Flat plate type energy storage box body machining method

Abstract

The invention discloses a flat plate type energy storage box body machining method which comprises the following steps that firstly, two plates are spliced and welded together, length milling is conducted on the plates spliced and welded together through a CNC numerical control machine tool, the plates are milled to the specified length, and meanwhile runner reinforcing ribs of the plates are milled off; then, according to the flow channel width of the plate, front and rear plug models are milled through a CNC numerical control machine tool, and then a water inlet channel and a water outlet channel are separately machined in the front plug. Two liquid cooling plate profiles are welded together, and then a CNC numerical control machine tool is used for milling parts one by one till the specified modeling requirement is met. According to the energy storage box, the liquid cooling plate profile is milled, then the milled parts are sequentially welded to the liquid cooling plate profile, and the pull willow nuts are installed, so that the requirements for light weight, load bearing and heat dissipation of the energy storage box are met, the defects that an existing flat plate type energy storage box is complex in machining technology and large in weight are overcome, and meanwhile the cost of the flat plate type energy storage box can be conveniently controlled.

Description

Technical Field

[0001] The invention relates to the technical field of electric energy storage equipment, and in particular to a method for processing a flat-plate energy storage box. Background Art

[0002] The flat energy storage box is a box-type structure designed specifically for energy storage systems. It is mainly used to accommodate core components such as battery packs, battery management systems (BMS), and energy management systems (EMS). It has protection, heat dissipation, and electrical installation functions. It has good load-bearing capacity and low mold opening costs, and is widely used in current energy storage systems.

[0003] Existing flat-plate energy storage boxes generally adopt a rectangular or flat-plate design, so that they can be flexibly adjusted according to the energy storage capacity and adapted to different installation scenarios. At the same time, they use a modular structure, which is formed by extruding aluminum profiles or welding galvanized steel plates. The interior is divided into functional areas such as battery rooms and equipment rooms. Each unit is isolated and has no exposed live parts, thereby improving safety. However, the existing aluminum extrusion energy storage box processing technology is relatively complicated. The box generally uses aluminum alloy or galvanized steel plate. Although it can ensure structural strength, its high density makes it difficult to reduce the unit volume weight, and there is a redundant structural design. Generally, it is necessary to add support parts or thicken the side panels, which further increases the overall weight, resulting in the defect of heavy weight. In addition, the heavy weight will lead to high heat dissipation requirements. The box needs to be equipped with an additional forced air cooling or liquid cooling system, which indirectly increases the energy consumption of the system operation, making it difficult to control the operating cost. In order to balance heat dissipation and structural strength, the internal space of the box is occupied by the heat dissipation components, resulting in a decrease in the energy storage capacity per unit volume. The capacity needs to be compensated by expanding the volume, forming a vicious cycle of weight and efficiency.

[0004] Therefore, a flat-plate energy storage box processing method is proposed to solve this problem. Summary of the invention

[0005] The purpose of the present invention is to provide a method for processing a flat-plate energy storage box, which solves the defects of the existing flat-plate energy storage box processing technology being complicated and heavy, thereby facilitating the cost control of the flat-plate energy storage box; it has the advantages of lightweight design and reducing the traditional flat-plate energy storage box processing steps.

[0006] To achieve the above object, the present invention provides the following technical solution: a method for processing a flat energy storage box, comprising the following steps: Step 1: Plate processing: First, weld the two plates together, and use the CNC machine tool to mill the welded plates to the specified length, and at the same time mill off the flow channel reinforcement ribs of the plates; Step 2: Front and rear plug processing: Then, according to the flow channel width of the plate, the front and rear plug shapes are milled out by CNC machine tools, and then the inlet and outlet channels are processed separately inside the front plug; Step 3: Processing of module beam and faucet base: mill the module beam and faucet base into suitable shapes according to processing requirements; Step 4: Plug welding: Then weld the processed front and rear plugs to the welded plates, first weld the front side and then weld the back side; Step 5: Module beam welding: Then select a surface with better flatness on the welded semi-finished product, and place the semi-finished product on the tooling for fixation, so that the surface with better flatness faces upward, and then symmetrically weld two milled module beams on it; Step 6: Welding of the faucet base: Finally, on the back of the welded semi-finished product, process the rivet hole shape and install the rivet nut. At the same time, weld the faucet base and the faucet on both sides of the front plug respectively. First weld the faucet base, and then weld the faucet to the top of the faucet base; Step 7: Flow channel air tightness test: After welding is completed, use the submerged water and instrument method for testing. Insert the female connector at one end and the closed connector at the other end, inject 0.8MPa compressed gas into the flow channel, place it in water and observe whether it bubbles. No bubbling means no leakage, bubbling means leakage, and the specific leakage value can be given by instrument detection.

