CN212967936U

CN212967936U - Explosion-proof structure of battery box and battery box

Info

Publication number: CN212967936U
Application number: CN202022070652.6U
Authority: CN
Inventors: 魏艳红; 夏清松; 邓杰; 陈小源; 胡敏; 王华文; 王明旺
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-04-13
Anticipated expiration: 2030-09-18

Abstract

The application discloses an explosion-proof structure of a battery box and the battery box, wherein a first end of a hollow cylinder is fixed on the outer wall of the battery box, and a second end of the hollow cylinder is arranged in the battery box; the sealing plug is arranged in the first end of the hollow cylinder and is in sealing fit with the hollow cylinder; the pull rod comprises a rod body and a limiting part connected to one end of the rod body, and one end of the rod body, which is far away from the limiting part, is connected with the sealing plug; the bracket is fixed on the inner wall of the first side of the battery box, and is provided with a limit buckle which is matched with the limit part so as to limit the pull rod to be separated from the first end of the hollow cylinder; the connecting rod comprises a first end and a second end, and the first end and the second end of the connecting rod are respectively connected with the bracket and the inner wall of the second side of the battery box; the explosion-proof structure and the battery box of this application battery box, the explosion-proof structure of battery box use one set of mechanical structure cooperation to realize the explosion-proof effect of exhausting, and the installation of being convenient for, the reliability is high, is convenient for simultaneously inspect the operating condition of the explosion-proof structure of battery box.

Description

Explosion-proof structure of battery box and battery box

Technical Field

The utility model relates to a battery box structure, in particular to explosion-proof structure and battery box of battery box.

Background

Along with the continuous rising of the quantity of motor vehicles, the environmental pollution is more and more serious when people go out conveniently. Therefore, various countries around the world are currently working on developing electric vehicle technology.

The power battery module, the battery pack, the battery box and the like designed for the new energy automobile are generally in a battery sealing structure. The battery sealing structure is provided with an explosion-proof valve device. When the battery works normally, the explosion-proof valve device plays a role in sealing, and is waterproof and dustproof. And when the battery core in the battery sealing structure is out of control, the explosion-proof valve device can quickly release pressure to prevent the battery box from exploding. Specifically, when the gas reaches a critical explosion value, the explosion-proof valve device explodes instantly and is directly communicated with the outside, a large amount of gas is discharged, the strong pressure in the battery sealing structure is released quickly, and explosion or explosion damage is avoided or reduced.

However, the existing explosion-proof valve device has the defects of difficult type selection, easy failure and the like of the explosion-proof valve, and is difficult to check whether the explosion-proof valve device can work normally.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an explosion-proof structure and battery box of battery box aims at solving present explosion-proof valve and loses efficacy easily, and the unable problem of discerning the explosion-proof valve under the inefficacy state.

In order to achieve the above object, the utility model provides an explosion-proof structure of battery box, include:

the battery box comprises a battery box body, a hollow cylinder body and a battery box cover, wherein the battery box body is arranged in the battery box body, the hollow cylinder body comprises a first end and a second end, the first end of the hollow cylinder body is fixed on the outer wall of the battery box, and the second end of the hollow cylinder body is arranged in the battery box;

a sealing plug disposed within the first end of the hollow cylinder and in sealing engagement with the hollow cylinder;

the pull rod comprises a rod body and a limiting part connected to one end of the rod body, and one end of the rod body, which is far away from the limiting part, is connected with the sealing plug;

the support is fixed on the inner wall of the first side of the battery box, a limiting buckle is arranged on the support, and the limiting buckle is matched with the limiting part so as to limit the pull rod to move towards the first end of the hollow cylinder;

the connecting rod comprises a first end and a second end, and the first end and the second end of the connecting rod are respectively connected with the bracket and the inner wall of the second side of the battery box.

Further, a first elastic piece in a compressed state is arranged between the sealing plug and the second end of the hollow cylinder.

Further, the cavity barrel includes interconnect's first barrel and second barrel, first barrel set up in outside the battery box, the second barrel set up in the battery box.

Furthermore, the support includes first support and second support, first support is fixed in the lower inner wall of battery box, the second support connect in first support, first support with the junction formation of second support limit buckle.

Furthermore, two torsion spring holes are formed in the first support, and the second support is fixed to the torsion spring holes in the first support through bolts.

Further, a gasket is arranged between the first elastic piece and the sealing plug.

Further, the link is connected to a central position of an upper inner wall of the battery case.

Further, the connecting rod extends upwards from the support to the rear of the upper inner wall of the battery box, extends along the upper inner wall of the battery box and is connected to the center of the upper inner wall of the battery box.

A battery box comprises the explosion-proof structure of the battery box.

The explosion-proof structure and the battery box of this application battery box, the explosion-proof structure of battery box use one set of mechanical structure cooperation to realize the explosion-proof effect of exhausting, and the installation is simple, the reliability is high, is convenient for simultaneously inspect the operating condition of the explosion-proof structure of battery box.

