Battery box body and battery pack

Abstract

The utility model discloses a battery box body and a battery pack, the battery box body comprises: two boundary beams, the two boundary beams are respectively arranged at two ends of a first direction, and the two boundary beams extend along a second direction; the two first cross beams are arranged at the two ends in the second direction respectively, each first cross beam extends in the first direction, the two ends, in the first direction, of each first cross beam are connected with the two edge beams respectively, and the surfaces of one end or the two ends, in the first direction, of each first cross beam protrude in the third direction; and a mounting cavity is formed between the two edge beams and the two first cross beams. According to the battery box disclosed by the utility model, the area of the cross section of one end or two ends of the first cross beam along the first direction is increased, so that the connection reliability between the first cross beam and the edge beam is improved, the structural strength of the battery box is improved, and meanwhile, the size of the cross section of the whole first cross beam vertical to the first direction does not need to be increased; and the light weight of the battery box body is facilitated.

Description

Technical Field

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

[0002] In order to improve the battery pack's ability to cope with various working conditions, the structural strength of the battery pack must be improved, and the design of the battery pack structure directly affects the overall safety performance of the battery pack. As the energy density of the battery pack continues to increase, a highly integrated battery pack structure is particularly important. At present, due to the overly regular cross-sectional design of the battery case, it is often necessary to increase the overall cross-sectional area of ​​the battery case to ensure the structural strength of the battery case, which will reduce the lightness of the battery case. When designing the battery case to be more lightweight, it is necessary to reduce the overall cross-sectional area of ​​the battery case, which often reduces the structural strength of the battery case. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a battery box, which not only improves the structural strength of the battery box, but also helps to lighten the battery box.

[0004] The utility model also provides a battery pack, comprising the above-mentioned battery box.

[0005] According to the battery box embodiment of the utility model, it includes: two side beams, the two side beams are respectively arranged at the two ends of the first direction, and the two side beams extend along the second direction; two first cross beams, the two first cross beams are respectively arranged at the two ends of the second direction, each of the first cross beams extends along the first direction, and the two ends of each first cross beam along the first direction are respectively connected to the two side beams, the surface of one end or both ends of each first cross beam along the first direction protrudes along the third direction, and an installation cavity is formed between the two side beams and the two first cross beams, and the first direction, the second direction and the third direction are perpendicular to each other.

[0006] According to the battery case of the embodiment of the utility model, two side beams are respectively arranged at the two ends of the first direction, and two first cross beams are respectively arranged at the two ends of the second direction, and the two ends of each first cross beam along the first direction are respectively connected to the two side beams, and the surface of one end or both ends of the first cross beam along the first direction is raised along the third direction, thereby changing the shape of the cross section of one end or both ends of the first cross beam along the first direction, thereby increasing the cross section area of ​​one end or both ends of the first cross beam along the first direction, thereby increasing the connection reliability between the first cross beam and the side beam, thereby improving the structural strength of the battery case, and at the same time, there is no need to increase the cross-sectional size of the entire first cross beam perpendicular to the first direction, which is beneficial to the lightweight of the battery case.

[0007] In some embodiments of the utility model, the battery box also includes: at least one second cross beam, the second cross beam extends along the first direction, the two ends of the second cross beam along the first direction are respectively connected to the two side beams, the second cross beam is arranged on the side of one or two of the first cross beams along the second direction away from the installation cavity, and the surface of one end or both ends of the second cross beam along the first direction protrudes along the third direction.

[0008] In some embodiments of the present invention, the battery box further includes: a connecting rib extending along the second direction, and two ends of the connecting rib along the second direction are respectively connected to the first crossbeam and the second crossbeam.

[0009] In some embodiments of the utility model, the battery box also includes: a mounting beam, there are two mounting beams, each of the mounting beams extends along the second direction, and along the first direction, the two mounting beams are respectively connected to one end of the two side beams away from the installation cavity.

