Lithium battery pack fixing structure

Abstract

The utility model discloses a lithium battery pack fixing structure. The lithium battery pack fixing structure comprises a tray, a connecting assembly and an upper cover, the tray is connected to a vehicle chassis, the tray comprises a bottom plate and a wall body surrounding the edge of the bottom plate in the circumferential direction, a containing cavity with an opening is defined between the bottom plate and the wall body, the containing cavity is used for installing a lithium battery pack, and the wall body comprises a front wall and a rear wall which are opposite; the connecting assembly is arranged in the containing cavity and comprises a plurality of connecting arms, the connecting arms extend in the length direction of the vehicle chassis, the bottoms of the connecting arms are fixedly connected with the bottom plate, the front ends and the rear ends of the connecting arms are fixedly connected with the front wall and the rear wall of the wall body respectively, and the lithium battery pack is fixed in the containing cavity through the connecting arms; the upper cover is located at the opening of the containing cavity and fixedly connected with the tray. The connecting arm extending in the length direction of the vehicle chassis is arranged in the tray and can provide supporting force for the tray, so that the structural stability of the tray is improved, and the deformation resistance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery installation, in particular to a lithium battery pack fixing structure. Background Art

[0002] In recent years, lithium battery packs have been widely used as driving sources for electric vehicles or hybrid vehicles. Lithium battery packs are generally composed of a shell structure and a number of battery cells placed in the shell structure. The shell serves as a fixed structure for the lithium battery pack, and its main function is to provide protection for the lithium battery. Common lithium battery pack fixed structures usually include a bottom plate, side plates surrounding the periphery of the bottom plate, and an upper cover connected to the side plates. Although the structure is simple, its support and protection are insufficient. When the vehicle collides, the shell is easily deformed, thereby squeezing the lithium battery pack inside, causing damage to the lithium battery pack or even fire. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a lithium battery pack fixing structure, in which a connecting arm extending along the length direction of the vehicle chassis is arranged in the tray. The connecting arm can provide supporting force for the tray, thereby facilitating increasing the stability of the tray structure and improving its deformation resistance.

[0004] The technical solution of the utility model is as follows:

[0005] A lithium battery pack fixing structure includes a tray, a connecting assembly and an upper cover. The tray is connected to a vehicle chassis, the tray includes a bottom plate and a wall body surrounding the edge of the bottom plate in a circumferential direction, the bottom plate and the wall body enclose a receiving cavity with an opening, the receiving cavity is used to install the lithium battery pack, and the wall body includes a front wall and a rear wall relative to each other; the connecting assembly is arranged in the receiving cavity, the connecting assembly includes a plurality of connecting arms, the connecting arms extend along the length direction of the vehicle chassis, and the bottom of the connecting arms is fixedly connected to the bottom plate, the front and rear ends of the connecting arms are respectively fixedly connected to the front wall and the rear wall of the wall body, and the lithium battery pack is fixed in the receiving cavity through the connecting arms; the upper cover is located at the opening of the receiving cavity, and the upper cover is fixedly connected to the tray.

[0006] Preferably, the connecting arm comprises a protruding portion and a side edge portion, the protruding portion extends along the length direction of the vehicle chassis, the side edge portions are fixed on both sides of the protruding portion, and the side edge portions are fixedly connected to the bottom plate.

[0007] Preferably, both ends are connected with connecting plates, and the connecting plates are respectively fixedly connected to the front wall and the rear wall of the wall body.

[0008] Specifically, the side edge portion and the bottom plate are fixedly connected by bolts.

[0009] Preferably, the protrusion is a hollow structural member.

[0010] Specifically, the width of the protrusion is set between 8-15 cm.

[0011] Preferably, the front and rear ends of the connecting arm are respectively in contact with the front wall and the rear wall of the wall body, and the front and rear ends of the connecting arm are respectively welded to the front wall and the rear wall.

[0012] Preferably, the plurality of connecting arms are spaced apart from each other, and the spacings between adjacent connecting arms are equal.

