A new roller-pressed material with high corrosion resistance for battery pack protection

Abstract

The present invention relates to the technical field of battery packaging protection, and specifically to a roll-pressed new material high-corrosion protection device for battery packs, comprising a box assembly, a mounting assembly 1, a mounting assembly 2 and a secondary protection assembly, wherein the box assembly comprises a bottom plate, an envelope frame 1, an envelope frame 2, an envelope frame 3 and an envelope frame 4. The present invention cooperates with a roll-pressed new material high-corrosion protection device for battery packs in the present invention through a box assembly, a mounting assembly 1, an mounting assembly 2 and a secondary protection assembly, wherein the bottom plate, the envelope frame 1, the envelope frame 2, the envelope frame 3, the envelope frame 4 and the heat-conducting panel are all made of steel and are formed by roll-pressing welding and then sprayed with NPFOAM‑600 after electrophoresis, and the envelope frame 1, the envelope frame 2, the envelope frame 3 and the envelope frame 4 are all in the shape of square tubes to enclose and form a composite protective coating, and the inner protective layer can still play a protective role when the outer protective layer is damaged, thereby improving the anti-corrosion performance of the packaging material, thereby improving the service life and safety of the packaging.

Description

Technical Field

[0001] The invention relates to the technical field of battery packaging protection, and in particular to a high-corrosion-resistant battery pack protection device made of a rolled new material. Background Art

[0002] Roll forming is a continuous forming process mainly used for forming metal materials. The roll forming process gradually forms metal sheets or strips between a series of rollers to obtain a specific cross-sectional shape. Battery pack guards are widely used in packaging, electronics and other industries through roll forming. The application range of roll-formed new materials is wide, covering many fields such as metal materials, ceramic materials, polymer materials, etc. By precisely controlling the processing parameters during the roll forming process, the mechanical properties, corrosion resistance, high temperature performance, etc. of the material can be greatly improved.

[0003] With the development of new energy vehicles, battery pack protection devices are used to protect battery packs from external impacts, collisions and temperature changes. Battery pack protection devices are designed to ensure the safety and stability of batteries under various environmental conditions and prevent safety hazards such as short circuits, leakage or overheating. Battery pack protection devices often integrate various sensors and monitoring systems to monitor the status of the battery in real time, including parameters such as voltage, temperature, and current. Monitoring data can help identify potential problems and take timely measures, such as adjusting through BMS (battery management system).

[0004] During use, the existing battery pack protection device may cause the protective paint on the surface of the protection device to be scratched and rusted, directly exposing the installed battery pack. After long-term use, it is easy to affect the service life of the battery pack protection device, and even cause the battery pack to be damaged or catch fire, thereby affecting the safety of the packaging. Summary of the invention

[0005] Based on this, it is necessary to provide a high-corrosion-resistant battery pack protection device made of a rolled new material to address the existing technical problems.

[0006] In order to solve the problems of the prior art, the technical solution adopted by the present invention is: Compared with the prior art, the present invention has the following beneficial effects: a roll-formed new material high corrosion resistance battery pack protection device, comprising a box assembly, an installation assembly 1, an installation assembly 2 and a secondary protection assembly, the box assembly comprising a bottom plate, an envelope frame 1, an envelope frame 2, an envelope frame 3 and an envelope frame 4, the envelope frame 1, the envelope frame 2, the envelope frame 3 and the envelope frame 4 are fixedly arranged on the four side walls of the bottom plate in sequence, the envelope frame 1, the envelope frame 2, the envelope frame 3 and the envelope frame 4 are connected end to end in sequence, a plurality of mounting ears 1 are fixedly arranged on the side wall of the envelope frame 1, a plurality of welding nuts 1 are fixedly arranged in the middle of the mounting ears 1, two mounting ears 2 are fixedly arranged on the side wall of the envelope frame 3, the mounting ears 2 A welding nut 2 is fixed in the middle, a plurality of wire harness mounting frames 1 are fixed on the side wall of the envelope frame 1, a plurality of wire harness mounting frames 2 are fixed on the side wall of the envelope frame 3, the installation component 1 includes a mounting surface 1 fixed on the side wall of the envelope frame 4, a plurality of hanging point mounting holes 1 are opened on the surface of the installation surface 1, the installation component 2 includes a mounting surface 2 fixed on the side wall of the envelope frame 2, a plurality of hanging point mounting holes 2 are opened on the surface of the installation surface 2, the secondary protection component includes a heat-conducting panel fixed on the bottom end of the base plate, and the outer surfaces of the base plate, envelope frame 1, envelope frame 2, envelope frame 3, envelope frame 4 and the heat-conducting panel are sprayed with NPFOAM-600.