Drawings

Fig. 1 is a schematic view illustrating an installation of an explosion-proof structure in a battery box according to an embodiment of the present invention;

fig. 2 is an overall schematic view of an explosion-proof structure of a battery box according to an embodiment of the present invention;

fig. 3 is an overall schematic view of an explosion-proof structure of a battery case according to a second embodiment of the present invention;

fig. 4 is a schematic longitudinal sectional view of an explosion-proof structure of a battery case according to a third embodiment of the present invention.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As used herein, the singular forms "a", "an", "the" and "the" include plural referents unless the content clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, units, modules, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Referring to fig. 1-2, in order to the present invention, in an embodiment, an explosion-proof structure of a battery box includes:

a hollow cylinder 110, wherein the hollow cylinder 110 includes a first end and a second end, the first end of the hollow cylinder 110 is fixed to the outer wall of the battery box 200, and the second end of the hollow cylinder 110 is disposed inside the battery box 200;

a sealing plug 140, said sealing plug 140 being disposed inside said first end of said hollow cylinder 110 and forming a sealing fit with said hollow cylinder 110;

the pull rod 120 comprises a rod body 121 and a limiting part 122 connected to one end of the rod body 121, and one end of the rod body 121, which is far away from the limiting part 122, is connected with the sealing plug 140;

the bracket 130 is fixed on the inner wall of the first side of the battery box 200, a limit buckle 133 is arranged on the bracket 130, and the limit buckle 133 is matched with the limit part 122 so as to limit the pull rod 120 to move towards the first end of the hollow cylinder 110;

a connecting rod 150, wherein the connecting rod 150 includes a first end and a second end, and the first end and the second end of the connecting rod 150 are respectively connected to the bracket 130 and a second side inner wall of the battery box 200.

In this embodiment, the battery box 200 includes an upper box 220 and a lower box 210, and when the sealing plug 140 of the explosion-proof structure 100 is located in the hollow cylinder 110, the whole battery box 200 is isolated from the external environment, so as to ensure the sealing effect. When the battery core in the battery box 200 is out of control due to heat, the upper box 220 of the battery box 200 protrudes outward due to air pressure to drive the connecting rod 150, the connecting rod 150 pulls the limit buckle 133 to deform the limit buckle 133 or pulls the bracket 130 to integrally remove the bracket 130, the limit part 122 is removed from the limit buckle 133, and the sealing plug 140 is pushed out of the hollow cylinder 110 by the air pressure; the inside and the outside of the battery box 200 are communicated, and the gas in the battery box 200 is discharged, so that the explosion-proof effect is realized. The explosion-proof structure of the battery box is composed of a set of mechanical structure, is reliable, and the working state of the battery box is convenient to confirm. The fixing manner of the bracket 130 and the connecting rod 150 on the battery box 200 may be a common manner such as a screw, a rivet, or an elastic buckle.

The inner wall of the first side of the battery box 200 and the inner wall of the second side of the battery box 200 cannot be the same side, otherwise, the connecting rod 150 cannot pull the limit buckle 133, so that the explosion-proof effect cannot be realized.

Referring to fig. 3, in one embodiment, a first resilient member 160 is disposed in a compressed state between the sealing plug 140 and the second end of the hollow cylinder 110.

When the position-limiting part 122 is separated from the position-limiting buckle 133, the elastic force of the first elastic member 160 acts on the sealing plug 140, so that the combination of the pull rod 120 and the sealing plug 140 is ejected out of the hollow cylinder 110. The first elastic member 160 assists the push-out of the coupling integrity of the pull rod 120 and the sealing plug 140, compared to the coupling integrity of the pull rod 120 and the sealing plug 140 only by air pressure.

In this embodiment, an inner convex snap ring is disposed on an inner wall of the second end of the hollow cylinder 110, and the first elastic member 160 is clamped between the inner convex snap ring and the sealing plug 140.

Referring to fig. 1, in one embodiment, the first side inner wall is a lower inner wall of the battery box 200, and the second side inner wall is an upper inner wall of the battery box 200.

The battery case 200 includes an upper case 220 and a lower case 210, the lower inner wall being an upper surface of the lower case 210, and the upper inner wall being a lower surface of the upper case 220.

Referring to fig. 2, in one embodiment, the hollow cylinder 110 includes a first cylinder 111 and a second cylinder 112 connected to each other, the first cylinder 111 is disposed outside the battery box 200, and the second cylinder 112 is disposed inside the battery box 200.

The hollow cylinder 110 is divided into a first cylinder 111 and a second cylinder 112 which are connected with each other, so that the hollow cylinder 110 is convenient to fix and install, and the daily maintenance of the explosion-proof structure 100 is also convenient. If the first cylinder 111 is removed, the state of other parts of the explosion-proof structure 100 of the battery box can be checked.

In one embodiment, the first cylinder 111 and the second cylinder 112 are connected by a screw, and the first cylinder 111 and the second cylinder 112 clamp the outer wall of the battery box 200. The first cylinder 111 and the second cylinder 112 are connected simply and quickly, and the hollow cylinder 110 is fixed on the battery box 200.

