Method for simultaneously spraying multiple surfaces of lithium battery

Abstract

A method for simultaneously spraying multiple surfaces of a lithium battery (100), involving a base (1), a spraying position (2) arranged in the middle of the base (1), side spraying devices (21) arranged on the periphery of the spraying position (2), and a feeding device (3), wherein curing devices (4) are further arranged above or below the side spraying devices (21), and the method comprises the following spraying steps: S1, the feeding device (3) clamps one wall surface of the lithium battery (100) and moves same to the spraying position (2); S2, the side spraying devices (21) located on the periphery of the spraying position (2) move toward positions close to outer side walls of the lithium battery (100), and simultaneously spray the periphery of the lithium battery (100); S3, when the lithium battery (100) has a corner arc surface, adjacent side spraying devices (21) can spray the corner arc surface simultaneously or in a staggered manner; S4, the feeding device (3) can drive the lithium battery (100) to reciprocate in the vertical direction; and S5, when an insulating ink layer of the lithium battery (100) reaches a predetermined thickness, the feeding device (3) drives the lithium battery (100) to move to the positions of the curing devices (4), so as to fix the ink on outer peripheral walls of the lithium battery (100). The feeding device (3) is of a vertical lifting / lowering structure, allowing for simultaneous spraying on the outer peripheral walls of the lithium battery (100).

Description

A method for simultaneously spraying multiple surfaces of a lithium battery Technical Field

[0001] The present invention relates to the field of lithium battery processing equipment, and in particular to a method for achieving simultaneous spraying of multiple surfaces of a lithium battery. Background Art

[0002] In order to ensure the insulation performance of the lithium battery casing, an insulating film is generally attached to the outer wall of the shell or an insulating paint is applied. Among them, the method of spraying insulating paint has better insulation performance and anti-puncture performance, which effectively protects the stability and safety of the lithium battery.

[0003] However, existing spraying methods and equipment are complex and inefficient, and they also take up a lot of space. For example, Chinese patent CN202221472539.3 employs a top-down spraying method to coat a single side of a lithium battery. This method is inefficient and requires multiple mechanical devices to coordinate, flip, rotate, and move the battery. The high cost of the manipulators significantly restricts the widespread adoption and production of these devices.

[0004] At the same time, the existing single-sided spraying method has the following problems: 1. Each surface is solidified and formed in turn, so the shear force and thickness of the insulation layer on each surface are inconsistent. For precision batteries, the insulation difference of a single battery will also affect the stability of the battery pack; 2. The connecting ends between each surface are limited by the spraying gap, so it is generally necessary to spray multiple times at the corner ends to reduce the insulation blind area, and the process time is longer.

[0005] Summary of the Invention

[0006] The main purpose of the present invention is to propose a method for simultaneous spraying of multiple surfaces of a lithium battery, aiming to achieve simultaneous spraying of four or five surfaces of a lithium battery, improve the spraying efficiency, and at the same time improve the stability of the insulating layer.

[0007] To achieve the above-mentioned purpose, the present invention proposes a method for simultaneously spraying multiple surfaces of a lithium battery, comprising a base, a spraying position provided in the middle of the base, a side spraying device provided on the periphery of the spraying position, and a loading device for clamping the lithium battery, wherein a curing device is further provided above or below the side spraying device.

[0008] The spraying steps include:

[0009] S1: The loading device clamps one wall of the lithium battery and moves it to the spraying position;

[0010] S2: The side spray device located at the periphery of the spraying position moves toward a position close to the outer wall of the lithium battery and sprays the periphery of the lithium battery at the same time;

[0011] S3: When the lithium battery has a curved corner surface, the adjacent side spray devices can spray at the same time or staggered spray;

[0012] S4: The loading device can drive the lithium battery to move vertically back and forth;

[0013] S5: When the insulating ink layer of the lithium battery reaches a predetermined thickness, the loading device drives the lithium battery to move to the position of the curing device and fixes the ink on the outer wall of the lithium battery.

