Battery pack shell frame structure

Abstract

The utility model relates to the technical field of battery fixing devices, in particular to a battery pack shell frame structure which comprises a first edge beam and a second edge beam, one end of the first edge beam is fixed with one end of the second edge beam in a glue joint mode, and the extending direction of the first edge beam is different from that of the second edge beam. The first connecting part comprises a first fixing plate and a second fixing plate which are connected with each other, the first connecting part is mounted on the inner side of a corner area at the joint of the first edge beam and the second edge beam, the first fixing plate is fixed with the first edge beam, and the second fixing plate is fixed with the second edge beam; the second connecting part comprises a third fixing plate and a fourth fixing plate which are connected, the second connecting part is installed on the outer side of the corner area, the third fixing plate is fixed to the first edge beam, and the fourth fixing plate is fixed to the second edge beam. The utility model is at least beneficial to solving the problem of deformation of the battery pack shell frame caused by welding.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery fixing devices, and in particular relates to a battery pack shell frame structure. Background Art

[0002] Due to the need for cost control, some models of new energy vehicles will consider using high-strength steel to manufacture the battery pack shell by roll pressing. Specifically, the main frame of the battery pack shell is spliced ​​with roll-formed roll beams, and the roll beams are usually connected by arc welding.

[0003] Roller beams are usually made of metal materials such as steel. Therefore, roller beams have certain thermal conductivity characteristics. During the welding process, the length of the weld at the connection between the two roller beams is approximately in the range of 200mm to 240mm. Therefore, the welding process will generate a lot of heat. If no measures are taken, the main frame will produce a large deformation after welding. In related technologies, welding fixtures are used during the welding process to fix the roller beams with welding fixtures to avoid deformation of the main frame. However, even with the use of welding fixtures, there will still be some deformation, and the clamping position of the welding fixture needs to be adjusted during welding. The early debugging of welding will also consume a lot of time and manpower. Utility Model Content

[0004] In view of this, the present invention aims to provide a battery pack shell frame structure, which is at least helpful in solving the problem of battery pack shell frame deformation caused by welding.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0006] The utility model provides a battery pack shell frame structure, including: a first side beam and a second side beam, one end of the first side beam is glued and fixed to one end of the second side beam, and the extension direction of the first side beam is different from the extension direction of the second side beam; a first connecting part, the first connecting part includes a first fixing plate and a second fixing plate connected to each other, the first connecting part is installed on the inner side of a corner area formed by the connection between the first side beam and the second side beam, the first fixing plate is fixed to the first side beam, and the second fixing plate is fixed to the second side beam; a second connecting part, the second connecting part includes a third fixing plate and a fourth fixing plate connected to each other, the second connecting part is installed on the outer side of the corner area, the third fixing plate is fixed to the first side beam, and the fourth fixing plate is fixed to the second side beam.

[0007] Furthermore, the first side beam has a first outer side surface and a first inner side surface relative to each other, and the outer side surface of the first fixing plate contacts the first inner side surface of the first side beam; the second side beam has a second outer side surface and a second inner side surface relative to each other, and the outer side surface of the second fixing plate contacts the second inner side surface of the second side beam.

[0008] Furthermore, the inner side surface of the third fixing plate contacts the first outer side surface of the first side beam, and the inner side surface of the fourth fixing plate contacts the second outer side surface of the second side beam.

[0009] Furthermore, the first side beam has a first cavity, the first side beam includes a first inner plate and a first outer plate that are opposite to each other and surround the first cavity, and the first fixed plate is fixed to the first inner plate by at least one blind rivet; the second side beam has a second cavity, the second side beam includes a second inner plate and a second outer plate that are opposite to each other and surround the second cavity, and the second fixed plate is fixed to the second inner plate by at least one blind rivet.

[0010] Furthermore, the third fixing plate is fixed to the first outer plate by at least one blind rivet, and the fourth fixing plate is fixed to the second outer plate by at least one blind rivet.

[0011] Furthermore, the first mold cavity includes a first sub-mold cavity and a second sub-mold cavity, the first side beam includes a first reinforcing plate, the first reinforcing plate separates the first sub-mold cavity and the second sub-mold cavity, and the two opposite edges of the first reinforcing plate are respectively connected to the first outer plate and the first inner plate.

[0012] Furthermore, the second cavity includes a third sub-cavity and a fourth sub-cavity, the second side beam includes a second reinforcing plate, the second reinforcing plate separates the third sub-cavity and the fourth sub-cavity, and the two opposite edges of the second reinforcing plate are respectively connected to the second outer plate and the second inner plate.

