Anti-deformation mechanism and battery pack

Abstract

The utility model relates to the related technical field of batteries, in particular to an anti-deformation mechanism and a battery pack, the anti-deformation mechanism is used for being installed on a metal component of a battery pack tray, a cavity is formed in the metal component, and the metal component comprises a main body wall defining the cavity and side parts oppositely formed on the two sides of the main body wall; the anti-deformation mechanism is at least partially located in the cavity, and the anti-deformation mechanism comprises a base part which is provided with an abutting face used for abutting against the main body wall; the at least two clamping parts are arranged on the two sides of the base part and are used for being clamped into the side parts; according to the anti-deformation mechanism, the deformation of a welded product can be restrained, the welding quality of a metal component is effectively improved, and then reworking, repairing and the like can be reduced by improving the welding quality, so that the welding efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a deformation prevention mechanism and a battery pack. Background Art

[0002] During the welding process of the metal component of the battery pack tray of an existing vehicle and the tray body, the heat input will cause the metal component to deform, and the surface flatness (flatness > 0.3 mm) cannot meet the airtight requirements for battery pack assembly (inflation pressure ≥ 5 Kpa, leakage value < 50 pa). To solve this problem, the existing technology usually adopts the stitch welding technology. After the temperature stabilizes, stitch welding is continued and so on in a cycle. However, this technology has the following problems: 1. The appearance of the weld is not beautiful; 2. The welding time is greatly prolonged; 3. The effect of controlling deformation after welding is unstable. Summary of the Utility Model

[0003] Based on this, it is necessary to provide a deformation prevention mechanism that can inhibit the deformation of the product after welding and improve the welding quality of the metal component.

[0004] To solve the above technical problems, the present application provides the following technical solution: A deformation prevention mechanism is used to be installed on the metal component of the battery pack tray. The metal component forms a cavity. The metal component includes a main body wall surrounding the cavity and side portions formed oppositely on both sides of the main body wall. At least a part of the deformation prevention mechanism is located in the cavity. The deformation prevention mechanism includes:

[0005] A base portion having an abutting surface for abutting against the main body wall; and

[0006] At least two clamping portions are provided on both sides of the base portion for clamping into the side portions; the clamping portion has a pushing surface for abutting against the side portion, and the orientation of the pushing surface is opposite to the orientation of the abutting surface.

[0007] It can be understood that by abutting against the main body wall and the side portions through the pushing surface and the abutting surface respectively, and since the orientations of the pushing surface and the abutting surface are opposite, the acting forces applied by the two on the main body wall and the side portions are opposite, and this acting force is opposite to the deformation direction of the product caused by the heat input during the welding process of the metal component. Thus, the acting force acting on the metal component through the pushing surface and the abutting surface can inhibit the deformation of the product after welding, effectively improving the welding quality of the metal component. Furthermore, by improving the welding quality, rework and repair can be reduced, thereby improving the welding efficiency.

[0008] In one embodiment, the clamping portion is movably connected to the base portion, and the clamping portion can move relative to the base portion along a first direction, and the first direction is the arrangement direction of the clamping portion and the base portion.

[0009] It can be understood that since the clamping portion can move relative to the base portion in the first direction, the relative position between the clamping portion and the base portion changes, so that the anti-deformation mechanism can have different lengths in different states in the first direction. Thus, first, when the anti-deformation mechanism is installed on the metal member, it can be shortened according to the cavity height of the metal member, so that the anti-deformation mechanism can be directly inserted into the specified position. After it is installed in the cavity, then move the clamping portion to insert it into the side portion to finally complete the fixation of the anti-deformation mechanism. This method is beneficial to the installation of the anti-deformation mechanism and is particularly suitable for metal members with a longer length. Second, since different lengths can be formed between the clamping portion and the base portion, the anti-deformation mechanism can adapt to metal members of different sizes and models, improving the applicability of the anti-deformation mechanism.

[0010] In one embodiment, a locking structure is provided between the clamping portion and the base portion, and the locking structure restricts the clamping portion from moving relative to the base portion in the first direction.

[0011] It can be understood that by providing the locking structure, it is possible to prevent the clamping portion from moving relative to the base portion under the action of external force or gravity to ensure the stability of the anti-deformation mechanism.

[0012] In one embodiment, the locking structure includes an abutting wall formed on one of the clamping portion and the base portion and a locking member formed on the other, and the locking member abuts against the abutting wall to lock the clamping portion and the base portion.

