Efficient dry ice probe cleaning mechanism for lithium ion battery and probe cleaning method

Abstract

The invention relates to an efficient dry ice probe cleaning mechanism for a lithium ion battery and a probe cleaning method, and belongs to the technical field of lithium ion battery probe cleaning. According to the structure, an X-Y-axis sliding table mechanism, a movable energy storage power source and a driving device of an X-Y-axis sliding table motor are arranged in a mechanism body; a vacuum buffer filtering box and a vacuum generating device are connected to a platform of the X-Y-axis sliding table mechanism, and a plurality of air pipe joints are arranged on the vacuum buffer filtering box; a dry ice cleaning mechanism is arranged on the outer side of the vacuum buffer filtering box, the ends of a plurality of air pipe nozzles in the dry ice cleaning mechanism are of a double-layer structure, the outer layer is an annular negative pressure dust removal cover, and the inner layer is air pipe nozzles; the annular negative-pressure dust removal cover is connected with an air pipe joint through a negative-pressure interface; the air pipes are jointly connected with an external dry ice pipeline through pipelines. According to the mechanism, the mode that after dry ice cleaning, compressed air is used for secondary blowing is adopted, efficient non-contact probe cleaning is achieved, the cleaning efficiency is improved, and the service life of the probe is prolonged.

Description

Technical Field

[0001] The invention relates to an efficient dry ice cleaning probe mechanism and a probe cleaning method for a lithium ion battery, belonging to the technical field of lithium ion battery probe cleaning. Background Art

[0002] As a device that converts chemical energy into electrical energy, batteries are widely used in various electronic devices, electric vehicles and renewable energy storage systems. The electrical performance, safety and cycle life of lithium batteries directly affect the efficiency and reliability of these devices.

[0003] The chemical composition and capacity system of lithium-ion batteries can achieve high-precision charging and discharging of lithium batteries. However, in the actual production process, particles at the bottom of the battery adhere to the probe surface or residual electrolyte at the bottom of the shell contaminates and corrodes the oxidized probe surface, resulting in poor consistency in test data, which may seriously affect the safety performance of the battery. However, the maintenance and cleaning of the probe is still a recognized industry problem. At present, the common cleaning method in the industry is mainly manual cleaning, which is not only inefficient, but may also cause damage to the probe due to improper operation. Especially when wiping precision probes with tiny serrations, manual cleaning is difficult to completely remove surface oxides and chemical residues. Facts have proved that the results of manual wiping and cleaning are not ideal.

[0004] Or semi-automatic or manual mechanical cleaning equipment, which uses physical contact such as brushes to damage sensitive probes. The strong scrubbing or brushing action of the machine may cause the probe to bend or break, especially when the probes are densely installed or the design is relatively delicate. In addition, mechanical cleaning is often difficult to adapt to the specific needs of probes of different shapes and sizes, resulting in incomplete cleaning or inability to clean, which affects the long-term use and maintenance costs of the equipment. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an efficient dry ice cleaning probe mechanism for lithium-ion batteries. The mechanism adopts a method of using dry ice cleaning and then using compressed air for secondary purging, so that the dry ice will quickly sublimate after being sprayed out and the gas will expand to 800 times and then enter the cracks of the dirt to peel off the dirt or oxides attached to the surface of the object, thereby realizing an efficient non-contact cleaning probe, improving the cleaning efficiency and extending the service life of the probe.

[0006] To solve the above problems, the specific technical scheme of the present invention is as follows: a lithium-ion battery efficient dry ice cleaning probe mechanism, an XY-axis slide mechanism, a mobile energy storage power supply and a driving device of the XY-axis slide motor are arranged in the main body of the mechanism; the mobile energy storage power supply provides power for the power device of the XY-axis slide mechanism, and the driving device of the XY-axis slide mechanism controls the movement direction and distance of the XY-axis slide mechanism; a vacuum buffer filter box is connected to the platform of the XY-axis slide mechanism, one end of the vacuum buffer filter box is connected to a vacuum generating device, and a plurality of air pipe joints are arranged on the vacuum buffer filter box; a dry ice cleaning mechanism is arranged on the outside of the vacuum buffer filter box, and the ends of the plurality of air pipe nozzles in the dry ice cleaning mechanism are double-layer structures, the outer layer is an annular negative pressure dust removal cover, and the inner layer is an air pipe nozzle and the air pipe at the bottom are integrated and correspond to the position of the lithium battery probe; a negative pressure interface communicating with the annular cavity is arranged on the annular negative pressure dust removal cover, and the negative pressure interface is connected to the air pipe joint through a vacuum hose; and a plurality of air pipes are connected to the external dry ice pipeline through a pipeline.