[0013] Furthermore, the extension direction of the first side beam is perpendicular to the extension direction of the second side beam, the first connecting portion is L-shaped, and the second connecting portion is L-shaped.

[0014] Furthermore, the first fixing plate and the second fixing plate are integrally formed, and the third fixing plate and the fourth fixing plate are integrally formed.

[0015] Compared with the prior art, the present invention can achieve the following beneficial effects: in order to eliminate the influence of welding thermal deformation on the battery pack shell frame, the present invention adopts a cold connection method, specifically, the first side beam and the second side beam are preliminarily fixed by gluing, and for the corner area formed by the connection between the first side beam and the second side beam, a first connecting part is installed on the inner side of the corner area, wherein the first fixing plate of the first connecting part is fixed to the first side beam, and the second fixing plate of the first connecting part is fixed to the second side beam, and the first fixing plate and the second fixing plate are connected to each other, so that the first side beam and the second side beam can be connected through the first connecting part, and in order to further improve the connection stability, the second connecting part is used to fix the first side beam and the second side beam on the outside of the corner area, and the connection is reinforced from the inside and outside. In this way, a stable connection between the first side beam and the second side beam can be achieved without using welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 This is a structural schematic diagram of the first side beam and the second side beam bonded together in the battery pack housing frame structure according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic structural diagram of the connection between the first connecting portion, the first side beam, and the second side beam in the battery pack housing frame structure according to an embodiment of the present utility model;

[0019] Figure 3 This is a schematic structural diagram of the connection between the second connecting portion, the first side beam and the second side beam in the battery pack shell frame structure described in an embodiment of the present utility model.

[0020] Explanation of the accompanying drawings: 10, first side beam; 20, second side beam; 30, first connecting portion; 31, first fixed plate; 32, second fixed plate; 40, second connecting portion; 41, third fixed plate; 42, fourth fixed plate; 107, first outer side surface; 101, first inner side surface; 207, second outer side surface; 201, second inner side surface; 100, first cavity; 110, first sub-cavity; 120, second sub-cavity; 104, first reinforcing plate; 105, first top plate; 106, first bottom plate; 102, first inner plate; 103, first outer plate; 50, blind rivet; 200, second cavity; 210, third sub-cavity; 220, fourth sub-cavity; 204, second reinforcing plate; 205, second top plate; 206, second bottom plate; 202, second inner plate; 203, second outer plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation of the present invention.

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0026] refer to Figures 1 to 3 The present invention provides a battery pack shell frame structure, including: a first side beam 10 and a second side beam 20, one end of the first side beam 10 is glued and fixed to one end of the second side beam 20, and the extension direction of the first side beam 10 is different from the extension direction of the second side beam 20; a first connecting portion 30, the first connecting portion 30 includes a first fixing plate 31 and a second fixing plate 32 connected to each other, the first connecting portion 30 is installed on the inner side of the corner area formed by the connection between the first side beam 10 and the second side beam 20, the first fixing plate 31 is fixed to the first side beam 10, and the second fixing plate 32 is fixed to the second side beam 20; a second connecting portion 40, the second connecting portion 40 includes a third fixing plate 41 and a fourth fixing plate 42 connected to each other, the second connecting portion 40 is installed on the outer side of the corner area, the third fixing plate 41 is fixed to the first side beam 10, and the fourth fixing plate 42 is fixed to the second side beam 20.

[0027] Adhesive fixing is used to preliminarily fix the first side beam 10 and the second side beam 20. The first connecting portion 30 and the second connecting portion 40 realize a stable fixed connection between the first side beam 10 and the second side beam 20. The first connecting portion 30 and the second connecting portion 40 reinforce the corner area formed by the connection from the inside and outside respectively, which not only avoids the use of welding connection method, but also realizes a stable connection between the first side beam 10 and the second side beam 20.

[0028] It should be noted that adhesive fixation refers to the use of glue or colloid to bond one end of the first side beam 10 and one end of the second side beam 20 together. Adhesive fixation needs to ensure that the connection between the first side beam 10 and the second side beam 20 has good sealing performance. Sealing performance refers to that the connection is tightly connected.

[0029] Furthermore, the first side beam 10 has an opposing first outer side surface 107 and a opposing first inner side surface 101, and the outer side surface of the first fixing plate 31 contacts the inner side surface 101 of the first side beam; the second side beam 20 has an opposing second outer side surface 207 and a opposing second inner side surface 201, and the outer side surface of the second fixing plate 32 contacts the second inner side surface 201. In other words, the first connecting portion 30 and the first side beam 10 are in surface-to-surface contact, and the first connecting portion 30 and the second side beam 20 are also in surface-to-surface contact, which helps ensure that the first connecting portion 30 stably fixes the first side beam 10 and the second side beam 20.

