Cooling plate injection molding joint method for electric vehicle battery shell frame

Abstract

The invention discloses a cooling plate injection molding jointing method for a battery shell frame of an electric vehicle. The method for joining a battery case frame and a cooling plate by injection molding according to one embodiment of the present invention, as a method for joining a battery case frame and a cooling plate in an electric vehicle battery case production process, comprises: a cooling plate preparation step of preparing an electric vehicle battery case and a cooling plate, and forming injection molding object fixing holes in the battery case and the cooling plate; a mold placing step: temporarily assembling the battery case and the cooling plate of the electric vehicle, placing the battery case and the cooling plate in an injection mold, and forming an injection molding space with a specified volume, the injection molding space forming a space communicated with the injection object fixing hole; injection molding is conducted, specifically, the injection molding space of the injection mold and the injection molding object fixing hole are filled with a preset injection molding object material; and a joining completion step: detaching the battery shell of the electric vehicle from the injection mold.

Description

Technical Field

[0001] The invention relates to a cooling plate injection molding joining method, in particular to a cooling plate injection molding joining method for a battery shell frame of an electric vehicle. Background Art

[0002] In the production process of electric vehicle battery shells, Figure 1 As shown, the battery housing frame and the cooling plate are joined by welding.

[0003] Specifically, the electric vehicle battery housing frame made of aluminum is joined to the cooling plate by FSW welding.

[0004] In production, the special characteristics of FSW welding, namely strong pressure and rotation, will cause deformation of the product, resulting in dimensional defects of existing methods and high investment costs for FSW welding machines.

[0005] Therefore, a technology is needed that can solve the problems brought about by the above-mentioned prior art.

[0006] Patent Literature

[0007] Patent Document 1: Korean Patent Publication No. 10-1277453 (grant date: June 17, 2013) Summary of the invention

[0008] Technical issues

[0009] The object of the present invention is to provide a cooling plate injection molding joining method, which improves the process efficiency by changing the joining process of the battery shell frame and the cooling plate in the production process of the electric vehicle battery shell, and can save costs and improve quality by improving the structure.

[0010] Technical Solution

[0011] In order to achieve this purpose, the cooling plate injection molding joining method for the battery shell frame of an electric vehicle of the present invention is a method for joining the battery shell frame and the cooling plate in the production process of the battery shell of an electric vehicle, and may include: a cooling plate preparation step, preparing the electric vehicle battery shell and the cooling plate, and forming an injection molding fixing hole on the battery shell and the cooling plate; a mold placement step, temporarily assembling the electric vehicle battery shell and the cooling plate and placing them in an injection mold, and forming an injection molding space of a specified volume, wherein the injection molding space forms a space connected to the injection molding fixing hole; an injection molding step, filling the injection molding space and the injection molding fixing hole of the injection mold with a preset injection molding material; and a joining completion step, removing the electric vehicle battery shell from the injection mold.

[0012] In one embodiment of the present invention, the cooling plate preparation step may include: a first fixing hole forming step, forming a first fixing hole, wherein the first fixing hole is recessed to a specified depth in the vertical direction from the portion of the electric vehicle battery shell that contacts the cooling plate into the interior of the electric vehicle battery shell, and is continuously formed along the edge of the upper end surface of the electric vehicle battery shell.

[0013] In one embodiment of the present invention, the cooling plate preparation step may include: a second fixing hole forming step, forming a plurality of second fixing holes, wherein the second fixing holes are formed on the cooling plate in contact with the upper surface of the electric vehicle battery shell, and are located at positions corresponding to the first fixing holes, and are continuously formed along the edge of the upper end surface of the electric vehicle battery shell at certain intervals.

[0014] In one embodiment of the present invention, the mold placement step may include: a fixing hole alignment step, after the cooling plate is installed on the upper surface of the electric vehicle battery shell, aligning and fixing the positions of the first fixing hole and the second fixing hole.

[0015] In one embodiment of the present invention, the mold placement step may include: an injection mold insertion step, in which the cooling plate is installed on the injection mold in a form of surrounding the upper surface of the electric vehicle battery shell on which the cooling plate is installed; and an injection mold position fixing step, in which the position of the injection mold is fixed in a manner that the upper surface of the cooling plate is separated from the internal surface of the injection mold by a preset interval.