[0007] Envelope frame 1, envelope frame 2, envelope frame 3 and envelope frame 4 are all in the shape of square tubes, thereby enclosing and forming a composite protective coating. Even if the outer protective layer is damaged, the inner protective layer can still play a protective role, thereby preventing the protective paint on the surface of the protective device from being scratched and rusted, thereby preventing the installed battery pack from being directly exposed, thereby improving the anti-corrosion performance of the packaging material, thereby improving the service life and safety of the packaging.

[0008] Furthermore, two horizontal beams are symmetrically fixed on the surface of the bottom plate, two vertical beams 1 are symmetrically fixed on the inner walls of the two horizontal beams, a plurality of inner supports are fixed on the inner walls of the vertical beams 1, positioning frames are fixed on the side walls of the horizontal beams close to the vertical beams 1, vertical beams 2 are fixed at both ends of the horizontal beams, and the vertical beams 2 are fixed on the side walls of the envelope frame 2 and the envelope frame 4 in sequence.

[0009] Furthermore, the cross beam, vertical beam one and vertical beam two are all made of steel and are hollow inside, the two positioning frames are U-shaped and symmetrically distributed, the surfaces of the cross beam and vertical beam one are provided with mounting holes, and the outer surfaces of the cross beam, vertical beam one, vertical beam two and positioning frames are sprayed with NPFOAM-600.

[0010] Furthermore, a mounting seat 1 is fixedly provided on the side wall of the envelope frame 1, a mounting seat 4 is fixedly provided on the side wall of the envelope frame 1 close to the mounting seat 1, a mounting seat 5 is fixedly provided on the side wall of the envelope frame 1 close to the mounting seat 4, and a rotation hole 2 is opened on the surfaces of the mounting seat 1, the mounting seat 4 and the positioning frame.

[0011] Furthermore, a mounting seat 2 is fixedly provided on the side wall of the envelope frame 1, and two hole grooves 1 are symmetrically provided on the surface of the mounting seat 2. The bottom end of the mounting seat 2 is flush with the bottom end of the envelope frame 1, a potential groove 1 is provided on the side wall of the envelope frame 1 close to the mounting seat 2, and a potential groove 2 is provided on the side wall of the envelope frame 1 close to the mounting ear 1.

[0012] Furthermore, a mounting seat three is fixed in the middle of the envelope frame three to form an integrated structure, and the mounting seat three is U-shaped and sequentially connected with the envelope frame three. A wiring harness mounting hole three is opened on the side wall of the bottom plate close to the envelope frame three, and the wiring harness mounting hole three passes through the bottom plate.

[0013] Furthermore, a main positioning hole 1 is opened on the surface of the mounting surface 1, and a secondary reference hole 1 is opened on the surface of the mounting surface 1 away from the main positioning hole 1. The center of the main positioning hole 1 is (3192, -468.5, 363.6), and the center coordinates of the secondary reference hole 1 are (2666, -468.5, 363.3).

[0014] Furthermore, a main positioning hole 2 is opened on the surface of the second mounting surface, and a secondary reference hole 2 is opened on the surface of the second mounting surface away from the main positioning hole 2. The inner diameters of the second hanging point mounting hole and the first hanging point mounting hole are both 30 mm, and a grounding point is fixedly provided at the bottom of the second mounting surface near the second hanging point mounting hole.

