Battery cooling plate manufacturing process

Abstract

The present invention discloses a method for manufacturing a battery cooling plate. According to this invention, the coolant in the cooling channel heats or cools the battery cooling plate. The coolant, guided by the injection molding fitting, enters the internal channel of the battery cooling plate to exchange heat with the part to be cooled or heated in contact with the plate, thus meeting the functional requirements of the product. This method does not require the addition of auxiliary materials during welding of the main body, thereby reducing environmental pollution. The product allows for flexible design of plastic fittings, improving thermal efficiency, reducing the size and weight of batteries, and increasing vehicle range and energy efficiency. (Figure 9)

Description

Title of the invention: Method for manufacturing a battery cooling plate. Technical field

[0001] The present invention relates to the field of battery cooling plate manufacturing technology, more specifically, it relates to a method for manufacturing battery cooling plates.

[0002] Prior art

[0003] Currently, battery cooling plates are mainly manufactured using resistance welding to weld the water inlets and outlets to the ends of the battery cooling plate in one piece. After welding, the channels are continuous, and the coolant can flow through the inlets to the outlets, thus carrying away the heat generated by the battery. Since a battery pack requires a large number of cooling flow plates, the energy consumption caused by the brazing process is high, and it is difficult to control its conductive properties. Furthermore, the design freedom of the aluminum joints is limited.

[0004] Battery cooling plates are a cooling system for optimized thermal management of batteries in new energy vehicles. Battery cooling plates and machined fittings are generally assembled by resistance welding. This process requires the use of highly polluting welding filler materials that can contaminate the coolant. This process requires equipment that consumes a lot of energy, pollutes a lot, and has a significant overall weight. In addition, insulation after welding is difficult to achieve.

[0005] Currently, the existing welding process requires the use of an auxiliary flux for the battery cooling plate, which is highly polluting and will contaminate the coolant. The equipment required for this process consumes a lot of energy, is highly polluting, and insulation is difficult to achieve, etc.

[0006] Therefore, in order to resolve the above technical problems, it is necessary to provide a method for manufacturing a battery cooling plate. Description of the invention

[0007] The object of the present invention is to provide a manufacturing method for battery cooling plates that solves the above problems.

[0008] In order to achieve the above objective, the technical solution provided by an embodiment of the present invention is as follows:

[0009] A method for manufacturing a battery cooling plate comprises the following steps:

[0010] SI. Use laser cutting to cut the battery cooling plate to the desired length;

[0011] S2. Use the micro-perforation process to perforate features of micropores on the surface of the battery cooling plate;

[0012] S3. Place the battery cooling plate in the molding equipment by injection molding of fittings, and use of a conduit sealing structure for shaping;

[0013] S4. Weld the battery cooling plate, after injection molding, to the plastic fittings.

[0014] As a further improvement of the present invention, after said step SI, a spraying device is used to spray an insulating material onto the surface of the battery cooling plate, thus performing a surface insulating spray treatment on the battery cooling plate.

[0015] As a further improvement of the present invention, in said step S2, the micro-perforation process consists of using a laser micro-perforation process with the aid of specialized laser equipment to perforate micropore features on the surface of the battery cooling plate, said laser micro-perforation process specifically includes clamping the part, the adsorption treatment and the laser micro-perforation process.

[0016] As a further improvement to the present invention, said specific laser micro-perforation characteristics include a laser speed of 1500 mm / s to 3000 mm / s, a laser power of 500 W to 900 W, a laser frequency of 10 to 40 Hz, a laser current of 50% to 60%, a laser pulse width of 0.01 ms to 0.04 ms and a laser focal length.

[0017] As another improvement of the present invention, said laser microperforation process shall achieve a diameter W of 50 pm to 200 pm, a pore depth of 50 pm to 300 pm, and a pore spacing of 50 pm to 200 pm (axis to axis).

[0018] As another improvement of the present invention, in said step S3, the injection molding equipment includes a mold, a means for feeding and automatic positioning of the battery cooling plate and an injection overmolding process, the injection parameters are a mold temperature of 90 to 120 degrees, a temperature of the battery cooling plate of 90 to 110 degrees, an injection pressure of 100 bar to 130 bar, and a holding pressure of 50 to 100 bar.

[0019] As another improvement of the present invention, in said step S3, the material used for injection has a tensile strength greater than 75 MPa, an elongation greater than 5%, and a plastic melt flow index greater than 10 g / 10 min.

