Fixing structure and electric vehicle battery

Abstract

The utility model provides a fixing structure and an electric vehicle battery. The fixing structure comprises a first end cover, a second end cover, a shell and a connecting rod. The first end cover and the second end cover are oppositely located at the two ends of the shell, and the shell is used for containing the battery module. The connecting rod penetrates through the first end cover, and the end part of the connecting rod is propped against one side, far away from the shell, of the first end cover, so that the shell and the battery module are clamped between the first end cover and the second end cover together. According to the fixing structure, the tight connection reliability of the end cover on the battery module can be effectively improved, and the assembling efficiency of the battery of the electric vehicle can be further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially, is related to a fixed structure and electric motor car battery. BACKGROUND

[0002] With the popularity of electric vehicles, the demand for electric vehicles also gradually increases, and the battery as the vehicle energy of electric vehicles, the battery of electric vehicles usually mainly includes upper end cover, shell, lower end cover, battery module and sheet metal support, the existing battery of electric vehicle mainly has the following problems.

[0003] 1. The battery of the electric vehicle is diversified, and the end cover is usually assembled in a way of being fixed to the shell by screws, facing the problem of how to effectively improve the space utilization rate.

[0004] 2. According to the application scene and use environment of the electric vehicle, the battery needs to take safety protection measures, mainly facing the problem of how to improve the structural reliability to ensure the strength, connection reliability and fatigue resistance of the battery and other safety performance.

[0005] 3. The demand for the battery of the electric vehicle is large, facing the problem of how to improve the assembly efficiency.

[0006] For the above three points, the utility model patent application with the application number CN202122945776.9 uses the battery in the battery module to directly set a through groove in the pore, uses a screw rod to pass through the whole through groove, and then fixes and connects the bottom cover and the cover plate on the shell, so as to realize the sealing assembly of the battery module, which effectively solves the problems of improving the space utilization rate and improving the structural reliability, but it needs to open holes on the bottom cover and the protection box, and the end part of the screw rod is screwed by a nut one by one to fix the bottom cover and the cover plate on the shell, so that the number of nuts used is relatively large, causing the assembly efficiency of the bottom cover and the cover plate on the battery module to be relatively low. In order to better adapt to the increase of the demand for electric vehicles, the assembly efficiency of the battery of the electric vehicle needs to be improved. UTILITY MODEL CONTENTS

[0007] The utility model aims at overcoming the defects in the prior art, and provides a fixed structure and electric motor car battery which can further improve the assembly efficiency of the battery of the electric vehicle.

[0008] The utility model aims at overcoming the defects in the prior art, and provides a fixed structure and electric motor car battery which can further improve the assembly efficiency of the battery of the electric vehicle.

[0009] A fixing structure includes a first end cover, a second end cover and a shell, the first end cover and the second end cover oppositely located at two end portions of the shell, the shell is used for accommodating a battery module, the fixing structure further includes a connecting rod, the connecting rod is arranged in the first end cover, and an end portion of the connecting rod is abutted to a side of the first end cover away from the shell, and the connecting rod is used for being arranged in the battery module and screwed to the second end cover, so that the shell and the battery module are clamped between the first end cover and the second end cover.

[0010] In one of the embodiments, the second end cover includes a protection support and an end cover portion, the protection support is arranged in the shell, and the protection support is arranged at a side of the battery module away from the first end cover, the end cover portion is connected to a side of the protection support away from the battery module, and the protection support is screwed with the connecting rod, so that the battery module is clamped between the first end cover and the protection support, and the shell is clamped between the first end cover and the end cover portion.

[0011] In one of the embodiments, a buffer is arranged on the end cover portion, the buffer is arranged at a side of the end cover portion close to the protection support, and the end cover portion is clamped on the protection support, so that the buffer is clamped between the end cover portion and the protection support.

[0012] In one of the embodiments, a clamping member is connected to the end cover portion.

[0013] A stop member is connected to the protection support, and a side of the clamping member close to the end cover portion is abutted to a side of the stop member away from the end cover portion, so that the buffer is clamped between the end cover portion and the protection support.

[0014] In one of the embodiments, the protection support is a sheet metal support.

[0015] In one of the embodiments, a limiting area is arranged at a side of the protection support close to the first end cover, and the limiting area is used for accommodating part of the battery module.

[0016] In one of the embodiments, a screwing area is arranged at a side of the second end cover close to the first end cover, and an end portion of the connecting rod away from the first end cover is screwed at the screwing area.

