An injection mold for the shell of lithium battery of new energy vehicles

Abstract

The present application relates to the technical field of injection molds, and specifically to an injection mold for a lithium battery shell of a new energy vehicle, comprising a die seat, a punch seat, a casting cavity provided on the die seat, a punch output end provided on the punch seat and cooperating with the casting cavity to form a plastic part mold cavity, and a plurality of casting columns evenly provided on both sides of the casting cavity for forming vents for the plastic part, a casting column provided inside the casting cavity, a detachment component provided on both sides for pushing the plastic part to detach from the casting column, a pushing component provided on both sides of the punch output end for pushing the detachment component to shrink, a feeding port penetrating through the punch output end is provided on one side of the punch seat away from the die seat, when the mold is closed, the pushing component pushes the detachment component to shrink so that the casting column is exposed, and when demolding, the detachment component pushes the side of the lithium battery shell provided with the vent to shrink into the lithium battery shell, so that the side of the lithium battery shell with the vent will not be stuck by the casting column, so that the lithium battery shell with the vent is formed in one step.

Description

Technical Field

[0001] The present application relates to the technical field of injection molds, and in particular to an injection mold for a lithium battery shell of a new energy vehicle. Background Art

[0002] The lithium battery casing is an important component of the lithium battery, and it plays a key role in protecting the battery cells and circuits. In the prior art, in order to release the internal pressure of the lithium battery and reduce the risk of explosion, vents are usually opened on both sides of the lithium battery casing to allow the gas generated by the lithium battery when it is overcharged, short-circuited or thermally runaway to flow out through the vents, thereby reducing the risk of explosion.

[0003] However, the provision of the vents also means that the lithium battery casing cannot be formed in one go during injection molding (because the vents need to pass through the side walls of the lithium battery casing, which causes the lithium battery casing formed in one go to be stuck in the injection mold). After the lithium battery casing is formed, it is necessary to use a stamping device to punch out vents on both sides of the lithium battery casing, which is very troublesome. For this reason, the present application proposes an injection mold for a lithium battery casing of a new energy vehicle, which is used to mold a lithium battery casing with vents on both sides at one go without causing the lithium battery casing to be stuck in the injection mold. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of this application is to provide an injection mold for a lithium battery shell of a new energy vehicle, which is used to mold a lithium battery shell with vents on both sides in one go without causing the lithium battery shell to get stuck in the injection mold.

[0005] The above-mentioned purpose of the present application is achieved through the following technical solutions: an injection mold for a new energy vehicle lithium battery shell, comprising a die seat, a punch seat, a casting cavity opened on the die seat, a punch output end arranged on the punch seat and cooperating with the casting cavity to form a plastic part mold cavity, and a plurality of casting columns evenly arranged on both sides of the casting cavity for forming vents for the plastic part, the casting cavity is provided with a detachment component on both sides of the casting column for pushing the plastic part away from the casting column, the punch output end is provided with a pushing component on both sides of the detachment component for pushing the contraction of the detachment component, and the punch seat is provided with a feeding port penetrating the punch output end on a side away from the die seat.

[0006] Furthermore, the detachment assembly includes two detachment plates respectively attached to the two sides of the casting column provided inside the casting cavity, a through hole opened on the detachment plate and passing through the detachment plate, a receiving groove opened on the two sides of the casting column provided inside the casting cavity for receiving the detachment plate, and a support spring arranged in the receiving groove for pushing the detachment plate to extend out of the receiving groove, and the through hole is opened in multiple numbers and the number is the same as the number of the casting columns on one side inside the casting cavity.

[0007] Furthermore, the pushing assembly includes an inclined groove opened on the opposite side of the two separation plates and along the height direction of the separation plates, and a pushing rod arranged at the bottom end of the inclined groove on both sides of the output end of the punch, and the internal space of the inclined groove gradually decreases from top to bottom.

