Blade battery case with anti-explosion valve structure

Abstract

The utility model discloses a kind of blade battery shell with explosion-proof valve structure, comprising: shell, the side wall of shell is through with explosion-proof mounting hole, the edge of explosion-proof mounting hole includes lap joint ring and outer convex ring, explosion-proof mounting hole is formed on the inner wall of lap joint ring, outer convex ring is protrudingly arranged in the side wall of shell, the connecting portion between lap joint ring and outer convex ring is formed with cooperation site, cooperation site is higher than the side wall of shell;Explosion-proof valve, explosion-proof valve includes valve body and skirt ring extending along the edge of valve body, annular recessed notch is set on the top surface of valve body, skirt ring is at least partially inserted with cooperation site and is welded fixed.The utility model discloses a kind of blade battery shell with explosion-proof valve structure, the anti-deformation performance of explosion-proof mounting hole is better, prevent external force impact from leading to explosion-proof mounting hole deformation or tear, ensure the accuracy and stability of explosion-proof valve installation, avoid the risk that explosion-proof valve falls into the blade shell due to improper assembly.

Description

Technical Field

[0001] This utility model relates to the field of battery accessory technology, and in particular to a blade battery casing with an explosion-proof valve structure. Background Technology

[0002] Lithium-ion batteries are characterized by their small size, light weight, high capacity, lack of memory effect, and environmental friendliness, and are widely used in industrial production and daily life. A lithium-ion battery consists of a casing, a cover, and a cell. The cell is housed within an enclosure formed by the casing and cover. To ensure the safe operation of the lithium battery, an explosion-proof valve is typically installed on the casing. In current technology, most explosion-proof valves are manufactured using welding. An explosion-proof mounting hole is first machined into the casing, and then the explosion-proof valve is installed from the inside out into the hole and welded. Especially in blade batteries, the explosion-proof mounting hole is usually located on the narrow edge of the blade casing. The blade casing is relatively thin, and the presence of the explosion-proof mounting hole on the narrow edge reduces its resistance to deformation. This makes the explosion-proof mounting hole prone to deformation or even tearing when the blade casing is subjected to external impact. This makes accurate positioning of the explosion-proof valve within the mounting hole difficult, and the valve can easily fall into the blade casing. Utility Model Content

[0003] The purpose of this utility model is to design a blade battery housing with an explosion-proof valve structure to overcome the shortcomings of the above-mentioned technology. The explosion-proof mounting hole has good anti-deformation performance, preventing external impact from causing deformation or tearing of the explosion-proof mounting hole, ensuring the accuracy and stability of the explosion-proof valve installation, and avoiding the risk of the explosion-proof valve falling into the blade housing due to improper assembly.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a blade battery casing with an explosion-proof valve structure, comprising:

[0005] The housing has an explosion-proof mounting hole through its side wall. The edge of the explosion-proof mounting hole includes an overlapping ring and an outwardly protruding ring arranged sequentially from the inside to the outside. The explosion-proof mounting hole is formed on the inner wall of the overlapping ring. The outwardly protruding ring protrudes from the side wall of the housing. A mating position is formed at the connection between the overlapping ring and the outwardly protruding ring. The mating position is higher than the side wall of the housing.

[0006] An explosion-proof valve includes a valve body and a skirt ring extending along the edge of the valve body. An annular recessed groove is formed on the top surface of the valve body. The recessed groove and the skirt ring are shaped to fit together. The skirt ring is at least partially fitted with the mating part and welded to it.

[0007] Preferably, the mating position is an upward-facing stepped cavity, and the skirt ring is at least partially inserted into and welded to the mating position.

[0008] Preferably, the thickness of the skirt ring is greater than the thickness of the valve body, the bottom surface of the skirt ring is on the same plane as the bottom surface of the valve body, and the top surface of the skirt ring is higher than the top surface of the valve body.

[0009] Preferably, the top surface of the overlapping ring is provided with a mating groove, such that the depth of the mating position is the same as the thickness of the skirt ring.

[0010] Preferably, the recessed grooves are spaced apart from the skirt ring.