[0010] In some embodiments of the present invention, each of the side beams has a first cavity, the first cavity penetrates the side beam along the second direction, the first cavity has at least one first reinforcing rib, at least one first reinforcing rib divides the first cavity into a plurality of first sub-cavities arranged along the third direction, and each of the first sub-cavities penetrates the side beam along the second direction.

[0011] In some embodiments of the utility model, each of the mounting beams has a second cavity, the second cavity passes through the mounting beam along the second direction, the second cavity has at least one second reinforcing rib, at least one second reinforcing rib divides the second cavity into a plurality of second sub-cavities arranged along the first direction, and each of the second sub-cavities passes through the mounting beam along the second direction.

[0012] In some embodiments of the present invention, the widths of the plurality of second sub-cavities along the first direction are different.

[0013] In some embodiments of the utility model, the third direction is an up-down direction, and along the first direction, the highest point of the upper surface of the mounting beam corresponding to the second sub-cavity closest to the side beam on the same side is flush with the bottom first reinforcement rib in the third direction; and / or, the surface of the mounting beam at one or both ends along the third direction corresponding to the second sub-cavity closest to the side beam on the same side along the first direction protrudes away from the second sub-cavity; and / or, the surface of one end of the side beam along the third direction is recessed toward the first cavity.

[0014] In some embodiments of the utility model, the battery case is a steel part; and / or, the battery case further includes: a middle beam, the middle beam extends along the second direction, the middle beam is located between the two side beams and between the two first beams, and the two ends of the middle beam along the second direction are respectively connected to the two first beams; and / or, the battery case further includes: a reinforcing beam, the reinforcing beam extends along the first direction, and at least one of the first beams has the reinforcing beam at one end along the third direction.

[0015] A battery pack according to an embodiment of the utility model includes the above-mentioned battery box.

[0016] According to the battery pack of the embodiment of the utility model, by setting the above-mentioned battery case, two side beams are respectively arranged at the two ends of the first direction, and two first cross beams are respectively arranged at the two ends of the second direction, and the two ends of each first cross beam along the first direction are respectively connected to the two side beams, and the surface of one end or both ends of the first cross beam along the first direction is raised along the third direction, thereby changing the shape of the cross section of one end or both ends of the first cross beam along the first direction, thereby increasing the cross section area of ​​one end or both ends of the first cross beam along the first direction, thereby increasing the connection reliability between the first cross beam and the side beam, thereby improving the structural strength of the battery case, and at the same time, there is no need to increase the cross-sectional size of the entire first cross beam perpendicular to the first direction, which is beneficial to the lightweight of the battery case.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is an exploded view of a battery pack according to an embodiment of the utility model;

[0020] Figure 2 is a three-dimensional diagram of a battery box according to an embodiment of the utility model;

[0021] Figure 3 is a top view of a battery box according to an embodiment of the utility model;

[0022] Figure 4 yes Figure 3 Sectional view at AA in the middle;

[0023] Figure 5 yes Figure 3 A cross-sectional view at BB, wherein the reinforcing cross beam is not shown;

[0024] Figure 6 yes Figure 3 Sectional view at CC;

[0025] Figure 7 yes Figure 3 A cross-sectional view at DD in the middle, wherein the reinforcing cross beam is not shown;

[0026] Figure 8 yes Figure 2 Enlarged view of point E in the middle.

[0027] Reference numerals:

[0028] 100. Battery pack;

[0029] 10. Battery box;

[0030] 1. side beam; 11. first cavity; 111. first reinforcing rib; 112. first sub-cavity;

[0031] 2. mounting beam; 22. second cavity; 221. second reinforcing rib; 222. second sub-cavity;

[0032] 3. The first beam;

[0033] 4. Second crossbeam;

[0034] 5. Connecting ribs;

[0035] 6. Middle beam;

[0036] 7. Strengthen the crossbeam;

[0037] 8. Installation cavity;

[0038] 20. Cover plate; 30. Press plate; 40. Battery module; 50. Liquid cooling plate; 60. Bottom guard plate; 70. Adhesive block. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Reference below Figure 2-Figure 8 A battery box 10 according to an embodiment of the present invention is described.

