Battery lower shell fixed mounting structure, battery pack and vehicle

Abstract

The utility model provides a fixed mounting structure for a lower shell of a battery, which is used for mounting the lower shell with an electric appliance plug-in on a protective plate at the bottom of a vehicle, and comprises a first connecting part, a second connecting part and a third connecting part, one end of the first connecting part is fixed on the bottom surface of the lower shell, and the other end of the first connecting part extends and is fixedly connected to the protective plate. According to the utility model, the interference of the plug-in on the lower shell on the installation of the protective plate is eliminated, so that the sealing strip between the lower shell and the protective plate is tightly clamped between the lower shell and the protective plate, the sealing performance and the safety of the battery pack are ensured, and the use quality of a vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, and in particular to a battery lower shell fixing and mounting structure, a battery pack and a vehicle. Background Art

[0002] Electric vehicles are the development direction of new energy vehicles. They use power battery packs to store electrical energy as a power source to drive the vehicle. As electric vehicles become more and more popular, the safety of battery packs has attracted more and more attention. In order to prevent the battery pack from being hit by foreign objects on the bottom and ensure the safety of the battery pack, a protective plate is usually set under the battery pack to protect the battery pack.

[0003] In the related art, the guard plate is connected to the lower shell of the battery pack by installing a rivet nut on the lower shell, and then a bolt is used to penetrate the guard plate and connect it to the rivet nut to fix the guard plate to the lower shell. The electrical connection between the battery pack and the electric vehicle is achieved through an electrical plug-in set on the side of the lower shell; in order to avoid interference between the electrical plug-in and the rivet nut, the spacing between adjacent rivet nuts is usually adjusted, and too large a spacing will reduce the sealing of the sealing strip clamped between the lower shell and the guard plate, thereby affecting the safety of the battery pack and the quality of use of the vehicle. Utility Model Content

[0004] In view of this, the utility model aims to propose a battery lower shell fixed installation structure to eliminate the interference of the electrical plug-in on the lower shell with the installation of the guard plate, ensure the sealing and safety of the battery pack, and improve the quality of vehicle use.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A battery lower housing fixing and mounting structure is used to mount the lower housing with an electrical plug-in on a guard plate at the bottom of a vehicle, and the mounting structure comprises:

[0007] The first connection part is arranged in the projection area of ​​the electrical plug-in on the guard plate, one end of the first connection part is fixed on the bottom surface of the lower shell, and the other end extends and is fixedly connected to the guard plate.

[0008] Furthermore, the first connection portion is constructed as a stud welded on the bottom surface of the lower shell.

[0009] Furthermore, the head of the stud is fixed to the inner surface of the bottom surface by projection welding, and the bolt portion of the stud passes through the bottom surface and the guard plate in sequence; a nut screwed on the stud is provided below the guard plate.

[0010] Furthermore, a spacer block is provided between the bottom surface and the guard plate, and the distance between the bottom surface and the guard plate is maintained due to the spacer block.

[0011] Furthermore, the cushion block is sleeved on the bolt portion.

[0012] Furthermore, a second connecting portion for fixing the bottom surface and the guard plate is provided outside the projection area of ​​the guard plate on the electrical plug-in.

[0013] Furthermore, the second connecting portion is constructed as a rivet member riveted between the bottom surface and the guard plate.

[0014] Furthermore, the second connection portion is configured to be a plurality of portions distributed between the bottom surface and the guard plate.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] The battery lower shell fixing and installation structure described in the utility model is provided with a first connection part in the projection area of ​​the electrical plug-in on the guard plate, and one end of the first connection part is fixed on the bottom surface of the lower shell, and the other end of the first connection part is extended and fixed on the guard plate. The interference between the first connection part and the electrical plug-in located on the side wall of the lower shell is avoided, and the space occupied by the first connection part on the lower shell is reduced, so that the connection between the lower shell and the guard plate is also provided in the projection area of ​​the electrical plug-in on the guard plate, so that the lower shell and the guard plate can squeeze the sealing strip between the two, thereby improving the sealing between the lower shell and the guard plate, ensuring the sealing and safety of the battery pack, and improving the use quality of the vehicle.

