CN219832932U

CN219832932U - Explosion-proof assembly

Info

Publication number: CN219832932U
Application number: CN202320206871.3U
Authority: CN
Inventors: 蒋世用; 徐德雷; 贺智祺; 李聪利; 李海军
Original assignee: Gree Altairnano New Energy Inc
Current assignee: Gree Altairnano New Energy Inc
Priority date: 2023-02-14
Filing date: 2023-02-14
Publication date: 2023-10-13
Anticipated expiration: 2033-02-14

Abstract

The utility model discloses an explosion-proof assembly, which comprises an explosion-proof boss and an explosion-proof valve, wherein the explosion-proof boss and the explosion-proof valve are arranged on a battery cover plate, the explosion-proof boss forms a groove on the back surface of the battery cover plate, and the explosion-proof valve is accommodated in the groove. According to the explosion-proof assembly, the explosion-proof valve is arranged in the groove, so that the explosion-proof valve bottom is prevented from being knocked in the actual manufacturing, transporting and carrying processes, the explosion part of the explosion-proof valve is prevented from being damaged, the explosion-proof valve is prevented from losing the service performance, the internal space of the battery is increased, and more electrolyte can be contained.

Description

Explosion-proof assembly

Technical Field

The utility model belongs to the field of battery safety, and particularly relates to an explosion-proof assembly.

Background

The power battery is a heart of a new energy automobile, is used as a core component for control and driving, and has the advantages of safety, stable work and reliability, and directly responds to the service performance and safety of equipment or a new energy electric automobile. When water enters the controller box body, the insulation performance is reduced to cause short circuit and control system failure; if the water entering the battery pack can cause short circuit of the battery and further cause explosion of the battery, in order to prevent the performance of the battery pack or components in the electric control box from being influenced by water, dust and the like, the box body of the outdoor electric appliance control box, the battery pack and the like are required to be sealed, and the waterproof and dustproof protection level of the box body is required to reach above the national standard GB4208-2008 (Shell protection level) (IP code) IP 67.

However, under the condition of complete sealing, the electric element can generate heat during operation, so that the air in the box body expands due to temperature rise, if the air cannot be timely discharged, the pressure in the box body is continuously increased, the box body is deformed, the rubber sealing element is invalid, the waterproof and dustproof grades of the box body are reduced, the electronic and electric element is damaged, and the like.

The strength of explosion-proof valve and apron welded part is often improved to the strengthening rib that can add around explosion-proof through-hole to current power battery, but still offer ventilative groove on the strengthening rib when adding to establish the strengthening rib, thereby avoid explosion-proof valve protection pad pasting to damage the battery outward appearance because inside and outside pressure is inconsistent when toasting in the vacuum, because ventilative groove's existence, thereby electrode liquid can permeate explosion-proof valve department through ventilative groove when annotating the liquid corroding explosion-proof valve, and owing to pasted explosion-proof valve protection film, still be unfavorable for clearing away the electrolyte that permeates explosion-proof valve department.

Disclosure of Invention

The utility model provides an explosion-proof assembly, which aims to solve the technical problem that the vent groove of an explosion-proof valve can cause damage and corrosion of the explosion-proof valve in the background art.

In order to achieve the above purpose, the specific technical scheme of the explosion-proof assembly of the utility model is as follows:

an explosion-proof assembly comprises an explosion-proof boss and an explosion-proof valve, wherein the explosion-proof boss and the explosion-proof valve are arranged on a battery cover plate, the explosion-proof boss forms a groove on the back surface of the battery cover plate, and the explosion-proof valve is accommodated in the groove.

Further, an explosion-proof through hole is formed in the explosion-proof boss, and an explosion-proof valve cover is arranged on the explosion-proof through hole.

Further, the explosion-proof valve comprises a welding part positioned on the outer ring, and the welding part is welded and fixed with the battery cover plate.

Further, the edge of the explosion-proof through hole is provided with a containing groove which is arranged in a surrounding mode, and the welding part is embedded in the containing groove.

Further, the inner ring of the welding part is formed with a supporting part which is gradually far away from the battery cover plate along with the approaching of the center so as to form a convex conical surface.

Further, the center of the supporting part is provided with a detachable blasting part, and the blasting part is arranged corresponding to the explosion-proof through hole.

Further, the blasting portion is arc-shaped, and the distance between the blasting portion and the battery cover plate is gradually reduced along with the approach of the blasting portion to the center.

Further, the joint of the supporting part and the blasting part is provided with a notch.

Further, the battery cover plate is provided with a liquid injection hole, so that the explosion-proof boss is higher than the liquid injection hole.

Further, the top of the explosion-proof boss is provided with a coding space for a laser to code so as to form a battery traceability code.

The explosion-proof assembly of the utility model has the following advantages:

1. the explosion-proof valve is arranged in the groove, so that the explosion-proof valve bottom is prevented from being knocked in the actual manufacturing, transporting and carrying processes, the explosion part of the explosion-proof valve is prevented from being damaged, the explosion-proof valve is prevented from losing the service performance, the internal space of the battery is increased, and more electrolyte can be contained;

2. a boss higher than the liquid injection hole is formed, and meanwhile, a ventilation groove is not formed at the explosion-proof through hole, so that electrolyte is prevented from flowing into the explosion-proof through hole to corrode the explosion-proof valve in the liquid injection process.

Drawings

FIG. 1 is an exploded view of an explosion proof assembly of the present utility model;

FIG. 2 is a cross-sectional view of a battery cover plate of the present utility model;

FIG. 3 is a schematic view of the explosion-proof valve structure of the present utility model;

fig. 4 is a cross-sectional view of an explosion proof assembly of the present utility model.