[0020] As a further improvement to the present invention, in said step S4, the welding uses an infrared welding process, comprising the following steps:

[0021] a. a robot takes the battery cooling plate and places it in the tool;

[0022] b. a robot takes the plastic fitting and places it in the tool;

[0023] c. equipment moves the tool to the heating position to perform the welding by heating the product;

[0024] d. Equipment moves the tool to the cooling position to perform cooling and molding of the product.

[0025] As a further improvement to the present invention, the specific characteristics of the heating welding process in said step c include a welding temperature of 200 to 360 °C, a welding pressure of 3 to 6 times the welding area, a welding speed of 1500 mm / s to 2000 mm / s, and a welding displacement of 1 to 2 mm.

[0026] As a further improvement to the present invention, said duct sealing structure adapted in step S3 comprises: a main body mechanism, an interface mechanism and a connection mechanism, the interface mechanism being located at the left end of the main body mechanism, while said connection mechanism is located at the right end of the main body mechanism, said main body mechanism comprising a lower body flat tube, an upper body flat tube, a body connection column, an inner flat tube and a flat tube support, the lower end of the upper body flat tube is fixed to the upper end of the body connection column, and the lower end of said body connection column is fixed to the upper end of the lower body flat tube, said inner flat tube is fixed inside the body flat tube,The left side of the flat tube support is fixed to the left inner wall of the main lower flat tube, and the right side of the flat tube support is fixed to the right inner wall of the main lower flat tube.

[0027] As a further improvement to the present invention, said interface mechanism comprises an interface shell, an interface conduit, an inner interface block, a round mounting block, a flat tube interface, a mounting slot block, a flat tube slot, the left end of said interface shell is fixed to the right end of the inner interface block, the left end of said interface conduit is fixed to the lower right end of the interface shell, the left end of said inner interface block is fixed to the right end of the main mechanism, the rear end of said round fixing block is fixed to the middle of the front and rear ends of said inner interface block, the right end of said flat tube interface is fixed to the middle of the left end of the inner interface block, said mounting slot block is fixed to the middle of the front and rear inner walls of the flat tube interface, and said flat tube slot is fixedly provided in the middle of the left end of the flat tube interface.

[0028] As a further improvement to the present invention, said connecting mechanism comprises a connecting square tube, a first connecting head, a second connecting head, an inner connecting block, a connecting slot block, and a connecting slot; the left end of said connecting square tube is fixed to the middle of the right end of the first connecting head; the left end of said first connecting head is fixed to the right end of the main mechanism; the middle of the left end of said second connecting head is fixed to the right end of the connecting square tube; the left end of said inner connecting block is fixed to the right end of the second connecting head; the two front and rear ends of said connecting slot block are fixed to the middle of the front and rear inner walls of the inner connecting block.and said connection slot is fixedly located in the middle of the right end of the inner connection block.

[0029] Compared to the prior art, the advantages of the present invention lie in the fact that:

[0030] This solution uses the coolant present in the cooling channel to heat or cool the battery cooling plate. The coolant, guided by the injection molding fitting, enters the internal channel of the battery cooling plate to exchange heat with the part to be cooled or heated in contact with the plate, thus meeting the product's functional requirements. This process does not require the addition of auxiliary materials during welding of the main body, which reduces environmental pollution. Furthermore, it offers a high welding success rate, a short production cycle, and significantly reduces product cost. The cleanliness of the products after welding is considerably improved, which helps extend the service life of the thermal management system and reduce the weight of the equipment.The processing equipment is smaller compared to brazing equipment, simple to manufacture, with low energy consumption, a compact production line, and significant energy savings and consumption reductions. The product offers considerable design flexibility for plastic fittings, improving thermal management efficiency and reducing package size. of batteries and reduces the weight of welded products. This significantly improves vehicle range and energy efficiency.

[0031] Description of the attached drawings

[0032] [Fig.1] is a schematic three-dimensional structural diagram of the present invention;

[0033] [Fig.2] is a schematic diagram of the overall structure of the main body mechanism of the present invention;

[0034] [Fig.3] is a schematic front view of the interface mechanism of the present invention;

[0035] [Fig.4] is a schematic structural diagram in rear view of the interface mechanism of the present invention;

[0036] [Fig.5] is a schematic diagram of the overall structure of the connection mechanism of the present invention;

[0037] [Fig.6] is a schematic top structural view of the battery cooling plate of the present invention;

[0038] [Fig.7] is a schematic structural front cross-sectional view of the battery cooling plate of the present invention;

[0039] [Fig.8] is a schematic structural front cross-sectional view of the injection molding fitting of the present invention;

[0040] [Fig.9] is a schematic process flow diagram of the manufacturing process of the present invention;

[0041] [Fig. 10] is a schematic diagram of the state of the micropores of the present invention;

[0042] [Fig. 11] is a schematic diagram of the micropores of the battery cooling plate of the present invention.