[0043] like Figure 2-Figure 8 As shown, the battery box 10 according to the embodiment of the utility model includes: two side beams 1 and two first cross beams 3.

[0044] Specifically, refer to Figure 2 and Figure 3 , the two side beams 1 are respectively arranged in the first direction (such as Figure 2 m direction) at both ends, the two side beams 1 are along the second direction (as shown Figure 2 The two first cross beams 3 are respectively arranged at the two ends of the second direction, each first cross beam 3 extends along the first direction, and the two ends of each first cross beam 3 along the first direction are respectively connected to the two side beams 1, and a mounting cavity 8 is formed between the two side beams 1 and the two first cross beams 3.

[0045] It should be noted that the battery module 40 is arranged in the installation cavity 8. Through the arrangement of the two side beams 1 and the two first cross beams 3, the two side beams 1 and the two first cross beams 3 surround the battery module 40 in the circumferential direction of the battery module 40, so that the two side beams 1 and the two first cross beams 3 protect the battery module 40 in the circumferential direction of the battery module 40, thereby improving the protection of the battery module 40.

[0046] When the two side beams 1 are subjected to a force in the first direction, the force in the first direction can be transmitted to the first cross beam 3 through the connection between the side beam 1 and the first cross beam 3. Since the first cross beam 3 extends in the first direction, the first cross beam 3 can better withstand the force in the first direction. When the two first cross beams 3 are subjected to a force in the second direction, the force in the second direction can be transmitted to the side beam 1 through the connection between the side beam 1 and the first cross beam 3. Since the side beam 1 extends in the second direction, the side beam 1 can better withstand the force in the second direction. Therefore, through the joint load-bearing of the first cross beam 3 and the side beam 1, the forces from the first direction and the second direction can be better withstand, thereby improving the protection effect of the battery box 10 on the battery module 40.

[0047] Furthermore, if Figure 2-Figure 8 As shown, the surface of one or both ends of each first beam 3 along the first direction is along the third direction (such as Figure 2 The first direction, the second direction and the third direction are perpendicular to each other.

[0048] It can be understood that the surface of one or both ends of the first beam 3 along the first direction is convex along the third direction, thereby increasing the area of ​​the cross-section of the first beam 3 at one or both ends along the first direction by changing the shape of the cross-section of the first beam 3 at one or both ends along the first direction. At the same time, since the two ends of the first beam 3 along the first direction are respectively connected to the two side beams 1, the area of ​​the connection between the first beam 3 and the side beam 1 is increased, thereby increasing the connection reliability between the first beam 3 and the side beam 1, thereby increasing the force transmission reliability and stability between the first beam 3 and the side beam 1, thereby improving the structural strength of the battery box 10.

[0049] In addition, since the cross-sectional area of ​​one or both ends of the first beam 3 along the first direction increases, that is, the cross-sectional area of ​​a partial region of the first beam 3 perpendicular to the first direction increases, compared with increasing the cross-sectional area of ​​the entire first beam 3 perpendicular to the first direction, the weight and volume of the first beam 3 are small, which is beneficial to the lightweighting of the battery box 10.

[0050] For example, Figure 2-Figure 8In the example shown, the surface of one end of each first beam 3 along the first direction is convex along the third direction, but the present invention is not limited thereto, and the surfaces of both ends of each first beam 3 along the first direction may be convex along the third direction.

[0051] Furthermore, if Figure 2-Figure 8 As shown, in the cross section of the first beam 3 perpendicular to the second direction, the outer contour of the connection between the convex part at one end or both ends of the first beam 3 along the first direction and the other parts of the first beam 3 is an arc. Thus, the stress caused by the shear force of the sharp edge can be reduced, and the damage caused by excessive concentration of stress can be prevented. At the same time, the force transmission can be made more uniform, thereby improving the reliability of the force transmission.