[0016] Beneficial Effects

[0017] As described above, the cooling plate injection molding joining method for the battery shell frame of an electric vehicle according to the present invention can provide a cooling plate injection molding joining method as described below, which includes a cooling plate preparation step, a mold placement step, an injection molding step and a joining completion step for performing a specific process. Therefore, by changing the joining process between the battery shell frame and the cooling plate in the production process of the battery shell of the electric vehicle, the problems caused by welding deformation can be fundamentally eliminated, and the process efficiency can be improved, and ultimately the cost can be saved and the quality can be improved by improving the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a process schematic diagram showing the form of joining a battery case frame and a cooling plate in a conventional electric vehicle battery case production process.

[0019] Figure 2 1 is a flow chart showing a cooling plate injection bonding method according to an embodiment of the present invention.

[0020] Figure 3 It is shown in detail Figure 2 Flow chart of the mold placement steps of the cooling plate injection molding joining method.

[0021] Figure 4 It is shown by Figure 2 A cross-sectional view of an electric vehicle battery case, a cooling plate and an injection mold prepared by a cooling plate injection molding bonding method according to an embodiment of the present invention.

[0022] Figure 5 It shows that according to Figure 4 The structure shown is a cross-sectional view of the completed cooling plate injection molded joint structure.

[0023] Figure 6 It is shown by Figure 2 A cross-sectional view of an electric vehicle battery case, a cooling plate and an injection mold prepared by a cooling plate injection molding bonding method according to another embodiment of the present invention.

[0024] Figure 7 It shows that according to Figure 6 The structure shown is a cross-sectional view of the completed cooling plate injection molded joint structure.

[0025] Figure 8 It is shown by Figure 2 A cross-sectional view of an electric vehicle battery case, a cooling plate and an injection mold prepared by a cooling plate injection molding bonding method according to another embodiment of the present invention.

[0026] Fig. 9 It shows that according to Figure 8 The structure shown is a cross-sectional view of the completed cooling plate injection molded joint structure.

[0027] Fig.10 It is shown by Figure 2 A cross-sectional view of an electric vehicle battery case, a cooling plate and an injection mold prepared by a cooling plate injection molding bonding method according to another embodiment of the present invention.

[0028] Fig.11 It shows that according to Fig.10 The structure shown is a cross-sectional view of the completed cooling plate injection molded joint structure.

[0029] Reference numerals:

[0030] S100: Injection molding method for cooling plates

[0031] S110: Cooling plate preparation steps

[0032] S111: First fixing hole forming step

[0033] S113: Second fixing hole forming step

[0034] S120: Mold placement step

[0035] S121: Fixing hole alignment steps

[0036] S122: Injection mold insertion step

[0037] S123: Injection mold position fixing step

[0038] S130: Injection molding step

[0039] S140: Joining completion step

[0040] 110: Electric vehicle battery shell

[0041] 111: First fixing hole

[0042] 112: Edge slot

[0043] 114: Fixed gap

[0044] 120: Cooling plate

[0045] 121: Second fixing hole

[0046] 130: Injection mold

[0047] 131: Injection valve

[0048] 132: Groove forming part

[0049] 140: Injection molding DETAILED DESCRIPTION

[0050] Hereinafter, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in this specification and claims should not be interpreted as limited to their conventional or dictionary meanings, but should be interpreted as meanings and concepts that conform to the technical ideas of the present invention.

[0051] Throughout the specification, when it is mentioned that a certain component is "on" another component, it includes not only the case where the certain component is connected to the other component, but also the case where there is another component between the two components. Throughout the specification, unless otherwise clearly stated to the contrary, a part "comprising" a certain constituent element means that it may also include other constituent elements, rather than excluding other constituent elements.

[0052] Figure 2 Detailed description of the invention A flow chart showing a cooling plate injection molding bonding method according to an embodiment of the present invention is shown in FIG.

[0053] Reference Figure 2As a method for joining a battery shell frame and a cooling plate 120 in the production process of an electric vehicle battery shell 110, the cooling plate injection molding joining method S100 of the present embodiment can provide a cooling plate injection molding joining method S100, which includes a cooling plate preparation step S110, a mold placement step S120, an injection molding step S130, and a joining completion step S140 that perform a specific process, thereby improving process efficiency by changing the joining process between the battery shell frame and the cooling plate 120 in the production process of the electric vehicle battery shell 110, and saving costs and improving quality by improving the structure.

[0054] The steps constituting the cooling plate injection bonding method S100 of this embodiment will be described in detail below with reference to the accompanying drawings.