[0015] Furthermore, a thermally conductive strip is fixedly provided on the surface of the thermally conductive panel, and a supporting surface is fixedly provided on the side wall of the thermally conductive panel close to the mounting seat 2. The external dimensions of the thermally conductive panel and the supporting surface are respectively adapted to the external dimensions of the envelope frame 1, the envelope frame 2, the envelope frame 3, the envelope frame 4 and the mounting seat 2.

[0016] A roller-pressed new material high corrosion-resistant battery pack protective device comprises the following steps: S1: Assemble, weld and fix the envelope frame 1, envelope frame 2, envelope frame 3 and envelope frame 4 on the four side walls of the base plate in sequence, then weld the mounting surface 1 and mounting surface 2 on the side walls of envelope frame 2 and envelope frame 3 in sequence, then assemble and position the horizontal beam and vertical beam 1 and weld them on the surface of the base plate, finally weld the mounting seat 1, mounting seat 4, mounting seat 5 and other components in sequence, and finally weld the thermal conductive panel to the bottom end of the thermal conductive panel.

[0017] S2: Anti-corrosion treatment: firstly, the welded parts are electrophoretically processed, and then NPFOAM-600 is sprayed with an appropriate amount of flame retardant and physical foaming agent to form a thermal insulation coating through combined reaction and foaming.

[0018] First, a roll-pressed new material high-corrosion-resistant battery pack protective device in the present invention is matched with a box component, an installation component 1, an installation component 2 and a secondary protection component. The bottom plate, the envelope frame 1, the envelope frame 2, the envelope frame 3, the envelope frame 4 and the heat-conducting panel are all made of steel and are formed by roll-pressing welding and then sprayed with NPFOAM-600 after electrophoresis. The envelope frame 1, the envelope frame 2, the envelope frame 3 and the envelope frame 4 are all in a square tube shape to enclose and form a composite protective coating. The outer protective layer can still play a protective role when the inner protective layer is damaged, thereby avoiding the protective paint on the surface of the protective device from being scratched and rusted and directly exposing the installed battery pack, thereby improving the anti-corrosion performance of the packaging material, thereby improving the service life and safety of the packaging; Secondly, a roll-formed new material high corrosion-resistant battery pack protection device in the present invention is provided with a horizontal beam, a vertical beam 1, an inner support, a vertical beam 2 and a positioning frame, which are all formed by steel roll forming, and holes are provided on the surfaces of the horizontal beam and the vertical beam 1 in the middle of the interior for the installation of the heat dissipation component, thereby improving the heat dissipation efficiency inside the box body and further improving the safety of use; Thirdly, the roller-pressed new material high corrosion-resistant battery pack protection device of the present invention is provided with a connection assembly, a crossbeam, a mounting seat three, a potential slot one, a mounting seat two, a potential slot two, a hole slot one, a wire harness mounting frame one and a wire harness mounting frame two, thereby improving the convenience and safety of installing various sensors; BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the front view installation structure of the envelope frame of the present invention; Figure 3 It is a side view stereoscopic structural schematic diagram of the present invention; Figure 4 It is a schematic diagram of the top plan structure of the present invention; Figure 5 It is a schematic diagram of the vertical beam-bottom installation structure of the present invention; Figure 6 It is a schematic diagram of the front view installation structure of the heat conduction panel of the present invention; Figure 7 It is a schematic diagram of the planar structure of the envelope frame of the present invention from a side view; Figure 8 It is a schematic diagram of the planar structure of the envelope frame of the present invention from three side views.

