CN112751131B

CN112751131B - Novel battery box structure, battery pack and electric vehicle

Info

Publication number: CN112751131B
Application number: CN202110084796.3A
Authority: CN
Inventors: 张五堂
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2024-04-19
Anticipated expiration: 2041-01-22
Also published as: CN112751131A

Abstract

The invention relates to a novel battery box structure, a battery pack and an electric vehicle, wherein the novel battery box structure comprises a tray, a battery module is arranged in the tray, an opening is formed in the surface of the outer bottom of the tray, a mounting hole is formed in the surface of the inner bottom of the tray, the tray is connected with an explosion-proof valve assembly through the mounting hole, the mounting hole and the opening are arranged in a staggered mode and are communicated with each other, and meanwhile the novel battery box structure-based battery pack and the electric vehicle based on the battery pack are also provided. Compared with the prior art, the invention has the advantages of changing the exhaust direction, reducing the harm to people caused by the emission of harmful gas generated by the thermal runaway of the battery cell, and the like.

Description

Novel battery box structure, battery pack and electric vehicle

Technical Field

The invention relates to the technical field of power batteries, in particular to a novel battery box structure, a battery pack and an electric vehicle.

Background

As shown in fig. 1 and 2, which are conventional battery packs, the module 2 is disposed inside the tray 1, and typically, 1 or more explosion-proof air-permeable valves are disposed outside the side walls of the tray 1.

When thermal runaway occurs, a large amount of high-temperature harmful gas is rapidly generated in the battery pack, and when the pressure reaches the opening pressure of the explosion-proof ventilation valve, the valve is opened, and the gas is discharged from the valve; because the explosion-proof ventilation valve is arranged on the outer side, gas can be sprayed out from the side face of the battery pack, and the gas can be sprayed to the human body with probability to cause injury.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a novel battery box structure, a battery pack and an electric vehicle.

The aim of the invention can be achieved by the following technical scheme:

The utility model provides a novel battery box structure, includes the tray, be equipped with the battery module in the tray, tray outer bottom surface is equipped with the trompil, tray inner bottom surface is equipped with the mounting hole, pass through in the tray the mounting hole is connected with explosion-proof valve subassembly, the mounting hole with the trompil dislocation set and intercommunication each other.

Further, the tray is composed of a bottom plate, a first side wall and a second side wall.

Further, the opening is arranged on the bottom plate.

Further, the explosion-proof valve assembly comprises an explosion-proof valve mounting bracket, an explosion-proof valve and a sealing piece, wherein the explosion-proof valve is arranged between the explosion-proof valve mounting bracket and the sealing piece, and is integrally combined and then arranged on the mounting hole.

Further, the explosion-proof valve mounting bracket comprises a sealing flange surface, a vertical surface is arranged on the sealing flange surface in a laminated mode, and the top of the vertical surface comprises an explosion-proof ventilation valve mounting surface.

Further, a flange surface mounting hole is formed in the sealing flange surface.

Further, the explosion-proof ventilation valve mounting surface is provided with a mounting surface mounting hole.

Further, the surface shape of the explosion-proof ventilation valve mounting surface is round or square.

The invention also provides a battery box which comprises the novel battery box structure.

The invention also provides an electric vehicle, which comprises the battery box.

Compared with the prior art, the invention has the following advantages:

(1) Through the position design to the explosion-proof ventilation valve in the battery package, change the exhaust direction, make the harmful gas emission that electricity core thermal runaway produced reduce the injury to the people.

(2) The explosion-proof valve assembly comprises an explosion-proof valve mounting bracket, an explosion-proof valve and a sealing piece, wherein the explosion-proof valve is arranged between the explosion-proof valve mounting bracket and the sealing piece, and is arranged on a mounting hole after being integrally combined, so that the explosion-proof valve assembly is simple and convenient to mount, maintain and replace, and is simple and convenient to operate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a conventional battery pack;

FIG. 2 is a partially enlarged schematic view of a conventional battery pack;

FIG. 3 is a schematic diagram of the front structure of the novel battery case structure of the present invention;

FIG. 4 is a schematic view of the back structure of the novel battery case structure of the present invention;

FIG. 5 is a schematic view of a partially enlarged structure of the novel battery case structure of the present invention;

FIG. 6 is a schematic view of an embodiment of a first explosion-proof valve mounting bracket in a novel battery box structure according to the present invention;

FIG. 7 is a schematic view of a second embodiment of an explosion-proof valve mounting bracket in a novel battery box structure of the present invention;