[0007] Preferably, in step 1, the plate material adopts a liquid cooling plate profile, utilizing its high thermal conductivity, light weight and corrosion resistance to meet the load-bearing and heat dissipation requirements of the energy storage box.

[0008] Preferably, in step 1, the two plates are welded together by stir friction welding to ensure the airtightness of the joint and the stability of the overall structure after the two plates are welded. At the same time, the milled length of the plate is milled according to the required length of the processed energy storage box.

[0009] Preferably, in step 2, the plate and the flow channel are integrally formed by extrusion molding technology, which reduces welding points and improves air tightness, and the length of the front and rear plugs is consistent with the flow channel width of the two plates.

[0010] Preferably, in step 3, the module beam needs to be further processed internally to form rivet holes respectively adapted for installation of the pull-salt nuts, and the adaptable faucet base needs to be further processed on the top to form notches adapted for installation of the faucet.

[0011] Preferably, in step 4, the plug is welded to the plate by means of friction stir welding, and the heat input is dispersed by means of a skipping method to reduce the risk of welding deformation and cracks.

[0012] Preferably, in step 6, the faucet base and the faucet are welded to the semi-finished product by tungsten inert gas welding, and the weld is polished to the specified requirements after the welding is completed.

[0013] Preferably, in step 6, a rolled frame is installed on the edge of the semi-finished product, a U-shaped section is formed by combining a U-shaped plate and a flat plate, a receiving groove is formed with the flow channel plate, and a stamped crossbeam is embedded to improve the load-bearing capacity.

[0014] Preferably, in step 7, if bubbles appear in the flow channel during the submerged water test, it indicates a leak. The leak point is marked with a marker and repaired by tungsten inert gas welding. The repaired product is then subjected to the submerged water test step.

[0015] Preferably, in step 7, after passing the test, the front panel is machined and opened, and a Cr-Ni stainless steel screw sleeve is embedded, thereby improving the wear resistance and torsional resistance of the electrical interface installation.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention welds two liquid cooling plate profiles together, and then uses a CNC machine to mill the parts one by one to the specified shape requirements. The milled parts are then welded to the liquid cooling plate profile in turn, and the pull nuts are installed, so as to meet the requirements of lightweight energy storage box, load bearing and heat dissipation, solve the defects of the existing flat-plate energy storage box, which is complex to process and heavy, and is convenient for controlling the cost of the flat-plate energy storage box; it has the advantages of lightweight design and reducing the processing procedures of traditional flat-plate energy storage boxes. DETAILED DESCRIPTION

[0017] The present invention will be described in more detail below by way of examples, which are merely illustrative and do not in any way limit the scope of the present invention.

[0018] The present invention provides a technical solution: a method for processing a flat energy storage box, comprising the following steps: Step 1: Plate processing: First, weld the two plates together, and use the CNC machine tool to mill the welded plates to the specified length, and at the same time mill off the flow channel reinforcement ribs of the plates; Step 2: Front and rear plug processing: Then, according to the flow channel width of the plate, the front and rear plug shapes are milled out by CNC machine tools, and then the inlet and outlet channels are processed separately inside the front plug; Step 3: Processing of module beam and faucet base: mill the module beam and faucet base into suitable shapes according to processing requirements; Step 4: Plug welding: Then weld the processed front and rear plugs to the welded plates, first weld the front side and then weld the back side; Step 5: Module beam welding: Then select a surface with better flatness on the welded semi-finished product, and place the semi-finished product on the tooling for fixation, so that the surface with better flatness faces upward, and then symmetrically weld two milled module beams on it; Step 6: Welding of the faucet base: Finally, on the back of the welded semi-finished product, process the rivet hole shape and install the rivet nut. At the same time, weld the faucet base and the faucet on both sides of the front plug respectively. First weld the faucet base, and then weld the faucet to the top of the faucet base; Step 7: Flow channel air tightness test: After welding is completed, use the submerged water and instrument method for testing. Insert the female connector at one end and the closed connector at the other end, inject 0.8MPa compressed gas into the flow channel, place it in water and observe whether it bubbles. No bubbling means no leakage, bubbling means leakage, and the specific leakage value can be given by instrument detection.