[0030] Furthermore, the inner side surface of the third fixing plate 41 contacts the first outer side surface 107 of the first side beam, and the inner side surface of the fourth fixing plate 42 contacts the second outer side surface 207 of the second side beam. Similarly, the second connecting portion 40 and the first side beam 10 are in surface-to-surface contact, and the second connecting portion 40 and the second side beam 20 are also in surface-to-surface contact, which helps ensure that the second connecting portion 40 stably fixes the first side beam 10 and the second side beam 20.

[0031] Furthermore, the first side beam 10 has a first cavity 100, and the first side beam 10 includes a first inner plate 102 and a first outer plate 103 that are opposite to each other and surround the first cavity 100, and the first fixed plate 31 is fixed to the first inner plate 102 by at least one blind rivet 50; the second side beam 20 has a second cavity 200, and the second side beam 20 includes a second inner plate 202 and a second outer plate 203 that are opposite to each other and surround the second cavity 200, and the second fixed plate 32 is fixed to the second inner plate 202 by at least one blind rivet 50.

[0032] That is, both the first side beam 10 and the second side beam 20 are hollow structures, which is beneficial for reducing the weight of the first side beam 10 and the second side beam 20, and is beneficial for reducing the consumable materials of the first side beam 10 and the second side beam 20. Since both the first side beam 10 and the second side beam 20 are hollow structures, the use of blind rivets 50 to connect the first connecting portion 30 to the first side beam 10 and to connect the first connecting portion 30 to the second side beam 20 can reduce the difficulty of fixing the first connecting portion 30 to the first side beam 10 and to the second side beam 20, and can also ensure the stability of the fixation.

[0033] Furthermore, the third fixing plate 41 is fixed to the first outer plate 103 by at least one blind rivet 50, and the fourth fixing plate 42 is fixed to the second outer plate 203 by at least one blind rivet 50. The use of blind rivets 50 to connect the second connecting portion 40 to the first side beam 10 and to connect the second connecting portion 40 to the second side beam 20 helps to reduce the difficulty of fixing the second connecting portion 40 to the first side beam 10 and to reduce the difficulty of fixing the second connecting portion 40 to the second side beam 20, and can also ensure the stability of the fixation.

[0034] Regarding the fixing method using blind rivets 50, it can be understood that the first fixing plate 31 and the first inner plate 102 are both provided with corresponding mounting holes for installing the blind rivets 50; the second fixing plate 32 and the second inner plate 202 are both provided with corresponding mounting holes for installing the blind rivets 50; the third fixing plate 41 and the first outer plate 103 are both provided with corresponding mounting holes for installing the blind rivets 50; the fourth fixing plate 42 and the second outer plate 203 are also both provided with corresponding mounting holes for installing the blind rivets 50.

[0035] In some embodiments of the present invention, the first fixed plate 31 is fixed to the first inner plate 102 by five blind rivets 50, the second fixed plate 32 is fixed to the second inner plate 202 by five blind rivets 50, the third fixed plate 41 is fixed to the first outer plate 103 by five blind rivets 50, and the fourth fixed plate 42 is fixed to the second outer plate 203 by five blind rivets 50.

[0036] Furthermore, the first side beam 10 further includes a first top plate 105 and a first bottom plate 106 . The first top plate 105 , the first inner plate 102 , the first outer plate 103 and the first bottom plate 106 together form a first cavity 100 .

[0037] Furthermore, the second side beam 20 further includes a second top plate 205 and a second bottom plate 206 . The second top plate 205 , the second inner plate 202 , the second outer plate 203 and the second bottom plate 206 together form a second cavity 200 .

[0038] Furthermore, first cavity 100 includes a first sub-cavity 110 and a second sub-cavity 120. First side beam 10 includes a first reinforcing plate 104. First reinforcing plate 104 separates first sub-cavity 110 from second sub-cavity 120, and two opposing edges of first reinforcing plate 104 are respectively connected to first outer plate 103 and first inner plate 102. First reinforcing plate 104 is used to increase the structural strength of first side beam 10.

[0039] Furthermore, the second cavity 200 includes a third sub-cavity 210 and a fourth sub-cavity 220. The second side beam 20 includes a second reinforcing plate 204. The second reinforcing plate 204 separates the third sub-cavity 210 and the fourth sub-cavity 220. The second reinforcing plate 204 has two opposite edges connected to the second outer panel 203 and the second inner panel 202, respectively. The second reinforcing plate 204 is used to increase the structural strength of the second side beam 20.

