Connecting structure, process and mold for end cover and plate body of battery cooling plate, and battery cooling plate

Abstract

The invention discloses a connecting structure, process and mold for an end cover and a plate body of a battery cooling plate, the connecting structure of the battery cooling plate comprises an interface piece connected with the plate body, an outer shell and a sealing piece, the sealing piece is arranged around a connecting gap between the interface piece and the plate body, and at least partial area of the sealing piece is located on the outer surface of the plate body. A liquid inlet and outlet flow channel is formed in the connector piece in the length direction of the connector piece, the liquid inlet and outlet flow channel can be communicated with the liquid inlet and outlet and / or the cooling flow channel, machining holes are formed in the positions, at the two ends of the connector piece, of the liquid inlet and outlet flow channel, and the outer shell is located on the surface, away from the plate body, of the connector piece. The outer shell is further provided with a blocking arm extending towards the side close to the plate body, and the blocking arm can extend to block the machining hole. According to the battery cooling plate, the end cover and the plate body are integrally connected in an injection molding manner, so that the problem of leakage at a welding site is thoroughly solved, the service life of the battery cooling plate is effectively prolonged, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a connection structure, a process and a mold of an end cover and a plate body of a battery cooling plate, and a battery cooling plate. Background Art

[0002] In new energy vehicles, battery cooling plates are often required to cool the battery pack. Several harmonica plates are installed within the cooling plate to form a flow path for the coolant. To improve heat transfer efficiency and reduce vehicle weight, the cooling plate's body and end caps are typically made of aluminum. The end caps and body are then welded together.

[0003] However, as the use time increases, leakage will inevitably occur at the welds, which poses a huge safety hazard to the power system and even the safety of the entire vehicle and will cause huge economic losses. Therefore, how to improve the long-term and effective sealing of the end cover and the plate body is still a pain point problem faced by the industry. Summary of the Invention

[0004] To address the aforementioned technical issues, the present invention provides a battery cooling plate end cap and plate body connection structure, process, and mold, as well as a battery cooling plate. The battery cooling plate end cap and plate body connection structure of the present invention eliminates the need for welding the end cap to the plate body, fundamentally solving the problem of weld leakage.

[0005] One of the purposes of the present invention is to provide a connection structure between the end cover and the plate body of a battery cooling plate, including an inlet and outlet, and a cooling channel is arranged in the plate body, which includes: an interface part, wherein the interface part has an inlet and outlet liquid channel arranged along the length direction of the interface part, and the inlet and outlet liquid channel can be respectively connected to the inlet and outlet and / or the cooling channel, and the inlet and outlet liquid channel has a processing hole at both ends of the interface part, and a baffle is also provided on the inner side wall of the processing hole; an outer shell, which is located on the surface of the interface part away from the plate body , a barrier arm extending toward a side close to the plate body is also provided on the outer shell, and the barrier arm can extend to block the processed hole; a sealing member, the sealing member is respectively connected to the interface member and the plate body, the sealing member is arranged around the connection gap between the interface member and the plate body, at least part of the area of the sealing member is located on the outer surface of the plate body, the interface member is a pre-processed interface member, the outer shell is integrally connected to the interface member after injection molding, and the sealing member is integrally connected to the interface member and the plate body after injection molding.

[0006] The present invention has the following beneficial effects: ① This application changes the existing method of connecting the end cap of the battery cooling plate to the plate body by welding, and instead uses injection molding to form an integral structural form of the end cap and the plate body. Therefore, the problem of leakage at the welding point is completely solved, the service life of the battery cooling plate is effectively extended, and the cost is reduced; ② This application greatly reduces the processing difficulty by first pre-processing the interface component with the internal flow channel structure and then performing injection molding of the outer shell and the sealing component; ③ The present application forms machining holes at both ends of the inlet and outlet liquid flow channels, thereby facilitating the formation of machining positions at the machining holes during machining of the interface member, thereby greatly reducing the difficulty of machining the interface member. At the same time, by providing a blocking arm structure on the outer shell, the surface of the machining holes located outside the blocking plate can be blocked during injection molding of the outer shell, and the interface member and the blocking plate can be connected by injection molding, thereby allowing the outer shell and the interface member to be injection molded as an integral part. ④ The sealing member of the present application is in a shape arranged in the outer circumferential direction of the plate body and is fitted to the outer surface of the plate body. Therefore, after the sealing member is injection-molded, an edge can be formed on the interface member extending away from the outer shell, so that the interface member and the plate body form a stable connection and good sealing.

