Lithium ion battery dissection experiment system

Abstract

The utility model belongs to the technical field of energy storage, and relates to a lithium ion battery dissection experiment system which comprises a sewage discharge pipeline, a waste gas concentration pipeline, a gas supply system and a fixing frame, an operation bin, a transition bin and a treatment bin which are sequentially connected are arranged on the fixing frame, and operation openings are formed in the operation bin and the treatment bin. An electrolyte discharge port and a gas outlet connected with a waste gas concentration pipeline are formed in the operation bin, a sewage discharge port connected with a sewage discharge pipeline and a gas discharge pipe connected with the waste gas concentration pipeline are arranged on the treatment bin, a treatment assembly and a gas inlet connected with a gas supply system are further arranged in the operation bin, and a spraying assembly is arranged in the treatment bin. The operation bin and the treatment bin are of dome and cone bottom structures, the gas replacement efficiency is high, the inert gas environment guarantees the original surface state of a pole piece, the pole piece is free of deformation and color change, the chemical activity of the pole piece is reduced through pretreatment of the transition bin, the water spraying reaction intensity is reduced, safety is guaranteed, smoke, poison gas and waste water are discharged in an organized mode, and energy conservation and emission reduction are achieved. Environmental protection is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage and relates to a lithium ion battery dissection experiment system. Background Art

[0002] In the process of lithium-ion battery research and manufacturing, it is inevitable to dissect and observe the surface state of the pole piece to judge the quality of battery design and manufacturing process. However, the chemical properties of the negative electrode of lithium-ion battery are very active, and it may explode or explode in ordinary environment. At present, the state of lithium-ion battery pole piece directly affects the capacity and cycle performance of lithium-ion battery. In the process of lithium-ion battery development, it is essential to dissect and observe the internal pole piece state of lithium-ion battery. When dissecting lithium-ion battery, the battery is often in a fully charged state, which makes it easier to observe the defects of the pole piece. However, the chemical properties of the negative pole piece in a fully charged state are very active and have strong reducing properties. When it comes into contact with oxygen or moisture in the air, it reacts rapidly, causing the negative pole piece to curl, the surface color to change rapidly, and even fire and explosion, so that the surface state of the pole piece cannot be fully observed. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art and provide a lithium ion battery dissection experiment system, which can ensure that the negative electrode sheet after dissection does not curl or change color in the environment, and the operation is safe and environmentally friendly.

[0004] The lithium-ion battery dissection experiment system described in the utility model comprises a sewage discharge pipeline, a waste gas collection pipeline, an air supply system and a fixed frame, the fixed frame is provided with an operation chamber, a transition chamber and a processing chamber which are connected in sequence, the operation chamber and the processing chamber are both provided with operation ports, the operation chamber is provided with an electrolyte discharge port and an air outlet connected to the waste gas collection pipeline, the processing chamber is provided with a sewage discharge port connected to the sewage discharge pipeline and an exhaust pipe connected to the waste gas collection pipeline, the operation chamber is also provided with a processing component and an air inlet connected to the air supply system, and the processing chamber is provided with a spray component.

[0005] Working process or working principle:

[0006] Open the entrance of the operation chamber, an entrance cover is provided on the outside of the entrance, and an elastomer is provided on the edge of the entrance cover, which can ensure the sealing between the entrance cover and the chamber body, put the lithium-ion battery to be dissected and the dissecting tools into the operation chamber, close the entrance cover of the operation chamber, place the battery on the processing assembly through the operation port and adjust the appropriate height, open the gas exhaust valve and the air inlet on the operation chamber in turn, continuously replace the air in the operation chamber through the air supply system, and then perform dissection evaluation on the battery. After the battery dissection evaluation is completed, open the entrance of the transition chamber, put the negative electrode sheet into the transition chamber, cover the entrance cover of the transition chamber, and then transfer the pre-treated negative electrode sheet in the transition chamber to the processing chamber through the operation port of the processing chamber, and disperse the negative electrode sheet on the partition covered with small holes, close the outlet of the transition chamber, open the exhaust pipe on the processing chamber and the exhaust port on the cone bottom in turn, start the spray assembly to spray it with water, and the smoke and toxic gas are discharged into the exhaust gas concentration pipe through the exhaust pipe, and the wastewater is discharged into the sewage discharge pipe. After the treatment is completed, open the outlet of the processing chamber, take out the completely inactive negative electrode sheet, and send it to the designated place for preservation to complete the dissection.

