Anti-explosion welding protection shell of lithium ion battery shell

Abstract

The utility model relates to the field of batteries, and discloses a lithium ion battery shell explosion-proof welding protection shell which comprises a protection shell body, the protection shell body is detachably arranged at the top of an outer shell body, a groove is formed in the bottom face of the protection shell body, and the top face, close to an opening, of the outer shell body is a welding face. And threaded holes are formed in the front side and the rear side of the outer wall of the protective shell correspondingly, the two threaded holes communicate with the interior of the groove correspondingly, and bolts are in threaded connection with the interiors of the two threaded holes correspondingly. According to the utility model, the cleanliness of the welding surface is protected through the protective shell and the groove, and the protective shell and the outer shell can be effectively fixed through the threaded hole and the bolt, so that the protective shell is prevented from falling off accidentally during transfer, the welding surface of the outer shell is effectively protected, and the product quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery, concretely is a lithium ion battery shell anti -explosion welding protection shell. BACKGROUND

[0002] Lithium ion battery has the advantages of high capacity density, high output voltage, low self-discharge, small memory effect and environmental friendliness compared with traditional lead-acid battery, nickel-cadmium battery, nickel-hydrogen battery and other secondary batteries, and has been widely applied and researched in recent years. The lithium ion battery is composed of a cell, the cell includes a core package, a shell and a top cover, the shell has an opening, and the top cover is arranged at the opening end of the shell to form a sealed shell, and the core package is located inside the sealed shell. In the production and manufacturing process of the lithium ion battery, the cover plate and the shell are welded together by laser welding to form a sealed cell, and during the laser welding of the cell, if the cleanliness of the surface of the shell does not meet the requirements, it will directly lead to the phenomenon of explosion welding during the welding of the cover plate of the lithium ion battery, so the protection shell is needed to protect the welding surface of the shell.

[0003] According to the patent with the announcement number CN218957873U, a lithium ion battery shell anti-explosion welding protection shell is provided, which comprises a shell, characterized in that a recess is formed on the surface of the shell to form a receiving cavity, the receiving cavity is matched with the welding surface, and the shell is detachably connected with the shell.

[0004] In the above scheme, the welding surface of the shell is covered by the receiving cavity of the protection shell, and the welding surface is protected. However, the connection between the protection shell and the shell is not firm enough, which may cause accidental falling of the protection shell during transfer, and the welding surface of the shell cannot be effectively protected, resulting in a decrease in product quality. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a lithium ion battery shell anti-explosion welding protection shell to solve the problem of insufficient connection between the protection shell and the shell, which may cause accidental falling of the protection shell during transfer, and the welding surface of the shell cannot be effectively protected, resulting in a decrease in product quality.

[0006] In order to achieve the above utility model purpose, the utility model adopts the following technical scheme: a lithium ion battery shell anti-explosion welding protection shell, comprising a protection shell body, the protection shell body is detachably arranged on the top of the shell body, the bottom surface of the protection shell body is provided with a recess, the top surface of the shell body near the opening is a welding surface, the outer wall front side and rear side of the protection shell body are respectively provided with threaded holes, the two threaded holes are respectively communicated with the inside of the recess, and bolts are respectively screwed in the two threaded holes.

[0007] Preferably, the inner wall of the groove is provided with two accommodating grooves, the two accommodating grooves are communicated with the two threaded holes respectively, and the inner parts of the two accommodating grooves are rotatably provided with rubber pads respectively.

[0008] Preferably, the bottom surface of the protective shell is fixed with a sealing ring, and the inner wall of the sealing ring is in contact with the outer wall of the outer shell.

[0009] Preferably, the inner top surface of the groove is fixed with rubber protrusions at four corners, and the bottom ends of the rubber protrusions are in contact with the welding surface respectively.

[0010] Preferably, the lengths of the rubber protrusions are all 1cm.

[0011] Preferably, the top surface of the protective shell is fixed with two lifting lugs.

[0012] Compared with the prior art, the lithium ion battery shell explosion-proof protective shell has the following beneficial effects:

[0013] I. In use, the protective shell and the groove are beneficial to the cleanliness of the welding surface, and the threaded hole and the bolt can effectively fix the protective shell and the outer shell, thereby preventing the protective shell from accidentally falling off during transfer, effectively protecting the welding surface of the outer shell, and improving the product quality.

