Aluminum alloy battery protection plate spraying device and spraying process thereof

Abstract

The invention discloses an aluminum alloy battery protection plate spraying device and a spraying process thereof, and relates to the technical field of spraying equipment.The aluminum alloy battery protection plate spraying device comprises a flat spraying cavity and an air cavity, a plurality of partition plates are arranged in the flat spraying cavity, and a plurality of spraying areas are formed between the partition plates and the inner wall of the flat spraying cavity; air holes are formed in the positions, located above the spraying area, of the connecting positions of the flat spraying cavity and the air cavity, and electrode needles are arranged on the positions, located over the air holes, of the inner top face of the air cavity. According to the device, high-voltage ionized air subjected to corona discharge of the electrode needle in the air cavity rapidly flows into the flat spraying cavity and is fully mixed with spraying material particles flowing at a high speed, so that the spraying material particles are fully charged with negative charges and are sprayed to an aluminum alloy battery protection plate to be sprayed through the front end of the flat spraying cavity; due to the fact that the flat spraying cavity is arranged in a flat mode, the sprayed material particles can be more easily charged with negative charges, and the attaching tightness of the sprayed material particles and the aluminum alloy battery protection plate to be sprayed is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spraying equipment, in particular to an aluminum alloy battery guard plate spraying device and a spraying process thereof. BACKGROUND

[0002] The aluminum alloy battery guard plate is a metal protection plate installed below the chassis of an electric vehicle to protect the power battery pack from being bumped, scratched and impacted.

[0003] In the prior art, the surface of the aluminum alloy battery guard plate is mainly sprayed by an electrostatic spraying gun. The electrostatic spraying gun uses a high-voltage electrostatic field to charge the spraying material particles, so that the spraying material particles are adsorbed on the surface of the aluminum alloy battery guard plate, and then a uniform and tight coating is formed, thereby improving the strength of the aluminum alloy battery guard plate.

[0004] However, in the existing electrostatic spraying gun, the flowing spraying material particles are difficult to be fully charged with negative charges when passing through the high-voltage electrostatic field, because the high-voltage ionized air cannot penetrate the spraying material particles. As a result, the adhesion of the spraying material particles to the aluminum alloy battery guard plate is not tight enough, and the spraying quality and efficiency are to be improved. In addition, the existing electrostatic spraying gun cannot adaptively adjust the width of the nozzle when facing aluminum alloy battery guard plates of different widths, which reduces the spraying efficiency.

[0005] Therefore, an aluminum alloy battery guard plate spraying device and a spraying process thereof are proposed. SUMMARY

[0006] The present application aims to provide an aluminum alloy battery guard plate spraying device and a spraying process thereof to solve the problems of low spraying efficiency and quality caused by the difficulty of the existing electrostatic spraying gun in uniformly and fully charging the spraying material particles with negative charges and adaptively adjusting the width of the nozzle.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solution: an aluminum alloy battery guard plate spraying device, comprising a flat spraying cavity, a gas cavity is arranged on the top of the flat spraying cavity, the front and rear ends of the flat spraying cavity are throughly arranged, the rear end of the gas cavity is closed, a plurality of partitions are arranged inside the flat spraying cavity, a plurality of spraying zones are formed between the partitions and the inner wall of the flat spraying cavity, a gas hole is arranged above each spraying zone at the connection between the flat spraying cavity and the gas cavity, and an electrode needle is arranged on the inner top surface of the gas cavity above each gas hole. A right side plate and a left side plate are slidably connected to the rear end of the flat spraying cavity, a top connecting plate is arranged on the top of each of the right side plate and the left side plate, and a threaded rotating shaft is rotatably connected to the top connecting plate. A support rod is arranged at the rear end of the gas cavity, a high-voltage electrostatic generator is arranged on the top of the support rod, and the high-voltage electrostatic generator is connected to the electrode needles through wires. The rear end of the right side plate and the left side plate is provided with a U-shaped plate, the upper and lower sides of the right side plate, the left side plate and the U-shaped plate are fixedly connected with elastic film layers, and the rear end of the U-shaped plate is provided with a joint.

[0008] Preferably, the rear end of the flat spray cavity is provided with sliding rails on the upper and lower sides, the rear end of the flat spray cavity is provided with side blocks on the left and right sides, the positions of the top connecting plates on the right side plate or the left side plate are staggered, the front end of the right side plate and the left side plate is provided with butt sliding blocks on the upper and lower sides, and the butt sliding blocks are in sliding connection with the sliding rails.