[0007] The spray assembly includes a water spray pipe arranged on the top of the processing chamber, a water spray head is provided on the water spray pipe, water spray holes are provided on the front and sides of the water spray head, the water spray head is placed inside the processing box, the water spray head has water spray holes on the front and sides, and water can be sprayed in all directions over a large area. A remote control switch is provided between the water spray pipe joint and the dome, and a manual water spray valve is provided on the water pipe at the other end of the water spray pipe joint.

[0008] The processing assembly includes a fixed block fixed in the operating chamber, a screw is threadedly connected to the fixed block, an operating table is provided on the top of the screw, and a fixing bolt corresponding to the screw is provided on the fixed block. The height of the operating table can be adjusted by rotating the operating table. In order to ensure mechanical strength and stability, metal materials such as aluminum alloy are selected as much as possible.

[0009] The operating table is provided with a plastic table top. A plastic layer is adhered on the metal operating table top to prevent short circuit during the battery dissection process. The thickness of the plastic layer is 3-5mm.

[0010] The gas supply system comprises a gas cylinder and an air compressor.

[0011] The air inlet is provided with a double-channel air inlet valve, which is respectively connected to the gas cylinder and the air compressor, and can independently take in argon gas or compressed air.

[0012] The exhaust pipe is provided with an exhaust fan, and the processing chamber is provided with a one-way air inlet pipe. The smoke and toxic gas generated in the processing chamber are exhausted by the exhaust fan, and the one-way air inlet pipe can maintain the pressure balance in the processing chamber.

[0013] The transition bin is provided with an air inlet valve and an air outlet valve respectively connected to the air compressor and the exhaust gas collection pipeline. After the battery dissection is completed, the negative electrode sheet is transferred into the transition bin. The air outlet valve is opened first, and then the negative electrode sheet is preliminarily oxidized with dry air through the air inlet valve to reduce its chemical reaction activity and avoid excessively violent reaction in subsequent water treatment. The air intake flow rate above the transition bin is adjusted to 0.2-0.8 L / min, and the negative electrode sheet is transferred into the treatment bin after the compressed air is passed for 10-15 minutes.

[0014] An oxygen detector and lighting equipment are provided on the top of the processing chamber, and the detection port of the detector is placed on the inside of the dome. Since the inert gas generally used is argon, the density of argon is greater than the density of air. When the oxygen above the dome meets the standard, the oxygen index in the entire operating chamber will be qualified; the lighting equipment ensures a better visual environment.

