Electric vehicle

Abstract

The application discloses an electric vehicle. The electric vehicle comprises a battery pack, a vehicle body, a positioning pin and a locking piece. The positioning pin is fixed to the vehicle body and is provided with a guide structure. The battery pack is provided with a plurality of positioning holes penetrating through the battery pack, and the positioning holes comprise a matching hole. The positioning pin is inserted into the positioning hole under the action of the guide structure, and the guide structure abuts against the inner wall of the matching hole. The locking piece is locked with the positioning pin through the positioning hole. Through cooperation of the positioning hole, the positioning pin and the locking piece, the battery pack does not need a tray for assembly, thereby saving cost, reducing time required for installation of the battery pack, and facilitating easy assembly of the battery pack to the vehicle body and quick installation of the battery pack after sale.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile, in particular to an electric vehicle. BACKGROUND

[0002] The battery pack is a core component of the electric vehicle. In the production process, the battery pack needs to be installed on the vehicle body with the help of tooling. Therefore, a large number of toolings must be made to meet the installation of the battery pack. Tooling will increase the cost, and during the installation process, the tooling needs to be placed, which will increase the time required for the entire process of installing the battery pack. Therefore, reducing the cost of installing the battery pack and reducing the time required for installing the battery pack are technical problems to be solved. SUMMARY

[0003] The purpose of the present application is to provide an electric vehicle. The cost of installing the battery pack of the electric vehicle is low, and the required time is less.

[0004] The present application provides an electric vehicle. The electric vehicle includes a battery pack, a vehicle body, a positioning pin and a locking piece. The positioning pin is fixed to the vehicle body and is provided with a guide structure. The battery pack is provided with a plurality of positioning holes penetrating the battery pack, and the positioning holes include a matching hole. The positioning pin is inserted into the positioning hole under the action of the guide structure, and the guide structure abuts against the inner wall of the matching hole. The locking piece is locked through the positioning hole and the positioning pin.

[0005] In some embodiments, the positioning pin is provided with an internal thread, and the locking piece is a bolt. The shank of the bolt is inserted into the positioning pin to be threadedly connected with the positioning pin. Alternatively, the locking piece and the positioning pin are relatively rotated to be locked through a buckle structure.

[0006] In some embodiments, the positioning pin includes a connecting hole, the inner wall of the connecting hole includes a lower inner wall and an upper inner wall, the lower inner wall is flat and located between the guide structure and the upper inner wall, and the upper inner wall is provided with the internal thread.

[0007] In some embodiments, the positioning hole includes a through hole and a receiving hole, the through hole is in communication with the receiving hole and the matching hole, the receiving hole is larger than the through hole to form a step, the shank is sequentially inserted into the through hole and the positioning pin, the head of the bolt abuts against the step, and the head is not lower than the back surface of the battery pack in the vertical direction.

[0008] In some embodiments, the length of the thread engagement between the positioning pin and the locking piece is L, and L≥20mm.

[0009] In some embodiments, the end portion of the positioning pin gradually increases in the vertically upward direction to serve as the positioning structure, and the matching hole gradually increases from bottom to top.

[0010] In some embodiments, the guide structure comprises a guide surface, and an angle between the guide surface and the vertical direction is a, 10 degrees≤a≤20 degrees.

[0011] In some embodiments, the guide structure and the matching hole are both frustoconical or right prism.

[0012] In some embodiments, the plurality of positioning holes comprises a main positioning hole and an auxiliary positioning hole, the main positioning hole is a circular hole, the auxiliary positioning hole is a waist-shaped hole, a center of the main positioning hole is located on an extension line of a center line of the auxiliary positioning hole in a length direction, and a line connecting the main positioning hole and the auxiliary positioning hole is inclined to a long side and a wide side of the battery pack, and the main positioning hole and the auxiliary positioning hole are clearance fitted with the corresponding positioning pin.

[0013] In some embodiments, the battery pack is further provided with a through hole, the through hole is larger than the main positioning hole, and the battery pack and the vehicle body are connected through a bolt passing through the through hole.