[0019] Embodiment 1: First, two plates are welded together, and the welded plates are milled to the specified length by CNC machine tools, and the channel reinforcement ribs of the plates are milled off at the same time; then, according to the channel width of the plate, the front and rear plugs are milled out by CNC machine tools, and the water inlet and outlet are processed separately inside the front plug; then, the module beam and the faucet base are milled out into suitable shapes according to the processing requirements; then, the processed front and rear plugs are welded to the welded plates, first welding the front side and then the back side; then, a surface with better flatness is selected on the welded semi-finished product, and the semi-finished product is placed on the tooling for fixing, so that The side with better flatness faces upwards, so that two milled module beams can be symmetrically welded on it; finally, the rivet hole shape is processed on the back of the welded semi-finished product, and the rivet nuts are installed. At the same time, the faucet base and the faucet are welded on both sides of the front plug respectively. The faucet base is welded first, and then the faucet is welded to the top of the faucet base; at the same time, after the welding is completed, it is tested by submerging in water and adding instruments. A female joint is inserted into one end and a closed joint is used at the other end. 0.8MPa compressed gas is injected into the flow channel and placed in water to observe whether there are bubbles. No bubbling means no leakage, and bubbling means leakage. At the same time, the specific leakage value can be given by instrument detection.

[0020] Embodiment 2: In the first embodiment, the following steps are added: In step 1, the plate adopts liquid cooling plate profile, taking advantage of its high thermal conductivity, lightweight and corrosion resistance to meet the load-bearing and heat dissipation requirements of the energy storage box; the two plates are welded together by stir friction welding to ensure the airtightness of the joint and the stability of the overall structure after the two plates are welded. At the same time, the milling length of the plate is milled according to the required length of the energy storage box to be processed.

[0021] First, the two plates are welded together, and the length of the welded plates is milled by a CNC machine tool to make the plates milled to the specified length, and the flow channel reinforcement ribs of the plates are milled off at the same time; the plates are made of liquid cooling plate profiles, and their high thermal conductivity, light weight and corrosion resistance meet the load-bearing and heat dissipation requirements of the energy storage box; the two plates are welded together by stir friction welding to ensure the airtightness of the joints and the stability of the overall structure after the two plates are welded, and the milled length of the plates is milled according to the required length of the processed energy storage box. Then, according to the flow channel width of the plate, the front and rear plugs are milled out by CNC machine tools, and then the water inlet and outlet are processed separately inside the front plug; then the module beam and the faucet base are milled out into suitable shapes according to the processing requirements; then the processed front and rear plugs are welded to the welded plates, first welding the front side and then the back side; then, a surface with better flatness is selected on the welded semi-finished product, and the semi-finished product is placed on the tooling for fixing, so that the surface with better flatness faces upward, and then two milled module beams are symmetrically welded on it; finally Then, on the back of the welded semi-finished product, the rivet hole shape is processed, and the rivet nut is installed. At the same time, the faucet base and the faucet are welded on both sides of the front plug respectively. The faucet base is welded first, and then the faucet is welded to the top of the faucet base. At the same time, after the welding is completed, the submerged instrument method is used for detection. A female joint is inserted at one end and a closed joint is used at the other end. 0.8MPa compressed gas is injected into the flow channel. It is placed in water to observe whether there are bubbles. No bubbling means no leakage, and bubbling means leakage. At the same time, the specific leakage value can be given by instrument detection.

[0022] Embodiment three: In the second embodiment, the following steps are added: In step 2, the plate and the runner are integrated into one piece using extrusion molding technology to reduce welding points and improve air tightness. The length of the front and rear plugs is consistent with the runner width of the two plates.

[0023] In step 3, the module beam needs to be processed internally to form rivet holes for the installation of pull nuts, and the faucet base needs to be processed on the top to form notches for the installation of the faucet.

[0024] In step 4, the plug is welded to the plate by means of friction stir welding, and the heat input is dispersed by the skipping method to reduce the risk of welding deformation and cracks.