[0043] Explanation of figure numbers:

[0044] Main body mechanism 1; Lower body flat tube 101; Upper body flat tube 102; Body connecting column 103; Inner flat tube 104; Flat tube support 105; Interface mechanism 2; Interface shell 201; Interface conduit 202; Inner interface block 203; Round fixing block 204; Flat tube interface 205; Mounting slot block 206; Flat tube slot 207; Connection mechanism 3; Square connection tube 301; First connection head 302; Second connection head 303; Inner connection block 304; Connection slot block 305; Connection slot 306.

[0045] Specific embodiments

[0046] With reference to the drawings attached to the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below; of course, the The embodiments described represent only some of the embodiments of the present invention, and not all of them; the embodiments of the present invention and all other embodiments obtained by a person skilled in the art without creative effort fall within the scope of the protection of the present invention.

[0047] Example of embodiment 1:

[0048] Please refer to FIGS. 1-11, a method for manufacturing a battery cooling plate comprises the following steps:

[0049] S1. Use laser cutting to cut the battery cooling plate to the desired length;

[0050] S2. Use the micro-perforation process to perforate features of micropores on the surface of the battery cooling plate;

[0051] S3. Place the battery cooling plate in the molding equipment by injection molding of fittings, and use of a conduit sealing structure for shaping;

[0052] S4. Weld the battery cooling plate, after injection molding, to the plastic fittings.

[0053] After step SI, spraying equipment is used to spray an insulating material onto the surface of the battery cooling plate, thus performing a surface insulating spray treatment on the battery cooling plate.

[0054] In step S2, the micro-perforation process consists of using a laser micro-perforation process with specialized laser equipment to perforate micropore features on the surface of the battery cooling plate, said laser micropore process specifically includes clamping the part, adsorption treatment and the laser micro-perforation process.

[0055] The specific characteristics of the laser micro-perforation process include a laser speed of 1500 mm / s to 3000 mm / s, a laser power of 500 W to 900 W, a laser frequency of 10 to 40 Hz, a laser current of 50% to 60%, a laser pulse width of 0.01 ms to 0.04 ms and a laser focal length.

[0056] The laser micro-perforation treatment must achieve a diameter W of 50 pm to 200 pm, a pore depth of 50 pm to 300 pm, and a pore spacing of 50 pm to 200 pm (axis to axis).

[0057] In step S3, the injection molding equipment includes a mold, a means for feeding and automatic positioning of the battery cooling plate and an injection overmolding process, the injection parameters are a mold temperature of 90 to 120 degrees, a temperature of the battery cooling plate of 90 to 110 degrees, an injection pressure of 100 bar to 130 bar, and a holding pressure of 50 to 100 bar.

[0058] In step S3, the material used for injection has a tensile strength greater than 75 MPa, an elongation greater than 5%, and a plastic melt flow index greater than 10 g / 10 min.

[0059] In step S4, the welding uses an infrared welding process, comprising the following steps:

[0060] a. a robot takes the battery cooling plate and places it in the tool;

[0061] b. a robot takes the plastic fitting and places it in the tool;

[0062] c. equipment moves the tool to the heating position to perform the welding by heating the product;

[0063] d. Equipment moves the tool to the cooling position to perform cooling and molding of the product.

[0064] The specific characteristics of the heating welding process in said step c include a welding temperature of 200 to 360 °C, a welding pressure of 3 to 6 times the welding area, a welding speed of 1500 mm / s to 2000 mm / s, a welding displacement of 1 to 2 mm.

[0065] The duct sealing structure adapted in step S3 comprises: a main body mechanism 1, an interface mechanism 2 and a connection mechanism 3, the interface mechanism 2 is located at the left end of the main body mechanism 1, while the connection mechanism 3 is located at the right end of the main body mechanism 1, the main body mechanism 1 comprises a lower flat tube of the body 101, an upper flat tube of the body 102, a connecting column of the body 103, an inner flat tube 104 and a flat tube support 105, the lower end of the upper flat tube of the body 102 is fixed to the upper end of the connecting column of the body 103, and the lower end of the connecting column of the body 103 is fixed to the upper end of the lower flat tube of the body 101, the inner flat tube 104 is fixed inside the flat tube of the body,The left side of the flat tube support 105 is fixed to the left inner wall of the main lower flat tube 101, and the right side of the flat tube support 105 is fixed to the right inner wall of the main lower flat tube 101.

