CN112952275A

CN112952275A - Battery box, battery package and electric motor car

Info

Publication number: CN112952275A
Application number: CN202110105534.0A
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: 2021-01-26
Filing date: 2021-01-26
Publication date: 2021-06-11

Abstract

The invention relates to a battery box body, a battery pack and an electric vehicle, wherein the battery box body comprises a tray for placing a battery module, the tray comprises a tray bottom and four side walls which are arranged at the bottom of the tray in a surrounding mode to form a battery module placing area, at least one side wall is of a structure with a cavity, at least one explosion-proof vent valve is installed on the inner side surface of the structure, and at least one first through hole communicated with the cavity is formed in the bottom of the tray. Compared with the prior art, the invention has the advantages of high safety and the like.

Description

Battery box, battery package and electric motor car

Technical Field

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

Background

With the current social energy crisis becoming more serious, new energy automobiles are getting more and more social attention, especially electric automobiles. The battery module is used as a main energy storage element on the electric automobile and is a key component of the electric automobile.

Fig. 1 and 2 show a currently conventional battery pack structure in which a battery module 2 is disposed inside a tray 1, and typically 1 or more explosion-proof vent valves 3 are disposed outside

side walls

111 and 112 of the tray 1. However, the above structure has the following defects: when thermal runaway occurs, a large amount of high-temperature harmful gas is generated in the battery pack suddenly, 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 is sprayed to a person with probability to cause injury, so that potential safety hazards exist.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a battery box body, a battery pack and an electric vehicle with high safety.

The purpose of the invention can be realized by the following technical scheme:

in a first aspect, the invention provides a battery box, which comprises a tray for placing a battery module, wherein the tray comprises a tray bottom and four side walls, the four side walls form a battery module placing area, the tray bottom is surrounded by the four side walls, at least one side wall is of a structure with a cavity, at least one explosion-proof vent valve is installed on the inner side surface of the structure, and at least one first through hole communicated with the cavity is formed in the tray bottom.

Further, the structure with a cavity consists of at least six faces.

Furthermore, a second through hole is formed in the outer side face opposite to the inner side face, and the position of the second through hole corresponds to the installation position of the explosion-proof ventilation valve.

Further, the size of the second through hole is larger than that of the explosion-proof air vent valve.

Furthermore, a movable baffle is correspondingly arranged at the second through hole.

Further, one set of the opposite side walls is the structure with the cavity.

Furthermore, two explosion-proof vent valves are installed on each inner side face of the group of side walls.

Furthermore, the number of the first through holes is four, and the first through holes correspond to the explosion-proof vent valves.

In a second aspect, the invention provides a battery pack, which comprises the battery box body.

In a third aspect, the present invention provides an electric vehicle provided with the battery pack as described above.

Compared with the prior art, the invention has the following beneficial effects:

1. the side wall of the tray of the battery box body is provided with a structure with a cavity, the explosion-proof vent valve is arranged on the inner side surface of the structure, and the position of the bottom of the tray, which is communicated with the cavity, is provided with the first through hole.

2. According to the invention, the outer side surface opposite to the inner side surface is provided with the second through hole, and the position of the second through hole corresponds to the mounting position of the explosion-proof vent valve, so that the explosion-proof vent valve is convenient to mount and dismount, and the portability is improved.

3. The size of the second through hole is larger than that of the explosion-proof breather valve, so that the installation convenience is further improved.

Drawings

Fig. 1 is a schematic structural diagram of a conventional battery case;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is a schematic structural diagram of a battery case according to the present invention;

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

FIG. 5 is a front view of the battery case of the present invention;

FIG. 6 is an enlarged view of FIG. 5 at C;

FIG. 7 is a schematic view of the installation of the baffle of the present invention;

in the figure, 1-tray; 2-a battery module; 3-explosion-proof ventilation valve; 4-a baffle plate; 111. 112, 113-sidewalls; 114-end face; 115-tray bottom; 116-a first via; 117-cavity; 118-lateral side; 119-medial side; 120-upper side.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the 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 otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 3 to 6, the present embodiment provides a battery box, including a tray 1 for placing a battery module 2, where the tray 1 includes a tray bottom 115 and four side walls enclosing the tray bottom 115 to form an area for placing the battery module 2, at least one of the side walls is a structure with a cavity 117, at least one explosion-proof vent valve 3 is installed on an inner side 119 of the structure, and the tray bottom 115 is provided with at least one first through hole 116 communicating with the cavity 117. The number and the positions of the first through holes 116 can be matched with those of the anti-explosion vent valves 3, and the first through holes can be arranged at any suitable positions.

In an alternative embodiment, the structure with the cavity 117 is comprised of at least six faces, the most basic of which includes an inner face 119, an outer face 118, a bottom face, an upper face 120, and two end faces 114, wherein the bottom face is integrally disposed with the tray bottom 115.

In an alternative embodiment, a second through hole is opened on the outer side 118 opposite to the inner side 119, and the position of the second through hole corresponds to the installation position of the explosion-proof ventilation valve 3. Preferably, the size of the second through hole is larger than that of the explosion-proof vent valve 3, so that the installation of the explosion-proof vent valve 3 is facilitated.

In an alternative embodiment, a movable baffle 4 is correspondingly provided at the second through hole, and is installed as shown in fig. 7.

In the use process of the battery box body, when a large amount of gas is generated due to thermal runaway of the battery cell, the pressure of the inner cavity of the battery box body is increased to the opening pressure of the explosion-proof ventilation valve, and the gas is discharged from the first through hole 116 at the bottom of the battery box body through the valve to the cavity 117.

In a preferred embodiment, one set of opposite side walls is of a structure with a cavity 117, and two explosion-proof vent valves 3 are mounted on each inner side 119 of the set of side walls. Four first through holes 116 are symmetrically arranged and correspond to the explosion-proof ventilation valve 3.

Example 2

The present embodiment provides a battery pack including a battery case as in embodiment 1, and a battery module disposed in a tray 1, as shown with reference to fig. 3.

Example 3

The present embodiment provides an electric vehicle provided with a battery pack as in embodiment 2.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a battery box, is including tray (1) that is used for placing battery module (2), its characterized in that, tray (1) include tray bottom (115) and tray bottom (115) enclose to establish and form four lateral walls that place battery module (2) region, at least one the lateral wall is for having the structure of cavity (117), installs at least one explosion-proof breather valve (3) on medial surface (119) of this structure, tray bottom (115) seted up at least one with first through-hole (116) of cavity (117) intercommunication.

2. The battery box according to claim 1, characterized in that said structure with cavities (117) consists of at least six faces.

3. The battery box body according to claim 1, wherein a second through hole is formed in an outer side surface (118) opposite to the inner side surface (119), and the position of the second through hole corresponds to the installation position of the explosion-proof breather valve (3).

4. The battery box according to claim 3, characterized in that the size of the second through hole is larger than the size of the explosion-proof breather valve (3).

5. The battery box body as claimed in claim 3, wherein the second through hole is correspondingly provided with a movable baffle (4).

6. The battery box of claim 1, wherein one set of opposing sidewalls is the structure with the cavity (117).

7. The battery box according to claim 6, characterized in that two explosion-proof breather valves (3) are mounted on each inner side (119) of said set of side walls.

8. The battery box body according to claim 7, wherein the first through holes (116) are symmetrically provided with four holes, and the four holes are arranged corresponding to the explosion-proof vent valves (3).

9. A battery pack comprising the battery case according to any one of claims 1 to 8.

10. An electric vehicle characterized in that it is provided with the battery pack according to claim 9.