[0011] Preferably, the thickness of the outer convex ring is less than or equal to the thickness of the shell.

[0012] Preferably, the thickness of the overlapping ring is greater than or equal to the thickness of the shell.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The edge of the explosion-proof mounting hole includes an overlapping ring and an outer protruding ring arranged sequentially from the inside to the outside. The connection between the overlapping ring and the outer protruding ring forms a mating position. The outer protruding ring protrudes from the side wall of the housing. The inner wall of the overlapping ring forms the explosion-proof mounting hole. The explosion-proof mounting hole has good resistance to deformation, preventing external impact from causing deformation or tearing of the explosion-proof mounting hole. Furthermore, the explosion-proof valve is correctly positioned on the housing and welded to be fixed by the skirt ring and the mating position, ensuring the accuracy and stability of the explosion-proof valve installation and avoiding the risk of the explosion-proof valve falling into the blade housing due to improper assembly. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the blade battery casing in Embodiment 1.

[0016] Figure 2 This is a cross-sectional view of the blade battery casing in Embodiment 1.

[0017] Figure 3 This is a schematic diagram of the explosion-proof mounting hole in Embodiment 1.

[0018] Figure 4 This is a schematic diagram of the explosion-proof valve in Example 1.

[0019] Figure 5 This is a cross-sectional view of the blade battery casing in Embodiment 2.

[0020] In the figure: 1. Housing; 101. Explosion-proof mounting hole; 102. Overlap ring; 103. Outer protruding ring; 104. Mating position; 105. Mating groove; 2. Explosion-proof valve; 21. Valve body; 22. Skirt ring; 201. Recessed groove. Detailed Implementation

[0021] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0022] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 A blade battery casing with an explosion-proof valve structure includes a casing 1 and an explosion-proof valve 2. The casing 1 is a hollow square shell structure. An explosion-proof mounting hole 101 is formed by punching through the side wall of the casing 1. The edge of the explosion-proof mounting hole 101 includes an overlapping ring 102 and an outer protruding ring 103 arranged sequentially from the inside to the outside. The casing 1, the overlapping ring 102, and the outer protruding ring 103 are integrally formed. The explosion-proof mounting hole 101 is formed on the inner wall of the overlapping ring 102. The inner ring portion of the outer protruding ring 103 is formed by a convex-embossing process. After the stamping, punching, and shaping processes, an overlapping ring 102 is formed. A mating position 104 is formed at the connection between the overlapping ring 102 and the outer protruding ring 103. The mating position 104 is an upward-facing stepped cavity. The outer protruding ring 103 protrudes from the side wall of the housing 1. The thickness of the outer protruding ring 103 is less than or equal to the thickness of the housing 1, while the thickness of the overlapping ring 102 is greater than or equal to the thickness of the housing 1. For example, if the thickness of the housing 1 is 0.4 mm, the thickness of the outer protruding ring 103 is 0.38 mm, and the thickness of the overlapping ring 102 is 0.42 mm. The overlapping ring 102 and the outer protruding ring 103 provide good resistance to deformation of the explosion-proof mounting hole 101, preventing deformation or tearing of the explosion-proof mounting hole 101 due to external impact.

[0023] The explosion-proof valve 2 has an elliptical plate-shaped structure. It includes a valve body 21 and a skirt ring 22 extending along the edge of the valve body 21. The thickness of the skirt ring 22 is greater than the thickness of the valve body 21. The bottom surface of the skirt ring 22 is on the same plane as the bottom surface of the valve body 21, and the top surface of the skirt ring 22 is higher than the top surface of the valve body 21. An annular recessed groove 201 is formed on the top surface of the valve body 21. The recessed groove 201 and the skirt ring 22 are shaped to fit together, and the recessed groove 201 and the skirt ring 22 are spaced apart.

[0024] The skirt ring 22 is at least partially inserted into and welded to the mating position 104. The explosion-proof valve 2 is positioned correctly on the housing 1 by the insertion of the skirt ring 22 into the mating position 104 and then welded to ensure the accuracy and stability of the installation of the explosion-proof valve 2. Since the explosion-proof valve 2 is assembled by placing it on the housing 1, the assembly is more convenient and avoids the risk of the explosion-proof valve 2 falling into the blade housing 1 due to improper assembly. In addition, the mating position 104 is higher than the side wall of the housing 1, so that after the explosion-proof valve 2 is assembled, it is not easy to interfere with the subsequent assembly process of the housing 1 and the battery cell.