[0052] According to the battery case 10 of the utility model embodiment, two side beams 1 are respectively arranged at the two ends of the first direction, and two first cross beams 3 are respectively arranged at the two ends of the second direction, and the two ends of each first cross beam 3 along the first direction are respectively connected to the two side beams 1, and the surface of one end or both ends of the first cross beam 3 along the first direction is convex along the third direction, thereby changing the shape of the cross section of one end or both ends of the first cross beam 3 along the first direction, thereby increasing the cross section area of ​​one end or both ends of the first cross beam 3 along the first direction, thereby increasing the connection reliability between the first cross beam 3 and the side beam 1, thereby improving the structural strength of the battery case 10, and at the same time, there is no need to increase the cross-sectional size of the entire first cross beam 3 perpendicular to the first direction, which is beneficial to the lightweight of the battery case 10.

[0053] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, the battery box 10 also includes: at least one second beam 4, the second beam 4 extends along the first direction, the two ends of the second beam 4 along the first direction are respectively connected to the two side beams 1, and the second beam 4 is arranged on the side of one or two first beams 3 away from the installation cavity 8 along the second direction.

[0054] It can be understood that, through the provision of the second cross beam 4, the two first cross beams 3, at least one second cross beam 4 and the two side beams 1 can bear force together, thereby further improving the structural strength of the battery box 10, thereby further increasing the reliability of the battery box 10 bearing force, thereby further improving the protection reliability of the battery module 40, thereby improving the collision performance of the battery pack 100.

[0055] For example, Figure 2 and Figure 3In the example shown, there is one second crossbeam 4, but the present invention is not limited thereto, and the second crossbeam 4 may be more, such as 2, 3, 4 or 5. When there are multiple second crossbeams 4, part of them may be located on the side of one of the first crossbeams 3 away from the installation cavity 8 along the second direction, and the other part may be located on the side of another first crossbeam 3 away from the installation cavity 8 along the second direction; or all the second crossbeams 4 may be located on the side of one of the first crossbeams 3 away from the installation cavity 8 along the second direction.

[0056] Furthermore, if Figure 2 and Figure 3 As shown, the surface of one or both ends of the second crossbeam 4 along the first direction is raised along the third direction. It can be understood that the surface of one or both ends of the second crossbeam 4 along the first direction is raised along the third direction, thereby increasing the area of ​​the cross section of one or both ends of the second crossbeam 4 along the first direction by changing the shape of the cross section of one or both ends of the second crossbeam 4 along the first direction. At the same time, since the two ends of the second crossbeam 4 along the first direction are respectively connected to the two side beams 1, the area of ​​the connection between the second crossbeam 4 and the side beam 1 is increased, thereby increasing the connection reliability between the second crossbeam 4 and the side beam 1, thereby increasing the force transmission reliability and stability between the second crossbeam 4 and the side beam 1, thereby improving the structural strength of the battery box 10.

[0057] In addition, since the cross-sectional area of ​​one or both ends of the second beam 4 along the first direction increases, that is, the cross-sectional area of ​​a partial region of the second beam 4 perpendicular to the first direction increases, compared with increasing the size of the cross-sectional area of ​​the entire second beam perpendicular to the first direction, the weight and volume of the second beam 4 are small, which is beneficial to the lightweighting of the battery box 10.

[0058] For example, Figure 2-Figure 8 In the example shown, the surface of one end of each second beam 4 along the first direction is convex along the third direction, but the present invention is not limited thereto, and the surfaces of both ends of each second beam 4 along the first direction may be convex along the third direction.

[0059] Furthermore, if Figure 2-Figure 8 As shown, in the cross section of the second beam 4 perpendicular to the second direction, the outer contour of the connection between the convex part at one or both ends of the second beam 4 along the first direction and the other parts of the second beam 4 is an arc. Thus, the stress generated by the shear force of the sharp edge can be reduced, and the damage caused by excessive stress concentration can be prevented. At the same time, the force transmission can be made more uniform, thereby improving the reliability of the force transmission.