[0066] The interface mechanism 2 comprises an interface shell 201, an interface conduit 202, an interface inner block 203, a round fixing block 204, a flat tube interface 205, a mounting slot block 206, a flat tube slot 207, the left end of the interface shell 201 is fixed to the right end of the interface inner block 203, the left end of the interface conduit 202 is fixed to the lower right end of the interface shell 201, the left end of the interface inner block 203 is fixed to the right end of the main mechanism 1, the rear end of the round fixing block 204 is fixed to the middle of the front and rear ends of the interface inner block 203, the right end of the tube interface flat tube 205 is fixed to the middle of the left end of the inner block of interface 203, the mounting slot block 206 is fixed to the middle of the front and rear inner walls of the interface of flat tube 205, and the slot of flat tube 207 is fixed to the middle of the left end of the interface of flat tube 205.

[0067] The connection mechanism 3 comprises a connecting square tube 301, a first connecting head 302, a second connecting head 303, an inner connecting block 304, a connecting slot block 305, and a connecting slot 306; the left end of the connecting square tube 301 is fixed to the middle of the right end of the first connecting head 302; the left end of the first connecting head 302 is fixed to the right end of the main mechanism 1; the middle of the left end of the second connecting head 303 is fixed to the right end of the connecting square tube 301; the left end of the inner connecting block 304 is fixed to the right end of the second connecting head 303; the two front and rear ends of the connecting slot block 305 are fixed to the middle of the front and rear inner walls of the inner connecting block 304.and the connection slot 306 is fixed in the middle of the right end of the inner connection block 304.

[0068] The specific manufacturing process:

[0069] Assemble the cooling channels and cooling fittings together, encapsulating the battery cooling panel by injection; when using the laser micro-perforation method, use specialized laser equipment to create micro-perforation features on the surface of the battery cooling panel, controlling the laser speed, laser power, laser frequency, laser current, laser pulse width and laser focal length; the micro-perforation process includes the following steps: clamping the part, adsorption treatment and the laser micro-perforation process of the part;Monitor welding parameters during the micro-perforation process; welding parameters include laser speed, laser power, laser frequency, laser current, laser pulse width, laser focal length, micropore depth, and micropore spacing; during the laser micro-perforation process, personal protective equipment is required; operators must wear laser safety glasses; when using injection molding, use specialized equipment and a mold to secure the battery cooling panel in the injection encapsulation mold, precisely controlling the injection process temperature, injection pressure, injection speed, and holding pressure; the injection process includes the following steps: part fixation, part heating, part injection, and cooling; For forming; injection parameters include injection temperature, injection pressure, injection speed, and holding pressure; cooling channels on the upper cooling panel are treated by injection molding, using a specialized mold and a suitable injection machine, melting plastic granules and injecting them into the mold to form; the forming process is adjusted according to the product structure and mold design; during the injection molding process, the machine must be protected; the equipment is equipped with a picking robot to remove the molded products from the mold and place them above the conveyor for subsequent operations; potentially hazardous areas of the injection machine must be isolated and protected by a controlled electrical safety switch.

[0070] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered illustrative and not restrictive in any respect, and the scope of the present invention is defined by the appended claims rather than by the above description. It is thus intended that all claims falling within the scope of the claims and all modifications in the meaning and scope of equivalent elements are included in the present invention. No drawing in the claims should be considered as limiting the scope of the corresponding claim.

[0071] Furthermore, it should be understood that although this description is presented in terms of embodiments, each embodiment does not contain only an independent technical solution. This description of the description is solely for clarity, and those skilled in the art should consider the specification as a whole. The technical solutions of each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

Claims

1. A method for manufacturing a battery cooling plate, characterized in that, said manufacturing method comprises the following steps: S1, using laser cutting to cut the battery cooling plate to the desired length; S2, using the micro-perforation process to perforate micropore features on the surface of the battery cooling plate; S3, placing the battery cooling plate in the injection molding equipment for molding the fittings, and using a duct sealing structure for shaping; S4, welding the battery cooling plate, after injection molding, to the plastic fittings.

2. The method for manufacturing a battery cooling plate according to claim 1, characterized in that after said step S1, spraying equipment is used to spray an insulating material onto the surface of the battery cooling plate, thereby performing a surface insulating spray treatment on the battery cooling plate.

3. The method for manufacturing a battery cooling plate according to claim 1, characterized in that in said step S2, the micro-perforation process comprises using a laser micro-perforation process using specialized laser equipment to perforate micropore features on the surface of the battery cooling plate, said laser micro-perforation process specifically comprises workpiece clamping, adsorption processing and laser drilling of micropores.

