Riveting explosion-proof valve structure of cylindrical battery and battery

Abstract

The utility model relates to the technical field of batteries, in particular to a riveting explosion-proof valve structure of a cylindrical battery and the battery, the riveting explosion-proof valve structure comprises a shell and a cover plate, the bottom of the shell is provided with an opening, the opening is provided with a first riveting area towards the inside of the shell, two ends of the cover plate are provided with second riveting areas, and the second riveting areas are riveted and fixed with the first riveting area. When the explosion-proof valve is used, the cover plate is fixedly riveted with the shell, so that the situation that the structure and the performance of the explosion-proof valve and surrounding materials are influenced by factors such as welding temperature, welding time and welding pressure during welding, the material performance of the explosion-proof valve is changed, and the explosion pressure of the explosion-proof valve is influenced by adopting a traditional welding mode is avoided; the explosion-proof valve is processed on the cover plate after the cover plate is riveted, so that the influence of welding on the opening pressure of the explosion-proof valve is avoided, each battery cell is ensured to have the same opening pressure of the explosion-proof valve, and the battery pack can show more consistent and reliable performance under extreme conditions, so that the safety and the reliability of the whole battery pack are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a riveted explosion-proof valve structure of a cylindrical battery and a battery. Background Art

[0002] With the increasing penetration rate of new energy electric vehicles, electric vehicles using cylindrical battery cells have gradually attracted the attention of users. The design schemes of cylindrical battery cells are different. Taking the design of explosion-proof valves of cylindrical battery cells as an example, some are connected to other battery cell structural parts by welding, that is, independent welded explosion-proof valves, while others are directly integrated with the battery cell cover, that is, integrated explosion-proof valves.

[0003] There are many existing technologies for the design and processing of battery explosion-proof valves, such as:

[0004] Chinese patent publication number CN220585428U discloses a battery cell and a battery, including a shell and a cover plate, the cover plate is provided with a pole, the shell and the cover plate are respectively provided with a main explosion-proof valve and an auxiliary explosion-proof valve, the opening pressure of the main explosion-proof valve is less than the opening pressure of the auxiliary explosion-proof valve, and the opening pressure of the auxiliary explosion-proof valve is less than the pressure limit that the shell can withstand.

[0005] It can be seen that the explosion-proof valve structure of most cylindrical batteries currently includes a shell and a cover plate. The main explosion-proof valve and the auxiliary explosion-proof valve are installed on the shell and the cover plate by welding to achieve multi-point pressure relief. However, the explosion-proof valve is fixed to the shell and the cover plate by welding. Factors such as welding temperature, time, and pressure may affect the structure and performance of the explosion-proof valve and its surrounding materials. If the welding temperature is too high or the time is too long, the material properties of the explosion-proof valve may change, thereby affecting its bursting pressure and making it impossible to ensure the consistency of the offline battery cells.

[0006] In view of this, we propose a riveted explosion-proof valve structure for cylindrical batteries. Utility Model Content

[0007] The purpose of the utility model is to provide a cylindrical battery explosion-proof valve structure fixed by riveting, so as to solve the problems raised in the above-mentioned background technology.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A riveted explosion-proof valve structure for a cylindrical battery comprises a cylindrical battery shell and a cover plate provided with an explosion-proof valve, wherein an opening is provided at the bottom of the shell, a first riveted area is provided in the shell opening, and second riveted areas are provided at both ends of the cover plate, and the second riveted areas are riveted and fixed to the first riveted areas.

[0010] As a further solution of the utility model: the first riveted area is a first vertical plate fixed vertically to the edge of the shell opening, and the second riveted area is a second vertical plate perpendicular to both ends of the cover plate. The cover plate is sleeved on the opening of the shell so that the second vertical plate is attached to the side of the first vertical plate close to the inner cavity of the shell.

[0011] As a further solution of the utility model: the bent inner side formed by the second vertical plate and the cover plate fits with the top of the first vertical plate, the bent inner side formed by the first vertical plate and the shell opening fits with the top of the second vertical plate, and the second vertical plate and the first vertical plate are rolled and buckled together by flanging tooling.

[0012] As a further solution of the utility model: the first riveting area is an Ω-shaped groove set at the opening of the shell, and the second riveting area is a clamping block set at both ends of the cover plate. The cover plate is sleeved on the opening of the shell so that the clamping block is clamped on the outer circle of the Ω-shaped groove.

[0013] As a further solution of the utility model: the inner ring of the clamping block is fitted with the outer ring of the Ω-shaped groove, and the clamping block is buckled with the Ω-shaped groove by riveting tooling.