[0014] In some embodiments, the vehicle body comprises an assembly surface abutting a front surface of the battery pack, and a fixing hole is formed by recessing from the assembly surface to an interior of the vehicle body; the positioning pin comprises a boss, a width of the boss along a radial direction of the positioning pin is D2, 4 mm≤D2≤7 mm; the positioning pin is inserted into the fixing hole; and the boss is welded or riveted with a side surface of the fixing hole.

[0015] In some embodiments, the boss is flush with the assembly surface.

[0016] In some embodiments, the positioning hole is located at an edge of the battery pack, and the positioning pin is arranged at a rocker of the vehicle body, a cross beam of the vehicle body, or a longitudinal beam of the vehicle body.

[0017] As described above, since the positioning pin is fixed on the vehicle body, the positioning pin is inserted into the positioning hole under the action of the guide structure, and the guide structure abuts against an inner wall of the matching hole, and finally, the locking member locks the positioning pin, thereby, during installation of the battery pack on the vehicle body, a tray is not required, the cost of the electric vehicle can be reduced, and the time required for installation of the battery pack can be reduced. Without the tray, the positioning pin is inserted into the positioning hole, and the locking member locks the positioning pin, and there is no problem of the tray blocking the line of sight, in combination with the guiding action of the guide structure, the difficulty of insertion of the positioning pin into the positioning hole is low, the battery pack is more easily assembled on the vehicle body, further, the guide structure abuts against the inner wall of the matching hole, the locking member is more easily aligned with the positioning pin, and the locking member and the positioning pin are locked. Finally, in the after-sales maintenance, the tray is also not required, and the battery pack can still be quickly installed through the positioning pin, the locking member, and the positioning hole. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the battery pack, vehicle body, and tray in a disassembled state, according to related technologies.

[0019] Figure 2 This is a schematic diagram showing the body and battery pack of an electric vehicle in a disassembled state according to an embodiment of this application;

[0020] Figure 3 yes Figure 2 The diagram shown illustrates the vehicle body and battery pack in an assembled state.

[0021] Figure 4 yes Figure 3 Enlarged view of section A;

[0022] Figure 5 This is a schematic diagram showing the distribution of positioning holes on the battery pack. Detailed Implementation

[0023] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses consistent with some aspects of this application as detailed in the appended claims.

[0024] The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Unless otherwise defined, all terms (including technical and scientific terms) used in the present application are intended to have the meaning commonly understood by one of ordinary skill in the art. Any use of section headings is intended to aid reading of the application and is not intended to be used to limit the scope of the application. The use of "first", "second", and / or "third" to describe various embodiments is not meant to denote a particular order and / or importance, but is meant to denote that a particular feature will be discussed in more detail. Similarly, the use of "one" or "another" is not meant to denote a particular number or quantity, but is meant to denote at least one. The use of "a" or "an" is not meant to denote a quantity of one, but is meant to denote at least one. The use of "multiple" or "plurality" denotes two or more. The use of "front", "back", "top", "bottom", and / or "side" is meant to denote a relative position and / or orientation, not an absolute position or orientation. The use of "include", "includes", "including", and / or "comprise", "comprises", "comprising" is meant to denote an open-ended inclusion, not an exclusive inclusion. The use of "connected" or "coupled" is meant to denote a direct or indirect connection or coupling between two or more elements, and can include electrical, mechanical, logical, and / or other connections or couplings. The use of "a" or "one" is meant to denote "at least one" or "one or more". The use of "and / or" is meant to denote any or all possible combinations of one or more associated items.

[0025] Referring to Figure 1 In the related art, the process of installing the battery pack 1 using the tray 9 as a jig is as follows: The battery pack 1 is provided with a battery pack mounting hole 19. The vehicle body 2 is provided with a vehicle body mounting hole 29. The tray 9 is provided with a positioning pin 4. The positioning pin 4 on the tray 9 is inserted into the battery pack mounting hole 19 and the vehicle body mounting hole 29, thereby achieving the installation and positioning of the battery pack 1.