[0060] In some embodiments of the present invention, Figure 2 and Figure 3As shown, the battery box 10 further includes: a connecting rib 5, the connecting rib 5 extends along the second direction, and the two ends of the connecting rib 5 along the second direction are respectively connected to the first cross beam 3 and the second cross beam 4. As a result, the first cross beam 3 and the second cross beam 4 can be better stressed, and the integrity of the battery box 10 is also improved, thereby further improving the structural strength of the battery box 10, thereby further increasing the reliability of the stress on the battery box 10, thereby further improving the protection reliability of the battery module 40, and thus improving the collision performance of the battery pack 100.

[0061] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, the battery box 10 further includes: a mounting beam 2, two mounting beams 2, each mounting beam 2 extends along the second direction, and along the first direction, the two mounting beams 2 are respectively connected to the ends of the two side beams 1 away from the mounting cavity 8. It can be understood that one end of the mounting beam 2 along the first direction is connected to the side beam 1, and the other end is connected to the electrical equipment, such as a vehicle, so that the battery pack 100 can be fixed relative to the electrical equipment, so that the battery pack 100 can better supply power.

[0062] In some embodiments of the present invention, Figure 4-Figure 8 As shown, each side beam 1 has a first cavity 11, and the first cavity 11 penetrates the side beam 1 along the second direction. The first cavity 11 has at least one first reinforcing rib 111, and the at least one first reinforcing rib 111 divides the first cavity 11 into a plurality of first sub-cavities 112 arranged along the third direction, and each first sub-cavity 112 penetrates the side beam 1 along the second direction.

[0063] It can be understood that the provision of multiple first sub-cavities 112 increases the energy absorption effect of the side beam 1, thereby improving the collision performance, thereby better protecting the battery module 40, and the provision of at least one first reinforcement rib 111 in the first cavity 11 can further improve the structural strength of the side beam 1, thereby improving the structural strength of the battery box 10, thereby better protecting the battery module 40.

[0064] For example, Figure 8 In the example shown, there is one first reinforcing rib 111 and two first sub-cavities 112, but the present invention is not limited thereto. The first reinforcing rib 111 may be other numbers, and the first sub-cavities 112 may also be other numbers. For example, the first reinforcing rib 111 may be 4, 2, 5 or 6, etc., and the first sub-cavities 112 may be 5, 3, 6 or 7, etc. It should be noted that the number of the first sub-cavities 112 is the number of the first reinforcing rib 111 plus one.

[0065] In some embodiments of the present invention, Figure 2 , Figure 5 , Figure 6 and Figure 8 As shown, each mounting beam 2 has a second cavity 22, and the second cavity 22 penetrates the mounting beam 2 along the second direction. The second cavity 22 has at least one second reinforcing rib 221, and the at least one second reinforcing rib 221 divides the second cavity 22 into a plurality of second sub-cavities 222 arranged along the first direction, and each second sub-cavity 222 penetrates the mounting beam 2 along the second direction.

[0066] It can be understood that the provision of multiple second sub-cavities 222 increases the energy absorption effect of the mounting beam 2, thereby improving the collision performance, so that the battery module 40 can be better protected, and the provision of at least one second reinforcing rib 221 in the second cavity 22 can further improve the structural strength of the mounting beam 2, thereby improving the structural strength of the battery box 10, so that the battery module 40 can be better protected.

[0067] For example, Figure 8 In the example shown, there is one second reinforcing rib 221 and two second sub-cavities 222, but the present invention is not limited thereto. The second reinforcing rib 221 may be other numbers, and the second sub-cavities 222 may also be other numbers. For example, the second reinforcing rib 221 may be 4, 2, 5 or 6, etc., and the second sub-cavities 222 may be 5, 3, 6 or 7, etc. It should be noted that the number of the second sub-cavities 222 is the number of the second reinforcing rib 221 plus one.