[0014] II. In use, when the bolt is rotated and moved towards the outer wall of the outer shell, the rubber pad will move synchronously in the accommodating groove and finally tightly contact the outer wall of the outer shell, not only preventing scratches caused by direct contact of the bolt with the outer wall of the outer shell, but also increasing the friction through the rubber pad, thereby improving the stability of the protective shell and the outer shell when fixed. When the protective shell is installed on the outer shell, the inner wall of the sealing ring will tightly contact the outer wall of the outer shell, forming an effective sealing barrier, not only preventing dust, impurities and the like from entering the gap between the protective shell and the outer shell, further improving the cleanliness of the welding surface, but also increasing the friction, so that the protective shell is more stably fixed on the outer shell.

[0015] III. In use, the bottom end of the rubber bump is in close contact with the welding surface without causing scratches, on the contrary, they further reduce the possibility of scratching the welding surface by reducing the direct contact area of the groove bottom and the welding surface, not only protect the integrity of the welding surface, but also improve the practicability and durability of the protective shell. By setting the length of the rubber bump to 1 cm, this length not only ensures that the rubber bump can fully contact the welding surface, but also does not increase unnecessary material cost and weight due to excessive length, and the length of 1 cm also makes the rubber bump maintain sufficient elasticity and stability when subjected to external force, thereby better protecting the welding surface. The lifting lug facilitates the installation or disassembly of the protective shell during operation, so that the workers or mechanical equipment can more easily install the protective shell, improving work efficiency and convenience. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a perspective view of an embodiment.

[0017] Fig. 2 is an exploded view of an embodiment.

[0018] Fig. 3 is a cross-sectional view of the protective shell in an embodiment.

[0019] Fig. 4 is a bottom view of the protective shell in an embodiment.

[0020] In the figure: 1, protective shell; 2, outer shell; 201, welding surface; 3, groove; 4, threaded hole; 5, bolt; 6, containing groove; 7, rubber pad; 8, sealing ring; 9, rubber bump; 10, lifting lug. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0022] As Figs. 1-4 shown, a lithium ion battery shell anti-explosion welding protective shell, including protective shell 1, the protective shell 1 is detachably arranged on the top of the outer shell 2, the bottom surface of the protective shell 1 is provided with a groove 3, the protective shell 1 is a hollow structure, the top surface of the outer shell 2 near the opening is a welding surface 201, the outer wall of the protective shell 1 is provided with a threaded hole 4 on the front side and the back side respectively, two threaded holes 4 are respectively communicated with the inside of the groove 3, and two threaded holes 4 are respectively screwed with bolts 5.

[0023] In use, when the workers need to protect the cleanliness of the welding surface 201 on the outer shell 2, they only need to cover the protective shell 1 on the top of the outer shell 2, at this time the groove 3 opened on the bottom surface of the protective shell 1 will cover the welding surface 201 of the outer shell 2, then the workers rotate the bolts 5 installed on the front side and the rear side of the outer wall of the protective shell 1, the bolts 5 are deeply into the inside of the groove 3 through the threaded holes 4, and are in close contact with the outer shell 2, so as to firmly fix the protective shell 1 on the outer shell 2. Before the outer shell 2 is welded with the cover plate, the workers can take off the protective shell 1. This design not only effectively protects the cleanliness of the welding surface 201, prevents the accumulation of particulate impurities such as dust and dirt at the shell opening, thereby reducing the risk of explosion welding when the cover plate is welded, but also significantly improves the production efficiency of the lithium ion battery and the qualification rate of the product. At the same time, due to the reduction of the scrap rate caused by explosion welding, the manufacturing cost is also effectively reduced.

[0024] The protective shell 1 and the groove 3 are beneficial to protect the cleanliness of the welding surface 201, and the threaded holes 4 and the bolts 5 can effectively fix the protective shell 1 and the outer shell 2, thereby preventing the protective shell 1 from accidentally falling off during transfer, effectively protecting the welding surface 201 of the outer shell 2, and improving the product quality.