In the figure, 1 is a tray, 111 is a first side wall, 112 is a second side wall, 113 is a bottom plate, 114 is an opening, 115 is a mounting hole, 2 is a battery module, 3 is an explosion-proof valve assembly, 31 is an explosion-proof valve mounting bracket, 311 is an explosion-proof vent valve mounting surface, 312 is a mounting surface mounting hole, 313 is a vertical surface, 314 is a flange surface mounting hole, 315 is a sealing flange surface, 32 is an explosion-proof valve, and 33 is a sealing member.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Example 1

Fig. 3, 4, 5, 6 and 7 show the concept of the design of the present invention, in which the battery module 2 is arranged on the tray 1, the first and second side walls 111 and 112 and the bottom plate 113 on the tray 1 are formed as a cavity structure composed of at least five surfaces, and the explosion-proof (ventilation) valve assembly 3 is mounted on the bottom plate 113; and the outer bottom of the tray 1 is provided with an opening 114, the bottom plate 113 is provided with an explosion-proof valve assembly 3 mounting hole 115, the mounting hole 115 and the opening 114 on the outer bottom are communicated together by a cavity formed by the bottom plate 113, the first side wall 111 and the second side wall 112, and the number of the openings 114 can be 1 or a plurality according to the positions and the number of the explosion-proof ventilation valves. Wherein the openings 114 and mounting holes 115 are generally not directly opposite each other with a certain misalignment, as is the case with the relative positions shown in fig. 4.

Fig. 5 shows the basic components of the explosion-proof valve assembly 3, which comprises an explosion-proof valve mounting bracket 31, an explosion-proof (venting) valve 32 and a sealing member 33; wherein the explosion-proof valve mounting bracket 31 can be designed in different shapes according to the explosion-proof (venting) valve 32 and the mounting area, fig. 6 and 7 are two different case shapes, and the basic features include an explosion-proof venting valve mounting surface 311, a mounting surface mounting hole 312, a vertical surface 313, a sealing flange surface 315 and a flange surface mounting hole 314 of the explosion-proof valve mounting bracket 31. The explosion-proof (vent) valve 32 is first mounted on the explosion-proof valve mounting bracket 31, and then mounted on the mounting hole 115 together with the seal 33.

Example 2

Fig. 7 shows another shape design of the explosion-proof valve mounting bracket 31.

The specific implementation operation principle of the invention is as follows:

When the battery cell is out of control and generates a large amount of gas, the pressure in the inner cavity of the battery box is increased to the opening pressure of the explosion-proof ventilation valve, the gas passes through the valve and into the cavity structure, and is discharged from the opening 114 through the cavity, and the gas is discharged to the ground because the hole is arranged at the bottom of the battery box; the position of the explosion-proof valve is well misplaced with the opening 114, so that the explosion-proof valve can be prevented from being damaged by foreign matters, and the explosion-proof valve can be directly opposite to the opening, and a protective net is suggested to be added.

While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. The novel battery box structure is characterized by comprising a tray (1), wherein a battery module (2) is arranged in the tray (1), an opening (114) for discharging gas generated by thermal runaway of an electric core is formed in the surface of the outer bottom of the tray (1), a mounting hole (115) is formed in the inner bottom surface of the tray (1), the tray (1) is internally connected with an explosion-proof valve assembly (3) through the mounting hole (115), and the mounting hole (115) and the opening (114) are arranged in a staggered mode and communicated with each other;

The tray (1) consists of a bottom plate (113), a first side wall (111) and a second side wall (112), and the opening (114) is arranged on the bottom plate (113);

The explosion-proof valve assembly (3) comprises an explosion-proof valve mounting bracket (31), an explosion-proof valve (32) and a sealing piece (33), wherein the explosion-proof valve (32) is arranged between the explosion-proof valve mounting bracket (31) and the sealing piece (33), and is integrally combined and then arranged on the mounting hole (115).

2. The novel battery box structure according to claim 1, wherein the explosion-proof valve mounting bracket (31) comprises a sealing flange surface (315), a vertical surface (313) is arranged on the sealing flange surface (315) in a stacked mode, and the top of the vertical surface (313) comprises an explosion-proof ventilation valve mounting surface (311).

3. The novel battery box structure according to claim 2, wherein the sealing flange surface (315) is provided with a flange surface mounting hole (314).

4. The novel battery box structure according to claim 2, wherein the explosion-proof ventilation valve mounting surface (311) is provided with a mounting surface mounting hole (312).

5. The novel battery box structure according to claim 2, wherein the surface shape of the explosion-proof ventilation valve mounting surface (311) is round or square.

6. A battery box characterized by comprising a novel battery box structure according to any one of claims 1 to 5.

7. An electric vehicle comprising a battery compartment as claimed in claim 6.