Referring to fig. 4, in one embodiment, the bracket 130 includes a first bracket 131 and a second bracket 132, the first bracket 131 is fixed to the lower inner wall of the battery box 200, the second bracket 132 is connected to the first bracket 131, and the connection portion of the first bracket 131 and the second bracket 132 forms the stopper 133.

When the battery core in the battery box 200 is out of control due to heat, the upper box body 220 of the battery box 200 protrudes outwards to drive the connecting rod 150, the connecting rod 150 pulls the second bracket 132, and the limit buckle 133 is damaged, so that the limit part 122 is separated from the limit buckle 133, and the sealing plug 140 is pushed out of the hollow cylinder 110 by pressure; so that the inside and the outside of the battery box 200 are communicated, the gas in the battery box 200 is discharged, and the explosion-proof effect is realized. The breaking of the stopper 133 is achieved by the second bracket 132 being separated from the first bracket 131 or by the deformation of the second bracket 132.

In this embodiment, the second bracket 132 is formed by molding an aluminum sheet, the deformation of the upper case 220 drives the connecting rod 150, and the connecting rod 150 pulls the second bracket 132 to break the stopper 133.

In one embodiment, the first bracket 131 is provided with two torsion spring holes, and the second bracket 132 is fixed to the torsion spring holes of the first bracket 131 by bolts.

The torsion spring hole is matched with the latch to facilitate the fixing and separating of the first bracket 131 and the second bracket 132. In this embodiment, the deformation of the upper case 220 drives the connecting rod 150, and the connecting rod 150 pulls the second bracket 132 to separate the second bracket 132 from the first bracket 131, so that the stopper 133 is damaged.

In one embodiment, the link 150 is a unitary structure with the second bracket 132.

The connecting rod 150 and the second bracket 132 are of an integral structure, and are convenient to process and install.

In one embodiment, a gasket is provided between the first resilient member 160 and the sealing plug 140.

The gasket is disposed between the first elastic member 160 and the sealing plug 140, so that the force of the first elastic member 160 does not directly act on the sealing plug 140. If the first elastic member 160 is a coil spring or a belleville spring, the area of the first elastic member 160 acting on the sealing plug 140 is relatively small, and the sealing plug 140 can be protected by the gasket.

Referring to fig. 1 and 4, in one embodiment, the link 150 is coupled to a central position of an upper inner wall of the battery case 200.

The bracket 130 is connected to the lower case 210, and the connecting rod 150 is connected to a central position of an upper inner wall of the upper case 220. Since the middle of the battery case 200 is deformed to a greater size than the outer periphery, the connection of the connecting rod 150 to the center of the upper inner wall of the battery case 200 makes the reaction of the explosion-proof structure 100 more sensitive.

Referring to fig. 1 and 4, in one embodiment, the link 150 extends upward from the bracket 130 to the rear of the upper inner wall of the battery case 200, extends along the upper inner wall of the battery case 200, and is connected to the center of the upper inner wall of the battery case 200. The shape of the connecting rod 150 can provide a larger installation space for the battery cells in the battery box 200.

Referring to fig. 1, in an embodiment of the present invention, a battery box includes the above-mentioned explosion-proof structure.

Above-mentioned battery box 200 utilizes the deformation of last box 220 to trigger explosion-proof structure, and with the setting of the explosion-proof valve of installation on the battery box among the prior art, this scheme installation is simple, the reliability is high.

The explosion-proof structure and the battery box of this application battery box, the explosion-proof structure of battery box use one set of mechanical structure cooperation to realize the explosion-proof effect of exhausting, and the installation of being convenient for, the reliability is high, is convenient for simultaneously inspect the operating condition of the explosion-proof structure of battery box.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.

Claims

1. An explosion-proof structure of a battery box, characterized in that the explosion-proof structure includes:

2. An explosion proof structure of a battery box according to claim 1, wherein a first elastic member is provided in a compressed state between the sealing plug and the second end of the hollow cylinder.

3. The explosion proof structure of battery box according to claim 2, wherein the hollow cylinder includes a first cylinder and a second cylinder that are connected to each other, the first cylinder being disposed outside the battery box, the second cylinder being disposed inside the battery box.

4. The explosion-proof structure of battery box according to claim 3, characterized in that the bracket comprises a first bracket and a second bracket, the first bracket is fixed on the lower inner wall of the battery box, the second bracket is connected to the first bracket, and the connecting part of the first bracket and the second bracket forms the limit buckle.

5. An explosion-proof structure of a battery box according to claim 4, characterized in that two torsion spring holes are provided on the first bracket, and the second bracket is fixed to the torsion spring holes on the first bracket by bolts.

6. An explosion proof structure of a battery box according to claim 2, wherein a gasket is provided between the first elastic member and the sealing plug.

7. An explosion proof structure of a battery box according to claim 1, wherein the link is connected to a central position of an upper inner wall of the battery box.

8. An explosion proof structure of battery box according to claim 7, characterized in that the connecting rod extends from the bracket to the upper inner wall of the battery box and then extends along the upper inner wall of the battery box to be connected to the center of the upper inner wall of the battery box.

9. A battery case characterized by comprising an explosion-proof structure of the battery case according to any one of claims 1 to 8.