[0014] As a further solution of the utility model: the middle area of ​​the cover plate is an explosion-proof valve area for processing the explosion-proof valve, and the edge of the explosion-proof valve area is provided with an explosion-proof valve engraved line.

[0015] A battery comprises the riveted explosion-proof valve structure of the cylindrical battery.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. In the riveted explosion-proof valve structure of the cylindrical battery, the traditional welding method is avoided to weld the cover plate to the shell. As a result, during welding, the temperature, time, pressure and other factors of welding affect the structure and performance of the explosion-proof valve and its surrounding materials, causing the material properties of the explosion-proof valve to change, thereby affecting the explosion pressure of the explosion-proof valve. At the same time, the yield of the battery cell is improved and the cost is reduced.

[0018] 2. In the riveted explosion-proof valve structure of the cylindrical battery, the explosion-proof valve is processed on the cover plate after riveting the cover plate, which avoids the influence of welding on the opening pressure of the explosion-proof valve, ensures that each battery cell has the same explosion-proof valve opening pressure, and can show more consistent and reliable performance when the battery pack faces extreme conditions, thereby improving the safety and reliability of the entire battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic assembly diagram of the first embodiment;

[0020] Figure 2 This is a schematic diagram of the first embodiment after riveting;

[0021] Figure 3 This is a schematic diagram of the second embodiment after riveting;

[0022] Figure 4 This is a schematic diagram of the second embodiment after riveting.

[0023] The meaning of each number in the figure is:

[0024] 100, housing; 101, first vertical plate; 102, Ω-shaped groove;

[0025] 200, cover plate; 201, second vertical plate; 202, explosion-proof valve area; 203, explosion-proof valve engraving line; 204, clamping block. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1:

[0028] like Figure 1 and Figure 2 As shown, this embodiment provides a riveted explosion-proof valve structure for a cylindrical battery, including a shell 100 of the cylindrical battery and a cover plate 200 provided with an explosion-proof valve, an opening is provided at the bottom of the shell 100, a first riveted area is provided in the shell 100 opening toward the inside of the shell 100, and second riveted areas are provided at both ends of the cover plate 200, and the second riveted area is riveted and fixed to the first riveted area.

[0029] The improvement of this embodiment lies in that the cover plate 200 is riveted to the shell 100, avoiding the traditional welding method of welding the cover plate 200 to the shell 100. As a result, during welding, the temperature, time, pressure and other factors of welding affect the structure and performance of the explosion-proof valve and its surrounding materials, resulting in changes in the material properties of the explosion-proof valve, which in turn affects the bursting pressure of the explosion-proof valve. At the same time, the yield of the battery cell is improved and the cost is reduced.

[0030] like Figure 1As shown, considering the convenience of riveting the cover plate 200 and the shell 100, the first riveted area is the first vertical plate 101 vertically fixed to the edge of the opening of the shell 100, and the second riveted area is the second vertical plate 201 vertical to both ends of the cover plate 200. The cover plate 200 is sleeved on the opening of the shell 100, so that the second vertical plate 201 is attached to the side of the first vertical plate 101 close to the inner cavity of the shell 100, and the inner side of the bend formed by the second vertical plate 201 and the cover plate 200 is attached to the top of the first vertical plate 101. The inner side of the bend formed by the plate 101 and the opening of the shell 100 fits with the top of the second vertical plate 201, and the second vertical plate 201 and the first vertical plate 101 are curled and fastened together by a flanging tool. During processing, the first vertical plate 101 and the second vertical plate 201 are bent and rolled up, and the first vertical plate 101 and the second vertical plate 201 fit tightly together, thereby reducing the gap between the cover plate 200 and the shell 100, and avoiding the situation that the gap between the cover plate 200 and the shell 100 is too large during the riveting operation, resulting in the inability to curl and fasten the plates.

[0031] like Figure 2 As shown, in order to avoid the influence of welding on the opening pressure of the explosion-proof valve, the middle area of ​​the cover plate 200 is an explosion-proof valve area 202 for processing the explosion-proof valve, and the edge of the explosion-proof valve area 202 is provided with an explosion-proof valve scale line 203. The explosion-proof valve is processed on the cover plate 200 after riveting the cover plate 200, thereby avoiding the influence of welding on the opening pressure of the explosion-proof valve, ensuring that each battery cell has the same explosion-proof valve opening pressure, and can show more consistent and reliable performance when the battery pack faces extreme conditions, thereby improving the safety and reliability of the entire battery pack.