[0013] Preferably, a reinforcement plate is fixed at the connection between the bottom plate and the wall body, and the reinforcement plate is ring-shaped.

[0014] Preferably, a cross beam is fixed to the front side of the front wall, and the cross beam extends along the width direction of the vehicle chassis.

[0015] The beneficial effects of the utility model are:

[0016] A connecting arm extending along the length direction of the vehicle chassis is arranged in the pallet. On the one hand, the connecting arm is used to connect the lithium battery pack to fix the lithium battery pack in the pallet. On the other hand, it can also provide a relatively stable supporting force for the pallet, which is beneficial to increase the stability of the pallet structure and improve its ability to resist deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only used to illustrate the preferred embodiment and are not considered to be limiting of the present invention.

[0018] In the attached picture:

[0019] Figure 1 This is a schematic diagram of the structure of the lithium battery pack fixing structure of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the tray and connecting components in the lithium battery pack fixing structure of the utility model.

[0021] The components represented by the reference numerals are:

[0022] 1 upper cover, 2 connecting arm, 21 raised portion, 22 side edge portion, 3 reinforcing plate, 4 wall body, 5 bottom plate, 6 cross beam. DETAILED DESCRIPTION

[0023] See also Figure 1 and Figure 2 The utility model provides a lithium battery pack fixing structure, including a tray, a connecting component and an upper cover 1.

[0024] The tray is connected to the vehicle chassis, and includes a bottom plate 5 and a wall body 4 surrounding the edge of the bottom plate 5. The bottom plate 5 and the wall body 4 enclose a receiving cavity with an opening, and the receiving cavity is used to install the lithium battery pack. The wall body 4 includes a front wall and a rear wall relative to each other. Specifically, the wall body 4 further includes a front wall, a rear wall, a left wall and a right wall, and the front wall, the rear wall, the left wall and the right wall are connected in sequence, and the cross section of the tray is a quadrilateral.

[0025] The upper cover 1 is located at the opening of the accommodating cavity, and the upper cover 1 is fixedly connected to the tray. Specifically, a sealing ring is provided between the upper cover 1 and the tray, and the upper cover 1 and the tray are fixedly connected by bolts.

[0026] The connecting assembly is arranged in the accommodating cavity, and the connecting assembly includes multiple connecting arms 2. The connecting arms 2 extend along the length direction of the vehicle chassis, and the bottom of the connecting arms 2 is fixedly connected to the bottom plate 5. The front and rear ends of the connecting arms 2 are respectively fixedly connected to the front wall and the rear wall of the wall body 4. The lithium battery pack is fixed in the accommodating cavity through the connecting arms 2. The connecting arms 2 can provide a relatively stable supporting force for the pallet, which is beneficial to increase the stability of the pallet structure and improve its ability to resist deformation.

[0027] Optionally, the connecting arm 2 includes a protrusion 21 and a side edge 22, the protrusion 21 extends along the length direction of the vehicle chassis, the side edge 22 is fixed on both sides of the protrusion 21, and the side edge 22 is fixedly connected to the bottom plate 5. Optionally, the side edge 22 and the bottom plate 5 can be fixedly connected by a plurality of bolts. Specifically, the side edge 22 is provided with a plurality of connection holes distributed along its length direction, and the bolts penetrate the connection holes to be fixedly connected to the bottom plate 5.

[0028] Optionally, the side edge portion 22 may be a plate-shaped structural member, and the side edge portion 22 and the raised portion 21 are an integrated structure to reduce the difficulty of molding.

[0029] In one embodiment, the protrusion 21 is a hollow structural member, which is beneficial to reducing the weight of the vehicle body and saving materials. In addition, the width of the protrusion 21 is set between 8-15 cm, for example, the width of the protrusion 21 can be 10 cm, so that the connecting arm 2 has good support.

[0030] Optionally, the front and rear ends of the connecting arm 2 are respectively abutted against the front wall and the rear wall of the wall body 4, so that the connecting arm 2 can provide sufficient supporting force for the front and rear walls of the pallet, further improving its anti-deformation ability, and the front and rear ends of the connecting arm 2 are respectively welded to the front wall and the rear wall to ensure a firm connection between the connecting arm 2 and the pallet.

