this way, after connecting the above-mentioned pressure-bearing sections, the fixation between the first main body 10 and the second main body 20 can be completed. After the first main body 10 and the second main body 20 are fixed, the longitudinal section of the box girder 100 is roughly in the shape of a Chinese character 'Ri' (日), where the longitudinal section direction of the box girder 100 is perpendicular to the length direction of the box girder 100. Since the box girder 100 has a cross-section in the shape of a Chinese character 'Ri', the pressure-bearing section in the middle of its interior (i.e., the third pressure-bearing section 15) can provide greater support strength, thereby improving the support strength and support stability of the box girder 100; and, two hollow chambers 301 are separated above and below the third pressure-bearing section 15, which is beneficial to reducing the manufacturing cost of the box girder 100, improving the structural strength, and at the same time contributing to the lightweight design of the box girder 100 and reducing the weight of the box girder 100.

[0055] For the above-mentioned box beam 100, since the first main body 10 and the second main body 20 each have only two bending sections, that is, the first main body 10 and the second main body 20 each only need to be bent twice. During this process, the first main body 10 and the second main body 20 always present an open frame structure, and the bending knife of the bending machine can also extend into the inner cavity formed after the box beam is bent, thereby ensuring that the bending process of the first main body 10 and the second main body 20 is carried out smoothly.

[0056] After the first body 10 and the second body 20 are manufactured through the bending process, the first body 10 and the second body 20 can be fixed by connecting the relevant pressure-bearing sections, thereby completing the manufacture of the box beam 100. With such a design, the box beam 100 can be manufactured through a bending process with a lower cost and a wider range of applications, thereby helping to reduce its manufacturing cost and ensure that the box beam 100 has a higher manufacturing efficiency; it can also effectively shorten the manufacturing cycle of the box beam 100.

[0057] In addition, the supporting strength of the box beam 100 provided in the embodiment of the present disclosure can also be close to that of the box beam produced by the rolling process, which is beneficial to ensure that the box beam 100 has a wider range of application scenarios.

[0058] In some examples, such as Figure 3 As shown, the fourth pressure-bearing section 21 can be connected to the second pressure-bearing section 13 to form a first welded formed portion M1, that is, the fourth pressure-bearing section 21 is connected to the second pressure-bearing section 13 by welding. The first welded formed portion has a material that is melted at high temperature and then cooled. By welding, the connection stability of the fourth pressure-bearing section 21 and the second pressure-bearing section 13 can be effectively guaranteed.

[0059] In some examples, the third pressure-bearing segment 15 and the sixth pressure-bearing segment 25 may be connected by welding.

[0060] In some examples, the first pressure-bearing segment 11 and the sixth pressure-bearing segment 25 may be connected by welding.

[0061] In some embodiments, please refer to Figure 2 and Figure 3 The first main body 10 also includes a first auxiliary bending section 16 and a first connecting section 17 located at one end of the third pressure-bearing section 15 away from the second pressure-bearing section 13 and connected in sequence. The first connecting section 17 is parallel to the sixth pressure-bearing section 25 and connected to each other.

[0062] Thus, the first connecting section 17 and the sixth pressure-bearing section 25 can be made parallel to each other through the first auxiliary bending section 16, thereby facilitating the connection of the two. In addition, a larger contact surface can be provided between the first connecting section 17 and the sixth pressure-bearing section 25, thereby further ensuring the connection stability between the two.

[0063] In some examples, such as Figure 3 As shown, the first connecting section 17 is connected to the sixth pressure section 25 and the second welding forming part M2, that is, the first connecting section 17 and the sixth pressure section 25 can be connected by welding. The second welding forming part M2 has a material that is melted at high temperature and then cooled. This is conducive to ensuring good connection stability between the first connecting section 17 and the sixth pressure section 25. At the same time, the cost of this connection method is low, which is conducive to reducing the manufacturing cost of the box beam 100.