[0032] Embodiment 2:

[0033] like Figure 3 and Figure 4 As shown, different from the first embodiment, the first riveting area is the Ω-shaped groove 102 set at the opening of the shell 100, and the second riveting area is the clamping blocks 204 set at both ends of the cover plate 200, the cover plate 200 is sleeved on the opening of the shell 100, so that the clamping block 204 is clamped on the outer circle of the Ω-shaped groove 102, the inner circle of the clamping block 204 is fitted with the outer circle of the Ω-shaped groove 102, and the clamping block 204 is buckled with the Ω-shaped groove 102 through the riveting tool, and the riveting area formed by the first riveting area and the second riveting area is an arc-shaped groove. The shape of the arc-shaped groove is used to transition the cover plate 200 and the shell 100, so that the cover plate 200 plays a buffering role, reduces the impact force on the cover plate 200, and improves its service life.

[0034] In summary, the working principle of this scheme is as follows:

[0035] Lift the cover plate 200, place the cover plate 200 from the top of the shell 100 at the opening of the shell 100, and fit the second riveted area of ​​the cover plate 200 with the first riveted area at the opening of the shell 100. When the first riveted area is the first vertical plate 101 vertically fixed to the edge of the opening of the shell 100, and the second riveted area is the second vertical plate 201 vertical to both ends of the cover plate 200, bend and roll the first vertical plate 101 and the second vertical plate 201 by the flanging tool. When the first riveted area is When the Ω-shaped groove 102 is set at the opening of the shell 100 and the second riveting area is the blocks 204 set at both ends of the cover plate 200, the blocks 204 are buckled with the Ω-shaped groove 102 by riveting tools, so that the cover plate 200 is riveted and fixed to the opening of the shell 100, so that the opening of the shell 100 is closed. After riveting, an explosion-proof valve is processed in the middle of the cover plate 200, and the explosion-proof valve engraved line 203 is processed along the edge of the processed explosion-proof valve area 202 to complete the installation.

[0036] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0037] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A riveted explosion-proof valve structure for a cylindrical battery, comprising a cylindrical battery housing (100) and a cover plate (200) provided with an explosion-proof valve, characterized in that: The shell (100) is provided with an opening at the bottom, and a first riveting area is provided in the shell (100) through the opening. The cover plate (200) is provided with a second riveting area at both ends, and the second riveting area is riveted and fixed to the first riveting area.

2. The riveted explosion-proof valve structure of a cylindrical battery according to claim 1, characterized in that: The first riveted area is a first vertical plate (101) vertically fixed to the edge of the opening of the shell (100), and the second riveted area is a second vertical plate (201) vertically fixed to both ends of the cover plate (200). The cover plate (200) is sleeved on the opening of the shell (100) so that the second vertical plate (201) is attached to a side of the first vertical plate (101) close to the inner cavity of the shell (100).

3. The riveted explosion-proof valve structure of a cylindrical battery according to claim 2, characterized in that: The inner side of the bend formed by the second vertical plate (201) and the cover plate (200) fits with the top of the first vertical plate (101); the inner side of the bend formed by the first vertical plate (101) and the opening of the shell (100) fits with the top of the second vertical plate (201); the second vertical plate (201) and the first vertical plate (101) are rolled and buckled together by means of a flanging tool.

4. The riveted explosion-proof valve structure of a cylindrical battery according to claim 1, characterized in that: The first riveting area is an Ω-shaped groove (102) arranged at the opening of the shell (100), and the second riveting area is a clamping block (204) arranged at both ends of the cover plate (200). The cover plate (200) is sleeved on the opening of the shell (100) so that the clamping block (204) is clamped on the outer ring of the Ω-shaped groove (102).

5. The riveted explosion-proof valve structure of a cylindrical battery according to claim 4, characterized in that: The inner ring of the clamping block (204) fits with the outer ring of the Ω-shaped groove (102), and the clamping block (204) is buckled with the Ω-shaped groove (102) through a riveting tool.

6. The riveted explosion-proof valve structure of a cylindrical battery according to claim 1, characterized in that: The middle area of ​​the cover plate (200) is an explosion-proof valve area (202) for processing an explosion-proof valve, and an explosion-proof valve engraved line (203) is provided at the edge of the explosion-proof valve area (202).

7. A battery, characterized in that: The battery includes the riveted explosion-proof valve structure of the cylindrical battery according to any one of claims 1 to 6.

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