4. The method for manufacturing a battery cooling plate according to claim 3, characterized in that the specific characteristics of said laser micro-perforation process include a laser speed of 1500 mm / s to 3000 mm / s, a laser power of 500 W to 900 W, a laser frequency of 10 to 40 Hz, a laser current of 50% to 60%, a laser pulse width of 0.01 ms to 0.04 ms and a laser focal length.

5. The method for manufacturing a battery cooling plate according to claim 3, characterized in that said laser micro-perforation treatment is required to achieve a diameter W of 50 pm to 200 pm, a pore depth of 50 pm to 300 pm, and a pore spacing of 50 pm to 200 pm (from axis to axis).

6. The method for manufacturing a battery cooling plate according to claim 1, characterized in that, in said step S3, the injection molding equipment comprises a mold, a means for automatically feeding and positioning the battery cooling plate and an injection overmolding method, the injection parameters are a mold temperature of 90 to 120 degrees, a battery cooling plate temperature of 90 to 110 degrees, an injection pressure of 100 bar to 130 bar, and a holding pressure of 50 to 100 bar.

7. The method for manufacturing a battery cooling plate according to claim 1, characterized in that, in said step S3, the material used for injection has a tensile strength greater than 75 MPa, an elongation greater than 5%, and a plastic melt flow rate greater than 10 g / 10 min.

8. The method for manufacturing a battery cooling plate according to claim 1, characterized in that, in said step S4, the welding uses an infrared welding method, comprising the following steps: a. a robot takes the battery cooling plate and places it in the tool; b. a robot takes the plastic fitting and places it in the tool; c. equipment moves the tool to the heating position to perform heating welding of the product; d. equipment moves the tool to the cooling position to perform cooling and molding of the product.

9. The method of manufacturing a battery cooling plate according to claim 8, characterized in that, the specific characteristics of the heating welding process in said step c include a welding temperature of 200 to 360 °C, a welding pressure of 3 to 6 times the welding area, a welding speed of 1500 mm / s to 2000 mm / s, a welding displacement of 1 to 2 mm.

10.

11. The battery cooling plate according to claim 1, characterized in that, said conduit sealing structure adapted in step S3 comprises: a main body mechanism (1), an interface mechanism (2) and a connection mechanism (3), the interface mechanism (2) is located at the left end of the main body mechanism (1), while said connection mechanism (3) is located at the right end of the main body mechanism (1), said main body mechanism (1) comprises a body lower flat tube (101), a body upper flat tube (102), a body connection column (103), an inner flat tube (104) and a flat tube holder (105), the lower end of the body upper flat tube (102) is fixed to the upper end of the body connection column (103), and the lower end of said body connection column (103) is fixed to the upper end of the body lower flat tube (101),said inner flat tube (104) is fixed inside the body flat tube, the left side of the flat tube holder (105) is fixed to the left inner wall of the main lower flat tube (101), and the right side of the flat tube holder (105) is fixed to the right inner wall of the main lower flat tube (101)., The battery cooling plate according to claim 10, characterized in that, said interface mechanism (2) comprises an interface shell (201), an interface pipe (202), an interface inner block (203), a round fixing block (204), a flat tube interface (205), a mounting slot block (206), a flat tube slot (207), the left end of said interface shell (201) is fixed to the right end of the interface inner block (203), the left end of said interface pipe (202) is fixed to the lower right end of the interface shell (201), the left end of said interface inner block (203) is fixed to the right end of the main mechanism (1), the rear end of said round fixing block (204) is fixed to the middle of the front and rear ends of said interface inner block (203),the right end of said flat tube interface (205) is fixed in the middle of the left end of the interface inner block (203), said mounting slot block (206) is fixed in the middle of the front and rear inner walls of the flat tube interface (205), and said,

12. flat tube slot (207) is fixedly provided in the middle of the left end of the flat tube interface (205). The battery cooling plate according to claim 10, characterized in that, said connection mechanism (3) comprises a square connection tube (301), a first connection head (302), a second connection head (303), a connection inner block (304), a connection slot block (305), and a connection slot (306), the left end of said square connection tube (301) is fixed to the middle of the right end of the first connection head (302), the left end of said first connection head (302) is fixed to the right end of the main mechanism (1), the middle of the left end of said second connection head (303) is fixed to the right end of the square connection tube (301), the left end of said inner connection block (304) is fixed to the right end of the second connection head (303),the two front and rear ends of said connection slot block (305) are fixed in the middle of the front and rear inner walls of the connection inner block (304), and said connection slot (306) is fixedly provided in the middle of the right end of the connection inner block (304).,

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