[0009] Preferably, the threaded rotating shaft penetrates through the support rod and is in threaded connection with the support rod, and the threaded rotating shaft is provided with a rotating head at the other end away from the right side plate or the left side plate.

[0010] Preferably, the air hole is obliquely arranged, the top of the air hole is located behind the bottom of the air hole, and the electrode needle is located directly above the top of the air hole.

[0011] Preferably, the front end face of the right side plate and the left side plate is in sliding connection with the rear end face of the flat spray cavity, the sliding rail is in horizontal U-shaped, and the butt sliding block is in horizontal U-shaped.

[0012] Preferably, the front end face of the right side plate and the left side plate is in sliding connection with the rear end face of the flat spray cavity, the sliding rail is in horizontal U-shaped, and the butt sliding block is in horizontal U-shaped.

[0013] Preferably, the front end of the gas cavity body is located behind the front end of the flat spray cavity, and the rear end of the gas cavity body is flush with the rear end of the flat spray cavity.

[0014] Preferably, the front end of the flat spray cavity is provided with a spray head, the rear end of the support rod is provided with a handle, and the two side walls connected with the U-shaped plate and the right side plate or the left side plate are elastic.

[0015] A spraying process of an aluminum alloy battery guard plate spraying device, comprising the following steps: Step one: pump high-speed flowing spraying material particles into the movable cavity composed of the U-shaped plate, the elastic film layer, the right side plate and the left side plate through the joint; Step two: connect the high-voltage electrostatic generator to the power supply, and the worker holds the handle to make the front end spray head of the flat spray cavity aim at the aluminum alloy battery guard plate to be sprayed; Step three: according to the length of the aluminum alloy battery guard plate to be sprayed, adjust the distance between the right side plate and the left side plate, specifically, rotate the rotating head to make the right side plate or the left side plate close to or away from the support rod.

[0016] Preferably, in step three, the right side plate or the left side plate is always located on the partition plate or is in close contact with the side wall of the side block.

[0017] Compared with the prior art, the application has the following advantages: 1、The device uses the high-speed flowing spraying material particles to pass through the flat spraying cavity, so that the air pressure in the air hole is low, and the high-pressure ionized air in the air cavity that passes through the electrode needle corona discharge quickly flows into the flat spraying cavity and fully mixes with the high-speed flowing spraying material particles, so that the spraying material particles are fully charged with negative charges and sprayed to the aluminum alloy battery guard plate to be sprayed through the front end of the flat spraying cavity.

[0018] 2、The device uses the distance between the right side plate and the left side plate to be adjusted conveniently and the partition plate to divide the flat spraying cavity into several spraying areas, so that the device can adjust the spraying width according to the width of the aluminum alloy battery guard plate to be sprayed, thereby improving the spraying efficiency and spraying adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which: Figure 1 is a schematic view of the overall structure of the present application; Figure 2 is a schematic view of the connection between the U-shaped plate and the elastic film layer in the present application; Figure 3 is a working state diagram of the present application; Figure 4 is a front view of the flat spraying cavity and the air cavity in the present application; Figure 5 is a rear view of the flat spraying cavity and the air cavity in the present application; Figure 6 is a sectional view of the overall structure of the present application; Figure 7 is Figure 6 is an enlarged schematic view of position A in the present application; Figure 8It is the structure view of right side plate in the application; Figure 9 It is the structure view of left side plate in the application.

[0020] In the figure: 1, flat spray cavity; 11, spray head; 12, slide rail; 13, partition; 14, side stopper; 15, air hole; 2, air cavity; 21, electrode needle; 22, wire; 3, movable cavity; 31, right side plate; 32, butt joint sliding block; 33, top connecting plate; 34, threaded rotating shaft; 35, left side plate; 36, rotating head; 4, support rod; 41, handle; 5, high-voltage electrostatic generator; 6, U-shaped plate; 61, elastic film layer; 62, joint. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0022] In the description of the application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by up, down, front, back, left, right and the like is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the application and simplifying the description, and therefore cannot be understood as a limitation on the application, indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the application.