[0008] By adopting the above technical solution, the die seat and the punch seat are installed on the injection molding machine, and then the injection molding machine is started to close the die seat and the punch seat. During this process, the push rods on both sides of the punch output end abut the inclined surface of the inclined groove, and gradually push the separation plate into the receiving groove along the inclined surface to expose the casting column. The pushed separation plate compresses the support spring. When the die seat and the punch seat are completely closed, the punch output end and the casting cavity form a mold cavity of the plastic part. At this time, the injection molding machine injects plastic into the mold cavity through the feed port. The plastic fills the mold cavity to form a lithium battery shell with a vent, and waits for After the lithium battery shell is cooled, the injection molding machine is started to demold the concave mold seat and the punch mold seat. During the demolding process, the supporting spring pushes the side of the lithium battery shell with the vent to shrink into the lithium battery shell, so that the side of the lithium battery shell with the vent will not be stuck by the casting column. In this way, the staff can remove the lithium battery shell with the vent from the casting cavity, so that the injection mold can mold the lithium battery shell with vents on both sides at one time without causing the lithium battery shell to be stuck in the injection mold, thereby improving the production efficiency of the lithium battery shell and reducing the production cost of the lithium battery shell.

[0009] Furthermore, the front and rear sides of the push rod are provided with connection openings which penetrate through the front and rear sides of the push rod and the bottom end of the push rod.

[0010] By adopting the above-mentioned technical scheme, although the setting of the pushing component and the disengaging component enables the injection mold to mold a lithium battery casing with vents on both sides at one time without causing the lithium battery casing to be stuck in the injection mold, the setting of the pushing rod will cause the portion of the lithium battery casing that contacts the pushing rod to be thinner when the lithium battery casing is molded in the mold cavity, resulting in the portion of the lithium battery casing that contacts the pushing rod being easily damaged after molding. The setting of the connecting port solves this technical problem. Through the setting of the connecting port, a portion of the lithium battery casing can be molded in the connecting port when it is molded in the mold cavity, so that the portion of the lithium battery casing that contacts the pushing rod will not be too thin, thereby preventing the portion of the lithium battery casing that contacts the pushing rod from being of moderate thickness and not easily damaged.

[0011] Furthermore, the bottom end of the push rod extends out of the output end of the male die and is provided with a filling structure for filling the portion of the bottom end of the push rod that is penetrated by the connecting port.

[0012] Furthermore, the filling structure includes two placement openings and a card interface respectively opened on the left and right sides of the bottom end of the push rod, a baffle plate arranged in the placement opening and rotatably connected to the push rod on both sides, a card connecting plate arranged on the end of the baffle away from the push rod, and an insertion interface opened on the top surface of the card interface corresponding to the card connecting plate.

[0013] By adopting the above technical solution, although the setting of the pushing component and the disengaging component enables the injection mold to mold a lithium battery shell with vents on both sides at one time without causing the lithium battery shell to be stuck in the injection mold, the lithium battery shell pushed by the disengaging component will not be completely stuck in the casting cavity, but the staff still needs to manually remove the lithium battery shell from the casting cavity, which makes it quite troublesome for the staff to remove the lithium battery shell. The setting of the filling structure solves this technical problem. By setting the filling structure, before the die seat and the punch seat are molded together, the die seat is rotated. The baffle allows the connecting plate to be inserted into the plug interface, so that the baffle fills the portion of the bottom end of the push rod that is penetrated by the connecting port. After the die seat and the punch seat are molded together, the bottom surface of the baffle abuts against the bottom surface of the casting cavity. In this way, when the lithium battery shell is formed, it will be stuck on the push rod, so that when the die seat and the punch seat are demolded, the push rod will be demolded together with the lithium battery shell. In this way, the staff only needs to pull the lithium battery shell downward, so that the baffle rotates downward and no longer fills the portion of the bottom end of the push rod that is penetrated by the connecting port, and the lithium battery shell can be removed, making it more convenient for the staff to remove the lithium battery shell from the injection mold.