[0017] In one of the embodiments, an inner wall of the shell is used for abutting with the battery module.

[0018] In one of the embodiments, a limiting member is protruded at a side of the first end cover close to the second end cover, and the limiting member is used for being inserted on the battery module.

[0019] An electric vehicle battery includes a battery module and a fixing structure as described in any of the above embodiments. The battery module is housed within the housing, and the connector passes through the battery module to clamp the battery module between the first end cover and the second end cover.

[0020] Compared with the prior art, the present invention has at least the following advantages:

[0021] The fixing structure of this utility model allows the connecting rod to pass through the first end cover, with the end of the connecting rod abutting against the side of the first end cover away from the housing. This allows the connecting rod to be directly limited at the first end by means of a screw. Furthermore, the connecting rod is used to pass through the battery module and screw onto the second end cover. In this way, the connecting rod fixes both the first and second end covers, thereby achieving the assembly of the first and second end covers onto the battery module. This significantly improves the structural strength and achieves the limiting and fixing of the battery module in the X-axis direction, effectively reducing resonance and improving the connection reliability and fatigue resistance of the battery. In addition, it reduces the use of nuts, making assembly quick and convenient. This not only further and effectively improves the connection reliability of the fixing structure but also effectively increases the assembly efficiency of the fixing structure. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the fixing structure according to one embodiment of the present utility model;

[0024] Figure 2 for Figure 1 Exploded view of the fixed structure shown;

[0025] Figure 3 for Figure 1 A partial sectional view of the fixed structure shown;

[0026] Figure 4 for Figure 1 Another partial sectional view of the fixed structure shown. Detailed Implementation

[0027] For the convenience of understanding the utility model, the utility model will be described more fully below with reference to the relevant drawings. The preferred embodiments of the utility model are shown in the drawings. However, the utility model can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0028] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0030] The application provides a fixing structure. The fixing structure comprises a first end cover, a second end cover, a shell and a connecting rod. The first end cover and the second end cover are oppositely located at two end portions of the shell, and the shell is used for accommodating a battery module. The connecting rod is arranged in the first end cover, and an end portion of the connecting rod abuts against a side of the first end cover away from the shell, so that the shell and the battery module are clamped between the first end cover and the second end cover.

[0031] The fixing structure makes the connecting rod arranged in the first end cover, and the end portion of the connecting rod abuts against the side of the first end cover away from the shell, that is, the connecting rod directly limits the first end portion in the form of a screw, and further cooperates with the connecting rod arranged in the battery module and screwed on the second end cover. In this way, the connecting rod is fixed to the first end cover and the second end cover respectively, thereby realizing the assembly of the first end cover and the second end cover on the battery module, greatly improving the structural strength, and realizing the limiting and fixing of the battery module in the X-axis direction, effectively reducing resonance, improving the connection reliability and fatigue resistance of the battery, in addition, reducing the use of nuts, assembling quickly and conveniently, not only further effectively improving the connection reliability of the fixing structure, but also effectively improving the assembly efficiency of the fixing structure.

[0032] In order to better understand the fixing structure of the application, the fixing structure of the application is further explained as follows:

[0033] Please refer to Figures 1 to 2 The fixing structure 10 of one embodiment includes a first end cover 100, a second end cover 200, a shell 300 and a connecting rod 400. The first end cover 100 and the second end cover 200 are oppositely located at two end portions of the shell 300, and the shell 300 is used for accommodating the battery module 20. The connecting rod 400 is arranged through the first end cover 100, and an end portion of the connecting rod 400 abuts against a side of the first end cover 100 away from the shell 300, and the connecting rod 400 is used for being arranged through the battery module 20 and being screwed on the second end cover 200, so that the shell 300 and the battery module 20 are clamped between the first end cover 100 and the second end cover 200.

[0034] The fixing structure 10 described above makes the connecting rod 400 arranged through the first end cover 100, cooperates the end portion of the connecting rod 400 to abut against the side of the first end cover 100 away from the shell 300, that is, makes the connecting rod 400 directly limit the first end portion in the form of screw, and further cooperates the connecting rod 400 to be arranged through the battery module 20 and be screwed on the second end cover 200, so that the connecting rod 400 is fixed to the first end cover 100 and the second end cover 200 respectively, thereby realizing the assembly of the first end cover 100 and the second end cover 200 on the battery module 20, greatly improving the structural strength, and realizing the limiting and fixing of the battery module 20 in the X-axis direction, effectively reducing the resonance, improving the connection reliability and fatigue resistance of the battery, in addition, reducing the use of nuts, assembling quickly and conveniently, not only further effectively improving the connection reliability of the fixing structure 10, but also effectively realizing the improvement of the assembly efficiency of the fixing structure 10.