[0020] The numbers in the figure are: 1, box assembly; 101, bottom plate; 102, envelope frame 1; 103, cross beam; 104, mounting seat 1; 105, mounting ear 1; 106, welding nut 1; 107, envelope frame 2; 108, envelope frame 3; 109, vertical beam 1; 110, inner support; 111, mounting seat 3; 112, mounting ear 2; 113, welding nut 2; 114, envelope frame 4; 115, potential slot 1; 116, mounting seat 4; 117, rotation hole 2; 118, mounting seat 2; 119, hole slot 1; 120, potential slot 2; 121, Wire harness mounting frame one; 122, wire harness mounting frame two; 123, wire harness mounting hole three; 124, vertical beam two; 125, positioning frame; 126, mounting seat five; 2, mounting component one; 201, mounting surface one; 202, hanging point mounting hole one; 203, main positioning hole one; 204, secondary reference hole one; 3, mounting component two; 301, mounting surface two; 302, hanging point mounting hole two; 303, main positioning hole two; 304, secondary reference hole two; 305, grounding point; 4, secondary protection component; 401, thermal conductive panel; 402, thermal conductive strip; 403, supporting surface. DETAILED DESCRIPTION

[0021] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] refer to Figures 1 to 8 A roll-formed new material high corrosion protection battery pack protection device shown includes a box assembly 1, an installation assembly 2, an installation assembly 3 and a secondary protection assembly 4. The box assembly 1 includes a bottom plate 101, an envelope frame 102, an envelope frame 2 107, an envelope frame 3 108 and an envelope frame 4 114. The bottom plate 101, the envelope frame 1 102, the envelope frame 2 107, the envelope frame 3 108 and the envelope frame 4 114 are all made of steel plates and are formed by roll forming in sequence. The material grades are HC420 / 780DP and B340 / 590DP. The corrosion resistance test results are:

[0023] The envelope frame 1 102, the envelope frame 2 107, the envelope frame 3 108 and the envelope frame 4 114 are fixed on the four side walls of the bottom plate 101 by welding in sequence. The envelope frame 1 102, the envelope frame 2 107, the envelope frame 3 108 and the envelope frame 4 114 are connected end to end by welding in sequence to form a frame structure. A plurality of mounting ears 105 are fixed on the side wall of the envelope frame 102 by welding, and a plurality of welding nuts 106 are fixed in the middle of the mounting ears 105. Two mounting ears 2 112 are fixed on the side wall of the envelope frame 3 108, and a welding nut 2 113 is fixed in the middle of the mounting ears 2 112. The welding nut 2 113 and the mounting ears 1 105 are both M6 models for M6 bolt connection, so as to facilitate the installation of the box body on the frame The frame is the main body of the new energy vehicle. This is the prior art and will not be repeated here. A plurality of harness mounting frames 121 are fixedly arranged on the side wall of the envelope frame 102, and a plurality of harness mounting frames 2 122 are fixedly arranged on the side wall of the envelope frame 3 108. The harness mounting frames 121 and 122 are respectively provided for external line connection. The surfaces of the envelope frame 102, the envelope frame 2 107, the envelope frame 3 108 and the envelope frame 4 114 are provided with holes and grooves, and the total number of holes and grooves is 53 for the installation of the upper cover plate. The upper cover plate has the same external dimensions and the same material as the envelope frame 102, the envelope frame 2 107, the envelope frame 3 108 and the envelope frame 4 114. The installation components 12 all include a mounting surface 20 fixedly arranged on the side wall of the envelope frame 4 114 by welding. 1. The surface of the mounting surface 1 201 is provided with a plurality of hanging point mounting holes 1 202. The mounting assembly 2 3 includes a mounting surface 2 301 fixedly mounted on the side wall of the envelope frame 2 107 by welding. The surface of the mounting surface 2 301 is provided with a plurality of hanging point mounting holes 2 302. The inner diameters of the hanging point mounting holes 2 302 and the hanging point mounting holes 1 202 are both 30 mm. The hanging point mounting holes 2 302 and the hanging point mounting holes 1 202 are symmetrically distributed as the hanging point mounting holes of the whole vehicle. The welding seams of the mounting surface 1 201 and the mounting surface 2 301 need to be polished after welding. The height of the welding seams cannot exceed that of the mounting surface 1 201 and the mounting surface 2 301. The secondary protection assembly 4 includes a heat conducting panel 401 fixedly mounted at the bottom of the bottom plate 101 to strengthen the bottom of the bottom plate 101. The thickness of the envelope frame 1 102, the envelope frame 2 107, the envelope frame 3 108 and the envelope frame 4 114 is increased at the same time. The outer surfaces of the bottom plate 101, the envelope frame 1 102, the envelope frame 2 107, the envelope frame 3 108, the envelope frame 4 114 and the heat conduction panel 401 are sprayed with NPFOAM-600. The envelope frame 1 102, the envelope frame 2 107, the envelope frame 3 108 and the envelope frame 4 114 are all in square tube configuration and are internally supported, thereby forming a composite protective coating. When the outer protective coating of the envelope frame 1 102, the envelope frame 2 107, the envelope frame 3 108 and the envelope frame 4 114 is damaged, the inner protective layer of the envelope frame 1 102, the envelope frame 2 107, the envelope frame 3 108 and the envelope frame 4 114 still plays a protective role.In order to avoid the box being scratched once and directly affecting the installation and protection safety of the battery pack, NPFOAM-600 is a nanomaterial composed of polyol and isocyanate (MDI), supplemented with an appropriate amount of flame retardant and physical foaming agent, which reacts and foams to form a thermal insulation coating. It has excellent thermal insulation, good flame retardancy, corrosion resistance and aging resistance. The spraying method adopts airless spraying, which is pressurized by Graco spraying equipment and sprayed with AP spray gun. The spraying trajectory is automatically controlled by a robot. First, the nanomaterial is pressurized to a specific pressure by the Graco spraying equipment, and then the nanomaterial is sprayed onto the material surface by the AP spray gun. The spraying trajectory is controlled by the robot. The automatic spraying of the traces and movement speed will not cause large deviations due to different workers' skills, which improves the spraying accuracy, so that the surface of the bottom plate 101, the envelope frame 1 102, the envelope frame 2 107, the envelope frame 3 108, the envelope frame 4 114 and the heat-conducting panel 401 are evenly covered with NPFOAM-600 coating, thereby further improving the overall stability of the external structure, and the battery pack is loaded through the enclosure of the envelope frame 1 102, the envelope frame 2 107, the envelope frame 3 108 and the envelope frame 4 114, so as to avoid the bumps of the vehicle during driving, which will cause scratches and rust on the heat-conducting panel 401, thereby increasing the service life of the protective device and improving the safety performance of use.