[0014] Furthermore, extruded rubber is evenly laid on the inner wall of the plug port.

[0015] By adopting the above technical solution, the extruded rubber is used to increase the friction between the clamping plate and the plug interface to prevent the baffle from rotating during demoulding.

[0016] Furthermore, elastic rubber is provided on both sides of the inclined groove.

[0017] By adopting the above technical solution, the elastic rubber is used to fill the gap between the push rod and the two sides of the inclined groove to prevent the plastic fluid from flowing in.

[0018] Furthermore, the elastic rubber is perfluoroether rubber.

[0019] By adopting the above technical solution, the perfluoroether rubber has good heat resistance and elasticity, which can prevent the elastic rubber from melting when it contacts the plastic fluid.

[0020] Furthermore, the surface of the elastic rubber is coated with silicone oil coating.

[0021] By adopting the above technical solution, the silicone oil coating can prevent the plastic fluid from adhering to the elastic rubber.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] Through the setting of the disengagement component and the pushing component, the die base and the punch base are installed on the injection molding machine, and then the injection molding machine is started to close the die base and the punch base. In this process, the pushing rods on both sides of the punch output end abut the inclined surface of the inclined groove, and gradually push the disengagement plate into the receiving groove along the inclined surface to expose the casting column. The pushed disengagement plate compresses the support spring. When the die base and the punch base are completely closed, the punch output end and the casting cavity form a mold cavity of the plastic part. At this time, the injection molding machine injects plastic into the mold cavity through the feed port. The plastic fills the mold cavity to form a lithium battery shell with a vent, and waits for After the lithium battery shell is cooled, the injection molding machine is started to demold the concave mold seat and the punch mold seat. During the demolding process, the supporting spring pushes the side of the lithium battery shell with the vent to shrink into the lithium battery shell, so that the side of the lithium battery shell with the vent will not be stuck by the casting column. In this way, the staff can remove the lithium battery shell with the vent from the casting cavity, so that the injection mold can mold the lithium battery shell with vents on both sides at one time without causing the lithium battery shell to be stuck in the injection mold, thereby improving the production efficiency of the lithium battery shell and reducing the production cost of the lithium battery shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the embodiment;

[0025] Figure 2 is along Figure 1 Sectional view along line AA;

[0026] Figure 3 It is another view of the overall structure of the embodiment;

[0027] Figure 4 yes Figure 3 Enlarged view of part A in the middle;

[0028] Figure 5 yes Figure 2 Enlarged view of part B in the middle.

[0029] Figure numerals: 1. die seat; 10. casting cavity; 11. casting column; 2. punch seat; 20. punch output end; 21. feed port; 3. disengagement assembly; 30. disengagement plate; 31. through port; 32. storage slot; 33. support spring; 4. pushing assembly; 40. inclined slot; 41. pushing rod; 42. connecting port; 43. elastic rubber; 5. filling structure; 50. placement port; 51. card interface; 52. baffle; 53. card plate; 54. plug interface. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings.

[0031] Example, see Figure 1 , Figure 2 , a new energy vehicle lithium battery shell injection mold, including a die base 1, a punch base 2, a casting cavity 10 opened on the die base 1, a punch output end 20 arranged on the punch base 2 and cooperating with the casting cavity 10 to form a plastic part mold cavity, and a plurality of casting columns 11 evenly arranged on both sides of the casting cavity 10 for forming vents in the plastic part. In order to ensure that the plastic part can be smoothly demolded from the mold after molding, especially to avoid the vent part being stuck by the casting column 11, the present embodiment is provided with a separation component 3 on both sides of the casting column 11 inside the casting cavity 10. The separation component 3 is composed of two separation plates 30 that are tightly fitted to the inner wall of the casting cavity 10 and have through holes 31 corresponding to the positions of the casting columns 11 on the surface. The through holes 31 on the separation plate 30 correspond to the casting columns 11 one by one. The separation plate 30 is sleeved on the casting column 11 through the through holes 31, so that the plastic fluid can be smoothly filled and form a vent structure. At the same time, both sides of the casting cavity 10 are provided with receiving grooves 32 specifically for receiving the separation plate 30, and support springs 33 built into the receiving grooves 32. These support springs 33 are compressed during the mold closing process, but become the main supporting force to push the plastic part away from the casting column 11 during demolding.