[0031] Optionally, the plurality of connecting arms 2 are spaced apart from each other, and the spacings between adjacent connecting arms 2 are equal, so that the supporting forces of the connecting arms 2 are evenly distributed in the tray.

[0032] In addition, in order to further increase the structural strength of the fixed structure, a reinforcing plate 3 is fixed at the connection between the bottom plate 5 and the wall body 4. The reinforcing plate 3 is annular and can be fixedly connected to the wall body 4 by welding.

[0033] Optionally, a crossbeam 6 is fixed to the front side of the front wall, and the crossbeam 6 extends along the width direction of the vehicle chassis. The crossbeam 6 is conducive to improving the structural strength of the fixed structure in the width direction of the bottom plate 5, thereby further improving the anti-deformation ability of the fixed structure. Optionally, the crossbeam 6 is a solid structure to increase the rigidity of the crossbeam, thereby helping to improve the anti-impact ability of the pallet.

[0034] The above are only preferred implementations of 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 lithium battery pack fixing structure, characterized in that: include: A tray connected to a vehicle chassis, the tray comprising a bottom plate (5) and a wall body (4) surrounding the edge of the bottom plate (5), a receiving cavity with an opening is formed between the bottom plate (5) and the wall body (4), the receiving cavity is used to install a lithium battery pack, and the wall body (4) comprises a front wall and a rear wall opposite to each other; A connecting assembly is arranged in the accommodating cavity, the connecting assembly comprises a plurality of connecting arms (2), the connecting arms (2) extend along the length direction of the vehicle chassis, the bottom of the connecting arms (2) is fixedly connected to the bottom plate (5), the front and rear ends of the connecting arms (2) are respectively fixedly connected to the front wall and the rear wall of the wall body (4), and the lithium battery pack is fixed in the accommodating cavity through the connecting arms (2); An upper cover (1) is located at the opening of the accommodating cavity, and the upper cover (1) is fixedly connected to the tray.

2. The lithium battery pack fixing structure according to claim 1, characterized in that: The connecting arm (2) comprises a protruding portion (21) and a side edge portion (22), wherein the protruding portion (21) extends along the length direction of the vehicle chassis, the side edge portion (22) is fixed on both sides of the protruding portion (21), and the side edge portion (22) is fixedly connected to the bottom plate (5).

3. The lithium battery pack fixing structure according to claim 2, characterized in that: The front and rear ends of the protruding portion (21) are both connected to connecting plates, and the connecting plates are respectively fixedly connected to the front wall and the rear wall of the wall body (4).

4. The lithium battery pack fixing structure according to claim 3, characterized in that: The side edge portion (22) and the bottom plate (5) are fixedly connected by bolts.

5. The lithium battery pack fixing structure according to claim 2, characterized in that: The raised portion (21) is a hollow structural member.

6. The lithium battery pack fixing structure according to claim 5, characterized in that: The width of the protrusion (21) is set between 8-15 cm.

7. The lithium battery pack fixing structure according to claim 1, characterized in that: The front and rear ends of the connecting arm (2) are respectively in contact with the front wall and the rear wall of the wall body (4), and the front and rear ends of the connecting arm (2) are respectively welded to the front wall and the rear wall.

8. The lithium battery pack fixing structure according to claim 1, characterized in that: The plurality of connecting arms (2) are spaced apart from each other, and the spacings between adjacent connecting arms (2) are equal.

9. The lithium battery pack fixing structure according to claim 1, characterized in that: A reinforcing plate (3) is fixed at the connection between the bottom plate (5) and the wall body (4), and the reinforcing plate (3) is ring-shaped.

10. The lithium battery pack fixing structure according to claim 1, characterized in that: A cross beam (6) is fixed to the front side of the front wall, and the cross beam (6) extends along the width direction of the vehicle chassis.

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