[0040] Furthermore, the extension direction of the first side beam 10 is perpendicular to the extension direction of the second side beam 20 , the first connecting portion 30 is L-shaped, and the second connecting portion 40 is L-shaped.

[0041] Furthermore, the first fixing plate 31 and the second fixing plate 32 are integrally formed, and the third fixing plate 41 and the fourth fixing plate 42 are integrally formed.

[0042] After simulation analysis and verification, it was found that the sealing performance of the battery pack shell frame structure formed by the cold connection method of the present invention meets the requirements, and the rigidity of the battery pack shell frame structure can be increased by 10% to 15%.

[0043] In summary, the battery pack shell frame structure provided by the present invention adopts cold connection, which not only meets the sealing requirements, but also eliminates the deformation of the battery pack shell frame structure caused by welding heat. Compared with the method of using welding fixtures for auxiliary welding, it avoids the design of welding fixtures and the debugging of welding fixtures, which is beneficial to saving time and also helps to improve the working environment of workers.

[0044] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this disclosure can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution disclosed in this disclosure can be achieved. This is not a limitation herein.

[0045] The above specific embodiments do not limit the scope of protection of this utility model. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model shall be included within the scope of protection of this utility model.

Claims

1. A battery pack housing frame structure, characterized in that: include: a first side beam and a second side beam, wherein one end of the first side beam is glued and fixed to one end of the second side beam, and an extension direction of the first side beam is different from an extension direction of the second side beam; A first connecting portion, the first connecting portion comprising a first fixing plate and a second fixing plate connected to each other, the first connecting portion being mounted on an inner side of a corner area formed by the connection between the first side beam and the second side beam, the first fixing plate being fixed to the first side beam, and the second fixing plate being fixed to the second side beam; The second connecting part includes a third fixing plate and a fourth fixing plate connected to each other, the second connecting part is installed on the outside of the corner area, the third fixing plate is fixed to the first side beam, and the fourth fixing plate is fixed to the second side beam.

2. The battery pack housing frame structure according to claim 1, characterized in that: The first side beam has a first outer side surface and a first inner side surface relative to each other, and the outer side surface of the first fixing plate contacts the first inner side surface of the first side beam; the second side beam has a second outer side surface and a second inner side surface relative to each other, and the outer side surface of the second fixing plate contacts the second inner side surface of the second side beam.

3. The battery pack housing frame structure according to claim 2, characterized in that: The inner side surface of the third fixing plate contacts the first outer side surface of the first side beam, and the inner side surface of the fourth fixing plate contacts the second outer side surface of the second side beam.

4. The battery pack housing frame structure according to claim 1, characterized in that: The first side beam has a first cavity, and the first side beam includes a first inner plate and a first outer plate that surround the first cavity and are oppositely arranged, and the first fixing plate is fixed to the first inner plate by at least one blind rivet; The second side beam has a second cavity, and includes a second inner plate and a second outer plate that surround the second cavity and are oppositely arranged. The second fixing plate is fixed to the second inner plate by at least one blind rivet.

5. The battery pack housing frame structure according to claim 4, characterized in that: The third fixing plate is fixed to the first outer plate by at least one blind rivet, and the fourth fixing plate is fixed to the second outer plate by at least one blind rivet.

6. The battery pack housing frame structure according to claim 4, characterized in that: The first mold cavity includes a first sub-mold cavity and a second sub-mold cavity, and the first side beam includes a first reinforcing plate, which separates the first sub-mold cavity and the second sub-mold cavity, and the two opposite edges of the first reinforcing plate are respectively connected to the first outer plate and the first inner plate.

7. The battery pack housing frame structure according to claim 4, characterized in that: The second mold cavity includes a third sub-mold cavity and a fourth sub-mold cavity, and the second side beam includes a second reinforcing plate, which separates the third sub-mold cavity and the fourth sub-mold cavity, and the two opposite edges of the second reinforcing plate are respectively connected to the second outer plate and the second inner plate.

8. The battery pack housing frame structure according to claim 1, characterized in that: An extension direction of the first side beam is perpendicular to an extension direction of the second side beam. The first connecting portion is L-shaped, and the second connecting portion is L-shaped.

9. The battery pack housing frame structure according to claim 1, characterized in that: The first fixing plate and the second fixing plate are integrally formed, and the third fixing plate and the fourth fixing plate are integrally formed.

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