[0032] In order to prevent the detachment component 3 from affecting the molding of the plastic part during the mold closing process, a push component 4 is provided on both sides of the male mold output end 20. The push component 4 includes an inclined groove 40 opened along the height direction of the detachment plate 30, and a push rod 41 arranged on both sides of the male mold output end 20 relative to the inclined groove 40. The internal space of the inclined groove 40 gradually decreases from top to bottom, so that during the mold closing process, the push rod 41 can gradually push the detachment plate 30 to shrink into the receiving groove 32 along the inclined surface of the inclined groove 40, while compressing the support spring 33. When the mold is completely closed, the male mold output end 20 and the casting cavity 10 are closely matched to form a perfect plastic part mold cavity. The injection molding machine accurately injects plastic through the feed port 21, and the plastic quickly fills the entire mold cavity. After cooling, a lithium battery shell with a vent is formed.

[0033] During demoulding. As the injection molding machine starts the demoulding procedure, the concave mold seat 1 and the convex mold seat 2 gradually separate. At this time, the previously compressed support spring 33 quickly releases energy, pushing the release plate 30 and the vents of the lithium battery shell attached thereto to shrink into the lithium battery shell, ensuring that the shell can easily break away from the constraints of the casting column 11, avoiding the occurrence of jamming. In this way, the staff can easily remove the well-formed lithium battery shell from the casting cavity 10, which not only realizes the one-time molding of the lithium battery shell with vents on both sides, but also greatly improves production efficiency and reduces production costs.

[0034] Although the combination of the push component 4 and the disengagement component 3 has greatly optimized the performance of the injection mold, allowing the mold to mold a lithium battery shell with vents on both sides at one time, and effectively avoiding the problem of the shell being stuck during demolding, in actual application, the designer found a new problem: the existence of the push rod 41 will cause the material of the lithium battery shell in contact with the push rod 41 to be unevenly distributed during the mold closing and injection molding process. This part of the shell is relatively thin, which increases the risk of damage to this area after molding. In order to fundamentally solve this technical problem, this embodiment has made further innovations and optimizations in the design of the push rod 41.

[0035] Specifically, in this embodiment, connection ports 42 are provided on the front and rear sides of the push rod 41, which pass through the front and rear sides and the bottom of the push rod 41. The function of the connection ports 42 is that when the injection mold is in the mold closing state and the plastic material begins to fill the mold cavity, part of the plastic can flow into and fill the inside of these connection ports 42, thereby forming an additional, more solid structural layer in the area where the lithium battery shell contacts the push rod 41. In this way, the shell part that may have become weak due to uneven material distribution has its thickness effectively increased due to the support of the plastic in the connection ports 42, making it more solid and durable.

[0036] Through the design of the connection port 42, when the lithium battery shell is formed in the mold cavity, the part of the lithium battery shell that contacts the push rod 41 is no longer as weak as before, but reaches a moderate thickness, which not only ensures the overall strength of the shell, but also avoids the risk of damage caused by local weakness. This improvement not only further improves the quality of the finished lithium battery shell, but also extends its service life, providing a more solid guarantee for the safety and reliability of lithium batteries for new energy vehicles.

[0037] Although the synergy between the push component 4 and the release component 3 has significantly improved the performance of the injection mold, enabling the mold to mold a lithium battery shell with vents on both sides at one time, and effectively avoiding the problem of the shell being stuck in the casting cavity 10 during demolding, in actual operation, the staff still needs to manually remove the molded lithium battery shell from the casting cavity 10, which is not only cumbersome but also inefficient. In order to completely solve this technical problem, refer to Figure 3 and Figure 4 In this embodiment, a filling structure 5 is provided at the bottom end of the push rod 41 .