[0023] In the description of the application, several meanings are one or more, and multiple meanings are two or more. Greater than, less than, more than and the like are understood as not including the number itself. Above, below and the like are understood as including the number itself. If it is described that the first and the second are only used for the purpose of distinguishing technical features, they cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0024] Reference Figures 1-9 As shown in the figure, the application provides a technical scheme of an aluminum alloy battery guard plate spraying device and a spraying process thereof: An aluminum alloy battery guard plate spraying device, comprising a flat spray cavity 1, the top of the flat spray cavity 1 is provided with an air cavity 2, the front and rear ends of the flat spray cavity 1 are throughly provided, the rear end of the air cavity 2 is closed, the inside of the flat spray cavity 1 is provided with a plurality of partitions 13, a plurality of spraying zones are formed between the plurality of partitions 13 and the inner wall of the flat spray cavity 1, air holes 15 are formed at the connection between the flat spray cavity 1 and the air cavity 2 above the spraying zones, and electrode needles 21 are arranged on the inner top surface of the air cavity 2 above the air holes 15.

[0025] As shown in Figures 1-9 The rear end of the flat spray cavity 1 is slidably connected with the right side plate 31 and the left side plate 35, and the top of the right side plate 31 and the left side plate 35 is provided with a top connecting plate 33, and the threaded rotating shaft 34 is rotatably connected to the top connecting plate 33, that is, the threaded rotating shaft 34 rotates on the top connecting plate 33.

[0026] It should be noted that the rear end of the air cavity 2 is provided with a support rod 4, that is, the air cavity 2 is fixedly connected with the support rod 4 at the rear end of the air cavity 2, and the top of the support rod 4 is provided with a high-voltage electrostatic generator 5, and the high-voltage electrostatic generator 5 is connected with a plurality of electrode needles 21 through wires 22. It should be noted that the specific structure of the high-voltage electrostatic generator 5 is a prior art, which is used to generate and output a controllable, high-voltage, low-current direct current or pulse voltage, and will not be described in detail here. The wire 22 is provided with the same number of strips as the number of electrode needles 21, and the wire 22 electrically connects the high-voltage electrostatic generator 5 and the plurality of electrode needles 21. The specific connection method is a prior art and will not be described in detail here.

[0027] As shown in Figures 1-9 The rear end of the right side plate 31 and the left side plate 35 is provided with a U-shaped plate 6, and the upper and lower sides of the right side plate 31, the left side plate 35 and the U-shaped plate 6 are fixedly connected with an elastic film layer 61, and the material of the elastic film layer 61 is selected from rubber. The rear end of the U-shaped plate 6 is provided with a connector 62, which is in communication with the inside of the U-shaped plate 6, and the connector 62 is provided in a tubular shape. It should be noted that the two ends of the U-shaped plate 6 are fixedly connected with the right side plate 31 and the left side plate 35 respectively, the height of the U-shaped plate 6 is the same as the height of the right side plate 31 and the left side plate 35, and the top surface of the U-shaped plate 6 is flush with the top surface of the right side plate 31 and the left side plate 35. Correspondingly, the bottom surface of the U-shaped plate 6 is flush with the bottom surface of the right side plate 31 and the left side plate 35. It should be noted that the side of the elastic film layer 61 facing the air cavity 2 is attached to the rear end side of the air cavity 2 to improve the sealing of the movable cavity 3 composed of the right side plate 31, the left side plate 35, the U-shaped plate 6 and the elastic film layer 61.

[0028] As shown in Figures 1-9As shown, in an optional embodiment, the rear end of the flat spray cavity 1 is provided with sliding rails 12 on both upper and lower sides, the rear end of the flat spray cavity 1 is provided with side blocks 14 on both left and right sides, the position of the top connecting plate 33 on the right side plate 31 or the left side plate 35 is staggered, the front end of the right side plate 31 and the left side plate 35 is provided with a butt sliding block 32 on both upper and lower sides, and the butt sliding block 32 is in sliding connection with the sliding rail 12. It needs to be pointed out that the vertical section of the sliding rail 12 is in horizontal U shape, and the vertical section of the butt sliding block 32 is also in horizontal U shape. The sliding rail 12 and the butt sliding block 32 are matched to make the gap between the right side plate 31 and the sliding rail 12 and the gap between the left side plate 35 and the sliding rail 12 smaller when the right side plate 31 or the left side plate 35 slides on the sliding rail 12, thereby improving the sealing performance of the movable cavity 3 composed of the right side plate 31, the left side plate 35, the U-shaped plate 6 and the elastic film layer 61. It needs to be pointed out that, as shown in Figure 8 and Figure 9 As shown, the position of the top connecting plate 33 on the right side plate 31 or the left side plate 35 is staggered, which is to avoid the interference between the two threaded rotating shafts 34 threadedly connected on the support rod 4, as shown in Figure 3

