Female die of lithium battery shell

Abstract

The utility model relates to the technical field of dies for producing lithium battery cases, in particular to a female die of a lithium battery case, which comprises a female die body, at least three through holes surrounding a cavity of the female die body are arranged on the side wall of the female die body, the through holes are communicated with one another, a water inlet hole is arranged on the side wall of the female die body, and the water inlet hole is communicated with the cavity of the female die body. And the water inlet hole is communicated with the through hole. The side wall of the female die body is provided with at least three through holes which are communicated with one another and surround the cavity, and water inlet holes communicated with the through holes. When the cavity is cooled, one end opening, farthest from the water inlet hole, of the through hole is defined as the water outlet, then the end openings of the other through holes are sealed, cooling liquid can be injected into the through holes through the water inlet hole, and therefore the cooling liquid can conduct heat exchange around the periphery of the cavity, and comprehensive and effective cooling on the cavity is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds for producing lithium battery shells, in particular to a concave mold for lithium battery shells. Background Art

[0002] Lithium battery shells are used to protect lithium batteries and are one of the key materials for producing lithium batteries. Currently, lithium battery shells are produced by injection molding, and cooling of the cavity of the die is crucial for the stable production of lithium battery shells. If the cavity of the die is not cooled in time, the mold is prone to sticking, continuous shutdowns, and unstable dimensions of the lithium battery shell. Currently, the cooling of the die is generally in the form of direct inflow and outflow of coolant. However, this method has uneven cooling effect around the cavity of the die, making it difficult to achieve the expected cooling effect. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a concave die of a lithium battery shell, which can fully and effectively cool the cavity of the concave die.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a die for a lithium battery shell, comprising a die body, the side wall of the die body is provided with at least three through holes surrounding the cavity of the die body, the through holes are interconnected, and the side wall of the die body is provided with a water inlet hole, which is connected to the through hole.

[0005] Furthermore, the die body has at least two cooling water channels along its thickness direction, and the cooling water channels are not connected to each other. Each layer of the cooling water channel is composed of at least three through holes surrounding the cavity of the die body and one water inlet hole, and the through holes of each cooling water channel are connected to each other.

[0006] Furthermore, the die body has at least two cooling water channels along its thickness direction, and the cooling water channels are interconnected. Each layer of the cooling water channel is composed of at least three through holes surrounding the cavity of the die body. A water inlet hole is provided on the side wall of the die body, and the water inlet hole is connected to the through hole of one of the cooling water channels.

[0007] Furthermore, the water inlet end of the water inlet hole and both ends of the through hole are provided with expansion holes.

[0008] Furthermore, the diameter of the expanded hole is 10 mm to 15 mm.

[0009] Furthermore, the expanded hole is a threaded hole.

[0010] Furthermore, the diameter of the through hole is 5 mm to 10 mm, and the diameter of the water inlet hole is 5 mm to 10 mm.

[0011] The beneficial effect of the utility model is that at least three through holes that are interconnected and surround the cavity are opened on the side wall of the die body, and a water inlet hole that is connected to the through holes. When cooling the cavity, one of the ports of the through hole farthest from the water inlet hole is defined as the water outlet, and then the ports of the other through holes are sealed, and then coolant can be injected into the through hole through the water inlet hole, so that the coolant can be around the cavity for heat exchange, and the cavity can be fully and effectively cooled. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the cavity surface structure of a concave mold of a lithium battery shell of the utility model;

[0013] Figure 2 The side structure diagram of the concave mold of a lithium battery shell of the utility model is shown in FIG. Figure 1 ;

[0014] Figure 3 The side structure diagram of the concave mold of a lithium battery shell of the utility model is shown in FIG. Figure 2 ;

[0015] Description of labels:

[0016] 1. Die body; 11. Through hole; 12. Water inlet hole;

[0017] 2. Hole expansion; 3. Cavity. DETAILED DESCRIPTION

[0018] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0019] Lithium battery shells are used to protect lithium batteries and are one of the key materials for producing lithium batteries. Currently, lithium battery shells are produced by injection molding, and the cooling of the die is crucial for the stable production of lithium battery shells. If the die is not cooled in time, the mold is prone to sticking, continuous shutdowns, and unstable dimensions of the lithium battery shell. Currently, the cooling of the die is generally in the form of direct inflow and outflow of coolant. However, this method has uneven cooling effect around the cavity of the die, making it difficult to achieve the expected cooling effect.

[0020] Based on this, the present application provides a concave mold for a lithium battery shell, which can solve the problem of poor cooling effect of the cavity.

[0021] Please refer to Figures 1 to 3As shown, the utility model is a concave mold of a lithium battery shell, comprising a concave mold body 1, the side wall of the concave mold body 1 is provided with at least three through holes 11 surrounding the cavity 3 of the concave mold body 1, the through holes 11 are connected to each other, and the side wall of the concave mold body 1 is provided with a water inlet hole 12, the water inlet hole 12 is connected to the through hole 11. The aperture of the through hole 11 is 5mm to 10mm, and the aperture of the water inlet hole 12 is 5mm to 10mm.