[0024] Furthermore, two horizontal beams 103 are symmetrically fixed on the surface of the bottom plate 101 by welding, two vertical beams 109 are symmetrically fixed on the inner side walls of the two horizontal beams 103 by welding, a plurality of inner supports 110 are fixed on the inner side walls of the vertical beams 109 by welding, positioning frames 125 are fixed on the side walls of the horizontal beams 103 close to the vertical beams 109 by welding, vertical beams 124 are fixed on both ends of the horizontal beams 103, and the vertical beams 124 are fixed on the side walls of the envelope frames 107 and 114 by welding in turn, thereby dividing the surface of the bottom plate 101 into three areas. Two areas of the same area are used to load battery packs. The weld guide in the two battery compartment areas does not exceed 4mm, and welding slag and sharp corners are not allowed. The other area is used to install various sensors to monitor the changes in temperature and humidity inside the box, and monitor the changes in voltage and current of the battery pack. The battery pack and the sensor are both existing technologies and will not be repeated here. The horizontal beam 103 and the vertical beam 109 are both made of steel and are hollow inside to reduce the heat transfer efficiency. The surfaces of the horizontal beam 103 and the vertical beam 109 are provided with mounting holes for the installation of the liquid cooling plate. The liquid cooling plate is existing technology and will not be repeated here, thereby facilitating heat dissipation inside the box.

[0025] Furthermore, the horizontal beam 103, the vertical beam 109 and the vertical beam 124 are all made of steel and are hollow inside, the two positioning frames 125 are U-shaped and symmetrically distributed, the surfaces of the horizontal beam 103 and the vertical beam 109 are provided with mounting holes for heat dissipation, and the outer surfaces of the horizontal beam 103, the vertical beam 109, the vertical beam 124 and the positioning frames 125 are sprayed with NPFOAM-600, and the spraying method is the same as above.