[0029] As shown in Figures 1-3 In an optional embodiment, the threaded rotating shaft 34 penetrates the support rod 4 and is threadedly connected therewith, and the other end of the threaded rotating shaft 34 away from the right side plate 31 or the left side plate 35 is provided with a rotating head 36. The surface of the rotating head 36 is rough, which facilitates the user to rotate the rotating head 36 to rotate the threaded rotating shaft 34. When the distance between the left side plate 35 and the right side plate 31 needs to be adjusted during the use of the device, the rotating head 36 only needs to be rotated to drive the threaded rotating shaft 34 to rotate. Since the threaded rotating shaft 34 is respectively connected to the top connecting plate 33, the left side plate 35 and the right side plate 31 are moved closer to or farther away from each other to adjust the distance between them.

[0030] As shown in Figure 6 and Figure 7 In an optional embodiment, the air hole 15 is obliquely provided, the top of the air hole 15 is located behind the bottom, and the electrode needle 21 is located directly above the top of the air hole 15. Through such a design, the high-speed flowing spray material particles in the flat spray cavity 1 cannot enter the air cavity 2 through the air hole 15, thereby avoiding the blockage of the air hole 15 caused by the spray material particles entering the air hole 15, and further affecting the high-pressure ionized air in the air cavity 2 passing through the electrode needle 21 corona discharge into the flat spray cavity 1, thereby greatly improving the reliability and durability of the device.

[0031] ​It should be noted that the front ends of both the right side plate 31 and the left side plate 35 slide against the rear end of the flat spray cavity 1. The slide rail 12 is U-shaped, and the docking slider 32 is also U-shaped. This arrangement improves the sealing of the movable cavity 3, which is composed of the right side plate 31, the left side plate 35, the U-shaped plate 6, and the elastic membrane layer 61. The recesses of the slide rail 12 and the docking slider 32 face opposite directions and engage with each other, preventing the right side plate 31 and the left side plate 35 from detaching from the slide rail 12. Similarly, the side stop 14 also prevents the right side plate 31 and the left side plate 35 from detaching from both ends of the slide rail 12, thus improving the reliability of the device.

[0032] Reference Figures 1-9 As shown, in an optional embodiment, the thickness of the front end faces of the right side plate 31 and the left side plate 35 is no greater than the thickness of the partition 13. This arrangement ensures that when the distance between the right side plate 31 and the left side plate 35 is adjusted, the left side plate 35 and the right side plate 31 will not obstruct the normal flow of the sprayed material particles within the spraying area separated by the partition 13, resulting in more uniform sprayed material particles from several spraying areas.

[0033] Reference Figure 6 As shown, in an optional embodiment, the front end of the air chamber 2 is located behind the front end of the flat spray chamber 1, and the rear end of the air chamber 2 is flush with the rear end of the flat spray chamber 1. It should be noted that the front end of the flat spray chamber 1 is positioned further forward than the front end of the air chamber 2 to prevent spray material particles ejected from the front end of the flat spray chamber 1 from splashing and entering the air chamber 2 with the outside air, thus gradually clogging the air chamber 2 during long-term use and improving the reliability and durability of the device.

[0034] Reference Figures 1-9 As shown, in an optional embodiment, a nozzle 11 is provided at the front end of the flat spray cavity 1, a handle 41 is provided at the rear end of the support rod 4, and the two side walls connecting the U-shaped plate 6 to the right side plate 31 or the left side plate 35 are elastic. It should be noted that the nozzle 11 includes a front port and a rear port, the front port being flatter than the rear port. The rear port communicates with the interior of the flat spray cavity 1 and is used to collect the sprayed material particles ejected from the spraying area, preventing large-scale splashing of the sprayed material particles. The handle 41 facilitates the user's handling of the device.