[0068] In some embodiments of the present invention, Figure 4-Figure 8 As shown, the widths of the plurality of second sub-cavities 222 along the first direction are different. Thus, different structural requirements can be met and the energy absorption deformation of the mounting beam 2 can be optimized. Figure 5 , Figure 6 and Figure 8 In the example shown, there are two second sub-cavities 222, and the width of the second sub-cavity 222 away from the side beam 1 along the first direction is greater than the width of the second sub-cavity 222 close to the side beam 1 along the first direction. Thus, the mounting beam 2 at the second sub-cavity 222 away from the side beam 1 absorbs energy through greater deformation, thereby reducing the deformation of the mounting beam 2 at the second sub-cavity 222 close to the side beam 1, thereby reducing the impact on the side beam 1, thereby reducing the deformation of the side beam 1, thereby further improving the protection reliability of the battery module 40, and thereby improving the collision performance of the battery pack 100.

[0069] However, the present invention is not limited thereto, and the width of the second sub-cavity 222 close to the side beam 1 along the first direction may be greater than the width of the second sub-cavity 222 away from the side beam 1 along the first direction.

[0070] In some embodiments of the present invention, Figure 4-Figure 8 As shown, the third direction is the up and down direction. Along the first direction, the highest point of the upper surface of the mounting beam 2 corresponding to the second sub-cavity 222 closest to the side beam 1 on the same side is flush with the first reinforcing rib 111 at the bottom in the third direction; thereby, the mounting beam 2 and the side beam 1 are better stressed, and the upper surface of the mounting beam 2 can be prevented from invading the first cavity 11, thereby improving the protection of the battery module 40.

[0071] In some embodiments of the present invention, Figure 4-Figure 8 As shown, the surface of the mounting beam 2 at one or both ends along the third direction corresponding to the second sub-cavity 222 closest to the same-side edge beam 1 along the first direction protrudes away from the second sub-cavity 222; thereby, the stress generated by the shear force of the sharp-angle edge can be reduced, and the surface of the mounting beam 2 can be prevented from being damaged due to excessive stress concentration. At the same time, the force transmission can be made more uniform, thereby improving the reliability of the force transmission, thereby further improving the protection reliability of the battery module 40, and thus improving the collision performance of the battery pack 100.

[0072] For example, Figure 5 , Figure 6 and Figure 8 In the example shown, the third direction is the up-down direction, there are two second sub-cavities 222 , and among the two second sub-cavities 222 , the upper surface of the mounting beam 2 corresponding to the second sub-cavity 222 close to the side beam 1 protrudes away from the second sub-cavity 222 .

[0073] In some embodiments of the present invention, one end surface of the side beam 1 along the third direction is concave toward the first cavity 11 (not shown in the figure). Thus, the sealing effect between the battery box 10 and other structures of the battery pack 100 is enhanced, and the deformation energy absorption function is also improved, thereby further improving the protection reliability of the battery module 40, thereby improving the collision performance of the battery pack 100. For example, in the present invention, when the third direction is the up-down direction, the upper surface of the side beam 1 is concave toward the first cavity 11.

[0074] In some embodiments of the utility model, the battery case 10 is a steel part. It can be understood that steel parts have greater rigidity and higher structural strength than aluminum parts. Therefore, the battery case 10 is a steel part, so that the battery case 10 has good rigidity and structural strength, thereby better improving the collision performance, thereby better protecting the battery module 40, and thus improving safety.

[0075] In some embodiments of the present invention, Figure 2 and Figure 3As shown, the battery box 10 also includes: a middle beam 6, which extends along the second direction, is located between the two side beams 1 and between the two first cross beams 3, and the two ends of the middle beam 6 along the second direction are respectively connected to the two first cross beams 3.

[0076] Thereby, the integrity between the two first cross beams 3 is improved, so that the two first cross beams 3 can bear force better, thereby further improving the structural strength of the battery box 10, thereby further increasing the reliability of the battery box 10 in bearing force, thereby further improving the reliability of protecting the battery module 40, thereby improving the collision performance of the battery pack 100.

[0077] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, the battery box 10 further includes: a reinforcing beam 7 extending along the first direction, and at least one first beam 3 has a reinforcing beam 7 at one end along the third direction.