[0064] For example, Figure 2 As shown, the first connecting section 17 is in contact with the sixth pressure-bearing section 25, and a through hole 251 is provided on the sixth pressure-bearing section 25. The first connecting section 17 closes the through hole 251, so that there are more interfaces between the first connecting section 17 and the sixth pressure-bearing section 25, which is conducive to welding the first connecting section 17 and the sixth pressure-bearing section 25.

[0065] For example, molten solder may be injected into the through hole 251 , and after the solder solidifies, a good connection may be formed between the first connecting section 17 and the sixth pressure-bearing section 25 .

[0066] For another example, a welding tool may be inserted to melt part of the sixth pressure-bearing section 25 so that the melted part contacts the first connecting section 17 . After the molten material solidifies, a good connection may be formed between the first connecting section 17 and the sixth pressure-bearing section 25 .

[0067] Exemplarily, a plurality of through holes 251 may be provided, and the plurality of through holes 251 are evenly distributed along the length direction X of the first connecting section 17 .

[0068] In some embodiments, please refer to Figure 2 and Figure 3 The second body 20 also includes a second auxiliary bending section 26 and a second connecting section 27 located at an end of the sixth pressure-bearing section 25 away from the fifth pressure-bearing section 23 and connected in sequence. The second connecting section 27 is parallel to the first pressure-bearing section 11 and connected to each other.

[0069] Thus, the second connecting section 27 can be made parallel to the first pressure-bearing section 11 through the second auxiliary bending section 26, thereby facilitating the connection of the two. In addition, the second connecting section 27 and the first pressure-bearing section 11 can also have a larger contact surface, thereby further ensuring the connection stability between the two.

[0070] For example, Figure 3 As shown, the second connecting section 27 is connected to the first pressure section 11 to form a third welded formed portion M3, that is, the second connecting section 27 and the first pressure section 11 can be connected by welding. The third welded formed portion M3 has a material that is melted at high temperature and then cooled. This arrangement is conducive to ensuring good connection stability between the second connecting section 27 and the first pressure section 11. At the same time, the cost of this connection method is low, which is conducive to reducing the manufacturing cost of the box beam 100.

[0071] In some embodiments, please refer to Figure 2 and Figure 3 , the second connecting section 27 is located between the first pressure-bearing section 11 and the third pressure-bearing section 15. That is, the second connecting section 27 is located below the first pressure-bearing section 11.

[0072] Since the second connecting section 27 only serves to connect the first pressure-bearing section 11 and is used to realize the connection between the first pressure-bearing section 11 and the sixth pressure-bearing section 25, the second connecting section 27 can be set to a relatively small width (the width direction of the second connecting section 27 is perpendicular to the thickness direction and the length direction of the second connecting section 27). The first pressure-bearing section 11 has a relatively large width, and the first pressure-bearing section 11 can be used to bear the pressure of the upper component or connect the upper component. The first pressure-bearing section 11 is arranged above the second connecting section 27, which is conducive to ensuring the connection stability between the first pressure-bearing section 11 and the upper component, and the force of the upper component on the first pressure-bearing section 11 can be evenly distributed to a larger connection surface, thereby ensuring the support performance of the box beam 100.

[0073] In some examples, the first pressure-bearing section 11 , the third pressure-bearing section 15 , and the fifth pressure-bearing section 23 may be parallel to each other, which is beneficial to improving the overall aesthetics while ensuring the supporting performance of the box beam 100 .

[0074] In some examples, the second pressure-bearing section 13 , the fourth pressure-bearing section 21 , and the sixth pressure-bearing section 25 may be parallel to each other, which is beneficial to improving the overall aesthetics while ensuring the supporting performance of the box beam 100 .

[0075] In some embodiments, the second pressure-bearing section 13 includes a first sub-pressure-bearing section 131, a third auxiliary bending section 132 and a second sub-pressure-bearing section 133 connected in sequence, the second sub-pressure-bearing section 133 is connected to a side of the fourth pressure-bearing section 21 close to the sixth pressure-bearing section 25, and the first sub-pressure-bearing section 131 and the fourth pressure-bearing section 21 are located on the same plane.