[0013] It can be understood that the locking between the clamping portion and the base portion is achieved by the frictional fit between the locking member and the abutting wall, which simplifies the locking structure and is convenient for implementation and manufacturing.

[0014] In one embodiment, the locking member is a fastener, a threaded through hole is formed on one of the clamping portion and the base portion, the fastener is installed on the threaded through hole, and the rod end of the fastener abuts against the abutting wall.

[0015] It can be understood that locking is achieved through the fastener, further simplifying the structure.

[0016] In one embodiment, a plugging groove for inserting the clamping portion is formed on the base portion, and the direction in which the clamping portion is inserted into the plugging groove is the same as the first direction.

[0017] It can be understood that by providing the plugging groove on the base portion, it is beneficial to the arrangement between the clamping portion and the base portion and also helps to simplify the structure.

[0018] In one embodiment, the base has a plurality of wall bodies that enclose and form the insertion slot. A sliding through-hole is formed on one of the wall bodies, and the threaded through-hole is formed on the clamping portion. The fastener passes through the sliding through-hole and is inserted into the threaded through-hole.

[0019] It can be understood that by forming the sliding through-hole on the side wall, while facilitating the passing of the fastener, it also avoids interference between the side wall and the fastener. At the same time, the sliding through-hole can also limit the movement of the fastener within a certain range in the first direction, thereby preventing excessive movement of the clamping portion.

[0020] In one embodiment, the clamping portion has an end for inserting into the side portion, and a guiding surface is formed on the end.

[0021] It can be understood that by forming the guiding surface on the clamping portion, it helps the clamping portion to be inserted into the side portion, facilitating the installation of this anti-deformation mechanism onto the metal member.

[0022] In one embodiment, a material scooping groove is concavely formed in the abutting surface.

[0023] It can be understood that by providing the material scooping groove, the stress of the abutting surface can be reduced.

[0024] The present application also provides the following technical solution: A battery pack, including a battery pack box body and a battery module disposed within the battery pack box body. The battery pack box body includes a metal member and the above anti-deformation mechanism.

[0025] It can be understood that by installing this anti-deformation mechanism on the metal member, the deformation of the product after welding can be effectively suppressed. Thus, it helps to improve the quality of the battery pack box body.

[0026] Compared with the prior art, by using the anti-deformation mechanism of the present application on the metal member of the battery pack tray, during application, the abutting surface and the abutting face of the present application respectively abut against the main body wall and the side portion. And because the orientations of the abutting surface and the abutting face are opposite, the forces exerted by the two on the main body wall and the side portion are opposite. And this force is opposite to the deformation direction of the product caused by the heat input during the welding of the metal member. Thus, through the forces exerted on the metal member by the abutting surface and the abutting face, the deformation of the product after welding can be suppressed, effectively improving the welding quality of the metal member. Furthermore, by improving the welding quality, rework and repair can be reduced, thereby improving the welding efficiency. Description of the Drawings

[0027] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0028] Figure 1 Schematic structural diagram of an anti-deformation mechanism provided by the present application during application;

[0029] Figure 2 For Figure 1 Schematic structural diagram of the anti-deformation mechanism shown;

[0030] Figure 3 For Figure 2 Exploded view of the anti-deformation mechanism shown;

[0031] Figure 4 For Figure 2 Cross-sectional view of the anti-deformation mechanism shown.

[0032] The reference numerals of each component are as follows:

[0033] 10. Metal component; 11. Cavity; 12. Main body wall; 13. Side part; 20. Anti-deformation mechanism; 21. Base; 211. Contact surface; 212. Front end surface; 213. Mark; 214. Material scooping groove; 215. Insertion groove; 216. Wall body; 217. Sliding through hole; 22. Clamping part; 221. Pushing surface; 222. Guiding surface; 223. First clamping part; 224. Second clamping part; 225. Side wall; 311. Contact wall; 312. Locking part; 313. Threaded through hole. Specific embodiments