[0025] First, the two plates are welded together, and the length of the welded plates is milled by CNC machine tools to make the plates milled to the specified length, and the flow channel reinforcement ribs of the plates are milled off at the same time; the plates are made of liquid cooling plate profiles, and their high thermal conductivity, light weight and corrosion resistance meet the load-bearing and heat dissipation requirements of the energy storage box; the two plates are welded together by stir friction welding to ensure the airtightness of the joints and the stability of the overall structure after the two plates are welded, and the length of the plate milling is milled according to the required length of the processed energy storage box. Then, according to the flow channel width of the plate, the front and rear plugs are milled out by CNC machine tools, and then the water inlet and outlet are processed separately inside the front plug; the plate and the flow channel are integrated by extrusion molding technology to reduce welding points and improve airtightness. The length of the front and rear plugs is consistent with the flow channel width of the two plates. After that, the module beam and the faucet base are milled into suitable shapes according to the processing requirements; the module beam needs to be processed with rivet holes for the installation of the pull nut, and the faucet base needs to be processed with notches for the installation of the faucet on the top. Then, the processed front and rear plugs are welded to the welded plates, first welding the front and then the back; the plugs are welded to the plates by stir friction welding, and the jump bin method is used to disperse the heat input to reduce the risk of welding deformation and cracks. Then, select a surface with better flatness on the welded semi-finished product, and place the semi-finished product on the tooling for fixation, so that the surface with better flatness faces upward, and then symmetrically weld two milled module beams on it; finally, process the rivet hole shape on the back of the welded semi-finished product, and install the rivet nut, and weld the faucet base and the faucet on both sides of the front plug respectively. First weld the faucet base, and then weld the faucet to the top of the faucet base; at the same time, after the welding is completed, use the submerged instrument method for detection, insert the female joint at one end and the closed joint at the other end, inject 0.8MPa compressed gas into the flow channel, place it in water to observe whether it bubbles, no bubbling means no leakage, bubbling means leakage, and the specific leakage value can be given by instrument detection.

[0026] Embodiment 4: In the third embodiment, the following steps are added: In step 6, the faucet base and the faucet are welded to the semi-finished product by tungsten inert gas arc welding. After welding, the weld is polished to the specified requirements, and a rolled frame is installed on the edge of the semi-finished product. A U-shaped plate and a flat plate are combined to form a U-shaped cross-section, which is surrounded by a receiving groove with the flow channel plate, and a stamped beam is embedded to improve the load-bearing capacity.

[0027] In step 7, if bubbles appear during the submerged water test, it indicates a leak. The leak point is marked with a marker and repaired by tungsten inert gas welding. The repaired product is then subjected to the submerged water test step. After the test is passed, a hole is machined in the front panel and a Cr-Ni stainless steel screw sleeve is embedded to improve the wear resistance and torque resistance of the electrical interface installation.

[0028] First, the two plates are welded together, and the length of the welded plates is milled by CNC machine tools to make the plates milled to the specified length, and the flow channel reinforcement ribs of the plates are milled off at the same time; the plates are made of liquid cooling plate profiles, and their high thermal conductivity, light weight and corrosion resistance meet the load-bearing and heat dissipation requirements of the energy storage box; the two plates are welded together by stir friction welding to ensure the airtightness of the joints and the stability of the overall structure after the two plates are welded, and the length of the plate milling is milled according to the required length of the processed energy storage box. Then, according to the flow channel width of the plate, the front and rear plugs are milled out by CNC machine tools, and then the water inlet and outlet are processed separately inside the front plug; the plate and the flow channel are integrated by extrusion molding technology to reduce welding points and improve airtightness. The length of the front and rear plugs is consistent with the flow channel width of the two plates. After that, the module beam and the faucet base are milled into suitable shapes according to the processing requirements; the module beam needs to be processed with rivet holes for the installation of the pull nut, and the faucet base needs to be processed with notches for the installation of the faucet on the top. Then, the processed front and rear plugs are welded to the welded plates, first welding the front and then the back; the plugs are welded to the plates by stir friction welding, and the jump bin method is used to disperse the heat input to reduce the risk of welding deformation and cracks. Then, select a surface with better flatness on the welded semi-finished product, and place the semi-finished product on the tooling for fixation, so that the surface with better flatness faces upward, and then symmetrically weld two milled module beams on it; finally, process the rivet hole shape on the back of the welded semi-finished product, and install the rivet nut, and at the same time weld the faucet base and the faucet on both sides of the front plug respectively, first weld the faucet base, and then weld the faucet to the top of the faucet base; the faucet base and the faucet are welded to the semi-finished product by tungsten inert gas arc welding, and after welding, the weld is polished to the specified requirements, and a rolled frame is installed on the edge of the semi-finished product, and a U-shaped section is formed by combining the U-shaped plate and the flat plate, which is surrounded by a receiving groove with the flow channel plate, and is embedded in a stamped crossbeam to improve the load-bearing capacity. At the same time, after the welding is completed, the submerged water and instrument method is used for detection. One end is inserted into the female connector and the other end is closed with a joint. 0.8MPa compressed gas is injected into the flow channel and placed in water to observe whether there are bubbles. No bubbles means no leakage, and bubbles indicate leakage. At the same time, the specific leakage value is given by instrument detection. If bubbles occur during the submerged water detection of the flow channel, it means leakage. The leakage point is marked with a marker and repaired by tungsten inert gas welding. At the same time, the repaired product is subjected to the submerged water detection step. After the detection is passed, the front panel is machined and opened, and a Cr-Ni stainless steel screw sleeve is embedded, so as to improve the wear resistance and torque resistance of the electrical interface installation.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for processing a flat energy storage box, characterized in that: The following steps are involved: Step 1: Plate processing: First, weld the two plates together, and use the CNC machine tool to mill the welded plates to the specified length, and at the same time mill off the flow channel reinforcement ribs of the plates; Step 2: Front and rear plug processing: Then, according to the flow channel width of the plate, the front and rear plug shapes are milled out by CNC machine tools, and then the inlet and outlet channels are processed separately inside the front plug; Step 3: Processing of module beam and faucet base: mill the module beam and faucet base into suitable shapes according to processing requirements; Step 4: Plug welding: Then weld the processed front and rear plugs to the welded plates, first weld the front side and then weld the back side; Step 5: Module beam welding: Then select a surface with better flatness on the welded semi-finished product, and place the semi-finished product on the tooling for fixation, so that the surface with better flatness faces upward, and then symmetrically weld two milled module beams on it; Step 6: Welding of the faucet base: Finally, on the back of the welded semi-finished product, process the rivet hole shape and install the rivet nut. At the same time, weld the faucet base and the faucet on both sides of the front plug respectively. First weld the faucet base, and then weld the faucet to the top of the faucet base; Step 7: Flow channel air tightness test: After welding is completed, use the submerged water and instrument method for testing. Insert the female connector at one end and the closed connector at the other end, inject 0.8MPa compressed gas into the flow channel, place it in water and observe whether it bubbles. No bubbling means no leakage, bubbling means leakage, and the specific leakage value can be given by instrument detection.