[0026] Furthermore, a mounting seat 104 is fixedly provided on the side wall of the envelope frame 102, a mounting seat 4 116 is fixedly provided on the side wall of the envelope frame 102 close to the mounting seat 104, and a mounting seat 5 126 is fixedly provided on the side wall of the envelope frame 102 close to the mounting seat 4 116. The mounting seat 104, the mounting seat 4 116 and the mounting seat 5 126 are respectively used for installing and fixing the sensor. The surfaces of the mounting seat 104, the mounting seat 4 116 and the positioning frame 125 are provided with mounting holes 117. There are five mounting holes 117 in total for installing the BDU installation line to facilitate wiring.

[0027] Furthermore, a mounting seat 118 is fixed to the side wall of the envelope frame 102 by welding, and two hole grooves 119 are symmetrically provided on the surface of the mounting seat 118 for installation of the solenoid valve seat. The solenoid valve seat is used to control the flow of fluid. The solenoid valve is a prior art and will not be described in detail here. The bottom end of the mounting seat 118 is flush with the bottom end of the envelope frame 102, and a potential groove 115 is provided on the side wall of the envelope frame 102 near the mounting seat 118, and a potential groove 120 is provided on the side wall of the envelope frame 102 near the mounting ear 105.

[0028] Furthermore, a mounting seat three 111 is fixed in the middle of the envelope frame three 108 to form an integrated structure. The mounting seat three 111 is U-shaped and connected with the envelope frame three 108 in sequence to facilitate wiring. A wiring harness mounting hole three 123 is opened on the side wall of the bottom plate 101 close to the envelope frame three 108. The wiring harness mounting hole three 123 passes through the bottom plate 101 to facilitate wiring.

[0029] Furthermore, a main positioning hole 203 is opened on the surface of the mounting surface 201, and a secondary reference hole 204 is opened on the surface of the mounting surface 201 away from the main positioning hole 203. The center coordinates of the main positioning hole 203 are (3192, -468.5, 363.6), and the center coordinates of the secondary reference hole 204 are (2666, -468.5, 363.3), which improves the convenience of the installation and positioning of the box.

[0030] Furthermore, a main positioning hole 203 is provided on the surface of the second mounting surface 301, a secondary reference hole 204 is provided on the surface of the second mounting surface 301 away from the main positioning hole 203, the inner diameters of the second hanging point mounting hole 302 and the first hanging point mounting hole 202 are both 30 mm, and a grounding point 305 is fixedly provided at the bottom of the second mounting surface 301 near the second hanging point mounting hole 302. When the box is electrophoresed, the grounding point 305 needs to be covered with tape, and then conductive paint is sprayed on the surface of the grounding point 305 to facilitate connection.

[0031] Furthermore, a thermal conductive strip 402 is fixedly provided on the surface of the thermal conductive panel 401, and a supporting surface 403 is fixedly provided on the side wall of the thermal conductive panel 401 close to the second mounting seat 118. The external dimensions of the thermal conductive panel 401 and the supporting surface 403 are respectively matched with the external dimensions of the envelope frame 102, the envelope frame 2 107, the envelope frame 3 108, the envelope frame 4 114 and the mounting seat 2 118, thereby improving the stability of the bottom support of the base plate 101, while increasing the heat dissipation area and improving the bottom heat dissipation efficiency.

[0032] A roller-pressed new material high corrosion-resistant battery pack protective device comprises the following steps: S1: Assemble, weld and fix the envelope frame 1 102, envelope frame 2 107, envelope frame 3 108 and envelope frame 4 114 on the four side walls of the base plate 101 in sequence, then weld the mounting surface 1 201 and mounting surface 2 301 on the side walls of the envelope frame 2 107 and envelope frame 3 108 in sequence, then assemble and position the cross beam 103 and the vertical beam 1 109 and weld them on the surface of the base plate 101, finally weld the mounting seat 1 104, mounting seat 4 116, mounting seat 5 126 and other components in sequence, and finally weld the heat conductive panel 401 to the bottom end of the heat conductive panel 401.