[0076] Through the bending action of the third auxiliary bending section 132, the second sub-pressure section 133 and the first sub-pressure section 131 can be located in different planes. After the second sub-pressure section 133 and the fourth pressure section 21 are connected, the first sub-pressure section 131 and the fourth pressure section 21 can be located in the same plane.

[0077] Through the above arrangement, on the one hand, the fourth pressure-bearing section 21 can be made flush with the first sub-pressure-bearing section 131, thereby improving the overall aesthetics; on the other hand, the fourth pressure-bearing section 21 can provide greater downward pressure support to the second pressure-bearing section 13, thereby improving the supporting performance of the box beam 100.

[0078] For the first main body 10 in the above-mentioned box beam 100, it can be formed by bending a steel plate using a bending process to form the above-mentioned first pressure-bearing section 11, the first bending section 12, the second pressure-bearing section 13, the second bending section 14, the third pressure-bearing section 15, the first auxiliary bending section 16 and the first connecting section 17, that is, the first main body 10 is an integrated structure and can be manufactured through a bending process.

[0079] For example, the steel plate may be a high-strength steel plate such as 780DP.

[0080] Exemplarily, the thickness of the steel plate may be greater than or equal to 1 mm and less than or equal to 2 mm.

[0081] Similarly, for the second main body 20 in the above-mentioned box beam 100, it can be formed by bending another steel plate using a bending process to form the above-mentioned fourth pressure-bearing section 21, the third bending section 22, the fifth pressure-bearing section 23, the fourth bending section 24, the sixth pressure-bearing section 25, the second auxiliary bending section 26 and the second connecting section 27, that is, the second main body 20 is an integrated structure and can be manufactured through a bending process.

[0082] The material and thickness of the second body 20 may be set with reference to the material and thickness of the first body 10 , and will not be described in detail herein.

[0083] The box beam 100 can be quickly sampled and then quickly verified. If any deficiencies are found after verification, they can be quickly and flexibly optimized and then verified again. The production of the box beam 100 mainly involves bending technology and can adapt to various bending machines, which reduces the problem of modifying the mold, thereby effectively saving the cost of modifying or replacing the mold.

[0084] Some embodiments of the present disclosure also provide a battery pack case, such as Figure 6 As shown, the battery pack box 200 includes the box beam 100 as described in any of the above embodiments.

[0085] Since the battery pack box body 200 includes the above-mentioned box beam 100, it has all the technical effects possessed by the box beam 100, which will not be described in detail here.

[0086] In some embodiments, in the battery pack box 200, a plurality of box beams 100 are provided, and the plurality of box beams 100 are sequentially connected and enclosed to form an accommodating space N, which is used to accommodate battery cells.

[0087] Since multiple box beams 100 surround the accommodating space N, multiple box beams 100 can be used as the main support of the battery pack box 200, which has good supporting performance and ensures that the battery pack box 200 has high strength; in addition, the box beam 100 can also be quickly sampled and then quickly verified, and if deficiencies are found after verification, they can be quickly and flexibly optimized and then verified here. The production of the box beam 100 reduces the problems of modifying the mold, which can save the cost of the mold, which is highly adaptable to battery pack projects with small order quantities or that require rapid development in the early stage.

[0088] Exemplarily, four box beams 100 are provided, two of which are parallel to each other and used as cross beams 102, and the other two box beams 100 are parallel to each other and used as longitudinal beams 103, and both ends of the longitudinal beams 103 are respectively connected to the two cross beams 102, so that the four box beams 100 finally define a rectangular accommodating space N.

[0089] In some embodiments, the battery pack box 200 further includes a plurality of cross-arranged reinforcing ribs 104, and both ends of the reinforcing ribs are respectively connected to corresponding box beams 100. By providing the reinforcing ribs 104, the support strength of the battery pack box 200 can be further improved.

[0090] In some examples, two reinforcing ribs 104 may be provided, wherein one reinforcing rib 104 includes two sub-reinforcing ribs, and the two sub-reinforcing ribs are respectively connected to the two sides of the other reinforcing rib 104 and the two sub-reinforcing ribs are located on the same straight line. In this way, multiple reinforcing ribs 104 can be fixed.