[0017] Secondly, the first connection part is constructed as a stud welded on the bottom surface of the lower shell. The welded stud can prevent the first connection part and the lower shell from relative movement or rotation, making it convenient for the guard plate to pass through the stud; the first connection part is set as a stud to facilitate screwing with the nut under the guard plate, thereby facilitating the assembly of the first connection part.

[0018] By arranging the head of the stud to be fixed on the inner surface of the base plate by projection welding, it is ensured that the stud will not move or rotate with the lower shell. At the same time, when the guard plate is fixed to the stud by nuts, the base plate of the lower shell will always bear and support the head of the stud when the guard plate bears weight, thereby improving the connection stability between the guard plate and the lower shell.

[0019] In addition, by setting the pad, the distance between the guard plate and the lower shell can be adjusted so that the guard plate is connected to the lower shell in a flat state. By setting the pad, the second connecting part can be adjusted to connect the guard plate and the lower shell so that the guard plate is in a flat state.

[0020] By providing the second connecting portion, the guard plate can be fixed to the lower shell in a variety of fixing methods, thereby avoiding the failure of fixing of the guard plate due to the failure of a certain fixing method, and ensuring the stability of the connection between the guard plate and the lower shell.

[0021] The second connection part is configured as a rivet, which can withstand large tension and pressure, and can also effectively solve the problem of loosening and failure of the connection.

[0022] The utility model also provides a battery pack, comprising the battery lower shell fixing and installation structure as described above.

[0023] The battery pack of the utility model eliminates the interference caused by the plug-in on the lower shell when the guard plate is installed by providing the above-mentioned battery lower shell fixing installation structure, ensures the sealing of the sealing strip between the lower shell and the guard plate, and ensures the sealing and safety of the battery pack.

[0024] The utility model also provides a vehicle, comprising the battery pack arranged as above.

[0025] The vehicle of the utility model is equipped with a battery pack arranged as above, thereby improving the sealing and safety of the battery pack during use of the vehicle, reducing the impact of outside air and rain on the battery pack, ensuring the power stability of the vehicle, and improving the use quality of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0027] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the utility model;

[0028] Figure 2 The first embodiment of the present utility model is a schematic diagram showing the position of the first connecting portion;

[0029] Figure 3 The first embodiment of the present utility model is a cross-sectional view showing the bottom surface;

[0030] Figure 4 This is the first embodiment of the utility model Figure 3 A partial enlarged schematic diagram of part A;

[0031] Figure 5 This is the first embodiment of the utility model Figure 3 A partial enlarged schematic diagram of part B.

[0032] Description of reference numerals: 1. guard plate;

[0033] 101, boss portion;

[0034] 2. a first connecting portion;

[0035] 201, stud; 201a, head; 201b, bolt; 202, nut; 202a, flange surface;

[0036] 3. Electrical plug-in;

[0037] 4. Lower shell;

[0038] 401, frame beam; 402, bottom surface; 403, installation cavity;

[0039] 5. Pads;

[0040] 6. Second connecting portion;

[0041] 601, rivet part; 601a, pull cap; 601b, pull rivet bolt. DETAILED DESCRIPTION

[0042] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0043] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0045] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0046] Embodiment 1

[0047] The present embodiment relates to a battery lower shell fixed installation structure to eliminate the interference caused by the electrical plug-in 3 on the lower shell 4 on the installation of the guard plate 1, ensure the sealing and safety of the battery pack, and improve the use quality of the vehicle.

[0048] In terms of overall structure, the battery lower housing fixed installation structure is used to install the lower housing 4 with the electrical plug-in 3 on the guard plate 1 at the bottom of the vehicle. The installation structure includes:

[0049] The first connection part 2 is arranged in the projection area of ​​the electrical plug-in 3 on the guard plate 1 , one end of the first connection part 2 is fixed on the bottom surface 402 of the lower shell 4 , and the other end extends and is fixedly connected to the guard plate 1 .