[0034] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will make a detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0035] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are only for the purpose of illustration and do not represent the only implementation.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] In this application, unless otherwise clearly specified and limited, the first feature may be in direct contact with the second feature "on" or "under" the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0038] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific implementations and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0039] The battery pack shown in an embodiment of this application includes a battery pack box body and a battery module (not shown) disposed in the battery pack box body, etc. In this embodiment, the battery pack is applied to a vehicle, such as an automobile. The battery module can adopt the existing technology and will not be described in detail herein. The battery pack box body includes a battery pack tray and cross beams disposed on the battery pack tray, etc. The battery pack tray includes a tray body, a metal member 10 disposed on the tray body, and a deformation prevention mechanism 20 mounted on the metal member 10. The battery pack box body can be set to different volumes and structures according to actual needs and will not be elaborated herein. Please refer to Figure 1 and Figure 2, the metal member 10 is formed with a cavity 11, and the anti-deformation mechanism 20 is at least partially located within the cavity 11. The metal member 10 includes a main body wall 12 that encloses to form the cavity 11 and side portions 13 that are oppositely formed on both sides of the main body wall 12. The metal member 10 can be a sheet metal or an aluminum profile. In this embodiment, the aluminum profile is taken as an example for description.

[0040] The anti-deformation mechanism 20 includes a base portion 21 and two clamping portions 22. The base portion 21 has an abutting surface 211 for abutting against the main body wall 12. The two clamping portions 22 are disposed on both sides of the base portion 21 for clamping into the side portions 13. The clamping portion 22 has a pushing surface 221 for abutting against the side portion 13. The orientation of the pushing surface 221 is opposite to that of the abutting surface 211. In other embodiments, the clamping portion 22 can also be provided with other numbers according to actual requirements, which will not be elaborated herein.

[0041] During the welding process of the metal member 10 without the anti-deformation mechanism 20 installed, the heat input will cause the metal member 10 to deform. As shown in Figure 1 , the side portion 13 of the metal member 10 will deform in the direction of arrow a1, and the main body wall 12 will deform in the direction of arrow a2. In this embodiment, by using the anti-deformation mechanism 20 on the metal member 10 of the battery pack tray, during application, the pushing surface 221 and the abutting surface of the anti-deformation mechanism 20 respectively abut against the main body wall 12 and the side portion 13. And because the orientations of the pushing surface 221 and the abutting surface 211 are opposite, the acting forces applied by the two on the main body wall 12 and the side portion 13 are opposite. Among them, the acting force applied by the pushing surface 221 on the main body wall 12 is as shown by the arrow F1 direction in Figure 1 , and the acting force applied by the abutting surface 211 on the side wall is as shown by the arrow F2 direction in Figure 1 . These two acting forces F1 and F2 are also opposite to the deformation direction of the product caused by the heat input during the welding process of the metal member 10. In this way, through the acting forces of the pushing surface 221 and the abutting surface 211 acting on the metal member 10, the deformation of the product after welding can be inhibited, effectively improving the welding quality of the metal member 10. Furthermore, by improving the welding quality, rework and repair can be reduced, etc., thereby improving the welding efficiency. It should also be noted that by installing the anti-deformation mechanism 20 on the metal member 10, the deformation of the product after welding can be effectively inhibited. In this way, it helps to improve the quality of the battery pack box. In addition, when this battery pack is applied to a new energy vehicle, since it solves the deformation problem of the aluminum profile during welding, and the use of the aluminum profile has a lighter weight compared to other metal members, the application of this battery pack helps to meet the lightweight requirements of new energy vehicles.

[0042] Please refer to Figures 2 to 3In this embodiment, the base 21 is roughly rectangular. The base 21 also has a front end face 212 facing opposite to the abutting face 211. For easy installation, a mark 213 is provided on the front end face 212. A material cutting groove 214 is formed inwardly on the abutting face 211. The material cutting groove 214 can reduce the stress of the abutting face 211.

[0043] The metal component 10 usually has a certain length. When the anti-deformation mechanism 20 is installed on the metal component 10, it can be inserted from the cross-section of the metal component 10. However, this method is not convenient for use in practical applications. After the anti-deformation mechanism 20 is inserted from the cross-section of the metal component 10, it needs to be moved to a desired position. In addition, the cross-section of some metal components 10 is a closed end. Therefore, in order to facilitate the assembly of the anti-deformation mechanism 20, in this embodiment, the clamping portion 22 is movably connected to the base 21, and the clamping portion 22 can be relative to the base 21 along the first direction ( Figure 4 The direction indicated by the arrow b1-b2 is the first direction). The first direction is the arrangement direction of the clamping portion 22 and the base 21. For the convenience of description, the first direction is referred to as the length direction of the anti-deformation mechanism 20. Of course, in other embodiments, the clamping portion 22 and the base 21 can also be fixedly connected. Moreover, when the clamping portion 22 and the base 21 are fixed structures, the two can be an integrated structure or a split structure.