[0022] It is understandable that in order to allow the cooling water to perform heat exchange around the cavity 3, three through holes 11 can enclose a triangular enclosed space, four through holes 11 can enclose a rectangular enclosed space, five through holes 11 can enclose a pentagonal enclosed space, and so on. Of course, in theory, the more through holes 11 are set, the closer the coolant can be to the cavity 3, thereby achieving a better heat exchange effect. However, due to the difficulty of machining the machine tool, it is preferred to set four through holes 11 to enclose a rectangular enclosed space, which can not only meet the cooling of the cavity 3, but also facilitate the machining of the die body 1.

[0023] Working principle: When cooling the cavity, one of the ports of the through hole 11 farthest from the water inlet hole 12 is defined as the water outlet, and then the remaining ports of the through hole 11 are sealed, and then the coolant can be injected into the through hole 11 through the water inlet hole 12, so that the coolant can be around the cavity 3 for heat exchange, thereby achieving comprehensive and effective cooling of the cavity 3.

[0024] In the first implementation, please refer to Figure 1 and Figure 2 As shown, the die body 1 has at least two cooling water channels along its thickness direction, and the cooling water channels are not connected to each other. Each layer of the cooling water channel is composed of at least three through holes 11 surrounding the cavity 3 of the die body 1 and one water inlet hole 12, and the through holes 11 of each cooling water channel are connected to each other. Providing multiple independent cooling water channels can further improve the cooling of the cavity 3.

[0025] For the first embodiment described above, since the temperature of the coolant is relatively low when it enters the through hole 11, that is, the heat exchange effect of the coolant is optimal at this time, it is preferred that when multiple independent cooling water channels are provided, the water inlet 12 of each cooling water channel is not on the same side wall of the die body 1. Here, taking the provision of two independent cooling water channels as an example, it is most preferred that the side wall of the die body 1 where the water inlet 12 of the first cooling water channel is located has a water outlet for discharging the coolant of the second cooling water channel (that is, the side wall of the die body 1 where the water outlet for discharging the coolant of the first cooling water channel is located has a second cooling water inlet 12).

[0026] In the second implementation, please refer to Figure 1 and Figure 3 As shown, the die body 1 has at least two cooling water channels along its thickness direction, and the cooling water channels are interconnected. Each layer of the cooling water channel is composed of at least three through holes 11 surrounding the cavity 3 of the die body 1. A water inlet hole 12 is provided on the side wall of the die body 1, and the water inlet hole 12 is connected to the through hole 11 of one of the cooling water channels. Providing multiple independent cooling water channels can further enhance the cooling of the cavity 3. However, it should be noted that in order to allow coolant to flow in each cooling water channel and ensure the cooling effect, the water inlet hole 12 is connected to the through hole 11 of the uppermost cooling water channel, and one of the ports of the through hole 11 on the lowermost cooling water channel is defined as a water outlet; or the water inlet hole 12 is connected to the through hole 11 of the lowermost cooling water channel, and one of the ports of the through hole 11 on the uppermost cooling water channel is defined as a water outlet.

[0027] In an optional implementation, please refer to Figure 1 As shown, the water inlet end of the water inlet hole 12 and both ends of the through hole 11 are provided with expansion holes 2. Preferably, the expansion holes 2 are threaded holes. The expansion holes 2 are added to facilitate the installation of the water inlet pipe, the water outlet pipe and the sealing member.

[0028] Furthermore, the diameter of the expanded hole 2 is 10 mm to 15 mm.

[0029] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A concave mold for a lithium battery shell, characterized in that: It comprises a die body, the side wall of which is provided with at least three through holes surrounding the cavity of the die body, the through holes are interconnected, and the side wall of the die body is provided with a water inlet hole, which is connected with the through holes.

2. The concave mold of the lithium battery shell according to claim 1, characterized in that: The die body has at least two cooling water channels along its thickness direction, and the cooling water channels are not connected to each other. Each layer of the cooling water channel is composed of at least three through holes surrounding the cavity of the die body and one water inlet hole, and the through holes of each cooling water channel are connected to each other.

3. The concave mold of the lithium battery shell according to claim 1, characterized in that: The die body has at least two cooling water channels along its thickness direction, and the cooling water channels are interconnected. Each layer of the cooling water channel is composed of at least three through holes surrounding the cavity of the die body. A water inlet hole is provided on the side wall of the die body, and the water inlet hole is connected to the through hole of one of the cooling water channels.

4. The concave mold of the lithium battery shell according to claim 1, characterized in that: The water inlet end of the water inlet hole and both ends of the through hole are provided with expansion holes.

5. The concave mold of the lithium battery shell according to claim 4, characterized in that: The diameter of the expanded hole is 10 mm to 15 mm.

6. The concave mold of the lithium battery shell according to claim 4 or 5, characterized in that: The expanded hole is a threaded hole.

7. The concave mold of the lithium battery shell according to claim 1, characterized in that: The diameter of the through hole is 5 mm to 10 mm, and the diameter of the water inlet hole is 5 mm to 10 mm.

Images