[0035] This device, through the arrangement and cooperation of a flat spray cavity 1, an air cavity 2, and electrode needles 21, utilizes the low air pressure inside the air holes 15 caused by the high-speed flow of spray material particles passing through the flat spray cavity 1. This allows the high-voltage ionized air from the air cavity 2, generated by the corona discharge of the electrode needles 21, to rapidly flow into the flat spray cavity 1 and mix thoroughly with the high-speed flow of spray material particles. This results in the spray material particles becoming negatively charged and being sprayed onto the aluminum alloy battery cover to be coated through the front end of the flat spray cavity 1. Furthermore, the flat design of the flat spray cavity 1 makes it easier for the spray material particles to acquire a negative charge, greatly improving the adhesion between the spray material particles and the aluminum alloy battery cover. The device is ingeniously designed, highly efficient, and suitable for widespread application.

[0036] This device, through the arrangement and cooperation of partition 13, right side plate 31, left side plate 35, and U-shaped plate 6, utilizes the adjustable distance between right side plate 31 and left side plate 35 and partition 13 to divide the flat spray cavity 1 into several spraying zones. This allows the device to adjust the spraying width according to the width of the aluminum alloy battery guard plate to be sprayed, thereby improving spraying efficiency and adaptability. At the same time, the arrangement of several spraying zones, combined with the arrangement of several electrode needles 21, ensures that the sprayed material particles in each spraying zone can be mixed with the high-voltage ionized air that rapidly flows in from the air cavity 2, resulting in a more uniform overall charge of the sprayed material particles. This improves spraying efficiency and quality. The device has a compact structure, is easy to operate, and is suitable for widespread application.

[0037] A spraying process for an aluminum alloy battery guard plate spraying device includes the following steps: Step 1: Pumping high-speed flowing spraying material particles into the movable cavity 3, which is composed of a U-shaped plate 6, an elastic film layer 61, a right side plate 31, and a left side plate 35, through a connector 62; Step 2: Connecting the high-voltage electrostatic generator 5 to the power supply, and having the operator hold the handle 41 to align the front nozzle 11 of the flat spray cavity 1 with the aluminum alloy battery guard plate to be sprayed; Step 3: Adjusting the distance between the right side plate 31 and the left side plate 35 according to the length of the aluminum alloy battery guard plate to be sprayed, specifically by rotating the rotating head 36 so that the right side plate 31 or the left side plate 35 moves closer to or further away from the support rod 4. In Step 3, the right side plate 31 or the left side plate 35 is always located on the partition 13 or against the side wall of the side stop 14.

[0038] It should be noted that the specific operation process of pumping high-speed flowing spray material particles from the joint 62 into the movable cavity 3 using existing processes such as dilute phase conveying and dense phase conveying is existing technology and will not be elaborated on here.

[0039] During use, when the high-speed flowing spray material particles pass through the flat spray cavity 1, the air pressure in the area near the flat spray cavity 1 (within the air hole 15) is lower than that in the air cavity 2. Due to the air pressure difference, the high-voltage ionized air discharged by the electrode needle 21 in the air cavity 2 quickly flows into the flat spray cavity 1 and mixes thoroughly with the high-speed flowing spray material particles. At the same time, due to the flat design of the flat spray cavity 1 and its small height, the high-voltage ionized air flowing in from the air hole 15 mixes more easily with the flowing spray material particles. This allows the spray material particles to quickly and fully acquire a negative charge and be sprayed from the front end of the flat spray cavity 1 onto the aluminum alloy battery cover to be sprayed, thereby greatly improving the adhesion between the spray material particles and the aluminum alloy battery cover to be sprayed.

[0040] In this device, the distance between the right side plate 31 and the left side plate 35 can be easily adjusted, and the partition plate 13 divides the flat spray cavity 1 into several spraying areas. This allows the device to adjust the spraying width according to the width of the aluminum alloy battery guard plate to be sprayed, thereby improving spraying efficiency and spraying adaptability. At the same time, the setting of several spraying areas, combined with the setting of several electrode needles 21, allows the spraying material particles in each spraying area to mix with the high-voltage ionized air that rushes in from the air cavity 2. This makes the overall charge of the spraying material particles more uniform, and the spraying material particles sprayed onto the aluminum alloy battery guard plate will adhere tightly, thereby improving spraying efficiency and quality.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An aluminum alloy battery guard plate spraying device, comprising a flat spraying cavity (1), characterized in that: The top of the flat spray cavity (1) is provided with an air cavity (2). The front and rear ends of the flat spray cavity (1) are connected. The rear end of the air cavity (2) is closed. The interior of the flat spray cavity (1) is provided with several partitions (13). Several spraying areas are formed between the partitions (13) and the inner wall of the flat spray cavity (1). Air holes (15) are provided at the connection between the flat spray cavity (1) and the air cavity (2) above the spraying area. Electrode needles (21) are provided on the inner top surface of the air cavity (2) directly above the air holes (15).