[0050] As described above, by arranging the first connection part 2 in the projection area of ​​the electrical plug-in 3 on the guard plate 1, and fixing one end of the first connection part 2 on the bottom surface 402 of the lower shell 4, the other end of the first connection part 2 is extended and fixed on the guard plate 1. The interference between the first connection part 2 and the electrical plug-in 3 located on the side wall of the lower shell 4 is avoided, and the space occupied by the first connection part 2 on the lower shell 4 is reduced, so that the electrical plug-in 3 is also arranged in the projection area of ​​the guard plate 1. The lower shell 4 and the guard plate 1 can be squeezed tightly to form a sealing strip between the two, thereby improving the sealing between the lower shell 4 and the guard plate 1, ensuring the sealing and safety of the battery pack, and improving the use quality of the vehicle.

[0051] Based on the above overall introduction, the battery lower housing fixed installation structure in this embodiment is as follows: Figures 1 to 5 As shown, the lower shell 4 includes a frame beam 401, the frame beam 401 is annular, and the guard plate 1 is connected to the frame beam 401; the frame beam 401 is hollow inside to form a mounting cavity 403, and one end of the first connecting portion 2 is fixedly connected to the bottom surface 402 of the lower shell 4, that is, one end of the first connecting portion 2 is located in the mounting cavity 403 of the frame beam 401 and is fixedly connected to the bottom plate of the frame beam 401. The first connecting portion 2 set in this way can reduce the space occupied by the lower shell 4, thereby eliminating the interference caused by the electrical plug-in 3 on the lower shell 4; realize the uniform and tight connection between the lower shell 4 and the guard plate 1; at the same time, increase the installation space of the electrical plug-in 3, and improve the volume utilization rate of the power battery. The setting of the mounting cavity 403 not only provides an installation space for the first connecting portion 2, but also when the lower shell 4 is subjected to external impact, the setting of the mounting cavity 403 provides a collapse space for the lower shell 4, thereby reducing or avoiding the external impact force from being transmitted to the battery cell in the lower shell 4, thereby improving the safety of the battery pack.

[0052] It should be noted here that the structure of the lower shell 4 not described in this embodiment can refer to the common structural parts in the prior art and will not be described again here. For example, a cross beam can be set in the frame beam 401 to further improve the overall structural strength of the lower shell 4.

[0053] like Figure 2 and Figure 4 As shown, the circumferential area of ​​the guard plate 1 is constructed with a boss portion 101 protruding toward the lower shell body 4. The boss portion 101 is stamped and formed integrally with the guard plate 1, and the boss portions 101 are equidistantly distributed along the circumference of the guard plate 1. There is also a boss portion 101 in the projection area of ​​the electrical plug-in 3 on the guard plate 1. The first connecting portion 2 is connected to the boss portion 101. At the same time, the lower shell body 4 and the guard plate 1 are both connected through the boss portion 101.

[0054] In order to facilitate the fixing of the first connecting portion 2 and the lower shell 4, as shown in FIG. Figure 3 to Figure 4 As shown, the first connection part 2 is constructed as a stud 201 welded on the bottom surface 402 of the lower shell 4; the welded stud 201 can prevent the first connection part 2 and the lower shell 4 from relative movement or rotation, making it easy for the guard plate 1 to pass through the stud 201.

[0055] Based on the purpose of connecting the lower shell 4 and the guard plate 1 through the stud 201, in order to improve the connection strength between the stud 201 and the lower shell 4; as an implementable method, Figures 2 to 4 As shown, the head 201a of the stud 201 is fixed on the inner surface of the bottom surface 402 by projection welding, and the bolt portion 201b of the stud 201 sequentially penetrates the bottom surface 402 and the guard plate 1; a nut 202 screwed on the stud 201 is provided below the guard plate 1. By setting the head 201a of the stud 201 to be fixed on the inner surface of the bottom plate by projection welding, the stud 201 will not move or rotate with the lower shell 4, and when the guard plate 1 is fixed to the stud 201 by the nut 202, the bottom plate of the lower shell 4 will always bear and hold the head 201a of the stud 201 when the guard plate 1 bears weight, thereby improving the connection stability between the guard plate 1 and the lower shell 4.

[0056] The surface of the nut 202 that is close to and abuts the guard plate 1 is set as a flange surface 202a, and the cross-sectional area of ​​the flange surface 202a is larger than the cross-sectional area of ​​the parent body of the nut 202. After the flange surface 202a abuts the guard plate 1, it is located in the recess formed by the boss portion 101. The flange surface 202a set in this way increases the contact area between the nut 202 and the guard plate 1, increases the friction between the two, can prevent the nut 202 from loosening, and improves the stability of the connection at this location.