The figure indicates:

1. a battery cover plate; 11. explosion-proof boss; 12. a groove; 13. an explosion-proof through hole; 14. a receiving groove; 15. a liquid injection hole; 2. an explosion-proof valve; 21. a fusion joint; 22. a support part; 23. and a blasting part.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; 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 utility model will be understood in specific cases by those of ordinary skill in the art. In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Those skilled in the art will appreciate that while some embodiments herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the utility model and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

As shown in fig. 1 to 4, the explosion-proof assembly of the present utility model comprises an explosion-proof boss 11 and an explosion-proof valve 2 provided on a battery cover plate 1, the explosion-proof boss 11 forming a groove 12 on the back surface of the battery cover plate 1 so that the wall thickness of the whole battery cover plate 1 is kept uniform. The explosion proof valve 2 is accommodated in the recess 12 to protect the explosion proof valve 2. The explosion-proof boss 11 can be square or round, and the explosion-proof valve 2 can be completely contained. The receiving means that the depth of the groove 12 on the back surface of the explosion-proof boss 11 is required to be larger than the height of the explosion-proof valve 2, so that the explosion-proof valve 2 is protected.

Specifically, the explosion-proof boss 11 is provided with an explosion-proof through hole 13, the explosion-proof valve 2 is a sheet body and is covered on the explosion-proof through hole 13, so that when the pressure in the battery is overlarge, the explosion-proof valve 2 is opened, and the redundant pressure is discharged from the explosion-proof through hole 13.

And the battery cover plate 1 is also provided with a liquid injection hole 15, and the explosion-proof boss 11 protrudes out of the battery cover plate 1, so that the explosion-proof boss 11 is higher than the liquid injection hole 15, and meanwhile, a ventilation groove is not arranged at the explosion-proof through hole 13, so that electrolyte is prevented from flowing into the explosion-proof through hole 13 to corrode the explosion-proof valve in the liquid injection process.

The explosion-proof valve 2 includes a welding portion 21 located at the outer ring, and the welding portion 21 is used for welding and fixing with the battery cover plate 1, thereby fixing the explosion-proof valve 2 on the battery cover plate 1. The inner ring of the welding portion 21 is formed with a supporting portion 22, and the supporting portion 22 is gradually separated from the battery cover plate 1 as approaching the center, thereby forming a convex conical surface. The center of the supporting part 22 is provided with a detachable blasting part 23, and the blasting part 23 is arranged corresponding to the explosion-proof through hole 13. When the pressure in the battery is too high, the explosion part 23 is separated from the supporting part 22, so that the excessive pressure is discharged from the explosion-proof through hole 13, and the whole battery is prevented from being exploded to cause greater damage. And the blasting portion 23 is arc-shaped, and the distance between the blasting portion 23 and the battery cover plate 1 gradually decreases along with the approach of the center. The junction of the support portion 22 and the burst portion 23 is provided with a score which forms a weakened area to facilitate separation of the burst portion 23.

The explosion-proof through hole 13 is formed with a receiving groove 14 formed around the edge thereof, and a welding portion 21 is embedded in the receiving groove 14 and is fixed by laser welding.

Thus, the explosion-proof valve 2 is accommodated in the groove 12, and in the actual transportation and carrying process, the bottom of the explosion-proof valve 2 is prevented from being knocked, and further the explosion part 23 of the explosion-proof valve 2 is prevented from being damaged, so that the explosion-proof valve 22 cannot lose the service performance. And the explosion-proof boss 11 is higher than the surface of the battery cover plate 1 and is not provided with a ventilation groove, so that electrolyte cannot permeate into the explosion-proof valve 2 even if the electrolyte leaks out in the process of filling the electrolyte. On the other hand, the blank area at the top of the explosion-proof boss 11 can provide a coding area for the laser machine to form a battery traceability code, so that battery management is facilitated.

It will be understood that the utility model has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims

1. The explosion-proof assembly is characterized by comprising an explosion-proof boss and an explosion-proof valve, wherein the explosion-proof boss and the explosion-proof valve are arranged on a battery cover plate, the explosion-proof boss forms a groove on the back surface of the battery cover plate, and the explosion-proof valve is accommodated in the groove; the explosion-proof boss is provided with an explosion-proof through hole, and the explosion-proof valve cover is arranged on the explosion-proof through hole; the battery cover plate is provided with a liquid injection hole, so that the explosion-proof boss is higher than the liquid injection hole.

2. The explosion proof assembly of claim 1, wherein the explosion proof valve comprises a weld located on the outer ring, the weld being welded to the battery cover.

3. The explosion-proof assembly according to claim 2, wherein the edge of the explosion-proof through hole is formed with a receiving groove arranged in a surrounding manner, and the welding part is embedded in the receiving groove.

4. The explosion-proof assembly according to claim 2, wherein the inner ring of the welding portion is formed with a supporting portion gradually away from the battery cover plate as approaching the center so as to form a convex tapered surface.

5. The explosion-proof assembly according to claim 4, wherein the support portion is centrally provided with a detachable explosion portion, and the explosion portion is disposed in correspondence with the explosion-proof through hole.

6. The explosion proof assembly of claim 5, wherein the explosion portion is arcuate and tapers with distance from the battery cover plate near the center.

7. The explosion proof assembly of claim 5, wherein the support portion and the burst portion interface is provided with a score.

8. The explosion proof assembly of claim 1, wherein a coding space is provided at the top of the explosion proof boss for a laser to code to form a battery traceability code.