[0035] Please refer to Figures 2 to 3 In one embodiment, the second end cover 200 includes a protection bracket 210 and an end cover portion 220, the protection bracket 210 is arranged in the shell 300, and the protection bracket 210 is arranged on a side of the battery module 20 away from the first end cover 100, the end cover portion 220 is connected to a side of the protection bracket 210 away from the battery module 20, and the protection bracket 210 is screwed with the connecting rod 400, so that the battery module 20 is clamped between the first end cover 100 and the protection bracket 210, and the shell 300 is clamped between the first end cover 100 and the end cover portion 220. Further, the protection bracket is a sheet metal bracket. It can be understood that the protection bracket 210 is arranged between the end cover portion 220 and the battery module 20, which effectively improves the fixing effect of the fixing structure 10 on the battery module 20, reduces the movement and shaking of the battery module 20, and plays a role in protecting the battery module 20, reducing the external impact strength received by the battery module 20.

[0036] Please refer to Figures 2 to 3In one of the embodiments, the end cover part 220 is provided with a buffer 230, which is arranged on the side of the end cover part 220 close to the protection support 210, and the end cover part 220 is clamped on the protection support 210, so that the buffer 230 is clamped between the end cover part 220 and the protection support 210, effectively achieving the buffering of the battery module 20 in the X-axis direction.

[0037] Please refer to Figures 2 to 3 In one of the embodiments, the end cover part 220 is provided with a clamping part 240. Further, the protection support 210 is provided with a stop part 250, and the side of the clamping part 240 close to the end cover part 220 abuts against the side of the stop part 250 away from the end cover part 220, so that the buffer 230 is clamped between the end cover part 220 and the protection support 210. Further, the buffer 230 is arranged away from the clamping part 240 and the stop part 250. Further, the clamping part includes a screw and a nut, the screw is detachably arranged on the end cover part, and the screw is clamped on the end cover part, and the end of the screw protrudes from the side of the end cover part close to the protection support and is arranged on at least part of the protection support, and the end of the screw is screwed with the nut, and the side of the nut close to the end cover part abuts against the protection support, so that the end cover part is clamped on the protection support, effectively achieving the effective buffering of the battery module 20 in the X-axis direction, and better achieving the stable connection of the end cover part 220 on the protection support 210.

[0038] Please refer to Figures 2 to 3 In one of the embodiments, the protection support 210 is provided with a limiting area 201 on the side close to the first end cover 100, and the limiting area 201 is used for accommodating part of the battery module 20. Further, the limiting area is a limiting groove or a limiting hole, and the battery module is partially accommodated in the limiting groove or the limiting hole, so as to better achieve the limiting and fixing of the battery module 20 in the Y-axis direction and the Z-axis direction.

[0039] Please refer to Figures 2 to 3 In one of the embodiments, the second end cover 200 is provided with a screwing area 202 on the side close to the first end cover 100, and the end of the connecting rod 400 away from the first end cover 100 is screwed on the screwing area 202. Further, the screwing area is a screwing groove or a screwing hole. Further, the screwing area 202 is arranged on the protection support 210, and the end of the connecting rod 400 away from the first end cover 100 is screwed on the protection support 210 through the screwing area 202.

[0040] Please refer to Figures 2 to 4 In one of the embodiments, the inner wall of the shell 300 is used for abutting against the battery module 20, further improving the limiting and fixing stability of the battery module 20 in the Y-axis direction and the Z-axis direction.

[0041] Please refer to Figure 2And Figure 4 In one embodiment, the first end cover 100 is provided with a limiting piece 110 on the side close to the second end cover 200, and the limiting piece 110 is used for inserting the battery module 20. Further, the battery module 20 is provided with an insertion area 2001, and the limiting piece 110 is inserted in the insertion area 2001. Further, the insertion area is an insertion hole, so as to better realize the limiting and fixing of the battery module 20 in the Y-axis direction and the Z-axis direction.