[0038] The filling structure 5 includes two placement openings 50 and a card interface 51 respectively opened on the left and right sides of the bottom end of the push rod 41, and a series of matching parts. Inside the placement opening 50, a baffle 52 is installed, and the two sides of the baffle 52 are connected to the rotation of the push rod 41 to achieve a flexible movement function. The other end of the baffle 52 is equipped with a card plate 53, and on the top surface of the card interface 51, a plug-in interface 54 is opened at the position corresponding to the card plate 53. This series of structural designs constitute the core of the filling structure 5.

[0039] Before the die base 1 and the punch base 2 are molded together, the staff only needs to simply rotate the baffle 52 so that the clamping plate 53 is accurately inserted into the plug port 54. At this time, the baffle 52 can fill the vacant part at the bottom of the push rod 41 formed by the connection port 42 passing through, forming a complete support surface. When the die base 1 and the punch base 2 are successfully molded together, the bottom surface of the baffle 52 will be tightly against the bottom surface of the casting cavity 10, providing a stable support environment for the molding of the lithium battery shell.

[0040] Due to the filling function of the baffle 52, when the lithium battery shell is formed in the mold cavity, its bottom will be tightly stuck on the push rod 41. Therefore, during the demolding process of the female mold base 1 and the male mold base 2, the push rod 41 will naturally move with the lithium battery shell. In this way, the staff only needs to gently pull the lithium battery shell downward after demolding, so that the baffle 52 rotates downward under the force of the staff, so as to no longer fill the vacant part at the bottom of the push rod 41. At this time, the lithium battery shell can be easily removed from the mold.

[0041] The setting of the filling structure 5 not only greatly simplifies the operation process of the staff to remove the lithium battery shell from the injection mold and improves the work efficiency, but also ensures the stability and integrity of the lithium battery shell during the molding process.

[0042] In this embodiment, extruded rubber is evenly laid on the inner wall of the plug-in port 54 , and the extruded rubber is used to increase the friction between the clamping plate 53 and the plug-in port 54 to prevent the baffle 52 from rotating during demoulding.

[0043] Reference Figure 5 In this embodiment, elastic rubber 43 is provided on both sides of the inclined groove 40 , and the elastic rubber 43 is used to fill the gap between the push rod 41 and both sides of the inclined groove 40 to prevent the plastic fluid from flowing in.

[0044] In this embodiment, the elastic rubber 43 is perfluoroether rubber, which has good heat resistance and elasticity, and can prevent the elastic rubber 43 from melting when it contacts the plastic fluid.

[0045] In this embodiment, the surface of the elastic rubber 43 is coated with silicone oil coating, which can prevent the plastic fluid from adhering to the elastic rubber 43 .

[0046] Specific implementation process: install the die base 1 and the punch base 2 on the injection molding machine, then rotate the baffle 52 to insert the clamping plate 53 into the plug interface 54, so that the baffle 52 fills the part of the bottom end of the push rod 41 that is penetrated by the connecting port 42, and then start the injection molding machine to close the die base 1 and the punch base 2. During this process, the push rods 41 on both sides of the punch output end 20 abut against the inclined surface of the inclined groove 40, and gradually push the detachment plate 30 into the receiving groove 32 along the inclined surface to expose the casting column 11. The pushed detachment plate 30 compresses the support spring 33. When the die base 1 and the punch base 2 are completely closed, the bottom surface of the baffle 52 abuts against the bottom surface of the casting cavity 10, and the punch output end 20 and the casting cavity 10 form a mold cavity of the plastic part. At the same time, the injection molding machine injects plastic into the mold cavity through the feed port 21, and the plastic fills the mold cavity to form a lithium battery shell with a vent. During the molding process, the lithium battery shell is stuck on the push rod 41, and then the lithium battery shell is cooled, and the injection molding machine is started to demold the concave mold base 1 and the punch mold base 2. During the demolding process, the support spring 33 pushes the side of the lithium battery shell with the vent to shrink into the lithium battery shell, so that the side of the lithium battery shell with the vent will not be stuck by the casting column 11. At the same time, the push rod 41 will also take the lithium battery shell out of the casting cavity 10, and then the staff only needs to pull the lithium battery shell downward so that the baffle 52 rotates downward and no longer fills the part of the bottom end of the push rod 41 that is penetrated by the connecting port 42, and the lithium battery shell can be removed.