[0014] The loading device of the technical solution of the present invention adopts a vertical lifting structure, which can realize simultaneous spraying of the outer wall of the lithium battery. The spraying time and equipment volume are smaller than those of existing equipment. The insulating paint surface strength, shear force and insulating blind area after spraying are smaller, which effectively improves the processing efficiency of lithium batteries and the precision of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a perspective schematic diagram of the present invention;

[0016] FIG2 is a second perspective schematic diagram of the present invention;

[0017] Figure 3 is a schematic diagram of a side spray device;

[0018] Figure 4 is a second schematic diagram of the side spray device.

[0019] In the figure, 1 is the base, 2 is the spraying position, 21 is the side spraying device, 22 is the top spraying device, 3 is the loading device, 31 is the clamping device, 4 is the curing device, 5 is the guide rail, 51 is the vertical moving device, 61 is the horizontal moving frame, 62 is the axial rotation device, and 100 is the lithium battery. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0022] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] As shown in Figures 1 to 4, a method for simultaneously spraying multiple surfaces of a lithium battery comprises a base 1, a spraying station 2 provided in the middle of the base 1, a side spraying device 21 provided on the periphery of the spraying station 2, and a loading device 3 for clamping the lithium battery 100. A curing device 4 is further provided above or below the side spraying device 21.

[0024] The spraying steps include:

[0025] S1: The loading device 3 clamps one wall surface of the lithium battery 100 and moves to the spraying position 2;

[0026] S2: The side spray device 21 located at the periphery of the spraying position 2 moves toward a position close to the outer wall of the lithium battery 100 and sprays the periphery of the lithium battery 100 simultaneously;

[0027] S3: When the lithium battery 100 has a corner arc surface, the adjacent side spray devices 21 can spray simultaneously or staggered. During spraying, simultaneous spraying can make the insulating paint spray distribution on the corner arc surface more uniform, and the insulation shear force after later molding is more stable, but there will be a problem of larger thickness; staggered spraying can make the ink droplets after spraying more uniformly distributed;

[0028] S4: The loading device 3 can drive the lithium battery 100 to move vertically back and forth;

[0029] S5: When the insulating ink layer of the lithium battery 100 reaches a predetermined thickness, the loading device 3 drives the lithium battery 100 to move to the position of the curing device 4 and fixes the ink on the outer wall of the lithium battery 100.

[0030] The feeding device 3 adopts a vertical lifting structure, which can realize simultaneous spraying of the outer wall of the lithium battery 100. The spraying time and equipment volume are smaller than those of existing equipment. The insulating paint surface strength, shear force and insulating blind area after spraying are smaller, which effectively improves the processing efficiency and product precision of the lithium battery 100.

[0031] Specifically, the loading device 3 is disposed above or below the base 1 , and the loading device 3 is provided with a clamping device 31 .

[0032] In an embodiment of the present invention, the loading device 3 includes a guide rail 5 and a slider arranged on the guide rail 5, the slider is provided with a vertical moving device 51, and the vertical moving device 51 is provided with the clamping device 31, thereby realizing continuous spraying processing of the lithium battery 100.

[0033] Furthermore, the clamping device 31 is a suction cup, wherein the use of the suction cup can reduce the spraying blind area of ​​the lithium battery 100 and improve the spraying efficiency.

[0034] Furthermore, the guide rail 5 is a linear guide rail 5 or a closed-loop annular guide rail 5. Different guide rails 5 are selected according to actual needs, wherein the annular guide rail 5 can realize the reciprocating continuous motion of the jig. For example, a spraying mechanism is arranged at intervals on the guide rail 5, thereby realizing high-efficiency lithium battery 100 paint spraying, and the overall volume is small; of course, the smaller volume equipment is preferably a linear guide rail.

[0035] In the embodiment of the present invention, when the lithium battery 100 is a long cube, four side spray devices 21 are provided; the side spray devices 21 are UV digital ink spray devices, and the curing device 4 is a UV lamp.