2. The aluminum alloy battery guard plate spraying device according to claim 1, characterized in that: The rear end of the flat spray cavity (1) is slidably connected to a right side plate (31) and a left side plate (35). The top of the right side plate (31) and the left side plate (35) are both provided with a top connecting plate (33). A threaded rotating shaft (34) is rotatably connected to the top connecting plate (33). The rear end of the air cavity (2) is provided with a support rod (4), and the top of the support rod (4) is provided with a high voltage electrostatic generator (5). The high voltage electrostatic generator (5) is connected to several electrode needles (21) through wires (22). The rear ends of the right side plate (31) and the left side plate (35) are provided with U-shaped plates (6). The upper and lower sides of the right side plate (31), the left side plate (35) and the U-shaped plate (6) are all fixedly connected with elastic membrane layers (61). The rear end of the U-shaped plate (6) is provided with a connector (62), and the connector (62) communicates with the interior of the U-shaped plate (6). The flat spray cavity (1) is provided with slide rails (12) on both the upper and lower sides of the rear end, and side blocks (14) are provided on both the left and right sides of the rear end. The top connecting plate (33) is located on the right side plate (31) or the left side plate (35) at staggered positions. The front ends of the right side plate (31) and the left side plate (35) are provided with docking sliders (32), and the docking sliders (32) are slidably connected to the slide rails (12).

3. The aluminum alloy battery guard plate spraying device according to claim 2, characterized in that: The threaded rotating shaft (34) passes through the support rod (4) and is threadedly connected to it. A rotating head (36) is provided at the other end of the threaded rotating shaft (34) away from the right side plate (31) or the left side plate (35).

4. The aluminum alloy battery guard plate spraying device according to claim 3, characterized in that: The vent (15) is opened at an angle, with the top of the vent (15) located behind its bottom, and the electrode needle (21) located directly above the top of the vent (15).

5. The aluminum alloy battery guard plate spraying device according to claim 4, characterized in that: The front ends of the right side plate (31) and the left side plate (35) slide against the rear end of the flat spray cavity (1). The slide rail (12) is U-shaped and the docking slider (32) is U-shaped.

6. The aluminum alloy battery guard plate spraying device according to claim 5, characterized in that: The thickness of the front end face of the right side plate (31) and the left side plate (35) is not greater than the thickness of the partition plate (13).

7. The aluminum alloy battery guard plate spraying device according to claim 6, characterized in that: The front end of the air cavity (2) is located behind the front end of the flat spray cavity (1), and the rear end of the air cavity (2) is flush with the rear end of the flat spray cavity (1).

8. The aluminum alloy battery guard plate spraying device according to claim 7, characterized in that: The front end of the flat spray cavity (1) is provided with a nozzle (11), the rear end of the support rod (4) is provided with a handle (41), and the two side walls of the U-shaped plate (6) connected to the right side plate (31) or the left side plate (35) are elastic.

9. A spraying process for an aluminum alloy battery guard plate spraying device, based on the aluminum alloy battery guard plate spraying device as described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Pump high-speed flowing spray material particles into the movable cavity (3) composed of U-shaped plate (6), elastic membrane layer (61), right side plate (31) and left side plate (35) through the connector (62); Step 2: Connect the high voltage electrostatic generator (5) to the power supply, and the staff holds the handle (41) to make the front nozzle (11) of the flat spray chamber (1) aim at the aluminum alloy battery guard plate to be sprayed. Step 3: Adjust the distance between the right side plate (31) and the left side plate (35) according to the length of the aluminum alloy battery guard plate to be sprayed. Specifically, rotate the rotating head (36) so that the right side plate (31) or the left side plate (35) is closer to or further away from the support rod (4).

10. The spraying process of the aluminum alloy battery guard plate spraying device according to claim 9, characterized in that: In step three, the right side plate (31) or the left side plate (35) is always located on the partition (13) or attached to the side wall of the side block (14).

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