Tool for testing electrochemical and thermal stability of organic expanding agent
By designing a test tool including a rectangular plastic trough and a positive and negative electrode plate with electrode ears, the electrochemical oxidation method is used to quickly evaluate the electrochemical and thermal stability of the organic expansion agent, the problem of difficulty in quickly and effectively evaluating the stability of the organic expansion agent in the prior art is solved, and efficient and accurate test results are achieved.
Patent Information
- Application Number
- CN202421275219.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-06-05
AI Technical Summary
The prior art is difficult to quickly and effectively evaluate the electrochemical and thermal stability of organic expansion agents, which affects the performance and life of lead-acid batteries.
A test tool including rectangular plastic tank, independent positive lead plate oxidation and negative lead plate oxidation and negative lead plate oxidation, positive electrode plate and negative electrode plate with electrode ears, knob copper plugs and copper wires was designed to quickly evaluate the stability of the organic expansion agent through electrochemical oxidation.
The rapid evaluation of the electrochemical stability of organic expansion agents is achieved, testing errors are reduced, and the tooling can be reused, suitable for multiple tests.
Smart Images
Figure CN223051177U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of lead-acid batteries, and particularly relates to a tool for testing the electrochemical and thermal stability of an organic expanding agent. Background Art
[0002] The rapid development of new energy vehicles has made the usage environment of lead-acid batteries more and more complex, posing higher requirements for the stability of auxiliary materials in the negative electrode, especially organic expanding agents. Common expanding agents in lead-acid batteries include lignin and humic acid. If the organic expanding agent decomposes and fails, the capacity, low-temperature discharge, and lifespan of the battery will be greatly affected. Usually, the battery performance is verified by evaluating the organic expanding agent, but it takes a long time. The electrochemical and thermal stability can be quickly evaluated by means of electrochemical oxidation. Summary of the Invention
[0003] In order to evaluate the electrochemical and thermal stability of an organic expanding agent and be able to be reused, the utility model provides a tool for testing the electrochemical and thermal stability of an organic expanding agent.
[0004] The technical solution of the utility model is: a tool for testing the electrochemical and thermal stability of an organic expanding agent, characterized in that: it includes a rectangular plastic tank; both sides of the plastic tank are separated into two independent positive lead plate oxidation sub-tanks and negative lead plate oxidation sub-tanks by plastic plates; the positive lead plate oxidation sub-tank and the negative lead plate oxidation sub-tank are respectively filled with a positive electrode plate with a tab and a negative electrode plate with a tab; positive through holes and negative through holes are opened on the plastic tank wall above the positive lead plate oxidation sub-tank and the negative lead plate oxidation sub-tank corresponding to the positive electrode plate and the negative electrode plate respectively. A positive electrode knob copper bolt is installed in the positive through hole, and a negative electrode knob copper bolt is installed in the negative through hole. The positive electrode knob copper bolt and the negative electrode knob copper bolt are respectively connected to the positive electrode plate and the negative electrode plate through copper wires.
[0005] In the technical solution of the utility model, a liquid level line is provided on the plastic tank wall corresponding to the middle of the welding point of the tabs of the positive electrode plate and the negative electrode plate and the upper edge of the lead plate.
[0006] In the technical solution of the utility model, the upper edges of the tabs of the positive electrode plate and the negative electrode plate are respectively lower than the positive electrode knob copper bolt and the negative electrode knob copper bolt; the upper edge of the plastic plate is lower than the upper edge of the plastic tank wall.
[0007] In the technical solution of the utility model, the plastic tank is a white or transparent plastic tank; the plastic plate is a white plastic plate.
[0008] In the technical solution of the utility model, the material of the plastic tank is PP or PC; the material of the plastic plate is PP or PC.
[0009] In the technical solution of the present utility model, the bottom surface of the plastic tank is rectangular, the long side is 1.2 to 1.5 times the width side, and the long side is 1.2 to 1.5 times the height of the tank wall.
[0010] In the technical solution of the present utility model, the long side of the bottom surface of the plastic tank is 25 to 35 cm.
[0011] In the technical solution of the present utility model, the distance between the plastic plate and the opposite side wall of the plastic tank is 1 / 5 of the long side of the bottom surface of the plastic tank, and it is fixed on the adjacent side wall of the plastic tank by means of glue sealing or other methods.