[0026] In the above installation method of the battery pack 1, a plurality of trays 9 need to be made, thereby increasing the cost of the electric vehicle. During the installation process, the need to place the tray 9 increases the time required to install the battery pack 1. Furthermore, the positioning pin 4 on the tray 9 needs to pass through the battery pack mounting hole 19 first and then pass through the vehicle body mounting hole 29, and the tray 9 has already blocked the line of sight, increasing the difficulty of inserting the positioning pin 4.

[0027] To solve the above problems, the application provides an electric vehicle. The electric vehicle comprises a battery pack 1, a vehicle body 2, a locking piece 3 and a positioning pin 4. The positioning pin 4 is fixed to the vehicle body 2 and is provided with a guide structure 41. The positioning pin 4 can be fixed to the vehicle body 2 by any structure, such as welding, riveting or buckle structure, etc. The battery pack 1 is provided with a plurality of positioning holes 11 penetrating the battery pack 1. The positioning holes 11 are not limited in structure, for example, the positioning holes 11 can be directly formed on the battery pack 1 when the strength of the battery pack 1 is sufficient, and for example, Figure 2 In the case where the strength of the battery pack 1 may be affected or insufficient to achieve the positioning, a pipe is fixed on the battery pack 1, and the pipe is installed on the battery pack 1 to form the positioning hole 11. The positioning hole 11 comprises a matching hole 111. Referring to Figure 4 and combining Figure 3 , the positioning pin 4 is inserted into the positioning hole 11 under the action of the guide structure 41, and the guide structure 41 abuts against the inner wall 1111 of the matching hole 111. The locking piece 3 is locked with the positioning pin 4 through the positioning hole 11. Based on the action of the locking piece 3, the structure of the locking piece 3 is not limited, which can be locked with the positioning pin 4 to achieve the positioning of the battery pack 1 on the vehicle body 2.

[0028] As described above, since the vehicle body 2 is fixed with the positioning pin 4, the positioning pin 4 is inserted into the positioning hole 11 under the action of the guide structure 41 and the guide structure 41 abuts against the inner wall 1111 of the matching hole 111, and finally the locking piece 3 locks the positioning pin 4. Therefore, during the installation of the battery pack 1 on the vehicle body 2, the tray 9 is not needed, the cost of the electric vehicle can be reduced, and the time required for installing the battery pack 1 can be reduced. Without the tray 9, the positioning pin 4 is inserted into the positioning hole 11, and then the locking piece 3 is used to lock the positioning pin 4, so that the problem of visual obstruction by the tray 9 does not exist. In combination with the guiding action of the guide structure 41, the positioning pin 4 is easily inserted into the positioning hole 11, and the battery pack 1 is more easily assembled on the vehicle body 2. Further, the guide structure 41 abuts against the inner wall 1111 of the matching hole 111, so that the locking piece 3 is more easily aligned with the positioning pin 4 (as described later, the locking piece 3 is more easily aligned with the connecting hole 42), which is conducive to the locking of the locking piece 3 with the positioning pin 4. Finally, in the after-sales maintenance, the tray 9 is also not needed, and the above-mentioned positioning pin 4, locking piece 3 and positioning hole 11 can still be used to quickly install the battery pack 1.

[0029] Please refer to Figure 2 and combining Figure 3 and Figure 4, the positioning pin 4 is provided with internal threads, and the locking member 3 is a bolt, a shank 31 of the bolt is inserted into the positioning pin 4 to be threadedly connected with the positioning pin 4. In other embodiments, the locking member 3 is locked with the positioning pin 4 by a buckling structure, for example, one of the locking member 3 and the positioning pin 4 is provided with a locking buckle, and the other is provided with a matching buckle. The locking buckle and the matching buckle constitute the buckling structure. The locking member 3 is rotated relative to the positioning pin 4 in a first direction, the locking buckle is locked with the matching buckle, and the locking buckle is rotated in a second direction opposite to the first direction, and the locking buckle is unlocked with the matching buckle.

[0030] As arranged above, since the positioning pin 4 is threadedly connected with the locking member 3 or is locked with the locking member 3 by relative rotation, the connection between the positioning pin 4 and the locking member 3 is convenient.