[0007] Furthermore, the interface component further comprises a first tubular member for forming the liquid inlet and outlet, and the outer shell comprises a second tubular member for forming the liquid inlet and outlet. The first and second tubular members have arc-shaped cross-sections perpendicular to the axial direction, and the first and second tubular members together form the liquid inlet and outlet. Therefore, by separating the liquid inlet and outlet into the first and second tubular members and placing them on the interface component and the outer shell, respectively, and forming them separately, the difficulty of manufacturing the interface component and the outer shell is reduced.

[0008] Furthermore, a first hole is provided on the side of the interface member near the outer shell, and a second hole is provided on the side of the interface member near the plate body, communicating with the cooling channel. Thus, coolant in the cooling channel within the plate body flows through the second hole into the inlet and outlet channels, and then through the first hole to connect with the inlet and outlet ports, thereby enabling coolant to flow between the two ends of the cooling plate.

[0009] Furthermore, the inlet and outlet liquid flow channels include a first flow channel and a second flow channel that are not interconnected. The first flow channel and the second flow channel are arranged along the length direction of the interface part. The first flow channel is provided with the first hole body and the second hole body; the second flow channel is provided with the second hole body. Therefore, due to the relatively complex structural arrangement of the first flow channel and the second flow channel on the interface part, and the need to provide the first hole body and the second hole body, it is necessary to pre-process and form the interface part in advance, and then separately perform injection molding with the outer shell and the sealing part to form an integral body. Therefore, by dividing the injection molding into two steps, the processing of the internal channel structure of the end cover can be satisfied, and the overall connection stability of the interface part, the outer shell and the sealing part with the plate body can be ensured.

[0010] Furthermore, the interface component is injection molded and then connected to the outer shell and the sealing component. The interface component can be made of the same material as the outer shell and the sealing component, or a different material. For example, it can be made of polycarbonate (PC), polyimide (PI), or polyetheretherketone (PEEK).

[0011] Furthermore, the interface component, the outer shell and the sealing component are all made of PPS.

[0012] Furthermore, the interface component is made of the same material as the outer shell and the sealing component, thereby achieving better structural stability among the interface component, the outer shell and the sealing component.

[0013] Furthermore, the interface part has at least one first groove on its side surface close to the outer shell, and the first groove is recessed toward the side away from the outer shell; at least one half-groove is also provided near the edge of the interface part, and the half-groove has a first groove area and a second groove area, and the groove depth of the second groove area is greater than that of the first groove area. That is, the width of the second groove area along the thickness direction of the battery cooling plate is greater than that of the first groove area. Therefore, when the outer shell is injection-molded, the injection molding liquid enters the first groove area and forms a more stable connection structure with the interface part; and the groove depth of the second groove area is greater than that of the first groove area. Therefore, when the outer shell is injection-molded to the interface part, the injection molding liquid can form a hook-like structure in the first groove area and the second groove area, thereby ensuring the structural stability and integrity of the outer shell and the interface part after injection molding.

[0014] Furthermore, a first connecting protrusion is provided on the side of the interface component located away from the outer shell, away from the machined hole, and second connecting protrusions are provided at both ends of the sealing component. The first connecting protrusion and the second connecting protrusion partially overlap, and the width of the second connecting protrusion in the direction of the plate thickness is less than the width of the main body of the sealing component. The width of the first connecting protrusion in the direction of the plate thickness is less than the width of the second connecting protrusion in the same direction. Therefore, by providing first and second connecting protrusions of different sizes and setting the width of the first connecting protrusion in the direction of the plate thickness to be less than the width of the second connecting protrusion in the same direction, when the outer shell is injection molded, the injection molding liquid will be poured outside the first and second connecting protrusions, forming connection points with the interface component and the sealing component during injection molding.

[0015] Furthermore, a narrow groove is provided along the length of the tube wall on the edge of the first tubular member near the outer shell, so that during injection molding of the outer shell, the injection molding liquid can enter the narrow groove and form a stable injection molding connection structure with the first tubular member.