[0012] In the technical solution of the present utility model, the plastic plate is a white plastic plate, the height and width are respectively the same as the internal height and width of the plastic tank, and the thickness is 2 to 5 mm; the middle of the plastic plate is a hollow structure, and the hollow area is 60 to 80% of the total area of the white plastic plate.
[0013] In the technical solution of the present utility model, the positive plate and the negative plate have the same structure, the thickness is 0.9 to 1.5 mm, the height of the tab is 15 to 20 mm, the upper edge of the tab is 1 mm lower than the positive electrode knob copper bolt and the negative electrode knob copper bolt, and the upper edge of the plastic plate is 3 to 8 mm lower than the upper edge of the side wall of the plastic tank; the positive electrode knob copper bolt and the negative electrode knob copper bolt are respectively connected to one end of the copper wire by means of copper wire winding or welding, and the other end of the copper wire is respectively welded to the center of the tab of the positive plate and the negative plate.
[0014] The beneficial effects of the present utility model: It can electrochemically oxidize the organic swelling agent, better evaluate the electrochemical stability, reduce the experimental error caused by different people's tests, and can be used repeatedly for many times.
[0015] The present utility model has the characteristics of simple structure, convenient operation and being able to be used repeatedly, and is mainly used to evaluate the electrochemical and thermal stability of the organic swelling agent. Description of the Drawings
[0016] Figure 1 It is a schematic structural diagram of the present utility model.
[0017] Figure 2 It is a top view of the present utility model.
[0018] In the figure: 1 - plastic tank; 2 - plastic plate; 3 - positive lead plate; 4 - negative lead plate; 5 - positive electrode knob copper bolt; 6 - negative electrode knob copper bolt; 7 - copper wire; 8 - liquid level line. Detailed Embodiments
[0019] The following further describes the present utility model with reference to the drawings.
[0020] As Figure 1 、 Figure 2As shown, an embodiment of a tool for testing the electrochemical and thermal stability of an organic expander, which is composed of a plastic tank 1, a plastic plate 2, a positive plate 3, a negative plate 4, a positive electrode knob copper bolt 5, a negative electrode knob copper bolt 6, a copper wire 7 and a liquid level line 8, is mainly used to evaluate the electrochemical and thermal stability of the organic expander.
[0021] The plastic tank 1 is rectangular in shape, a white or transparent plastic tank, prepared from materials such as PP and PC. The long side of the bottom surface of the plastic tank 1 is 25 - 35 cm. The long side of the bottom surface of the plastic tank 1 is 1.2 - 1.5 times the width side, and the long side is 1.2 - 1.5 times the height of the tank wall. The plastic tank 1 can directly borrow the battery tank.
[0022] The two sides of the plastic tank 1 are respectively partitioned into two independent positive lead plate oxidation sub - tanks and negative lead plate oxidation sub - tanks by the plastic plate 2. The plastic plate 2 is fixed on the adjacent plastic tank 1 tank wall and bottom by glue sealing or other means. The plastic plate 2 is a white plastic plate, rectangular in shape, made of PP or PC, with the height and width respectively the same as the internal height and width of the plastic tank 1, and the thickness is 2 - 5 mm. The middle of the plastic plate 2 is a hollow structure, and the hollow area is 60 - 80% of the total area of the white plastic plate. The distance between the plastic plate 2 and the opposite side wall of the plastic tank 1 is 1 / 5 of the long side of the bottom surface of the plastic tank 1. The upper edge of the plastic plate 2 is 3 - 8 mm lower than the upper edge of the side wall of the plastic tank 1. Positive through - holes and negative through - holes are respectively opened on the upper parts of the corresponding same - side tank walls of the positive lead plate oxidation sub - tank and the negative lead plate oxidation sub - tank.