2. A method for processing a flat energy storage box according to claim 1, characterized in that: In step 1, the plate material adopts a liquid cooling plate profile, utilizing its high thermal conductivity, light weight and corrosion resistance to meet the load-bearing and heat dissipation requirements of the energy storage box.

3. A method for processing a flat energy storage box according to claim 1, characterized in that: In step 1, the two plates are welded together by stir friction welding to ensure the airtightness of the joint and the stability of the overall structure after the two plates are welded. At the same time, the milling length of the plate is milled according to the required length of the energy storage box to be processed.

4. A method for processing a flat energy storage box according to claim 1, characterized in that: In step 2, the plate and the flow channel are integrally formed using extrusion molding technology to reduce welding points and improve air tightness. The length of the front and rear plugs is consistent with the flow channel width of the two plates.

5. A method for processing a flat energy storage box according to claim 1, characterized in that: In step 3, the module beam needs to be processed internally to form rivet holes respectively adapted for the installation of the pull-screw nuts, and the adaptable faucet base needs to be processed on the top to form a notch adapted for the installation of the faucet.

6. A method for processing a flat energy storage box according to claim 1, characterized in that: In step 4, the plug is welded to the plate by means of friction stir welding, and the heat input is dispersed by means of a skipping method to reduce the risk of welding deformation and cracks.

7. A method for processing a flat energy storage box according to claim 1, characterized in that: In step 6, the faucet base and the faucet are welded to the semi-finished product by tungsten inert gas arc welding, and the weld is polished to the specified requirements after the welding is completed.

8. A method for processing a flat energy storage box according to claim 1, characterized in that: In step 6, a rolled frame is installed on the edge of the semi-finished product, a U-shaped plate is combined with a flat plate to form a U-shaped cross section, a receiving groove is formed with the flow channel plate, and a stamped crossbeam is embedded to improve the load-bearing capacity.

9. A method for processing a flat energy storage box according to claim 1, characterized in that: In step 7, if bubbles appear during the submerged water test, it indicates a leak. The leak point is marked with a marker and repaired by tungsten inert gas welding. The repaired product is then subjected to the submerged water test step.

10. A method for processing a flat energy storage box according to claim 1, characterized in that: In step 7, after the test is passed, the front panel is machined and opened, and a Cr-Ni stainless steel screw sleeve is embedded, so as to improve the wear resistance and torque resistance of the electrical interface installation.