[0031] Please refer to Figure 2 and combine Figure 3 and Figure 4 , the positioning pin 4 comprises a connecting hole 42, an inner wall of the connecting hole 42 comprises a lower inner wall 421 and an upper inner wall 422, the lower inner wall 421 is flat, which is relative to threads, that is, the lower inner wall 421 is not provided with threads, so that the shank 31 can be inserted. The lower inner wall 421 is located between the guide structure 41 and the upper inner wall 422, and the upper inner wall 422 is provided with internal threads.

[0032] As arranged above, since the lower inner wall 421 is flat and located between the guide structure 41 and the upper inner wall 422, and the upper inner wall 422 is provided with internal threads, the hole corresponding to the lower inner wall 421 is larger than the hole corresponding to the upper inner wall 422. In the case that the locking member 3 is a bolt, the lower inner wall 421 can guide the shank 31 of the bolt, so that the external threads of the shank 31 are connected with the internal threads of the positioning pin 4.

[0033] Please refer to Figure 2 and combine Figure 3 and Figure 4 , the positioning hole 11 comprises a through hole 112 and a receiving hole 113, the through hole 112 is communicated with the receiving hole 113 and the matching hole 111. The receiving hole 113 is larger than the through hole 112 to form a step 114. The shank 31 is inserted into the through hole 112 and the positioning pin 4 (that is, the connecting hole 42 of the positioning pin 4) in sequence. The head 32 of the bolt is located in the receiving hole 113 and abuts against the step 114. The head 32 is not lower than the back surface of the battery pack 1 in the vertical direction, and the back surface is a surface of the battery pack 1 opposite to the vehicle body 2. The not lower than includes two cases: 1) as shown in Figure 3 and Figure 4As shown, the head 32 does not protrude from the accommodating hole 113, i.e. is higher than the back surface 12, 2) the head 32 can also be flush with the back surface 12

[0034] As described above, due to the threaded rod 31 being inserted into the through hole 112 and the positioning pin 4 in turn, and in addition, the head 32 of the locking piece 3 abutting against the step 114, the locking is more reliable. Moreover, since the head 32 is located in the accommodating hole 113 and is not lower than the back surface 12 of the battery pack 1, i.e. the end portion does not protrude from the accommodating hole 113, the battery pack 1 is aesthetically installed with the vehicle body 2 after installation, the locking piece 3 and the end portion are not easy to be contaminated by dirt and other impurities, and the end portion is also not easy to be knocked and cause safety hazards.

[0035] Please continue to refer to Figure 4 and combine Figure 3 In the case where the positioning pin 4 and the locking piece 3 are locked by the aforementioned thread, the length of the thread engagement between the positioning pin 4 and the locking piece 3 is L, and L≥20mm.

[0036] As described above, since L≥20mm, the length of the engagement is relatively long, the locking piece 3 can be more firmly locked with the positioning pin 4, and in turn, the battery pack 1 is more firmly installed with the vehicle body 2.

[0037] Please refer to Figure 2 , Figure 3 and Figure 4 , the end portion of the positioning pin 4 gradually increases in the vertically upward direction to serve as the positioning structure 41. The fitting hole 111 gradually increases from bottom to top.

[0038] As described above, since the end portion gradually increases in the vertically upward direction to serve as the positioning structure 41, and the fitting hole 111 gradually increases from bottom to top, the guiding effect is better, and the end portion as the positioning structure can achieve guiding by inserting the positioning pin 4, which is more conducive to the installation of the battery pack 1 with the vehicle body 2.

[0039] Please continue to refer to Figure 2 and combine Figure 3 and Figure 4 , the guiding structure 41 includes a guiding surface 411, and the included angle between the guiding surface 411 and the vertical direction is a, and 10 degrees≤a≤20 degrees. For example, 10 degrees, 12 degrees, 13 degrees, 14 degrees, 15 degrees, 16 degrees, 17 degrees, 18 degrees, 19 degrees or 20 degrees. Please refer to Figure 3 and Figure 4 , the abutting of the guiding structure 41 and the inner wall of the fitting hole 111 will also cause the abutting of the guiding surface 411 and the inner wall.