[0033] S2: Anti-corrosion treatment: firstly, the welded parts are electrophoretically processed, and then NPFOAM-600 is sprayed with an appropriate amount of flame retardant and physical foaming agent to form a thermal insulation coating through combined reaction and foaming.

[0034] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A roll-pressed new material high corrosion protection battery pack protection device, comprising a box assembly (1), a first mounting assembly (2), a second mounting assembly (3) and a secondary protection assembly (4), characterized in that: The box assembly (1) comprises a bottom plate (101), an envelope frame 1 (102), an envelope frame 2 (107), an envelope frame 3 (108) and an envelope frame 4 (114); the envelope frame 1 (102), the envelope frame 2 (107), the envelope frame 3 (108) and the envelope frame 4 (114) are fixedly arranged on four side walls of the bottom plate (101) in sequence; the envelope frame 1 (102), the envelope frame 2 (107), the envelope frame 3 (108) and the envelope frame 4 (114) are connected end to end in sequence; the envelope frame 1 (102), the envelope frame 2 (107), the envelope frame 3 (108) and the envelope frame 4 (114) are connected end to end in sequence; 2) is fixedly provided with a plurality of mounting ears (105) on the side wall, a plurality of welding nuts (106) are fixedly provided in the middle of the mounting ears (105), two mounting ears (112) are fixedly provided on the side wall of the envelope frame (108), a welding nut (113) is fixedly provided in the middle of the mounting ears (112), a plurality of wiring harness mounting frames (121) are fixedly provided on the side wall of the envelope frame (102), and a plurality of wiring harness mounting frames (122) are fixedly provided on the side wall of the envelope frame (108); The mounting assembly one (2) includes a mounting surface one (201) fixedly mounted on the side wall of the envelope frame four (114), and the surface of the mounting surface one (201) is provided with a plurality of hanging point mounting holes one (202); the mounting assembly two (3) includes a mounting surface two (301) fixedly mounted on the side wall of the envelope frame two (107), and the surface of the mounting surface two (301) is provided with a plurality of hanging point mounting holes two (302); The secondary protection assembly (4) comprises a heat-conducting panel (401) fixedly mounted on the bottom end of the base plate (101), and the outer surfaces of the base plate (101), the first envelope frame (102), the second envelope frame (107), the third envelope frame (108), the fourth envelope frame (114) and the heat-conducting panel (401) are all spray-coated with NPFOAM-600.

2. The roll-pressed new material high corrosion resistance battery pack protection device according to claim 1 is characterized by: Two horizontal beams (103) are symmetrically fixed on the surface of the bottom plate (101); two vertical beams (109) are symmetrically fixed on the inner side walls of the two horizontal beams (103); a plurality of inner supports (110) are fixed on the inner side walls of the vertical beams (109); positioning frames (125) are fixed on the side walls of the horizontal beams (103) close to the vertical beams (109); vertical beams (124) are fixed at both ends of the horizontal beams (103); and the vertical beams (124) are fixed on the side walls of the second envelope frame (107) and the fourth envelope frame (114) in sequence.

3. The roll-pressed new material high corrosion resistance battery pack protection device according to claim 2 is characterized by: The cross beam (103), the first vertical beam (109) and the second vertical beam (124) are all made of steel and are hollow inside. The two positioning frames (125) are both U-shaped and symmetrically distributed. The surfaces of the cross beam (103) and the first vertical beam (109) are provided with mounting holes. The outer surfaces of the cross beam (103), the first vertical beam (109), the second vertical beam (124) and the positioning frames (125) are sprayed with NPFOAM-600.

4. The roll-pressed new material high corrosion resistance battery pack protection device according to claim 1 is characterized by: A mounting seat 1 (104) is fixedly provided on the side wall of the envelope frame 1 (102), a mounting seat 4 (116) is fixedly provided on the side wall of the envelope frame 1 (102) close to the mounting seat 1 (104), a mounting seat 5 (126) is fixedly provided on the side wall of the envelope frame 1 (102) close to the mounting seat 4 (116), and a rotation hole 2 (117) is provided on the surfaces of the mounting seat 1 (104), the mounting seat 4 (116) and the positioning frame (125).