[0036] Specifically, the spraying position 2 is provided with a top surface spraying device 22 in a direction away from the loading device 3 . The top surface spraying device 22 can be set above or below the base 1 according to actual needs; the top surface spraying device 22 is provided on the vertical moving device 51 .

[0037] In an embodiment of the present invention, the side spray device 21 is arranged on a horizontal movable frame 61, and the horizontal movable frame 61 can drive the ink spraying surface of the side spray device 21 to move between a position close to the lithium battery 100 and a position away from the lithium battery 100; the horizontal movable frame 61 is provided with an axial rotation device 62, and the axial rotation device 62 can drive the bottom plate to tilt and swing. By tilting the spraying device, a smaller spacing between ink droplets can be achieved.

[0038] Specifically, when the spacing between each nozzle row is 0.114mm, when the baseplate is rotated axially by α, the spacing between ink droplets becomes 0.114*cosαmm. When the nozzles are tilted, the number of nozzles participating in the spraying increases within the same area, and the spacing between ink droplets decreases, which increases the density of the insulation material and thus improves insulation performance.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A method for simultaneously spraying multiple surfaces of a lithium battery, characterized in that: It includes a base, a spraying position arranged in the middle of the base, a side spraying device arranged on the periphery of the spraying position, and a feeding device for clamping lithium batteries. A curing device is also arranged above or below the side spraying device. The spraying steps include: S1: The loading device clamps one wall surface of the lithium battery and moves to the spraying position; S2: The side spray device located at the periphery of the spraying position moves toward a position close to the outer side wall of the lithium battery, and sprays the periphery of the lithium battery at the same time; S3: When the lithium battery has a corner arc surface, the adjacent side spray devices can spray at the same time or staggered spray; S4: The feeding device can drive the lithium battery to move vertically back and forth; S5: When the insulating ink layer of the lithium battery reaches a predetermined thickness, the loading device drives the lithium battery to move to the position of the curing device and fixes the ink on the outer wall of the lithium battery.

2. The method for simultaneously spraying multiple surfaces of a lithium battery as claimed in claim 1, characterized in that: The feeding device is arranged above or below the base, and the feeding device is provided with a clamping device.

3. The method for simultaneously spraying multiple surfaces of a lithium battery as claimed in claim 2, characterized in that: The feeding device comprises a guide rail and a slider arranged on the guide rail, the slider is provided with a vertical moving device, and the vertical moving device is provided with the clamping device.

4. The method for simultaneously spraying multiple surfaces of a lithium battery as claimed in claim 2, characterized in that: The clamping device is a suction cup.

5. The method for simultaneously spraying multiple surfaces of a lithium battery as claimed in claim 3, characterized in that: The guide rail is a linear guide rail or a closed-loop annular guide rail.

6. The method for simultaneously spraying multiple surfaces of a lithium battery as claimed in claim 1, characterized in that: When the lithium battery is a long cube, four side spray devices are provided; the side spray devices are UV digital ink spray devices, and the curing device is a UV lamp.

7. The method for simultaneously spraying multiple surfaces of a lithium battery as claimed in claim 1, characterized in that: The spraying position is provided with a top surface spraying device in a direction away from the feeding device.

8. The method for simultaneously spraying multiple surfaces of a lithium battery as claimed in claim 1, characterized in that: The side spray device is arranged on a horizontal movable frame, and the horizontal movable frame can drive the ink spray surface of the side spray device to move between a position close to the lithium battery and a position far away from the lithium battery; the horizontal movable frame is provided with an axial rotation device, and the axial rotation device can drive the bottom plate to tilt and swing.

9. The method for simultaneously spraying multiple surfaces of a lithium battery as claimed in claim 1, characterized in that: When the spacing between each column of nozzles is 0.114 mm, when the base plate rotates axially by α, the spacing between ink droplets becomes 0.114*cosαmm.

10. The method for simultaneously spraying multiple surfaces of a lithium battery as claimed in claim 7, characterized in that: The top surface spraying device is arranged on the vertical moving device.

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