Battery cell shell stamping die

Abstract

The utility model relates to the technical field of stamping dies, in particular to a battery cell shell stamping die. Comprising a lower die and an upper die, a male die is arranged on the upper die, the lower die comprises a base, a supporting table is arranged on the base, the supporting table is slidably connected with a lifting plate, a spring is arranged between the supporting table and the lifting plate, folded plates are rotatably connected to the periphery of the supporting table, and supports are arranged on the two sides of the periphery of the supporting table; a shaft hole is formed in the top of the support, the folded plate comprises a folded plate body, a pushing plate is arranged on one side of the folded plate body, rotating shafts are arranged on the two sides of the pushing plate and rotationally connected with the shaft hole, and a positioning frame is arranged on the upper portion of the lower die. When the punching die is used for punching, a battery cell shell is not easily scratched.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, and in particular to a stamping die for a battery cell casing. Background Technology

[0002] The cell casing, also known as the battery casing, is used to protect the battery cell components. It is manufactured using a stamping process. Figure 6 The image shown is a battery cell casing, which is made of Figure 5 The blank shown is stamped. In the prior art, the die used to stamp the battery cell shell has a rectangular cross-section die on the lower die, the length and width of which are equal to the length and width of the outer shell of the battery cell, respectively. The upper die has a rectangular cross-section punch, the length and width of which are equal to the length and width of the inner shell of the battery cell, respectively. During stamping, the blank will rub against the four walls of the die, which can easily cause scratches. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a stamping die for battery cell housing, addressing the aforementioned technical deficiencies.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a stamping die for a battery cell casing, including a lower die and an upper die. The upper die is provided with a punch, the lower die includes a base, and a support platform is provided on the base. The support platform is slidably connected to a lifting plate and a spring is provided between the two. Folding plates are rotatably connected around the support platform. Supports are provided on both sides of the support platform. A shaft hole is provided at the top of the support. The folding plate includes a folding plate body. A push plate is provided on one side of the folding plate body. Rotating shafts are provided on both sides of the push plate. The rotating shafts are rotatably connected to the shaft hole. A positioning frame is provided on the upper part of the lower die.

[0005] To further optimize this technical solution, the bottom surface of the lifting plate is provided with multiple guide pillars, and the lower mold is provided with multiple guide holes for sliding connection with the guide pillars. The upper part of the guide hole is provided with an upper receiving hole, and the spring is located in the upper receiving hole. The lower part of the guide hole is provided with a lower receiving hole, and the baffle at the lower end of the guide pillar is located in the lower receiving hole.

[0006] To further optimize this technical solution, insertion platforms are provided around the bottom surface of the lifting plate.

[0007] Compared with the prior art, the present invention has the following advantages: a support platform is provided on the base, a lifting plate is slidably connected to the support platform and a spring is provided between the two, and folding plates are rotatably connected around the support platform. During stamping, the lifting plate can make the folding plates rotate, thereby pressing the blank plate around the outside of the punch, thus forming the battery cell shell and making it less prone to scratches. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of a stamping die for a battery cell casing.

[0009] Figure 2 This is a schematic diagram of the lower mold structure.

[0010] Figure 3 This is a schematic diagram of the folded plate structure.

[0011] Figure 4 This is a sectional view of the lower mold.

[0012] Figure 5 This is a schematic diagram of the blank plate.

[0013] Figure 6 This is a schematic diagram of the battery cell casing.

[0014] In the diagram: 1. Lower mold; 11. Base; 12. Support platform; 13. Support; 14. First folding plate; 141. Folding plate body; 142. Push plate; 143. Rotating shaft; 15. Lifting plate; 16. Positioning frame; 17. Second folding plate; 18. Guide hole; 181. Upper receiving hole; 182. Lower receiving hole; 2. Upper mold. Detailed Implementation