[0016] A second object of the present invention is to provide a battery cooling plate, comprising the aforementioned connection structure between the end cover and the plate body of the battery cooling plate.

[0017] A third object of the present invention is to provide a mold for integrally injection-molding the aforementioned outer shell and seal with the interface member and plate body.

[0018] A fourth object of the present invention is to provide a process for machining the connection structure between the end cap and the plate body of the aforementioned battery cooling plate, comprising the following steps: S01: Pre-forming the interface component; S02: placing one end of the plate body close to the interface component together with the interface component in a mold cavity, and then, after the mold is closed, forming an injection molding cavity for the outer shell and the sealing component in an area outside the plate body and the interface component in the mold cavity; S03: Injecting molding liquid into the area of the mold cavity corresponding to the outer shell and the sealing component to injection-mold the outer shell and the sealing component, and integrally connect them with the interface component and the plate body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the connection structure between the end cover and the plate body of the battery cooling plate according to the first embodiment of the present invention. In the figure, a broken line indicates that a portion of the plate body structure along its length direction is omitted. Figure 2 This is a schematic side view of the battery cooling plate according to the second embodiment of the present invention; Figure 3 for Figure 2 The local structure cross-section view in the AA direction; Figure 4 Schematic diagram of the connection relationship between the interface component, the outer shell and the sealing component of the present invention; Figure 5 Schematic diagram of the three-dimensional structure of the interface component of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the interface component and the sealing component after being connected; Figure 7 It is a schematic diagram of the three-dimensional structure of the outer shell of the present invention; Figure 8 This is a schematic diagram of the positional relationship between the mold and the plate body when the mold of Example 3 is used to process the connection structure between the end cover and the plate body of the battery cooling plate.

[0020] In the picture: 1. Liquid inlet and outlet; 2. Plate body; 21. Harmonica plate; 22. Cooling channel; 3. Interface member; 311. Slot; 312. First flow channel; 313. Second flow channel; 32. Processed hole; 33. Block; 34. First hole body; 35. Second hole body; 36. First slot body; 37. Protrusion; 371. Stepped groove; 38. Half slot body; 381. First slot body area; 382. Second slot body area; 39. First connecting protrusion; 310. First tubular member; 4. Outer shell; 41. Stop arm; 42. Second tubular member; 5. Sealing member; 51. Second connecting protrusion. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0022] Example 1: See attached Figure 1-7 As shown, this embodiment is a connection structure between the end cover and the plate body 2 of a battery cooling plate, including a liquid inlet and outlet 1, a cavity is provided in the plate body 2, and a plurality of cooling channels 22 are formed by arranging a plurality of harmonica plates 21 spaced apart from each other in the cavity (see the attached Figure 3 The connection structure between the end cap and the plate body 2 of this embodiment includes an interface member 3 connected to the plate body 2, an outer shell 4, and a sealing member 5. The sealing member 5 is arranged around the connection gap between the interface member 3 and the plate body 2 and is used to seal the connection gap between the interface member 3 and the plate body 2. At least a portion of the sealing member 5 is located on the outer surface of the plate body 2.

[0023] A cavity is provided inside the plate body 2, and a plurality of harmonica plates 21 are provided in the cavity along the length direction of the plate body 2. The interface member 3 is connected to the ends of the plate body 2 in the length direction, and an inlet and outlet liquid flow channel is provided inside the interface member 3 along the length direction of the interface member 3. The inlet and outlet liquid flow channel can be respectively connected to the inlet and outlet port 1 and / or the cooling flow channel 22. The inlet and outlet liquid flow channel forms a processing hole 32 at both ends of the interface member 3 (see Figure 6 ), a baffle 33 is further provided on the inner side wall of the processing hole 32. The present application provides a baffle 33 on the inner side wall of the processing hole 32 (see Figure 6 ), so that during the injection molding of the outer shell 4, the injection liquid will not enter the liquid inlet and outlet channels inside the interface 3 from the processing hole 32. The outer shell 4 is located on the surface of the interface 3 away from the plate 2, and a blocking arm 41 extending toward the side close to the plate 2 is also provided on the outer shell 4 (see Figure 7 ), the blocking arm 41 can extend to seal the surface of the processing hole 32 located on the outside of the blocking piece 33, and is injection-molded with the interface part 3 and the blocking piece 33, so that the outer shell 4 and the interface part 3 are injection-molded into an integral part; the sealing part 5 is respectively connected to the interface part 3 and the plate body 2, and the sealing part 5 is connected to the side of the interface part 3 away from the outer shell 4, and is located between the interface part 3 and the plate body 2. After injection molding, the outer shell 4 is integrally connected with the interface part 3, and the sealing part 5 is integrally connected with the interface part 3 and the plate body 2 after injection molding.