[0044] Compared with the fixed connection between the clamping portion 22 and the base 21, in this example, since the clamping portion 22 can move relative to the base 21 along the first direction b1-b2, the relative position between the clamping portion 22 and the base 21 changes, so that the anti-deformation mechanism 20 can have different lengths in different states in the first direction b1-b2. In this way, first, when the anti-deformation mechanism 20 is installed on the metal component 10, it can be shortened according to the height of the cavity 11 of the metal component 10, so that the anti-deformation mechanism 20 can be directly inserted into the specified position. After it is installed in the cavity 11, the clamping portion 22 is moved to be inserted into the side 13 to finally complete the fixation of the anti-deformation mechanism 20. This method is conducive to the installation of the anti-deformation mechanism 20, and is particularly suitable for metal components 10 with longer lengths. Second, since different lengths can be formed between the clamping portion 22 and the base 21, the anti-deformation mechanism 20 can adapt to metal components 10 of different sizes and models, thereby improving the applicability of the anti-deformation mechanism 20.

[0045] During use, in order to prevent the clamping portion 22 from moving relative to the base 21 under the action of external force or gravity, in this embodiment, a locking structure is provided between the clamping portion 22 and the base 21, and the locking structure limits the movement of the clamping portion 22 relative to the base 21 in a first direction. In this way, the stability of the anti-deformation mechanism 20 can be ensured by providing the locking structure.

[0046] In one embodiment, the locking structure includes an abutting wall 311 formed on one of the clamping portion 22 and the base portion 21 and a locking member 312 formed on the other. The locking member 312 abuts against the abutting wall 311 to lock the clamping portion 22 and the base portion 21. The locking between the clamping portion 22 and the base portion 21 is achieved by the friction fit between the locking member 312 and the abutting wall 311, which simplifies the locking structure and is convenient for implementation and manufacturing. Specifically, the locking member 312 is a fastener, and a threaded through hole 313 is formed on one of the clamping portion 22 and the base portion 21. The fastener is installed on the threaded through hole 313, and the rod end of the fastener abuts against the abutting wall 311. The number of the fasteners is set corresponding to the number of the clamping portions 22. Locking is achieved through the fasteners, further simplifying the structure.

[0047] In other embodiments, the locking between the clamping portion 22 and the base portion 21 can also be achieved through other locking structures. For example, the locking structure includes a plurality of locking grooves and locking buttons. Specifically, a plurality of locking grooves are formed on one of the clamping portion 22 and the base portion 21, and a locking block is arranged on the other. The plurality of locking grooves are arranged along the first direction b1-b2. Before the clamping portion 22 needs to be moved, the locking button is first unlocked from the locking groove. When the clamping portion 22 is moved to the required position, the locking button is snapped into the corresponding locking groove to complete the locking.

[0048] In this embodiment, an insertion slot 215 for inserting the clamping portion 22 is formed on the base portion 21. The direction in which the clamping portion 22 is inserted into the insertion slot 215 is the same as the first direction b1-b2. The number of the insertion slots 215 is set corresponding to the number of the clamping portions 22. By providing the insertion slot 215 on the base portion 21, it is beneficial to the arrangement between the clamping portion 22 and the base portion 21 and also helps to simplify the structure. Specifically, the base portion 21 has a plurality of wall bodies 216 surrounding and forming the insertion slot 215. A sliding through hole 217 is formed on one of the wall bodies 216. In this embodiment, the sliding through hole 217 is formed on the front end face 212. The sliding through hole 217 penetrates the wall body 216 from the front end face 212 towards the insertion slot 215. The sliding through hole 217 is an elongated waist-shaped hole extending along the first direction b1-b2. The number of the sliding through holes 217 is set corresponding to the number of the insertion slots 215. The threaded through hole 313 is formed on the clamping portion 22, and the fastener passes through the sliding through hole 217 to be inserted into the threaded through hole 313. By forming the sliding through hole 217 on the wall body 216, while facilitating the passing of the fastener, it also avoids interference between the wall body 216 and the fastener. At the same time, the sliding through hole 217 can also limit the movement of the fastener within a certain range in the first direction, thereby preventing the clamping portion 22 from moving excessively.

[0049] In another embodiment, the snap-in portion 22 and the base portion 21 may also be such that a T-shaped slider is formed on one of them and a T-shaped sliding groove is formed on the other, and the cooperation between the T-shaped slider and the T-shaped sliding groove enables the snap-in portion 22 to move relative to the base portion 21.