[0015] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0016] Detailed implementation method: combined with Figure 1-4As shown, a battery cell casing stamping die includes a lower die 1 and an upper die 2. The upper die 2 has a punch, the length and width of which are equal to the length and width of the inside of the battery cell casing, respectively. The lower die 1 includes a base 11, on which a support platform 12 is provided. A lifting plate 15 is slidably connected to the support platform 12, and a spring is provided between them. The spring can push the lifting plate 15 upwards. The length and width of the lifting plate 15 are equal to the length and width of the outside of the battery cell casing, respectively. Folding plates are rotatably connected to all four sides of the support platform 12. Supports 13 are provided on both sides of the support platform 12, and a shaft hole is provided at the top of each support 13. The folding plates include a folding plate body 141, a push plate 142 is provided on one side of the folding plate body 141, and rotating shafts 143 are provided on both sides of the push plate 142. The rotating shafts 143 are rotatably connected to the shaft hole. The folding plates are of two types: a first folding plate 14 and a second folding plate 17. There are two of each type of mold. Two first folding plates 14 are located on opposite sides of the support platform 12, and two second folding plates 17 are located on the other opposite sides of the support platform 12. The length of the first folding plate 14 is equal to or slightly less than the width of the battery cell shell and is used to bend the battery cell shell along its length. The length of the second folding plate 17 is equal to or slightly less than the length of the battery cell shell and is used to bend the battery cell shell along its width. The distance between the shaft hole and the plane containing the side of the corresponding lifting plate 15 is equal to the distance between the rotating shaft 143 and the plane containing the upper surface of the folding plate body 141 (the upper surfaces of the folding plate body 141 and the pushing plate 142 are on the same plane). The upper part of the lower mold 1 is provided with a positioning frame 16. In its natural state, when the blank is placed on the top surface of the lifting plate 15, the blank is located inside the positioning frame 16. The length and width inside the positioning frame 16 are equal to the length and width of the blank, respectively, thus positioning the blank. The width of the folded plate 141 is greater than the distance between its two corresponding supports 13, and the distance between the inner side of the folded plate 141 and the pivot 143 is equal to the distance between the outer side of the support 13 and the shaft hole. The top surface of the support 13 is semi-cylindrical, so that the folded plate can be in a horizontal state under natural conditions.

[0017] Specifically, the bottom surface of the lifting plate 15 is provided with multiple guide posts, and the lower mold 1 is provided with multiple guide holes 18 for sliding connection with the guide posts. The upper part of the guide hole 18 is provided with an upper receiving hole 181, and the spring is located in the upper receiving hole 181. The lower part of the guide hole 18 is provided with a lower receiving hole 182, and the baffle at the lower end of the guide post is located in the lower receiving hole 182. Due to the presence of the baffle, the height of the lifting plate 15 after it is raised is limited, and the spring still has a large elastic force.

[0018] Furthermore, the bottom surface of the lifting plate 15 is provided with insertion platforms around its perimeter. The bottom surface of the insertion platforms is lower than the bottom surface of the lifting plate 15. During stamping, the insertion platforms contact the push plate 142, so that the position of the shaft hole does not need to be much higher than the top surface of the support platform 12.

[0019] In use, this mold is installed on a stamping machine. During stamping, the blank is placed on the lifting plate 15 and positioned within the positioning frame 16. Then, the upper die 2 is lowered. After the bottom surface of the punch contacts the top surface of the blank, the blank and the lifting plate 15 are pressed downwards. When the insertion table contacts the upper surface of the push plate 142, the bending plate rotates to bend the blank. When the bottom surface of the lifting plate 15 contacts the top surface of the support table 12, the bending plate is in a vertical position, pressing the blank tightly against the outside of the punch, thus forming the battery cell shell. During this process, scratches are less likely to occur. The problem is that when the upper mold 2 is raised, the lifting plate 15 along with the battery cell housing is raised under the action of the spring. Under the action of the friction of the battery cell housing, the upper part of the folding plate flips outward at a small angle. Then, since the weight of the folding plate body 141 is greater than the weight of the push plate 142, the folding plate rotates to a horizontal state under the action of gravity. In order to ensure that the folding plate can return to a horizontal state, a return weight can be set on the outer side of the bottom surface of the folding plate, or a tension spring or elastic band can be set between the outer end of the folding plate and the base 11.

[0020] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A stamping die for a battery cell casing, comprising a lower die (1) and an upper die (2), wherein a punch is provided on the upper die (2), characterized in that: The lower mold (1) includes a base (11), on which a support platform (12) is provided. The support platform (12) is slidably connected to a lifting plate (15) and a spring is provided between them. Folding plates are rotatably connected around the support platform (12). Supports (13) are provided on both sides of the support platform (12). A shaft hole is provided on the top of the support (13). The folding plate includes a folding plate body (141). A push plate (142) is provided on one side of the folding plate body (141). A rotating shaft (143) is provided on both sides of the push plate (142). The rotating shaft (143) is rotatably connected to the shaft hole. A positioning frame (16) is provided on the upper part of the lower mold (1).

2. The cell casing stamping die according to claim 1, characterized in that: The bottom surface of the lifting plate (15) is provided with multiple guide posts, and the lower mold (1) is provided with multiple guide holes (18) for sliding connection with the guide posts. The upper part of the guide hole (18) is provided with an upper receiving hole (181), the spring is located in the upper receiving hole (181), the lower part of the guide hole (18) is provided with a lower receiving hole (182), and the baffle at the lower end of the guide post is located in the lower receiving hole (182).

3. A cell casing stamping die according to any one of claims 1-2, characterized in that: The lifting plate (15) has insertion platforms on all four sides of its bottom surface.

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