[0078] Therefore, by providing the reinforcing cross beam 7, the overall strength of the battery box 10 is improved, and the reliability of the force of the battery box 10 is further increased, thereby further improving the protection reliability of the battery module 40, thereby improving the collision performance of the battery pack 100.

[0079] In addition, since at least one end of the first beam 3 along the third direction has a reinforcing beam 7 , the reliability of the battery box 10 in receiving force in the third direction is also improved, thereby further improving the structural strength of the battery box 10 .

[0080] Preferably, each first beam 3 has a plurality of groups of reinforcing beams 7 at one end along the third direction, and the plurality of groups of reinforcing beams 7 are spaced apart along the first direction, and each group of reinforcing beams 7 includes a plurality of reinforcing beams 7 arranged along the third direction, thereby further improving the structural strength of the battery box 10, further increasing the reliability of the force applied to the battery box 10, thereby further improving the reliability of protecting the battery module 40, and thereby improving the collision performance of the battery pack 100.

[0081] For example, Figure 2 and Figure 3 In the example shown, one end of each first cross beam 3 along the third direction has two groups of reinforcing cross beams 7, the two groups of reinforcing cross beams 7 are arranged at intervals along the first direction, and each group of reinforcing cross beams 7 includes two reinforcing cross beams 7 arranged along the third direction. However, the utility model is not limited thereto, and one end of each first cross beam 3 along the third direction may also have more groups of reinforcing cross beams 7, such as 3, 4, 5 or 6 groups, and each group of reinforcing cross beams 7 may also include more reinforcing cross beams 7, such as 3, 4, 5 or 6, etc.

[0082] Please refer to the following Figure 1 A battery pack 100 according to an embodiment of the present invention is described.

[0083] like Figure 1 As shown, the battery pack 100 according to the embodiment of the present invention includes the above-mentioned battery box 10.

[0084] Furthermore, if Figure 1 As shown, the battery pack 100 further includes a cover plate 20, a battery module 40 and a bottom guard plate 60. The cover plate 20 is disposed on one end of the battery case 10 along the third direction and is connected to the battery case 10, the bottom guard plate 60 is disposed on one end of the battery case 10 away from the cover plate 20 and is connected to the battery case 10, and the battery module 40 is disposed in a space formed between the upper cover, the bottom guard plate 60 and the battery case 10, so that the upper cover, the bottom guard plate 60 and the battery case 10 can protect the battery module 40.

[0085] Furthermore, if Figure 1 As shown, the battery pack 100 also includes a liquid cooling plate 50, which is located between the bottom guard plate 60 and the battery case 10, and is stacked with the bottom guard plate 60. The two ends of the liquid cooling plate 50 along the third direction are respectively connected to the bottom guard plate 60 and the battery case 10. Since the two ends of the mounting cavity 8 along the third direction are open, the end of the battery module 40 facing away from the cover plate 20 can be bonded to the liquid cooling plate 50 by an adhesive, thereby facilitating the heat dissipation of the battery module 40 and also serving to fix the battery module 40.

[0086] Furthermore, if Figure 1 As shown, the end of the battery module 40 facing away from the liquid cooling plate 50 has a pressing plate 30, and the end of the pressing plate 30 facing away from the battery module 40 is connected to an adhesive block 70, and the end of the adhesive block 70 facing away from the pressing plate 30 is connected to the upper cover, thereby, the cover plate 20 and the pressing plate 30 are connected through the adhesive block 70 to improve the overall rigidity of the battery pack 100, and when the battery pack 100 is impacted, it can better withstand the impact force in the third direction on the battery module 40, thereby improving the protection of the battery module 40. The pressing plate 30 can avoid stress concentration on a certain area of ​​the battery module 40, thereby further protecting the battery module 40.