[0024] When processing and installing the connection structure between the end cover and the plate body 2 of this embodiment, the interface part 3 is first pre-processed, and after the interface part 3 and the end of the plate body 2 are preliminarily pre-connected, it is placed in the mold, and then the outer shell 4 is injection molded and connected as a whole with the interface part 3; and the sealing part 5 is injection molded and connected as a whole with the interface part 3 and the plate body 2.

[0025] In some embodiments, the interface member 3, the outer shell 4 and the sealing member 5 together form an end cap structure (see FIG. Figure 4 ), after injection molding, the three parts present the structural appearance of an integral part.

[0026] The connection structure between the end cover and the plate body 2 of the battery cooling plate of the present application does not use welding to connect the end cover and the plate body 2, but instead uses injection molding to form an integrally connected structure of the end cover and the plate body 2. Therefore, the problem of leakage at the welding point is completely solved, the service life of the battery cooling plate is effectively extended, and the cost of raw material use is reduced.

[0027] It should be noted here that if the entire end cap structure is directly injection molded in one step, it will be extremely difficult to process because it has a large number of channel structures inside. However, the present application sets the inlet and outlet liquid flow channels in the end cap for conducting with the plate body 2 on the interface part 3, and then performs injection molding of the outer shell 4 and the sealing part 5 with the interface part 3 and the plate body 2. This not only reduces the processing difficulty of the injection molding process, but also makes the sealing and integrity of the connection structure between the end cap and the plate body 2 higher. Since the interface part 3 has inlet and outlet liquid flow channels, and the inlet and outlet liquid flow channels are formed into processing holes 32 at both ends of the interface part 3, it is convenient to form a processing position at the position of the processing hole 32 when processing the interface part 3, which facilitates the processing of the channels inside the interface part 3, thereby greatly reducing its processing difficulty. Otherwise, if the processing hole 32 is not set, the inlet and outlet liquid flow channels are located inside the end cap, making processing more difficult. At the same time, by providing a blocking arm 41 structure on the outer shell 4, the processing hole 32 can be blocked, so that after the outer shell 4 and the interface component 3 are injection molded into an integral part, the processing hole 32 can be blocked to form an inlet and outlet liquid flow channel.

[0028] The sealing member 5 of the present application is shaped so as to surround the outer circumferential direction of the plate body 2 and is fitted to the outer surface of the plate body 2. Therefore, after the sealing member 5 is injection-molded, an edge can be formed on the interface member 3 extending away from the outer shell 4, so that the interface member 3 and the plate body 2 form a stable connection and good sealing.

[0029] In some embodiments, the interface member 3 further includes a first tubular member 310 for forming the liquid inlet and outlet 1, and the outer shell 4 includes a second tubular member 42 for forming the liquid inlet and outlet 1. The first tubular member 310 and the second tubular member 42 together form the liquid inlet and outlet 1. The first tubular member 310 and the second tubular member 42 have an arc-shaped cross-section perpendicular to the axial direction. Therefore, by splitting the liquid inlet and outlet 1 into the first tubular member 310 and the second tubular member 42 and arranging them on the interface member 3 and the outer shell 4 for separate molding, the processing difficulty of each component is reduced and the overall processing efficiency of the connection structure between the end cap and the plate body 2 is improved.

[0030] In some embodiments, see Figure 5 As shown, a narrow groove 311 is provided along the length of the tube wall on the edge of the first tubular member 310 near the outer shell 4. Therefore, when the outer shell 4 is injection molded, the injection liquid can enter the narrow groove 311 and form a stable injection-molded connection structure with the first tubular member 310.

[0031] In some embodiments, a first hole 34 is provided on one side of the interface member 3 close to the outer shell 4 (see Figure 3), a second hole 35 communicating with the cooling channel 22 is provided on one side of the interface member 3 close to the plate body 2. In some embodiments, the first hole 34 is formed at the location of the first tubular member 310.