[0042] The application further relates to a battery for an electric vehicle, which comprises the fixing structure of any one of the above embodiments and a battery module, wherein the battery module is accommodated in the shell, and the connecting piece is arranged through the battery module, so that the battery module is clamped between the first end cover and the second end cover. Figures 1 to 2 In the embodiment, the fixing structure 10 comprises a first end cover 100, a second end cover 200, a shell 300 and a connecting rod 400. The first end cover 100 and the second end cover 200 are oppositely arranged at the two end portions of the shell 300, and the shell 300 is used for accommodating the battery module 20. The connecting rod 400 is arranged through the first end cover 100, and the end portion of the connecting rod 400 abuts against the side of the first end cover 100 away from the shell 300, and the connecting rod 400 is used for being arranged through the battery module 20 and being screwed on the second end cover 200, so that the shell 300 and the battery module 20 are clamped between the first end cover 100 and the second end cover 200.

[0043] The battery for the electric vehicle has the fixing structure, the structural rigidity of the battery module in the battery for the electric vehicle is better improved, the limiting and fixing of the battery module in the X-axis direction are realized, the resonance is effectively reduced, and the connection reliability and the fatigue resistance of the battery for the electric vehicle are improved. In addition, the screw fastening is not required to have a transition outer dimension, the effective optimization of the cross-sectional area of the battery for the electric vehicle is realized, and the effective improvement of the space utilization is realized.

[0044] Compared with the prior art, the utility model has at least the following advantages:

[0045] The fixed structure 10 is used for fixing the first end cover 100 and the second end cover 200 on the battery module 20, and the connecting rod 400 is used for penetrating the first end cover 100 and the second end cover 200, and the connecting rod 400 is screwed on the second end cover 200, so that the connecting rod 400 is fixed on the first end cover 100 and the second end cover 200, and the assembly of the first end cover 100 and the second end cover 200 on the battery module 20 is realized, the structural strength is greatly improved, the limiting and fixing of the battery module 20 in the X-axis direction are realized, the resonance is effectively reduced, the connection reliability and the fatigue resistance of the battery are improved, the use of the nut is reduced, the assembly is quick and convenient, the connection reliability of the fixed structure 10 is further effectively improved, and the assembly efficiency of the fixed structure 10 is effectively improved.

[0046] The above embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not be understood as the limitation of the utility model patent range. It should be pointed out that, for ordinary skilled person in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A fixing structure comprising a first end cover, a second end cover, and a case, the first end cover and the second end cover being located at both end portions of the case in opposition, the case being used to accommodate a battery module, characterized by, The fixing structure further comprises a connecting rod, the connecting rod is arranged through the first end cover, and the end of the connecting rod is abutted against the side of the first end cover away from the shell, and the connecting rod is arranged through the battery module and screwed on the second end cover, so that the shell and the battery module are clamped between the first end cover and the second end cover.

2. The fixing structure according to claim 1, characterized in that, The second end cover comprises a protection support and an end cover part, the protection support is arranged in the shell, and the protection support is arranged on the side of the battery module away from the first end cover, the end cover part is connected to the side of the protection support away from the battery module, and the protection support is screwed with the connecting rod, so that the battery module is clamped between the first end cover and the protection support, and the shell is clamped between the first end cover and the end cover part.

3. The fixture of claim 2, wherein The end cover part is provided with a buffer, the buffer is arranged on the side of the end cover part close to the protection support, and the end cover part is clamped on the protection support, so that the buffer is clamped between the end cover part and the protection support.

4. The fixing structure according to claim 3, characterized in that The end cover part is connected with a clamping piece. The protection support is connected with a stop piece, and the side of the clamping piece close to the end cover part is abutted against the side of the stop piece away from the end cover part, so that the buffer is clamped between the end cover part and the protection support.

5. The fixture of claim 2, wherein The protection support is a sheet metal support.

6. The fixture of claim 2, wherein The side of the protection support close to the first end cover is provided with a limiting area, and the limiting area is used for accommodating part of the battery module.

7. The fixture of claim 1, wherein The side of the second end cover close to the first end cover is provided with a screwing area, and the end of the connecting rod away from the first end cover is screwed at the screwing area.

8. The fixture of claim 1, wherein The inner wall of the shell is used for abutting against the battery module.

9. The fixture of claim 1, wherein The side of the first end cover close to the second end cover is provided with a limiting piece, and the limiting piece is used for being inserted on the battery module.

10. An electric vehicle battery, characterized by The fixing structure comprises a battery module and the fixing structure of any one of claims 1 to 9, the battery module is arranged in the shell, and the connecting piece is arranged through the battery module, so that the battery module is clamped between the first end cover and the second end cover.

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