[0057] In order to adjust the distance between the guard plate 1 and the lower shell 4, the guard plate 1 is connected to the lower shell 4 in a flat state, such as Figures 2 to 4As shown, a pad 5 is provided between the bottom surface 402 and the guard plate 1. Due to the pad 5, the spacing between the bottom surface 402 and the guard plate 1 is maintained. By providing the pad 5, the guard plate 1 is adjusted to be in a flat state after being fixed, thereby achieving equal extrusion of the sealing strip between the guard plate 1 and the lower shell 4. The sealing between the guard plate 1 and the lower shell 4 is ensured by ensuring that the deformation amount of the sealing strip is consistent. As a specific implementable method, a through hole is provided in the middle of the pad 5 so that the pad 5 is annular, and the annular pad 5 is sleeved on the bolt portion 201b of the stud 201. As arranged above, after the pad 5 is fixed, it will not be vibrated and move during the use of the battery pack, thereby improving the stability of the pad 5.

[0058] In order to ensure the connection stability between the guard plate 1 and the lower shell 4 and avoid fixing failure; Figure 2 As shown, outside the projection area of ​​the electrical plug-in 3 on the guard plate 1, a second connecting portion 6 is provided to form a fixed connection between the bottom surface 402 and the guard plate 1. By providing the second connecting portion 6, the guard plate 1 and the lower housing 4 can be fixed in a variety of ways, avoiding the failure of fixing the guard plate 1 due to the failure of a certain fixing method, thereby ensuring the stability of the connection between the guard plate 1 and the lower housing 4. At the same time, after the distance between the guard plate 1 and the lower housing 4 is adjusted by providing the cushion block 5, it is convenient to fix the guard plate 1 in a variety of ways, while still ensuring that the guard plate 1 is in a flat state.

[0059] Based on the purpose of providing a second connection portion 6 for fixing the bottom surface 402 and the guard plate 1 outside the projection area of ​​the electrical plug-in 3 on the guard plate 1, the second connection portion 6 can be set as a clamping member or a rivet member 601 to achieve the connection between the guard plate 1 and the lower shell 4. In this embodiment, as an implementable method, Figure 3 and Figure 5 As shown, the second connection part 6 is configured as a rivet 601 distributed between the bottom surface 402 and the guard plate 1. The second connection part 6 is configured as a rivet 601, which can withstand large tension and pressure, and can also effectively solve the problem of loosening and failure of the connection part.

[0060] Riveting is divided into pull riveting, open riveting, semi-open riveting and filling riveting etc. In order to facilitate single-sided operation on the side of the guard plate 1 away from the lower shell 4; as an implementable method, the rivet 601 is selected as a pull riveting type rivet 601.

[0061] like Figure 3 and Figure 5As shown, the rivet 601 includes a cap 601a and a rivet bolt 601b. The main body of the cap 601a is inserted into the installation cavity 403 of the frame beam 401. The edge of the cap 601a is as thick as the cushion block 5 and is pressed against the lower shell 4. The rivet bolt 601b passes through the guard plate 1 from the boss portion 101 and is inserted into the cap 601a. ​​The rivet bolt 601b is riveted by a rivet gun. Under the action of the pulling force, the part of the cap 601a located in the installation cavity 403 is deformed by force, thereby forming an extrusion boss. The extrusion boss approaches the edge of the cap 601a to press the anchored guard plate 1 and the lower shell 4. The whole process is easy to operate. Compared with ordinary bolt connections, it is not only more firmly connected, but also not easy to loosen, ensuring the reliability of the connection.

[0062] In order to make the riveting more stable, the second connection parts 6 are arranged to be multiple and distributed between the bottom surface 402 and the guard plate 1. In this embodiment, outside the projection area of ​​the electrical plug-in 3 on the guard plate 1, the second connection parts 6 are evenly distributed along the circumference of the guard plate 1.