[0015] The upper part of the operation chamber and the processing chamber are both dome-shaped, the middle part is cylindrical, and the lower part is conical. The operation chamber body is made of transparent, flame-retardant, and electrolyte corrosion-resistant material. The chamber wall thickness is 5 to 10 mm. Too thick a wall thickness will lead to reduced transparency, and too thin a wall thickness will lead to insufficient mechanical strength. The height of the dome is 0.8 to 1 times the radius of the middle cylinder. The lower the dome height, the greater the resistance encountered when exhausting the gas, which is easy to increase the degree of mixing of the introduced inert gas and air, and reduce the efficiency of exhausting the air.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The dome-shaped cone-bottom structure of the operation chamber and the processing chamber of the utility model has no dead angles and high gas replacement efficiency. The inert gas environment ensures the original surface state of the electrode, and the electrode has no deformation or discoloration. The chemical activity of the electrode is reduced through pretreatment in the transition chamber, and the intensity of the water spraying reaction is reduced to ensure safety. Smoke, toxic gas and wastewater are discharged in an organized manner, which is beneficial to environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0019] In the figure: 1. gas cylinder; 2. operating chamber; 3. oxygen detector; 4. air outlet; 5. lighting equipment; 6. exhaust gas collection pipeline; 7. exhaust fan; 8. exhaust pipe; 9. air compressor; 10. one-way air inlet pipe; 11. processing chamber; 12. operating port; 13. fixing frame; 14. sewage outlet; 15. sewage outlet pipeline; 16. air outlet valve; 17. transition chamber; 18. electrolyte outlet; 19. air inlet; 20. screw; 21. fixing block; 22. partition; 23. operating table; 24. operating chamber entrance; 25. water spraying pipe; 26. water spraying head; 27. transition chamber entrance; 28. processing chamber entrance; 29. ​​processing chamber outlet; 30. fixing bolt; 31. air inlet valve. DETAILED DESCRIPTION

[0020] Example 1

[0021] like Figure 1As shown, the lithium-ion battery dissection experiment system described in the utility model includes a sewage discharge pipe 15, an exhaust gas collection pipe 6, an air supply system and a fixed frame 13, the fixed frame 13 is provided with an operation chamber 2, a transition chamber 17 and a processing chamber 11 which are connected in sequence, the operation chamber 2 and the processing chamber 11 are both provided with an operation port 12, the operation chamber 2 is provided with an electrolyte discharge port 18 and an air outlet 4 connected to the exhaust gas collection pipe 6, the processing chamber 11 is provided with a sewage discharge port 14 connected to the sewage discharge pipe 15 and an exhaust pipe 8 connected to the exhaust gas collection pipe 6, the operation chamber 2 is also provided with a processing component and an air inlet 19 connected to the air supply system, the processing chamber 1 11 is provided with a spray assembly; the spray assembly includes a water spray pipe 25 arranged on the top of the processing chamber 11, the water spray pipe 25 is provided with a water spray head 26, the front and side of the water spray head 26 are provided with water spray holes, the water spray head 26 is placed inside the processing box, the front and side of the water spray head 26 are provided with water spray holes, a large area of ​​omnidirectional water spraying, a remote control switch is provided between the joint of the water spray pipe 25 and the dome, and a manual water spray valve is provided on the water pipe at the other end of the joint of the water spray pipe 25; the processing assembly includes a fixed block 21 fixed in the operating chamber 2, a screw 20 is threadedly connected to the fixed block 21, an operating table 23 is provided on the top of the screw 20, and the fixed block 21 A fixing bolt 30 corresponding to the screw rod 20 is provided on the operating table 23. The height of the operating table 23 can be adjusted by rotating the operating table 23. In order to ensure mechanical strength and stability, metal materials such as aluminum alloy are selected as much as possible; the operating table 23 is provided with a plastic table top. A layer of plastic is adhered to the surface of the metal operating table 23 to prevent short circuit during the battery dissection process. The thickness of the plastic layer is 3 to 5 mm; the gas supply system includes a gas cylinder 1 and an air compressor 9; the air inlet 19 is provided with a dual-channel air intake valve 31, and the two air intake valves 31 are respectively connected to the gas cylinder 1 and the air compressor 9, and can intake argon or compressed air separately; the exhaust pipe 8 is provided with an exhaust The processing chamber 11 is provided with a one-way air inlet pipe 10, and the smoke and toxic gas generated in the processing chamber 11 are removed by the exhaust fan 7. The one-way air inlet pipe 10 can maintain the pressure balance in the processing chamber 11; the transition chamber 17 is provided with an air inlet valve 31 and an air outlet valve 16 connected to the air compressor 9 and the exhaust gas collection pipeline 6 respectively. After the battery dissection is completed, the negative electrode sheet is transferred into the transition chamber 17, the air outlet valve 16 is opened first, and then the negative electrode sheet is preliminarily oxidized with dry air through the air inlet valve 31 to reduce its chemical reaction activity and avoid the subsequent water treatment reaction from being too intense. The air inlet flow rate above the transition chamber 17 is adjusted to 0.2~0.8L / min, after passing compressed air for 10-15min, the negative electrode plate is transferred into the processing chamber 11; the top of the processing chamber 11 is provided with an oxygen detector 3 and a lighting device 5, and the detection port of the detector is placed inside the dome. Since the inert gas generally used is argon, the density of argon is greater than the density of air. When the oxygen above the dome meets the standard, the oxygen index in the entire operation chamber 2 will be qualified; the lighting device 5 ensures a better visual environment; the upper part of the operation chamber 2 and the processing chamber 11 are both domes, the middle part is a cylinder, and the lower part is a cone. The operation chamber 2 is made of transparent, flame-retardant, and electrolyte corrosion-resistant materials. The wall thickness of the chamber is 5-10mm. Too thick wall thickness will lead to reduced transparency, and too thin wall thickness will lead to insufficient mechanical strength. The height of the dome is 0.8-1 times the radius of the middle cylinder. The lower the height of the dome, the greater the resistance encountered when removing the gas, which is easy to increase the mixing degree of the inert gas and air introduced, and reduce the efficiency of removing the air. .