[0007] The dry ice cleaning mechanism also includes an air circuit module and a pipeline; a dry ice gas quick-connect connector and a compressed air quick-connect connector are respectively provided on the main body of the mechanism; a plurality of air pipe ends are sealed and plugged with the air circuit module, and the two ends of the air circuit module are respectively connected to the dry ice gas quick-connect connector and the compressed air quick-connect connector through the pipeline; and air pipes are connected in parallel to each air circuit module.

[0008] The number of the gas path modules is four, and they are symmetrically arranged on both sides of the vacuum buffer filter box.

[0009] The external frame structure of the mechanism body is designed in the same manner as the external frame of the lithium-ion battery tray.

[0010] The XY-axis slide mechanism comprises an X-axis motor, an umbrella-shaped bevel gear set, an X-axis lead screw, a Y-axis motor, a synchronous pulley, a synchronous belt and a Y-axis lead screw; wherein the vertical X-axis motor drives the X-axis lead screw to rotate through the umbrella-shaped bevel gear set, and the nut on the X-axis lead screw drives the X platform to move along the X-axis direction; the Y-axis motor drives the Y-axis lead screw to rotate through the synchronous pulley and the synchronous belt, and the nut on the Y-axis lead screw drives the Y platform to move along the Y-axis direction.

[0011] The integrated control board drives the mechanism of the present invention after receiving the wireless signal sent by the host computer, and can wirelessly transmit the fault feedback signal to the external host computer.

[0012] According to the above-mentioned cleaning method of the efficient dry ice cleaning probe mechanism of the lithium ion battery, the following steps are included: S1: Before the lithium-ion battery efficient dry ice cleaning probe mechanism is put into use, manually turn on the mobile energy storage power switch to ensure that the integrated control board can achieve wireless communication connection with the external host computer; S2: The mechanism of the present invention is manually placed in the charging and discharging vertical warehouse system, and the stacker arrives at the location according to the instruction of the dispatching system to take the mechanism of the present invention and put it into the warehouse location required by the instruction; S3: After receiving the external host computer command, the integrated control board sends it to the driver, driving the XY slide mechanism to drive the dry ice cleaning mechanism on the Y platform to move according to the set program. Each air pipe nozzle of the dry ice cleaning mechanism corresponds to each probe of the lithium battery one by one; S4: The movement of the XY slide mechanism starts from the lower left starting point and ends at the lower right end point; the stepping distance of the XY slide mechanism is a multiple of the distance between the probe needle plates; the double-group gas path modules on both sides are set to be opened at the same time, and the two group gas path modules located on the outside are connected by pipelines and connected to the compressed air quick-plug connectors; the two group gas path modules located on the inside are connected by pipelines and connected to the dry ice gas quick-plug connectors; during the cleaning operation, after the XY slide mechanism steps into place, the air pipe nozzle connected to the group gas path module located on the inside sprays dry ice gas to clean the probe working surface, and after stepping and shifting again, the air pipe nozzle connected to the group gas path module located on the outside sprays compressed air gas to perform a second purge on the probe that has just been cleaned with dry ice gas; the vacuum generating device is always in the on state, and impurities are adsorbed into the vacuum buffer filter box through the annular negative pressure dust removal hood and the vacuum hose.

[0013] The S4 step is replaced as follows: the XY slide mechanism moves from the lower left starting point to the lower right end point; the stepping distance of the XY slide mechanism is a multiple of the probe needle plate spacing; the double-group gas path modules on both sides are opened at the same time, and the dry ice gas quick-connect connectors are connected through the pipeline at the same time, and the air pipe nozzle sprays dry ice gas from the starting point to the end point to clean the probe working surface; then the pipeline is connected to the compressed air quick-connect connector at the same time, and then from the starting point to the end point, the probe that has just been cleaned with dry ice gas is purged for the second time; the vacuum generating device is always in the on state, and impurities are adsorbed into the vacuum buffer filter box through the annular negative pressure dust removal hood and the vacuum hose.