[0087] According to the battery pack 100 of the utility model embodiment, by setting the above-mentioned battery case 10, the two side beams 1 are respectively arranged at the two ends of the first direction, and the two first cross beams 3 are respectively arranged at the two ends of the second direction, and the two ends of each first cross beam 3 along the first direction are respectively connected to the two side beams 1, and the surface of one end or both ends of the first cross beam 3 along the first direction is convex along the third direction, thereby changing the shape of the cross section of one end or both ends of the first cross beam 3 along the first direction, thereby increasing the cross-sectional area of ​​one end or both ends of the first cross beam 3 along the first direction, thereby increasing the connection reliability between the first cross beam 3 and the side beam 1, thereby improving the structural strength of the battery case 10, and at the same time, there is no need to increase the cross-sectional size of the entire first cross beam 3 perpendicular to the first direction, which is beneficial to the lightweight of the battery case 10.

[0088] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0089] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery box, characterized in that: include: Two side beams, the two side beams are respectively arranged at two ends of the first direction, and the two side beams extend along the second direction; Two first cross beams, the two first cross beams are respectively arranged at the two ends of the second direction, each of the first cross beams extends along the first direction, and the two ends of each first cross beam along the first direction are respectively connected to the two side beams, the surface of one end or both ends of each first cross beam along the first direction protrudes along the third direction, and an installation cavity is formed between the two side beams and the two first cross beams, and the first direction, the second direction and the third direction are perpendicular to each other.

2. The battery box according to claim 1, characterized in that: Also includes: At least one second cross beam, the second cross beam extends along the first direction, the two ends of the second cross beam along the first direction are respectively connected to the two side beams, the second cross beam is arranged on the side of one or two of the first cross beams away from the installation cavity along the second direction, and the surface of one end or both ends of the second cross beam along the first direction protrudes along the third direction.

3. The battery box according to claim 2, characterized in that: The battery box further includes: a connecting rib extending along the second direction, wherein two ends of the connecting rib along the second direction are respectively connected to the first crossbeam and the second crossbeam.

4. The battery box according to claim 1, characterized in that: Also includes: Mounting beam, There are two mounting beams, each of which extends along the second direction. Along the first direction, the two mounting beams are respectively connected to one end of the two side beams away from the installation cavity.

5. The battery box according to claim 4, characterized in that: Each of the side beams has a first cavity, the first cavity penetrates the side beam along the second direction, the first cavity has at least one first reinforcing rib, at least one first reinforcing rib divides the first cavity into a plurality of first sub-cavities arranged along the third direction, and each of the first sub-cavities penetrates the side beam along the second direction.

6. The battery case according to claim 5, characterized in that: Each of the mounting beams has a second cavity therein, the second cavity penetrates the mounting beam along the second direction, the second cavity has at least one second reinforcing rib, the at least one second reinforcing rib divides the second cavity into a plurality of second sub-cavities arranged along the first direction, and each of the second sub-cavities penetrates the mounting beam along the second direction.

7. The battery case according to claim 6, characterized in that: The widths of the plurality of second sub-cavities along the first direction are different.

8. The battery box according to claim 6, characterized in that: The third direction is the up-down direction, and along the first direction, the highest point of the upper surface of the mounting beam corresponding to the second sub-cavity closest to the side beam on the same side is flush with the bottommost first reinforcing rib in the third direction; and / or, the surface of the mounting beam at one or both ends along the third direction corresponding to the second sub-cavity closest to the side beam on the same side along the first direction protrudes away from the second sub-cavity; And / or, one end surface of the side beam along the third direction is recessed toward the first cavity.

9. The battery box according to claim 1, characterized in that: The battery box is made of steel; And / or, the battery box further comprises: a middle beam, the middle beam extending along the second direction, the middle beam being located between the two side beams and between the two first cross beams, and the two ends of the middle beam along the second direction being connected to the two first cross beams respectively; And / or, the battery box further includes: a reinforcing beam, the reinforcing beam extending along the first direction, and at least one of the first beams has the reinforcing beam at one end along the third direction.

10. A battery pack, characterized in that: Comprising a battery case according to any one of claims 1-9.

Images