[0050] For ease of description, the two snap-in portions 22 are respectively named the first snap-in portion 223 and the second snap-in portion 224. The specific assembly manner of the snap-in portion 22 and the base portion 21 is as follows: The first snap-in portion 223 and the second snap-in portion 224 are respectively inserted into the corresponding insertion slots 215, and the two fasteners are respectively inserted into the first snap-in portion 223 and the second snap-in portion 224 through the corresponding sliding through holes 217. Then, by applying force on the fasteners, the first snap-in portion 223 and the second snap-in portion 224 are pushed to move along the first direction b1-b2, so as to adjust the positions of the first snap-in portion 223 and the second snap-in portion 224 relative to the base portion 21; when adjusted to the specified position, the fasteners are screwed to move them towards the abutting wall 311 until the abutting portion of the fasteners abuts against the abutting wall 311, so as to lock the first snap-in portion 223 and the second snap-in portion 224 to the base portion 21.

[0051] The snap-in portion 22 has an end for inserting into the side portion 13, and a guiding surface 222 is formed on the end. By forming the guiding surface 222 on the snap-in portion 22, it helps the snap-in portion 22 to be inserted into the side portion 13, facilitating the installation of the anti-deformation mechanism 20 onto the metal member 10. The snap-in portion 22 has a lateral wall 225, the lateral wall 225 extends along the first direction b1-b2, the lateral wall 225 is a wave structure, and the corresponding wall body 216 on the base portion 21 is also a wave structure. In this way, when the snap-in portion 22 moves relative to the base portion 21, the movement of the snap-in portion 22 relative to the base portion 21 in the second upward direction ( Figure 4 the direction indicated by the arrow c1-c1 in the figure) can be restricted, and only the movement in the first direction b1-b2 is achieved. The second direction c1-c1 is perpendicular to the first direction b1-b2.

[0052] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0053] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application shall be subject to the appended claims.

Claims

1. A deformation prevention mechanism, characterized in that, For installation on a metal member of a battery pack tray, the metal member is formed with a cavity, the metal member includes a main body wall surrounding and forming the cavity and side portions oppositely formed on both sides of the main body wall, the anti-deformation mechanism is at least partially located in the cavity, and the anti-deformation mechanism includes: A base portion having an abutting surface for abutting against the main body wall; and At least two clamping portions provided on both sides of the base portion for clamping into the side portions; the clamping portions have a pushing surface for abutting against the side portions, and the orientation of the pushing surface is opposite to the orientation of the abutting surface.

2. The anti-deformation mechanism according to claim 1, wherein The clamping portion is movably connected to the base portion, and the clamping portion can move relative to the base portion in a first direction, and the first direction is the arrangement direction of the clamping portion and the base portion.

3. The anti-deformation mechanism according to claim 2, characterized in that, A locking structure is provided between the clamping portion and the base portion, and the locking structure restricts the clamping portion from moving relative to the base portion in the first direction.

4. The anti-deformation mechanism according to claim 3, characterized in that, The locking structure includes an abutting wall formed on one of the clamping portion and the base portion and a locking member formed on the other, and the locking member abuts against the abutting wall to lock the clamping portion and the base portion.

5. The anti-deformation mechanism according to claim 4, characterized in that The locking member is a fastener, a threaded through hole is formed on one of the clamping portion and the base portion, the fastener is installed on the threaded through hole, and the rod end of the fastener abuts against the abutting wall.

6. The anti-deformation mechanism according to claim 5, characterized in that, An insertion slot for inserting the clamping portion is formed on the base portion, and the direction in which the clamping portion is inserted into the insertion slot is the same as the first direction.

7. The anti-deformation mechanism according to claim 6, characterized in that, The base portion has a plurality of wall bodies surrounding and forming the insertion slot, a sliding through hole is formed on one of the wall bodies, the threaded through hole is formed on the clamping portion, and the fastener passes through the sliding through hole to be inserted into the threaded through hole.

8. The anti-deformation mechanism according to claim 1 or 2, characterized in that The clamping portion has an end portion for inserting into the side portion, and a guiding surface is formed on the end portion.

9. The anti-deformation mechanism according to claim 1, wherein A material scooping groove is formed by concave in the abutting surface.

10. A battery pack, characterized in that, It includes a battery pack box body and a battery module arranged in the battery pack box body, and the battery pack box body includes a metal member and the anti-deformation mechanism according to any one of claims 1 to 9.

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