[0022] Working process or working principle:

[0023] Open the entrance 24 of the operation chamber, the entrance is provided with an entrance cover on the outside, and an elastic body is provided on the edge of the entrance cover, which can ensure the sealing between the entrance cover and the chamber body, put the lithium-ion battery to be dissected and the dissecting tools into the operation chamber 2, close the entrance 24 cover of the operation chamber, place the battery on the operation table 23 through the operation port 12, adjust the appropriate height by rotating the operation table 23, and fix the operation table 23 by fixing bolts 30, open the gas exhaust valve and the air inlet 19 on the operation chamber 2 in turn, and continuously pass compressed air to the operation chamber 2 for 10 to 20 minutes through the air compressor 9 and the dryer, and use the compressed air to The air takes out the moisture in the operating box, closes the compressed air inlet valve 31 on the air inlet 19, and then opens the valve of the gas cylinder 1, adjusts the argon flow rate to 5-10L / min, observes the oxygen content value on the oxygen detector 3, and when the oxygen content is lower than 1%, performs a dissection evaluation on the battery. After the battery dissection evaluation is completed, open the transition bin entrance 27, put the negative electrode sheet into the transition bin 17, cover the transition bin entrance 27 cover, open the transition bin 17 outlet valve 16 and the inlet valve 31 in turn, adjust the intake gas flow meter flow rate to 0.2-0.8L / min, pass the compressed air for 10-15min, and during this period Close the valve of the gas cylinder 1 for a while, then open the compressed air inlet valve 31 of the air inlet 19, and directly pass the compressed air in a large flow to quickly replace the argon in the operating chamber 2. When the oxygen content reading of the oxygen detector 3 is greater than or equal to 20.5%, close the compressed air inlet valve 31 of the air inlet 19 and the air outlet 4 on the operating chamber 2. After the compressed air passing time of the transition chamber 17 meets the requirements, close the air inlet valve 31 and the air outlet valve 16 on the transition chamber 17 in turn, and then transfer the pre-treated negative electrode sheet in the transition chamber 17 to the processing chamber 11 through the operating port 12 of the processing chamber 11 through the processing chamber inlet 28, and The negative electrode sheets are dispersedly placed on the partition 22 covered with small holes, the outlet of the transition bin 17 is closed, the exhaust pipe 8 on the processing bin 11 and the discharge port on the cone bottom are opened in turn, the exhaust fan 7 and the sprinkler head are started for ventilation and watering treatment, and the smoke and toxic gases are discharged into the exhaust gas collection pipe 6 through the exhaust pipe 8, and the wastewater is discharged into the sewage discharge pipe 15. After the treatment is completed, the outlet 29 of the processing bin is opened, the negative electrode sheets that have completely lost their activity are taken out, and sent to the designated place for storage to complete the dissection, and finally the cover of the processing bin outlet 29 is closed, and the exhaust fan 7 continues to run for 20 to 30 minutes to drain the moisture in the processing bin 11.