[0055] Figure 3 The details are shown in Figure 2 Flow chart of mold placement steps of the cooling plate injection molding bonding method, Figures 4 to 11 The process pattern diagrams corresponding to each process are shown in FIG.

[0056] Referring to these drawings, according to the cooling plate preparing step S110 of the present embodiment, a process of preparing the battery case 110 and the cooling plate 120 of the electric vehicle and forming injection molding fixing holes on the battery case and the cooling plate 120 is performed.

[0057] Specifically, the cooling plate preparation step S110 may include a first fixing hole forming step S111 and a second fixing hole forming step S113 that perform a specific process. The first fixing hole forming step S111 performs a process of forming a first fixing hole 111, wherein the first fixing hole 111 is recessed from the portion of the electric vehicle battery shell 110 that contacts the cooling plate 120 in a vertical direction to the inside of the electric vehicle battery shell 110 to a specified depth and is continuously formed along the upper end surface edge of the electric vehicle battery shell 110. The second fixing hole forming step S113 performs a process of forming a plurality of second fixing holes, wherein the second fixing holes are formed on the cooling plate 120 that contacts the upper surface of the electric vehicle battery shell 110, and are located at positions corresponding to the first fixing holes 111, and are continuously formed at intervals along the upper end surface edge of the electric vehicle battery shell 110.

[0058] The mold placement step S120 of this embodiment performs the following process: temporarily assembling the electric vehicle battery housing 110 and the cooling plate 120 to place them in the injection mold 130, and forming an injection molding space of a specified volume, wherein the injection molding space forms a space connected to the injection molding fixing hole.

[0059] Specifically, the mold placement step S120 of this embodiment may include a fixing hole alignment step S121, an injection mold insertion step S122, and an injection mold position fixing step S123 that perform a specific process. The fixing hole alignment step S121 performs the following process: after the cooling plate 120 is installed on the upper surface of the electric vehicle battery shell 110, the cooling plate is fixed through the fixing gap 114 of the electric vehicle battery shell 110, and the positions of the first fixing hole 111 and the second fixing hole 121 are aligned and fixed. The injection mold insertion step S122 performs the following process: the cooling plate 120 is installed on the injection mold 130 in the form of surrounding the upper surface of the electric vehicle battery shell 110 on which the cooling plate 120 is installed, and the cooling plate 120 acts as a protective cover for the upper surface of the electric vehicle battery shell 110. The injection mold position fixing step S123 performs the following process: the position of the injection mold 130 is fixed in a manner that the upper surface of the cooling plate 120 is separated from the inner surface of the injection mold 130 by a preset interval.

[0060] According to the injection molding step S130 of this embodiment, the following steps are performed to join the upper surface of the injection mold 130 and the fixed gap 114 by injection molding, and while the injection molding space and the injection molding fixing hole of the injection mold 130 are filled with the preset injection molding material, the fixed gap 114 of the cooling plate 120 is also filled with the injection molding material.

[0061] The joining completion step S140 according to the present embodiment performs the following process to disassemble the electric vehicle battery case 110 from the injection mold 130 .

[0062] Figures 4 to 7 , Fig.10 , Fig.11 The structure disclosed in is a structure in which the cooling plate 120 is protected by an injection molded article without an additional bottom cover. Figure 8 and Fig. 9 The structure disclosed in the embodiment of the present invention requires an additional bottom cover to protect the cooling plate 120 .

[0063] Fig.10 , a cross-sectional view showing an electric vehicle battery case, a cooling plate, and an injection mold prepared by a cooling plate injection molding bonding method according to another embodiment of the present invention is shown, Fig.11 The following shows how to use Fig.10 A cross-sectional view of the completed cooling plate injection molding joint structure shown in FIG.

[0064] Referring to these drawings, the injection mold 130 according to the present embodiment may be a structure that completely surrounds the outer peripheral surface of the electric vehicle battery case 110 and the outer peripheral surface of the cooling plate 120. At this time, the injection material injected through the injection valve 131 of the injection mold 130 can be injected into the outer peripheral surface of the electric vehicle battery case 110 and the upper surface of the cooling plate 120 to form a structure, and at the same time, the cooling plate 120 can be fixed to the electric vehicle battery case 110.

[0065] At this time, the cooling plate 120 can be stably fixed to the frame of the electric vehicle battery case 110 by forming a fixing gap 114 on the frame of the electric vehicle battery case 110 of the aluminum profile structure to fix the cooling plate 120 .