[0014] The lithium-ion battery efficient dry ice cleaning probe mechanism of the present application adopts the above structure and has the following advantages: A structure combining dry ice purging and annular negative pressure dust removal is adopted, so that the dirt or oxide on the probe surface is first frozen and embrittled to produce cracks, and at the same time the viscous dirt will become solid, wherein the embrittlement increases and the viscosity decreases, and the adhesion of the dirt on the probe surface is suddenly reduced, so that part of the dirt will be automatically peeled off. Similarly, the dry ice will quickly sublimate after being sprayed, and the gas will expand to 800 times and then enter the cracks of the dirt, peeling off the dirt or oxides attached to the surface of the object, avoiding the physical damage to the probe that may be caused to the probe in traditional cleaning. The invention has outstanding advantages in dealing with complex probes with multiple tiny and precise probes.

[0015] During the movement of the nozzle, the dust removal port on the annular negative pressure dust removal hood can achieve synchronous movement for adsorption and discharge, which extends the service life of the probe and realizes the automatic transportation, transplantation and gas docking of the probe cleaning equipment, which significantly improves the maintenance efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective view of the probe mechanism for efficient dry ice cleaning of lithium-ion batteries.

[0017] Figure 2 It is a three-dimensional diagram of the XY-axis slide mechanism.

[0018] Figure 3 This is a structural diagram of the dry ice cleaning mechanism.

[0019] Figure 4 It is a schematic diagram of the structure of the air pipe nozzle and the annular negative pressure dust hood.

[0020] Figure 5 Schematic diagram of the dry ice cleaning probe step in Example 2.

[0021] Figure 6 Schematic diagram of the dry ice cleaning probe step in Example 3. DETAILED DESCRIPTION Embodiment 1

[0022] like Figures 1 to 4 As shown, a lithium-ion battery efficient dry ice cleaning probe mechanism is provided, wherein an XY-axis slide mechanism 2, a mobile energy storage power supply 3 and a driving device 7 of the XY-axis slide mechanism are provided in a mechanism body 1; the mobile energy storage power supply 3 provides power for a power device of the XY-axis slide mechanism 2, and the driving device 7 of the XY-axis slide motor controls the movement direction and distance of the XY-axis slide mechanism 2; a vacuum buffer filter box 10 is connected to the platform of the XY-axis slide mechanism 2, one end of the vacuum buffer filter box 10 is connected to a vacuum generating device 11, and a vacuum buffer filter box 10 is provided There are several air pipe joints 10-1; a dry ice cleaning mechanism 18 is provided on the outside of the vacuum buffer filter box 10, and the ends of several air pipe nozzles 8-1 in the dry ice cleaning mechanism 18 are double-layer structures, the outer layer is an annular negative pressure dust removal cover 12-1, and the inner layer is an air pipe nozzle 12-3 and the air pipe 12-2 at the bottom are an integrated structure, and the position corresponds to the lithium battery probe 16; a negative pressure interface 12-4 communicating with the annular cavity is provided on the annular negative pressure dust removal cover 12-1, and the negative pressure interface 12-4 is connected to the air pipe joint 10-1 through a vacuum hose 8-4 ( Figure 3 Only one vacuum hose 8-4 is shown as being connected); a plurality of air pipes 12-2 are connected to an external dry ice pipeline through a pipeline.

[0023] The dry ice cleaning mechanism 18 also includes an air circuit module 8-2 and a pipeline 8-3; a dry ice gas quick-connect connector 5 and a compressed air quick-connect connector 6 are respectively provided on the mechanism body 1; the ends of several air pipes 12-2 are sealed and plugged with the air circuit module 8-2, and the two ends of the air circuit module 8-2 are respectively connected to the dry ice gas quick-connect connector 5 and the compressed air quick-connect connector 6 through the pipeline 8-3; the number of the air circuit modules 8-2 is four, and they are symmetrically arranged on both sides of the vacuum buffer filter box 10; an equal number of air pipes 12-2 are connected in parallel to each air circuit module 8-2.