[0047] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A new energy vehicle lithium battery shell injection mold, characterized in that: The invention comprises a die base (1), a punch base (2), a casting cavity (10) provided on the die base (1), a punch output end (20) provided on the punch base (2) and cooperating with the casting cavity (10) to form a mold cavity of a plastic part, and a plurality of casting columns (11) evenly provided on both sides of the casting cavity (10) for forming vents in the plastic part, wherein a detachment component (3) for pushing the plastic part to detach from the casting column (11) is provided on both sides of the casting column (11) in the casting cavity (10), a pushing component (4) for pushing the detachment component (3) to contract is provided on both sides of the punch output end (20), a material inlet (21) penetrating the punch output end (20) is provided on one side of the punch base (2) away from the die base (1), and the detachment component (3) comprises two pieces respectively attached to the two sides of the casting column (11) in the casting cavity (10) and the two pieces respectively attached to the two sides of the casting column (11) in the casting cavity (10). The invention relates to a detachment plate (30), a through hole (31) formed on the detachment plate (30) and penetrating the detachment plate (30), a receiving groove (32) formed on both sides of the casting column (11) inside the casting cavity (10) for receiving the detachment plate (30), and a supporting spring (33) formed in the receiving groove (32) for pushing the detachment plate (30) out of the receiving groove (32), wherein the through hole (31) is formed with a plurality of holes and the number of the holes is the same as the number of the casting columns (11) on one side inside the casting cavity (10), and the pushing component (4) comprises an inclined groove (40) formed on the opposite side of the two detachment plates (30) and formed along the height direction of the detachment plates (30), and a pushing rod (41) formed at the bottom ends of both sides of the male die output end (20) relative to the inclined groove (40), and the internal space of the inclined groove (40) gradually decreases from top to bottom.

2. According to claim 1, a new energy vehicle lithium battery shell injection mold, characterized in that: The front and rear sides of the push rod (41) are provided with connection openings (42) penetrating the front and rear sides of the push rod (41) and the bottom end of the push rod (41).

3. According to claim 2, a new energy vehicle lithium battery shell injection mold, characterized in that: The bottom end of the push rod (41) extends out of the male die output end (20) and is provided with a filling structure (5) for filling the portion of the bottom end of the push rod (41) that is penetrated by the connecting port (42).

4. According to claim 3, a new energy vehicle lithium battery shell injection mold, characterized in that: The filling structure (5) comprises two placement openings (50) respectively opened on the left and right sides of the bottom end of the push rod (41) and a card interface (51), a baffle (52) arranged in the placement opening (50) and rotatably connected to the push rod (41) on both sides, a card connection plate (53) arranged on the end of the baffle (52) away from the push rod (41), and an insertion interface (54) opened on the top surface of the card interface (51) and corresponding to the card connection plate (53).

5. The new energy vehicle lithium battery housing injection mold according to claim 4, characterized in that: The inner wall of the plug port (54) is evenly paved with extruded rubber.

6. The new energy vehicle lithium battery housing injection mold according to claim 1, characterized in that: Elastic rubber (43) is provided on both sides of the inclined groove (40).

7. The new energy vehicle lithium battery housing injection mold according to claim 6, characterized in that: The elastic rubber (43) is perfluoroether rubber.

8. The new energy vehicle lithium battery housing injection mold according to claim 6, characterized in that: The surface of the elastic rubber (43) is coated with silicone oil paint.

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