[0032] In some embodiments, the inlet and outlet liquid flow channels include a first flow channel 312 and a second flow channel 313 that are not interconnected. The first flow channel 312 and the second flow channel 313 are arranged along the length direction of the interface member 3. A first hole body 34 and a second hole body 35 are arranged on the first flow channel 312; and a second hole body 35 is arranged on the second flow channel 313. Therefore, since the interface member 3 has a relatively complex structural arrangement of the first flow channel 312 and the second flow channel 313, and the first hole body 34 and the second hole body 35 also need to be arranged, the difficulty of pre-processing the interface member 3 in advance and then performing integral molding by injection molding with the outer shell 4 and the seal 5 is greatly reduced. In some embodiments, the first flow channel 312 and the second flow channel 313 of the connection structure between the end cover at both ends of the cooling plate and the plate body 2 are arranged in a staggered form, that is, as shown in FIG. Figure 3 As shown, in Figure 3 The first flow channel 312 at the lower end is located near Figure 3 The area on the left side, while the opposite end ( Figure 3 The first flow channel 312 of the upper end of the cooling plate is located in the area close to the right side of the figure, so that the coolant can flow from the cooling plate to the cooling plate. Figure 3 The lower end of the first flow channel 312 enters the plate body 2, and then passes through Figure 3 The first flow channel 312 at the upper end flows out to Figure 3 The liquid inlet and outlet 1 at the upper end of the cooling plate is provided to achieve the flow effect of the cooling liquid in each cooling channel 22 in the cooling plate.

[0033] In some embodiments, the interface member 3 is prefabricated and then injection molded together with the outer shell 4 and the sealing member 5. The material of the interface member 3 is not particularly limited and can be the same as or different from that of the outer shell 4 and the sealing member 5.

[0034] In some embodiments, the interface component 3 and outer shell 4 are made of PPS. PPS stands for "polyphenylene sulfide." Alternatively, the interface component 3 and outer shell 4 may be made of an injection molding material with excellent high-temperature resistance and mechanical strength, such as polycarbonate (PC), polyimide (PI), or polyetheretherketone (PEEK).

[0035] In some embodiments, the interface member 3 is made of the same material as the outer shell 4 and the sealing member 5, namely PPS, so that the connection structure between the end cap and the plate body 2 has better integral structural stability after injection molding.

[0036] In some embodiments, the surface of one side of the interface member 3 close to the outer shell 4 has at least one first groove 36 (see Figure 5 ), the first groove 36 is recessed toward the side away from the outer shell 4. In some embodiments, the first grooves 36 are provided along the length of the interface member 3, and may be one, two, three, or more. They may be provided on both sides of the first tubular member 310. Therefore, during injection molding of the outer shell 4, the molding liquid enters the first grooves 36, forming a more stable connection structure with the interface member 3.

[0037] In some embodiments, a protrusion 37 is provided in the area of the interface member 3 for arranging the first tubular member 310, which protrudes toward the outer shell 4. The protrusion 37 can provide a space for arranging the first tubular member 310. At least one half-slot 38 is also provided at the upper and lower edges of the protrusion 37 near the interface member 3 (see the attached FIG. Figure 5 and attached Figure 6 ), the half tank body 38 has a first tank body area 381 and a second tank body area 382, the tank body depth of the second tank body area 382 is greater than the first tank body area 381, that is, the second tank body area 382 is along the thickness direction of the battery cooling plate (along Figure 6 The width of the second groove section 382 (in the direction of the straight arrows arranged in the vertical direction) is greater than that of the first groove section 381. The groove depth of the second groove section 382 is greater than that of the first groove section 381. Therefore, when the outer shell 4 is injection-molded onto the interface component 3, the injection molding liquid can form a hook-like structure in the first groove section 381 and the second groove section 382, thereby ensuring the structural stability and integrity of the outer shell 4 and the interface component 3 after injection molding.

[0038] In some embodiments, a circular stepped groove 371 is further provided in the area of the protrusion 37 close to the first tubular member 310, that is, the groove body includes two stepped groove body structures nested in each other, thereby forming a more secure structure when the outer shell 4 and the interface member 3 are injection molded.