[0024] The external frame structure of the mechanism body 1 is designed in the same manner as the external frame of the lithium-ion battery tray, and its benefit is that it can realize in-place sensing confirmation and utilize a positioning mechanism to position the mechanism of the present invention in the charging and discharging storage location, just like a battery tray; the integrated control board 40 has the function of driving the mechanism of the present invention after receiving a wireless signal from a host computer, and can wirelessly transmit fault feedback signals to an external host computer, thereby further improving the degree of automation of the equipment.

[0025] like Figure 2 As shown, the XY axis slide mechanism 2 includes an X axis motor 31, an umbrella bevel gear set 32, an X axis screw 33, a Y axis motor 21, a synchronous pulley 22, a synchronous belt 26 and a Y axis screw 25; wherein the vertical X axis motor 31 drives the X axis screw 33 to rotate through the umbrella bevel gear set 32, and the nut on the X axis screw 33 drives the X platform 20 to move along the X axis direction; the Y axis motor 21 drives the Y axis screw 25 to rotate through the synchronous pulley 22 and the synchronous belt 26, and the nut on the Y axis screw 25 drives the Y platform 24 to move along the Y axis direction, and guide rails are respectively provided on both sides of the lower surface of the X platform 20 and the Y platform 24 to facilitate the movement and guidance. The design core of the installation position and transmission mode of the X axis motor 31 and the Y axis motor 21 is based on the optimal spatial layout of the mechanism of the present invention. At the same time, the mobile energy storage power supply 3 can independently provide power supply for the X axis motor 31 and the Y axis motor 21, solving the problem of artificial power docking and low efficiency between different charging and discharging storage positions in the current technology. Embodiment 2

[0026] Based on the efficient dry ice cleaning probe mechanism for lithium ion batteries of the first embodiment, a method for efficiently cleaning lithium ion batteries includes the following steps: S1: Before the lithium-ion battery efficient dry ice cleaning probe mechanism is put into use, the mobile energy storage power supply 3 is manually turned on to ensure that the integrated control board 40 can achieve wireless communication connection with the external host computer; S2: The mechanism of the present invention is manually placed in the charging and discharging vertical warehouse system, and the stacker arrives at the location according to the instruction of the dispatching system to take the mechanism of the present invention and put it into the warehouse location required by the instruction; S3: After receiving the external host computer command, the integrated control board 40 sends it to the driver 7, driving the XY slide mechanism 2 to drive the dry ice cleaning mechanism 18 on the Y platform 24 to move according to the set program, and each air pipe nozzle 17 of the dry ice cleaning mechanism 18 corresponds to each probe 16 of the lithium battery one by one; S4: Figure 5 As shown, the movement of the XY slide mechanism 2 starts from the lower left starting point and ends at the lower right end point; the stepping distance of the XY slide mechanism 2 is a multiple of the distance between the needle plates of the probe 16; the double groups of gas path modules 8-2 on both sides are set to be opened at the same time, and the two groups of gas path modules 8-2 located on the outside are connected by pipelines and connected to the compressed air quick-plug connector 6; the two groups of gas path modules 8-2 located on the inside are connected by pipelines and connected to the dry ice gas quick-plug connector 5; during the cleaning operation, after the XY slide mechanism 2 steps into place, the air pipe nozzle 8-1 connected to the group of gas path modules 8-2 located on the inside sprays dry ice gas to clean the working surface of the probe 16, and after stepping and shifting again, the air pipe nozzle 8-1 connected to the group of gas path modules 8-2 located on the outside sprays compressed air gas to perform a second purge on the probe 16 that has just been cleaned with dry ice gas; the vacuum generating device 11 is always in the open state, and impurities are adsorbed into the vacuum buffer filter box 10 through the annular negative pressure dust removal cover 12-1 and the vacuum hose 8-4. Embodiment 3