[0063] When the battery lower shell fixing and installation structure of this embodiment is used, a stud 201 is arranged in the projection area of ​​the electrical plug-in 3 on the guard plate 1, and the head 201a of the stud 201 is fixed to the inner surface of the bottom surface 402 by projection welding, and the bolt portion 201b of the stud 201 sequentially penetrates the bottom surface 402 and the guard plate 1, and then the nut 202 is screwed under the guard plate 1. A rivet is arranged outside the projection area of ​​the electrical plug-in 3 on the guard plate 1, and the rivet bolt 601b is riveted by a rivet gun. Under the action of the pulling force, the part of the rivet cap 601a located in the installation cavity 403 is deformed by force, thereby forming an extrusion boss, and the extrusion boss approaches the edge of the rivet cap 601a, so that the guard plate 1 and the lower shell 4 are pressed tightly after anchoring.

[0064] By setting the first connection part 2 in the projection area of ​​the electrical plug-in 3 on the guard plate 1, and fixing one end of the first connection part 2 on the bottom surface 402 of the lower shell 4, the other end of the first connection part 2 is extended and fixed on the guard plate 1. The interference between the first connection part 2 and the electrical plug-in 3 located on the side wall of the lower shell 4 is avoided, and the space occupied by the first connection part 2 on the lower shell 4 is reduced, so that the electrical plug-in 3 is also provided with a connection between the lower shell 4 and the guard plate 1 in the projection area of ​​the guard plate 1, so that the lower shell 4 and the guard plate 1 can squeeze the sealing strip between the two, and improve the sealing between the lower shell 4 and the guard plate 1. By setting the second connection part 6, the guard plate 1 and the lower shell 4 can be fixed in a variety of ways, avoiding the failure of fixing the guard plate 1 due to the failure of a certain fixing method, and ensuring the stability of the connection between the guard plate 1 and the lower shell 4. Ensure the sealing and safety of the battery pack and improve the quality of vehicle use.

[0065] Embodiment 2

[0066] The present embodiment relates to a battery pack, including the battery lower shell fixing and mounting structure as described above. The battery pack of the present embodiment is equipped with the battery pack lower shell 4 as described above, thereby eliminating the interference caused by the plug-in on the lower shell 4 when installing the guard plate 1, thereby ensuring the sealing and safety of the battery pack.

[0067] Embodiment 3

[0068] This embodiment relates to a vehicle, including the battery pack as described above. The vehicle of this embodiment is equipped with the battery as described above, which improves the sealing and safety of the battery pack, so as to ensure that the battery pack has stable sealing in rainy weather, thereby ensuring the safety of the battery pack and improving the use quality of the vehicle.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery lower housing fixed installation structure, used to install the lower housing with an electrical plug-in on the guard plate at the bottom of the vehicle, characterized in that: The mounting structure includes: The first connection part is arranged in the projection area of ​​the electrical plug-in on the guard plate, one end of the first connection part is fixed on the bottom surface of the lower shell, and the other end extends and is fixedly connected to the guard plate.

2. The battery lower housing fixing and installation structure according to claim 1, characterized in that: The first connection portion is configured as a stud welded on the bottom surface of the lower housing.

3. The battery lower housing fixing and installation structure according to claim 2, characterized in that: The head of the stud is fixed on the inner surface of the bottom surface by projection welding, and the bolt portion of the stud passes through the bottom surface and the guard plate in sequence; a nut screwed on the stud is provided below the guard plate.

4. The battery lower housing fixing and installation structure according to claim 3, characterized in that: A spacer is provided between the bottom surface and the guard plate, and the distance between the bottom surface and the guard plate is maintained by the spacer.

5. The battery lower housing fixing and installation structure according to claim 4, characterized in that: The cushion block is sleeved on the bolt portion.

6. The battery lower housing fixing and installation structure according to any one of claims 1 to 5, characterized in that: A second connecting portion for fixing the bottom surface and the guard plate is provided outside the projection area of ​​the electrical plug-in on the guard plate.

7. The battery lower housing fixing and installation structure according to claim 6, characterized in that: The second connection portion is configured as a rivet riveted between the bottom surface and the guard plate.

8. The battery lower housing fixing and installation structure according to claim 7, characterized in that: The second connection portion is provided in plurality and distributed between the bottom surface and the guard plate.

9. A battery pack, characterized in that: The battery pack has a battery lower shell fixing and installation structure as claimed in any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle is equipped with the battery pack as claimed in claim 9.

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