[0040] As described above, since 10 degrees≤a≤20 degrees, the guiding surface 411 is relatively steep, which is more conducive to guiding the positioning pin 4, and is more convenient for the installation of the battery pack 1 with the vehicle body 2.

[0041] In some embodiments, the guiding structure 41 and the matching hole 111 are both frustoconical or right prism, in which case the side of the frustocone or the right prism is the guiding surface 411.

[0042] As set forth above, since the matching hole 111 is frustoconical or right prism, there are multiple directions for guiding, and the guiding effect is better.

[0043] Please refer to Figure 5 The plurality of positioning holes 11 include a main positioning hole 115 and an auxiliary positioning hole 116. The main positioning hole 115 is a circular hole, and the auxiliary positioning hole 116 is a waist-shaped hole. The center of the main positioning hole 115 is located on the extension line of the center line of the auxiliary positioning hole 116 in the length direction, and the connecting line of the auxiliary positioning hole 116 and the main positioning hole 115 is inclined to the long side and the wide side of the battery pack 1. The main positioning hole 115 and the auxiliary positioning hole 116 are gap-fitted with the corresponding positioning pin 4. Figure 5 In some embodiments, the connecting line is a diagonal line of the battery pack 1, so it is inclined to the long side and the wide side of the battery pack 1. In some embodiments, the connecting line can also be parallel to the diagonal line. The gap fitting is, for example, that the main positioning hole 115 is single-sidedly gap-fitted with the positioning pin 4 by 0.5 mm, the auxiliary positioning hole 116 is single-sidedly gap-fitted in the connecting line direction (in the length direction of the waist-shaped hole) by 2 mm, and single-sidedly gap-fitted in the direction perpendicular to the connecting line (in the width direction of the waist-shaped hole) by 0.5 mm.

[0044] As set forth above, since the center of the main positioning hole 115 is located on the extension line of the center line of the auxiliary positioning hole 116 in the length direction, the connecting line of the auxiliary positioning hole 116 and the main positioning hole 115 is inclined to the long side and the wide side of the battery pack 1, and gap-fitted with the corresponding positioning pin 4, the positioning accuracy is maximized, and the gap fitting allows the relative movement between the positioning pin 4 and the battery pack 1, thereby limiting the rotation of the battery pack 1.

[0045] Please continue to refer to Figure 5 The battery pack 1 is also provided with a through hole 117, the through hole 117 is larger than the main positioning hole 115, and the battery pack 1 and the vehicle body 2 are connected by a bolt passing through the through hole.

[0046] As set forth above, since the battery pack 1 also includes a through hole 117, after the main positioning hole 115 and the auxiliary positioning hole 116 are respectively fitted with the positioning pin 4 to achieve positioning, the through hole 117 is larger than the main positioning hole 115, so the position can be adjusted if necessary, thereby improving the installation accuracy between the battery pack 1 and the vehicle body 2.

[0047] Please refer to Figure 4 and in combination withFigure 3 The vehicle body 2 includes an assembly surface 21 which is attached to the front surface of the battery pack 1, and a fixing hole 22 which is recessed from the assembly surface 21 to the inside of the vehicle body 2. The assembly surface 21 refers to the surface of the vehicle body 2 which is attached to the battery pack 1 during assembly of the vehicle body 2 and the battery pack 1, and can be a part of the surface of the vehicle body. The positioning pin 4 includes a boss 43, and the width of the boss 43 along the radial direction of the positioning pin 4 is D2, 4mm≤D2≤7mm. The positioning pin 4 is inserted into the fixing hole 22, the boss 43 is welded or riveted to the side surface of the fixing hole 22, and is flush with the assembly surface 21.

[0048] As described above, because of the 4mm≤D2≤7mm, the amount of lap joint with the end of the vehicle body is ensured, and the welding tolerance is absorbed, and thus the positioning pin 4 is reliably fixed to the vehicle body 2.

[0049] Figure 2 、 Figure 3 and Figure 4 The boss 43 is flush with the assembly surface 21, and thus the assembly surface 21 is attached to the front surface of the battery pack 1, which facilitates assembly of the battery pack 1 and the vehicle body 2. Of course, in some embodiments, the boss 43 can not be flush with the assembly surface 21.