[0027] Based on the efficient cleaning method for ion batteries in Example 2, step S4 is replaced by: Figure 6 As shown, the XY slide mechanism 2 moves from the lower left starting point to the lower right end point; the stepping distance of the XY slide mechanism 2 is a multiple of the distance between the needle plates of the probe 16; the double-group gas path modules 8-2 on both sides are opened at the same time, and the dry ice gas quick connector 5 is connected through the pipeline at the same time, and the air pipe nozzle 8-1 sprays dry ice gas from the starting point to the end point to clean the working surface of the probe 16; then the pipeline is connected to the compressed air quick connector 6 at the same time, and then from the starting point to the end point, the probe 16 that has just been cleaned with dry ice gas is purged for the second time; the vacuum generating device 11 is always in the open state, and impurities are adsorbed into the vacuum buffer filter box 10 through the annular negative pressure dust removal cover 12-1 and the vacuum hose 8-4.

[0028] For those skilled in the art, it is possible to design the specific number of air path modules 8-2 and the layout of the air pipe nozzles 8-1 according to the needle points of the lithium-ion battery storage location, so that each air pipe nozzle of the dry ice cleaning mechanism corresponds one-to-one to each probe of the lithium-ion battery; the stepping distance of the XY slide mechanism is a multiple of the probe needle plate spacing, for example: if the dry ice cleaning mechanism on the Y platform is 1 column on one side, then the stepping distance of the XY slide mechanism is 1 probe needle plate spacing; if the dry ice cleaning mechanism on the Y platform is 2 columns on one side, then the stepping distance of the XY slide mechanism is 2 probe needle plate spacings; if the dry ice cleaning mechanism on the Y platform is n columns on one side, then the stepping distance of the XY slide mechanism is n probe needle plate spacings; and so on.

Claims

1. A lithium-ion battery efficient dry ice cleaning probe mechanism, characterized in that: An XY-axis slide mechanism (2), a mobile energy storage power supply (3) and a driving device (7) of an XY-axis slide motor are provided in a mechanism body (1); the mobile energy storage power supply (3) provides power to a power device of the XY-axis slide mechanism (2), and the driving device (7) of the XY-axis slide mechanism controls the movement direction and distance of the XY-axis slide mechanism (2); a vacuum buffer filter box (10) is connected to the platform of the XY-axis slide mechanism (2), one end of the vacuum buffer filter box (10) is connected to a vacuum generating device (11), and a plurality of air pipe joints (10-1) are provided on the vacuum buffer filter box (10); ) is provided on the outside of the dry ice cleaning mechanism (18); the ends of the plurality of air pipe nozzles (8-1) in the dry ice cleaning mechanism (18) are double-layer structures, the outer layer being an annular negative pressure dust removal cover (12-1), the inner layer being an air pipe nozzle (12-3) and an air pipe (12-2) at the bottom being an integrated structure and corresponding to the position of the lithium battery probe (16); a negative pressure interface (12-4) communicating with the annular cavity is provided on the annular negative pressure dust removal cover (12-1), the negative pressure interface (12-4) being connected to the air pipe joint (10-1) via a vacuum hose (8-4); and the plurality of air pipes (12-2) are connected to an external dry ice pipeline via a pipeline.

2. The efficient dry ice cleaning probe mechanism for lithium-ion batteries according to claim 1, characterized in that: The dry ice cleaning mechanism (18) further comprises an air circuit module (8-2) and a pipeline (8-3); a dry ice gas quick-connect connector (5) and a compressed air quick-connect connector (6) are respectively provided on the mechanism body (1); the ends of a plurality of air pipes (12-2) are sealed and plugged with the air circuit module (8-2); the two ends of the air circuit module (8-2) are respectively connected to the dry ice gas quick-connect connector (5) and the compressed air quick-connect connector (6) via the pipeline (8-3); and each air circuit module (8-2) is connected in parallel to an air pipe (12-2).

3. The efficient dry ice cleaning probe mechanism for lithium-ion batteries according to claim 2, characterized in that: The number of the gas path modules (8-2) is four, and they are symmetrically arranged on both sides of the vacuum buffer filter box (10).

4. The efficient dry ice cleaning probe mechanism for lithium-ion batteries according to claim 1, characterized in that: The external frame structure of the mechanism body (1) is designed to be the same as the external frame of the lithium-ion battery tray.