[0091] In some examples, the stiffener 104 (or sub-stiffener) may be the box beam 100 described above.

[0092] Some embodiments of the present disclosure also provide a battery pack, such as Figure 7 As shown, the battery pack 300 includes the battery pack case 200 described in any of the above embodiments.

[0093] Since the battery pack box 200 has the box beam 100, and the battery pack 300 has the battery pack box 200, the battery pack 300 has all the technical effects possessed by the box beam 100, which will not be described in detail here.

[0094] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, 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 invention.

Claims

1. A box beam, characterized in that: include: First subject; The second body is separately provided from the first body, at least one of the cross sections of the first body and the second body is provided with an opening, and the first body and the second body are connected at both sides of the opening to close the opening.

2. The box beam according to claim 1, characterized in that: The first body comprises a first bending portion, a cross section of the first bending portion is provided with a first opening, the first body and the second body are connected at both sides of the first opening and close the first opening; and / or, The second body includes a second bending portion, a cross section of the second bending portion is provided with a second opening, and the first body and the second body are connected at both sides of the second opening to close the second opening.

3. The box beam according to claim 1, characterized in that: The first body and the second body together form an inner cavity, the third pressure-bearing section is located in the inner cavity and divides the inner cavity into two hollow chambers, and the third pressure-bearing section is arranged in one of the first body and the second body and connected to the other.

4. The box beam according to any one of claims 1 to 3, characterized in that: The first body comprises a first pressure-bearing section, a first bending section, a second pressure-bearing section, a second bending section and a third pressure-bearing section connected in sequence; the first pressure-bearing section and the third pressure-bearing section are arranged opposite to each other; the second body comprises a fourth pressure-bearing section, a third bending section, a fifth pressure-bearing section, a fourth bending section and a sixth pressure-bearing section connected in sequence; the fourth pressure-bearing section and the sixth pressure-bearing section are arranged opposite to each other; The fifth pressure-bearing section and the third pressure-bearing section are arranged opposite to each other, the fourth pressure-bearing section is connected to the second pressure-bearing section, and the third pressure-bearing section and the first pressure-bearing section are respectively connected to the sixth pressure-bearing section.

5. The box beam according to claim 4, characterized in that: The first main body further includes a first auxiliary bending section and a first connecting section located at one end of the third pressure-bearing section away from the second pressure-bearing section and connected in sequence, and the first connecting section is parallel to the sixth pressure-bearing section and connected to each other.

6. The box beam according to claim 5, characterized in that: The first connecting section is in contact with the sixth pressure-bearing section. The sixth pressure-bearing section is provided with a through hole, and the first connecting section closes the through hole.

7. The box beam according to claim 4, characterized in that: The second main body further includes a second auxiliary bending section and a second connecting section located at an end of the sixth pressure-bearing section away from the fifth pressure-bearing section and connected in sequence, and the second connecting section is parallel to the first pressure-bearing section and connected to each other.

8. The box beam according to claim 7, characterized in that: The second connecting section is located between the first pressure-bearing section and the third pressure-bearing section.

9. The box beam according to claim 4, characterized in that: The second pressure-bearing section includes a first sub-pressure-bearing section, a third auxiliary bending section and a second sub-pressure-bearing section connected in sequence, the second sub-pressure-bearing section is connected to a side of the fourth pressure-bearing section close to the sixth pressure-bearing section, and the first sub-pressure-bearing section and the fourth pressure-bearing section are located on the same plane.

10. A battery pack box, characterized in that: It comprises a box beam as described in any one of claims 1 to 9.

11. The battery pack case according to claim 10, characterized in that: The box beams are provided in plurality, and the plurality of box beams are sequentially connected and enclosed to form a containing space, and the containing space is used to contain the battery cells.

12. The battery pack case according to claim 11, characterized in that: It also includes a plurality of cross-arranged reinforcing ribs, and both ends of the reinforcing ribs are respectively connected to the corresponding box beams.

13. A battery pack, characterized in that: Comprising a battery pack case as described in any one of claims 10-12.

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