[0050] In some embodiments, referring to Figure 5 The positioning hole 11 is located at the edge of the battery pack 1. The positioning pin 4 is provided on the rocker of the vehicle body 2, the cross beam of the vehicle body 2, or the longitudinal beam of the vehicle body 2, and in this case, the positioning pin 4 can have the structure as shown in the foregoing (such as including the D2), or can have other structures, but at least includes the guide structure 41.

[0051] As described above, because the battery pack 1 and the vehicle body 2 are assembled by cooperation of the positioning hole 11, the positioning pin 4, and the locking member 3, the positioning hole 11 is arranged at any position of the edge of the battery pack 1, which facilitates the layout of other components of the battery pack 1.

[0052] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. An electric vehicle, characterized in that, The electric vehicle includes a battery pack, a body, a positioning pin, and a locking component. The positioning pin is fixed to the body and is provided with a guide structure. The battery pack is provided with multiple positioning holes penetrating the battery pack, and each positioning hole includes a mating hole. The positioning pin is inserted into the positioning hole under the action of the guide structure, and the guide structure abuts against the inner wall of the mating hole; The locking element passes through the positioning hole and locks with the positioning pin; The locating pin is provided with internal threads, and the locking member is a bolt. The bolt's thread is inserted into the locating pin to connect with the locating pin by threads; or, the locking member rotates relative to the locating pin and is locked by a snap-fit ​​structure. The positioning pin includes a connecting hole, the inner wall of which includes a lower inner wall and an upper inner wall. The lower inner wall is flat and located between the guide structure and the upper inner wall. The upper inner wall is provided with the internal thread. The positioning hole includes a through hole and a receiving hole. The through hole is directly connected to the receiving hole and the mating hole. The receiving hole is larger than the through hole to form a step. The screw is inserted into the through hole and the positioning pin in sequence. The head of the screw is located in the receiving hole and also abuts against the step.

2. The electric vehicle according to claim 1, characterized in that, The head is not lower than the back of the battery pack in the vertical direction; And / or, the length of the thread engagement between the locating pin and the locking member is L, where L≥20mm.

3. The electric vehicle according to claim 1, characterized in that, The end of the positioning pin gradually increases in the vertically upward direction to serve as the guide structure; The mating holes gradually increase in size from bottom to top.

4. The electric vehicle according to claim 3, characterized in that, The guide structure includes a guide surface, and the angle between the guide surface and the vertical direction is α, where 10 degrees ≤ α ≤ 20 degrees. And / or, both the guide structure and the mating hole are frustum-shaped or truncated pyramid-shaped.

5. The electric vehicle according to claim 1, characterized in that, The plurality of positioning holes include a main positioning hole and an auxiliary positioning hole. The main positioning hole is a round hole, and the auxiliary positioning hole is an oblong hole. The center of the main positioning hole is located on the extension line of the center line of the auxiliary positioning hole along the length direction, and the line connecting the auxiliary positioning hole and the main positioning hole is inclined to the long side and the wide side of the battery pack. The main positioning hole and the auxiliary positioning hole are clearance-fitted with the corresponding positioning pin.

6. The electric vehicle according to claim 5, characterized in that, The battery pack is also provided with a through hole, which is larger than the main positioning hole, and the battery pack and the vehicle body are connected by bolts passing through the through hole.

7. The electric vehicle according to claim 1, characterized in that, The vehicle body includes an assembly surface that fits against the front of the battery pack, and a fixing hole is recessed into the vehicle body from the assembly surface; the positioning pin includes a boss with a radial width D2 of 4mm≤D2≤7mm. The positioning pin is inserted into the fixing hole; the boss is welded or riveted to the side of the fixing hole; And / or, the positioning hole is located at the edge of the battery pack, and the positioning pin is provided on the vehicle body door sill, the vehicle body crossbeam, or the vehicle body longitudinal beam.

8. The electric vehicle according to claim 7, characterized in that, The boss is flush with the assembly surface.

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