[0025] As shown in Figs. 1-4 , the inner wall of the groove 3 is provided with two accommodating grooves 6, and the two accommodating grooves 6 are respectively communicated with the two threaded holes 4. The inner part of the two accommodating grooves 6 is respectively provided with a rubber pad 7 which is rotatable. The outer side of the two rubber pads 7 is respectively fixedly connected with one end of the two bolts 5.

[0026] In use, when the bolts 5 are rotated and moved towards the outer wall of the outer shell 2, the rubber pads 7 will move synchronously in the accommodating grooves 6 and finally come into close contact with the outer wall of the outer shell 2. Not only is the scratch caused by the direct contact between the bolts 5 and the outer wall of the outer shell 2 prevented, but also the stability of the fixing of the protective shell 1 and the outer shell 2 is improved by increasing the friction through the rubber pads 7.

[0027] As shown in Figs. 1-4 , the bottom surface of the protective shell 1 is fixedly provided with a sealing ring 8, and the inner wall of the sealing ring 8 is in contact with the outer wall of the outer shell 2. The inner top surface of the groove 3 is fixedly provided with rubber protrusions 9 at four corners. The bottom ends of the rubber protrusions 9 are respectively in contact with the welding surface 201.

[0028] In use, when the protective shell 1 is installed on the outer shell 2, the inner wall of the sealing ring 8 is in close contact with the outer wall of the outer shell 2, forming an effective sealing barrier, not only preventing dust, impurities and the like from entering the gap between the protective shell 1 and the outer shell 2, further improving the cleanliness of the welding surface 201, but also by increasing the friction, the protective shell 1 is more firmly fixed on the outer shell 2. At the same time, the bottom end of the rubber bump 9 is in close contact with the welding surface 201, but it will not scratch it, on the contrary, by reducing the direct contact area between the bottom of the groove 3 and the welding surface 201, it further reduces the possibility of scratching the welding surface 201, not only protects the integrity of the welding surface 201, but also improves the practicability and durability of the protective shell 1.

[0029] As shown in Figs. 1-4 several rubber bumps 9, the length of each rubber bump 9 is 1cm, and the top surface of the protective shell 1 is fixed with two lifting lugs 10.

[0030] In use, by setting the length of the rubber bump 9 to 1cm, this length not only ensures that the rubber bump 9 can fully contact the welding surface 201, but also will not increase unnecessary material cost and weight due to being too long, and the length of 1cm also makes the rubber bump 9 maintain sufficient elasticity and stability when subjected to external force, thereby better protecting the welding surface 201. Through the lifting lug 10, the protective shell 1 can be easily installed or disassembled during operation, so that the staff or mechanical equipment can more easily install the protective shell 1, improving work efficiency and convenience.

[0031] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A lithium ion battery case explosion-proof protective shell, comprising a protective shell body (1), the protective shell body (1) is detachably arranged on the top of an outer shell body (2), characterized in that, The bottom surface of the protective shell (1) is provided with a groove (3), the top surface of the outer shell (2) near the opening is a welding surface (201), the front side and the back side of the outer wall of the protective shell (1) are respectively provided with threaded holes (4), the two threaded holes (4) are respectively connected with the inside of the groove (3), and the two threaded holes (4) are respectively screwed with bolts (5).

2. The explosion-proof protective shell for lithium-ion battery shell welding according to claim 1, characterized in that: The inner wall of the groove (3) is provided with two accommodating grooves (6), the two accommodating grooves (6) are respectively connected with the two threaded holes (4), and the inner part of the two accommodating grooves (6) is respectively provided with a rubber pad (7) which can rotate.

3. The explosion-proof protective shell for lithium-ion battery shell welding according to claim 2, characterized in that: The bottom surface of the protective shell (1) is fixedly connected with a sealing ring (8), and the inner wall of the sealing ring (8) is in contact with the outer wall of the outer shell (2).

4. The explosion-proof protective shell for lithium-ion battery shell welding according to claim 1, characterized in that: The inner top surface of the groove (3) is fixedly connected with rubber protrusions (9) at four corners.

5. The explosion-proof protective shell for lithium-ion battery shell welding according to claim 4, characterized in that: The length of the rubber protrusions (9) is 1cm.

6. The explosion-proof protective shell for lithium-ion battery shell welding according to claim 1, characterized in that: The top surface of the protective shell (1) is fixedly connected with two lifting lugs (10).

Images