5. The roller-pressed new material high corrosion resistance battery pack protection device according to claim 4 is characterized by: A mounting seat 2 (118) is fixedly provided on the side wall of the envelope frame 1 (102); two hole grooves 1 (119) are symmetrically provided on the surface of the mounting seat 2 (118); the bottom end of the mounting seat 2 (118) is flush with the bottom end of the envelope frame 1 (102); a potential groove 1 (115) is provided on the side wall of the envelope frame 1 (102) close to the mounting seat 2 (118); and a potential groove 2 (120) is provided on the side wall of the envelope frame 1 (102) close to the mounting ear 1 (105).

6. The roller-pressed new material high corrosion resistance battery pack protection device according to claim 1 is characterized by: A mounting seat three (111) is fixedly arranged in the middle of the envelope frame three (108) to form an integrated structure; the mounting seat three (111) is U-shaped and sequentially connected to the envelope frame three (108); a wiring harness mounting hole three (123) is opened on the side wall of the bottom plate (101) close to the envelope frame three (108); the wiring harness mounting hole three (123) passes through the bottom plate (101).

7. The roller-pressed new material high corrosion resistance battery pack protection device according to claim 1 is characterized by: A main positioning hole 1 (203) is provided on the surface of the mounting surface 1 (201), and a secondary reference hole 1 (204) is provided on the surface of the mounting surface 1 (201) away from the main positioning hole 1 (203). The center of the main positioning hole 1 (203) is (3192, -468.5, 363.6), and the center coordinates of the secondary reference hole 1 (204) are (2666, -468.5, 363.3).

8. The roll-pressed new material high corrosion resistance battery pack protection device according to claim 1 is characterized by: A main positioning hole 2 (303) is provided on the surface of the second mounting surface (301), and a secondary reference hole 2 (304) is provided on the surface of the second mounting surface (301) away from the main positioning hole 2 (303). The inner diameters of the second hanging point mounting hole (302) and the first hanging point mounting hole (202) are both 30 mm, and a grounding point (305) is fixedly provided at the bottom of the second mounting surface (301) near the second hanging point mounting hole (302).

9. The roller-pressed new material high corrosion resistance battery pack protection device according to claim 1 is characterized by: A heat-conducting strip (402) is fixedly provided on the surface of the heat-conducting panel (401), and a supporting surface (403) is fixedly provided on the side wall of the heat-conducting panel (401) close to the second mounting seat (118). The external dimensions of the heat-conducting panel (401) and the supporting surface (403) are respectively matched with the external dimensions of the first envelope frame (102), the second envelope frame (107), the third envelope frame (108), the fourth envelope frame (114) and the second mounting seat (118).

10. A roll-pressed new material high corrosion resistance battery pack protection device, using the roll-pressed new material high corrosion resistance battery pack protection device as described in any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Assembling, welding and fixing the envelope frame 1 (102), the envelope frame 2 (107), the envelope frame 3 (108) and the envelope frame 4 (114) on the four side walls of the bottom plate (101) in sequence, then welding the mounting surface 1 (201) and the mounting surface 2 (301) on the side walls of the envelope frame 2 (107) and the envelope frame 3 (108) in sequence, then assembling and positioning the cross beam (103) and the vertical beam 1 (109) and welding them on the surface of the bottom plate (101), finally welding the mounting seat 1 (104), the mounting seat 4 (116), the mounting seat 5 (126) and other components in sequence, and finally welding the heat conduction panel (401) to the bottom end of the heat conduction panel (401); S2: Anti-corrosion treatment: firstly, the welded parts are electrophoretically processed, and then NPFOAM-600 is sprayed with an appropriate amount of flame retardant and physical foaming agent to form a thermal insulation coating through combined reaction and foaming.

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