[0024] The dome-shaped cone-bottom structure of the operation chamber 2 and the processing chamber 11 of the utility model has no dead angles, high gas replacement efficiency, and an inert gas environment to ensure the original surface state of the electrode. The electrode is not deformed or discolored. The chemical activity of the electrode is reduced through pretreatment in the transition chamber 17, and the intensity of the water spraying reaction is reduced to ensure safety. Smoke, toxic gas and wastewater are discharged in an organized manner, which is beneficial to environmental protection.

[0025] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of the present invention, but is only for the convenience of description.

Claims

1. A lithium-ion battery dissection experiment system, characterized in that: The invention comprises a sewage discharge pipeline (15), a waste gas collection pipeline (6), an air supply system and a fixed frame (13); the fixed frame (13) is provided with an operation chamber (2), a transition chamber (17) and a processing chamber (11) which are connected in sequence; the operation chamber (2) and the processing chamber (11) are both provided with an operation port (12); the operation chamber (2) is provided with an electrolyte discharge port (18) and an air outlet (4) connected to the waste gas collection pipeline (6); the processing chamber (11) is provided with a sewage discharge port (14) connected to the sewage discharge pipeline (15) and an exhaust pipe (8) connected to the waste gas collection pipeline (6); the operation chamber (2) is also provided with a processing component and an air inlet (19) connected to the air supply system; and the processing chamber (11) is provided with a spray component.

2. The lithium-ion battery dissection experiment system according to claim 1, characterized in that: The spray assembly comprises a water spray pipe (25) arranged on the top of the processing chamber (11), a water spray head (26) is arranged on the water spray pipe (25), and water spray holes are arranged on the front and side of the water spray head (26).

3. The lithium-ion battery dissection experiment system according to claim 1, characterized in that: The processing assembly comprises a fixed block (21) fixed in an operating chamber (2), a screw rod (20) being threadedly connected to the fixed block (21), an operating table (23) being arranged on the top of the screw rod (20), and a fixing bolt (30) corresponding to the screw rod (20) being arranged on the fixed block (21).

4. The lithium-ion battery dissection experiment system according to claim 3, characterized in that: The operating table (23) is provided with a plastic table top.

5. The lithium-ion battery dissection experiment system according to any one of claims 1 to 4, characterized in that: The gas supply system comprises a gas cylinder (1) and an air compressor (9).

6. The lithium-ion battery dissection experiment system according to claim 5, characterized in that: The air inlet (19) is provided with a dual-channel air inlet valve, and the two air inlet valves are respectively connected to the gas cylinder (1) and the air compressor (9).

7. The lithium-ion battery dissection experiment system according to claim 6, characterized in that: The exhaust pipe (8) is provided with an exhaust fan (7), and the processing chamber (11) is provided with a one-way air inlet pipe (10).

8. The lithium-ion battery dissection experiment system according to claim 7, characterized in that: The transition chamber (17) is provided with an air inlet valve (31) and an air outlet valve (16) which are respectively connected to the air compressor (9) and the exhaust gas collection pipeline (6).

9. The lithium-ion battery dissection experiment system according to claim 7 or 8, characterized in that: An oxygen detector (3) and lighting equipment (5) are provided on the top of the processing chamber (11).

10. The lithium-ion battery dissection experiment system according to claim 9, characterized in that: The upper parts of the operation chamber (2) and the processing chamber (11) are both dome-shaped, the middle parts are both cylindrical, and the lower parts are both conical.

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