[0039] In some embodiments, see Appendix Figure 6 A first connecting protrusion 39 is further provided on the side of the interface member 3 located away from the outer shell 4 and at both ends of the sealing member 5. A second connecting protrusion 51 is further provided. Part of the first connecting protrusion 39 overlaps with a portion of the second connecting protrusion 51. The second connecting protrusion 51 extends in the direction of the thickness of the plate 2 ( Figure 6The width of the first connecting protrusion 39 in the direction of the thickness of the plate body 2 is smaller than the width of the second connecting protrusion 51 in the same direction. By providing first connecting protrusions 39 and second connecting protrusions 51 of different sizes, and setting the width of the first connecting protrusion 39 in the direction of the thickness of the plate body 2 to be smaller than the width of the second connecting protrusion 51 in the same direction, during the injection molding of the barrier arm 41 structure of the outer shell 4, the injection molding liquid is poured outside the first connecting protrusion 39 and the second connecting protrusion 51, and respectively forms connection points with the interface component 3 and the sealing component 5 during the injection molding, thereby forming an integrated structure between the outer shell 4, the interface component 3, the sealing component 5 and the plate body 2, and preventing damage or leakage at the connection between the plate body 2 and the end cover of the cooling plate.

[0040] In some embodiments, see Figure 7 As shown, the cross section of the retaining arm 41 is arc-shaped, that is, the retaining arm 41 can achieve a semi-enclosed connection between the first connecting protrusion 39 and the second connecting protrusion 51. Through this structural design, a stable connection structure can be formed between the outer shell 4, the interface part 3 and the sealing part 5.

[0041] Example 2: See attached Figure 3 and attached Figure 4 As shown, this embodiment is a battery cooling plate, which includes the connection structure between the end cover and the plate body 2 of the battery cooling plate of the first embodiment.

[0042] In some embodiments, the first flow channel 312 and the second flow channel 313 of the connection structure between the end caps at both ends of the battery cooling plate and the plate body 2 are arranged in a staggered manner, that is, Figure 3 As shown, in Figure 3 The first flow channel 312 at the lower end thereof is located in the area close to the left side of the figure, and the opposite end thereof ( Figure 3 The first flow channel 312 of the upper end of the cooling plate is located in the area close to the right side of the figure, so that the coolant can flow from the cooling plate to the cooling plate. Figure 3 After the lower end of the first flow channel 312 enters the plate body 2, Figure 3 The first flow channel 312 at the upper end flows out to Figure 3 The liquid inlet and outlet 1 at the upper end of the cooling plate is provided to achieve the effect of the coolant flowing in the cooling plate.

[0043] Example 3: See attached Figure 8As shown, this embodiment is a mold used for integrally injection-molding the outer housing 4 and sealing member 5 of the first embodiment with the interface member 3 and the plate body 2. The mold cavity comprises a space for accommodating the interface member 3 and the end of the plate body 2 near one end of the interface member 3, as well as a space for forming the outer housing 4 and sealing member 5. At least one injection liquid inlet is provided for each of the outer housing 4 and sealing member 5. When using the mold of this embodiment, the end of the plate body 2 connected to the interface member 3 and the interface member 3 are first placed in the mold cavity. Then, the outer housing 4 and sealing member 5 are simultaneously injection-molded through the injection liquid inlets.

[0044] In some embodiments, an injection liquid inlet is provided on both sides of the cooling plate in the width direction for injection molding of the outer shell 4; an injection liquid inlet is provided on both sides of the cooling plate in the width direction for injection molding of the seal 5.

[0045] Example 4: This embodiment is a process for processing the connection structure between the end cover and the plate body 2 of the battery cooling plate of Example 1, including the following steps: S01: Pre-processing the interface part 3; S02: placing the end of the plate body 2 close to the interface part 3 together with the interface part 3 in the mold cavity. Then, after the mold is closed, an injection molding cavity for the outer shell 4 and the sealing part 5 is formed in the area outside the plate body 2 and the interface part 3 in the mold cavity; S03: Injecting molding liquid into the area corresponding to the outer shell 4 and the sealing member 5 in the mold cavity to injection-mold the outer shell 4 and the sealing member 5 and integrally connect them with the interface member 3 and the plate body 2 .