[0066] In this case, the injection molding surrounds the aluminum frame and fills the inside of the frame of the profile structure, thereby improving the overall strength of the structure, preventing water leakage, and ensuring a stable connection between the frames. In other words, the injection molding not only plays a role in connecting the frames, but also plays a role as a bottom cover and a connection to the cooling plate.

[0067] As described above, the cooling plate injection molding joining method S100 for the battery shell frame of an electric vehicle of the present invention can provide a cooling plate injection molding joining method S100, which includes a cooling plate preparation step S110, a mold placement step S120, an injection molding step S130 and a joining completion step S140 for performing a specific process, thereby changing the joining process between the battery shell frame and the cooling plate 120 in the production process of the electric vehicle battery shell 110 to improve the process efficiency, and save costs and improve quality by improving the structure.

[0068] In the above detailed description of the present invention, only the specific embodiments according to the description are described. However, it should be understood that the present invention is not limited to the specific forms mentioned in the detailed description, but should be understood to include all variants and equivalents and substitutes within the spirit and scope of the present invention defined by the appended claims.

[0069] That is, the present invention is not limited to the above-mentioned specific embodiments and descriptions, and technicians in the field of the present invention can make various modifications without departing from the spirit of the present invention requested in the claims, and such modifications are within the scope of protection of the present invention.

Claims

1. A cooling plate injection molding bonding method is a method for bonding a battery shell frame and a cooling plate (120) in a production process of an electric vehicle battery shell (110), characterized in that: include: A cooling plate preparation step (S110), preparing the electric vehicle battery shell (110) and the cooling plate (120), and forming injection molding fixing holes on the battery shell and the cooling plate (120); A mold placement step (S120), temporarily assembling the electric vehicle battery housing (110) and the cooling plate (120) and placing them in an injection mold (130), and forming an injection molding space of a specified volume, wherein the injection molding space forms a space connected to the injection molding fixing hole; Injection molding step (S130), filling the injection molding space and the injection molding fixing hole of the injection mold (130) with a preset injection molding material; as well as In the joining completion step (S140), the electric vehicle battery case (110) is removed from the injection mold (130).

2. The cooling plate injection molding bonding method according to claim 1, characterized in that: The cooling plate preparation step (S110) includes: A first fixing hole forming step (S111) is to form a first fixing hole (111), wherein the first fixing hole (111) is recessed to a specified depth in a vertical direction from a portion of the electric vehicle battery shell (110) in contact with the cooling plate (120) toward the interior of the electric vehicle battery shell (110), and is continuously formed along the edge of the upper end surface of the electric vehicle battery shell (110).

3. The cooling plate injection molding bonding method according to claim 2, characterized in that: The cooling plate preparation step (S110) includes: A second fixing hole forming step (S113) forms a plurality of second fixing holes, wherein the second fixing holes are formed on a cooling plate (120) in contact with an upper surface of the electric vehicle battery shell (110), are located at positions corresponding to the first fixing holes (111), and are continuously formed at intervals along an edge of an upper end surface of the electric vehicle battery shell (110).

4. The cooling plate injection molding bonding method according to claim 3, characterized in that: The mold placement step (S120) includes: A fixing hole alignment step (S121), after the cooling plate (120) is installed on the upper surface of the electric vehicle battery shell (110), the cooling plate is fixed through the fixing gap (114) of the electric vehicle battery shell (110), and the positions of the first fixing hole (111) and the second fixing hole (121) are aligned and fixed.

5. The cooling plate injection molding bonding method according to claim 4, characterized in that: The mold placement step (S120) includes: An injection mold inserting step (S122), in which the cooling plate (120) is installed in the injection mold (130) in a form of surrounding the upper surface of the electric vehicle battery case (110) on which the cooling plate (120) is installed, and the cooling plate (120) serves as a protective cover for the upper surface of the electric vehicle battery case (110); and The injection mold position fixing step (S123) fixes the position of the injection mold (130) in such a way that the upper surface of the cooling plate (120) is separated from the inner surface of the injection mold (130) by a preset interval.

6. The cooling plate injection molding bonding method according to claim 5, characterized in that: In the injection molding step (S130), the upper surface of the injection mold (130) and the fixed gap (114) are injection molded together, and while the injection molding space and the injection molding fixing hole of the injection mold (130) are filled with a preset injection molding material, the fixed gap (114) of the cooling plate (120) is also filled with the injection molding material.

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