5. The efficient dry ice cleaning probe mechanism for lithium-ion batteries according to claim 1, characterized in that: The XY-axis slide mechanism (2) comprises an X-axis motor (31), an umbrella-shaped bevel gear set (32), an X-axis screw (33), a Y-axis motor (21), a synchronous pulley (22), a synchronous belt (26) and a Y-axis screw (25); wherein the vertical X-axis motor (31) drives the X-axis screw (33) to rotate via the umbrella-shaped bevel gear set (32), and the nut on the X-axis screw (33) drives the X-platform (20) to move along the X-axis direction; the Y-axis motor (21) drives the Y-axis screw (25) to rotate via the synchronous pulley (22) and the synchronous belt (26), and the nut on the Y-axis screw (25) drives the Y-platform (24) to move along the Y-axis direction.

6. The efficient dry ice cleaning probe mechanism for lithium-ion batteries according to claim 1, characterized in that: The integrated control panel (40) has the function of driving the mechanism of the present invention after receiving a wireless signal sent by a host computer, and can also wirelessly transmit a fault feedback signal to an external host computer.

7. The cleaning method of the lithium-ion battery efficient dry ice cleaning probe mechanism according to claim 3, characterized in that The following steps are involved: S1: Before the lithium-ion battery efficient dry ice cleaning probe mechanism is put into use, the mobile energy storage power supply (3) is manually turned on to ensure that the integrated control board (40) can achieve wireless communication connection with the external host computer; S2: The mechanism of the present invention is manually placed in the charging and discharging vertical warehouse system, and the stacker arrives at the location according to the instruction of the dispatching system to take the mechanism of the present invention and put it into the warehouse location required by the instruction; S3: After receiving the external host computer command, the integrated control board (40) sends it to the driver (7), driving the XY slide mechanism (2) to drive the dry ice cleaning mechanism (18) on the Y platform (24) to move according to the set program, and each air pipe nozzle (17) of the dry ice cleaning mechanism (18) corresponds to each probe (16) of the lithium battery; S4: The XY slide mechanism (2) moves from the lower left starting point to the lower right end point; the stepping distance of the XY slide mechanism (2) is a multiple of the distance between the needle plates of the probe (16); the two groups of gas path modules (8-2) on both sides are opened at the same time, the two groups of gas path modules (8-2) located on the outside are connected by pipelines and connected to the compressed air quick connector (6); the two groups of gas path modules (8-2) located on the inside are connected by pipelines and connected to the dry ice gas quick connector (5); during the cleaning operation, the XY slide mechanism (2) steps into place Afterwards, the air pipe nozzle (8-1) connected to the gas path module (8-2) located on the inner side ejects dry ice gas to clean the working surface of the probe (16), and after another step-shift, the air pipe nozzle (8-1) connected to the gas path module (8-2) located on the outer side ejects compressed air to perform a second purge on the probe (16) that has just been cleaned by the dry ice gas; the vacuum generating device (11) is always in an open state, and impurities are adsorbed into the vacuum buffer filter box (10) through the annular negative pressure dust removal cover (12-1) and the vacuum hose (8-4).

8. The cleaning method of the lithium-ion battery efficient dry ice cleaning probe mechanism according to claim 7, characterized in that: The step S4 is replaced by: the XY slide mechanism (2) moves from the lower left starting point to the lower right end point; the stepping distance of the XY slide mechanism (2) is a multiple of the distance between the needle plates of the probe (16); the double-group gas path modules (8-2) on both sides are opened at the same time, and are simultaneously connected to the dry ice gas quick connector (5) through the pipeline, and the air pipe nozzle (8-1) sprays dry ice gas from the starting point to the end point to clean the working surface of the probe (16); then the pipeline is simultaneously connected to the compressed air quick connector (6), and then the probe (16) that has just been cleaned with dry ice gas is purged for the second time from the starting point to the end point; the vacuum generating device (11) is always in the open state, and impurities are adsorbed into the vacuum buffer filter box (10) through the annular negative pressure dust removal cover (12-1) and the vacuum hose (8-4).

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