[0046] In step S01, the interface component 3 can be pre-formed by injection molding, blow molding or machining. The material of the interface component 3 can be the same as or different from that of the outer shell 4 or the sealing component 5, but the outer shell 4 and the sealing component 5 are made of the same material.

[0047] In some embodiments, the outer housing 4 and seal 5 are simultaneously injection molded, but the outer housing 4 and seal 5 are injection molded using separate injection liquid inlets. An injection liquid inlet is provided on either side of the width of the cooling plate in the region corresponding to the outer housing 4. An injection liquid inlet is provided on either side of the width of the cooling plate in the region corresponding to the seal 5. Thus, the outer housing 4 and seal 5 can be injection molded from opposite sides of their respective mold cavities.

[0048] The above embodiments are only for illustrating the technical concept and features of the present invention. Its purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. It cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A connection structure between the end cover and the plate body of a battery cooling plate, comprising a liquid inlet and outlet, a cooling channel being provided in the plate body, characterized in that: include: An interface member having an inlet and outlet liquid flow channel arranged along the length direction of the interface member, the inlet and outlet liquid flow channel being able to communicate with the inlet and outlet liquid ports and / or the cooling flow channel respectively, the inlet and outlet liquid flow channel forming a machined hole at both ends of the interface member, and a baffle being further provided on the inner side wall of the machined hole; An outer shell, the outer shell being located on a surface of the interface member away from the plate body, and further provided with a blocking arm extending toward a side close to the plate body, the blocking arm being capable of extending to block the processed hole; A sealing member, wherein the sealing member is connected to the interface member and the plate body respectively, the sealing member is arranged around the connection gap between the interface member and the plate body, and at least a part of the sealing member is located on the outer surface of the plate body, The interface part is a pre-formed interface part, the outer shell is integrally connected with the interface part after injection molding, and the sealing part is integrally connected with the interface part and the plate body after injection molding.

2. The connection structure between the end cover and the plate body of the battery cooling plate according to claim 1, characterized in that: The interface component also has a first tubular component for forming the liquid inlet and outlet, and the outer shell has a second tubular component for forming the liquid inlet and outlet. The cross-sections of the first tubular component and the second tubular component perpendicular to the axial direction are arc-shaped, and the first tubular component and the second tubular component together form the liquid inlet and outlet.

3. The connection structure between the end cover and the plate body of the battery cooling plate according to claim 1, characterized in that: A first hole is provided on one side of the interface component close to the outer shell, and a second hole communicated with the cooling channel is provided on one side of the interface component close to the plate.

4. The connection structure between the end cover and the plate body of the battery cooling plate according to claim 3, characterized in that: The inlet and outlet liquid flow channels include a first flow channel and a second flow channel that are not interconnected. The first flow channel and the second flow channel are arranged along the length direction of the interface component. The first flow channel is provided with the first hole body and the second hole body; the second flow channel is provided with the second hole body.

5. The connection structure between the end cover and the plate body of the battery cooling plate according to any one of claims 1 to 4, characterized in that: The interface component is injection-molded and then connected with the outer shell and the sealing component by injection molding.

6. The connection structure between the end cover and the plate body of the battery cooling plate according to claim 5, characterized in that: The interface component and the outer shell are made of PPS.

7. The connection structure between the end cover and the plate body of the battery cooling plate according to claim 6, characterized in that: The interface component is made of the same material as the outer shell and the sealing component.

8. A battery cooling plate, characterized in that: A connection structure between an end cover and a plate body of a battery cooling plate comprising the structure described in any one of claims 1 to 7.

9. A mold, characterized in that: Used for integrally injection molding the outer shell and the sealing component described in any one of claims 1 to 7 with the interface component and the plate body.

10. A process for machining the connection structure between the end cover and the plate body of the battery cooling plate according to any one of claims 1 to 7, characterized in that: The steps include: S01: Pre-forming the interface component; S02: placing one end of the plate body close to the interface component together with the interface component in a mold cavity, and then, after the mold is closed, forming an injection molding cavity for the outer shell and the sealing component in an area outside the plate body and the interface component in the mold cavity; S03: Injecting molding liquid into the area of the mold cavity corresponding to the outer shell and the sealing component to injection-mold the outer shell and the sealing component, and integrally connect them with the interface component and the plate body.

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