[0025] Preferably, the top surface of the overlapping ring 102 is provided with a mating groove 105, such that the depth of the mating position 104 is the same as the thickness of the skirt ring 22. When the skirt ring 22 is inserted into the mating position 104, the mating position 104 and the bottom edge of the skirt ring 22 abut against each other, and the bottom inner wall of the mating groove 105 is on the same plane as the top surface of the skirt ring 22. The mating groove 105 is used to increase the weld width and weld depth between the skirt ring 22 and the outer convex ring 103, thereby increasing the reliability of ensuring the welding and fixing of the explosion-proof valve 2 and the shell 1.

[0026] Example 2:

[0027] refer to Figure 5 In another embodiment, the explosion-proof mounting hole 101 is formed by the inner ring portion of the outer convex ring 103 through a convex ring forming process, a punching process, and a shaping process to form an overlapping ring 102. The explosion-proof mounting hole 101 is formed on the inner wall of the overlapping ring 102. The mating position 104 formed at the connection between the overlapping ring 102 and the outer convex ring 103 is set as a plane. The thickness of the overlapping ring 102 is the same as the thickness of the skirt ring 22. The skirt ring 22 is adapted to the explosion-proof mounting hole 101, guiding the two to be spliced ​​together in the correct position. The top surface of the overlapping ring 102 is mated with the top surface of the skirt ring 22, and the bottom surface of the overlapping ring 102 is mated with the bottom surface of the skirt ring 22. The skirt ring 22 is inserted into the explosion-proof mounting hole 101 and welded together by butt welding.

[0028] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A blade battery casing with an explosion-proof valve structure, characterized in that, include: The housing (1) has an explosion-proof mounting hole (101) through its side wall. The edge of the explosion-proof mounting hole (101) includes an overlapping ring (102) and an outer protruding ring (103) arranged sequentially from the inside to the outside. The explosion-proof mounting hole (101) is formed on the inner wall of the overlapping ring (102). The outer protruding ring (103) protrudes from the side wall of the housing (1). A mating position (104) is formed at the connection between the overlapping ring (102) and the outer protruding ring (103). The mating position (104) is higher than the side wall of the housing (1). An explosion-proof valve (2) is provided, comprising a valve body (21) and a skirt ring (22) extending along the edge of the valve body (21). An annular recessed groove (201) is provided on the top surface of the valve body (21). The recessed groove (201) and the skirt ring (22) are shaped to fit each other. The skirt ring (22) is at least partially fitted with the mating position (104) and welded to be fixed.

2. The blade battery casing with an explosion-proof valve structure according to claim 1, characterized in that, The mating position (104) is an upward-facing stepped cavity, and the skirt ring (22) is at least partially inserted into and welded to the mating position (104).

3. The blade battery casing with an explosion-proof valve structure according to claim 1, characterized in that, The thickness of the skirt ring (22) is greater than the thickness of the valve body (21), the bottom surface of the skirt ring (22) is on the same plane as the bottom surface of the valve body (21), and the top surface of the skirt ring (22) is higher than the top surface of the valve body (21).

4. The blade battery casing with an explosion-proof valve structure according to claim 1, characterized in that, The top surface of the overlapping ring (102) is provided with a mating groove (105) so that the depth of the mating position (104) is the same as the thickness of the skirt ring (22).

5. A blade battery casing with an explosion-proof valve structure according to claim 1, characterized in that, The recessed groove (201) is spaced apart from the skirt ring (22).

6. The blade battery casing with an explosion-proof valve structure according to claim 1, characterized in that, The thickness of the outer convex ring (103) is less than or equal to the thickness of the shell (1).

7. A blade battery casing with an explosion-proof valve structure according to claim 1, characterized in that, The thickness of the overlapping ring (102) is greater than or equal to the thickness of the shell (1).

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