[0023] The positive plate 3 and the negative plate 4 have the same structure. The lead plate areas and shapes of the two are exactly the same. The lead strip used in production can be borrowed, with a thickness of 0.9 - 1.5 mm, cut into a grid shape with lugs, and the lug height is 15 - 20 mm. The positive plate 3 and the negative plate 4 are respectively installed in the positive lead plate oxidation sub - tank and the negative lead plate oxidation sub - tank. A liquid level line 8 is provided on the tank wall of the plastic tank 1 corresponding to the middle of the welding point of the lugs and the upper edge of the lead plate of the positive plate 3 and the negative plate 4. When in use, the liquid is injected to this liquid level line 8. The positive electrode knob copper bolt 5 is installed on the positive through - hole, and the negative electrode knob copper bolt 6 is installed on the negative through - hole. The upper edges of the lugs of the positive plate 3 and the negative plate 4 are respectively 1 mm lower than the positive electrode knob copper bolt 5 and the negative electrode knob copper bolt 6. The positive electrode knob copper bolt 5 and the negative electrode knob copper bolt 6 are respectively connected to one end of the copper wire 7 by means of copper wire winding or welding, and the other end of the copper wire 7 is respectively welded to the center of the lugs of the positive plate 3 and the negative plate 4.
[0024] The utility model adopts a tooling for testing the electrochemical and thermal stability of organic blowing agents, which is composed of a white or transparent plastic tank 1, a white plastic plate 2, a positive lead plate 3, a negative lead plate 4, a positive electrode knob copper bolt 5, a negative electrode knob copper bolt 6, a copper wire 7 and a liquid level line 8. When testing, the following steps are carried out: 1. Pretreatment: Inject sulfuric acid aqueous solution with a density of 1.1 g / mL to the liquid level line 8, connect the positive electrode knob copper bolt 5 and the negative electrode knob copper bolt 6 to the external circuit respectively, and charge with a current of 0.2 A / cm² of the lead plate area for 24 h; 2. Pour out the sulfuric acid solution, inject sulfuric acid solution containing organic blowing agent with a certain concentration to the liquid level line 8, the density of the sulfuric acid aqueous solution is 1.05 g / mL, and the organic blowing agent can be adjusted according to the concentration used in the battery, and let it stand for 0.5 h; 3. Connect the positive electrode knob copper bolt 5 and the negative electrode knob copper bolt 6 to the external circuit, and carry out electrochemical oxidation in a constant current or constant voltage manner, and the constant current or constant voltage and the charging time are adjusted according to the actual situation; 4. Observe the change of the liquid level during the charging process. If the liquid level drops significantly, deionized water can be added; 5. After the charging is completed, supplement the liquid level to the liquid level line 8, take a part of the solution for ultraviolet test, and calculate the amount of electrochemical decomposition by comparing with the original concentration. In addition, the whole tank can also be placed in different ambient temperatures to test the influence of temperature on its decomposition.
Claims
1. A tool for testing the electrochemical and thermal stability of an organic expander, characterized by: The invention comprises a rectangular plastic groove (1); the two sides of the plastic groove (1) are separated into two independent positive lead plate oxidation sub-grooves and negative lead plate oxidation sub-grooves by plastic plates (2); the positive lead plate oxidation sub-grooves and the negative lead plate oxidation sub-grooves are respectively provided with a positive electrode plate (3) with a pole ear and a negative electrode plate (4) with a pole ear; the positive lead plate oxidation sub-grooves and the negative lead plate oxidation sub-grooves correspond to the positive electrode plate (3) and the negative electrode plate (4) respectively, and a positive electrode through hole and a negative electrode through hole are respectively opened on the groove wall of the plastic groove (1) above the positive electrode plate (3) and the negative electrode plate (4); the positive electrode through hole is provided with a positive electrode knob copper bolt (5), and the negative electrode through hole is provided with a negative electrode knob copper bolt (6); the positive electrode knob copper bolt (5) and the negative electrode knob copper bolt (6) are respectively connected to the positive electrode plate (3) and the negative electrode plate (4) through copper wires (7).
2. A tool for testing the electrochemical and thermal stability of an organic expander according to claim 1, characterized in that: A liquid level line (8) is provided on the wall of the plastic groove (1) corresponding to the middle of the upper edge of the lead plate and the electrode ear welding point of the positive electrode plate (3) and the negative electrode plate (4).
3. A tool for testing the electrochemical and thermal stability of an organic expander according to claim 2, characterized in that: The upper edges of the tabs of the positive plate (3) and the negative plate (4) are respectively lower than the positive electrode knob copper bolt (5) and the negative electrode knob copper bolt (6); the upper edge of the plastic plate (2) is lower than the upper edge of the wall of the plastic groove (1).
4. A tool for testing the electrochemical and thermal stability of an organic expander according to any one of claims 1 to 3, characterized in that: The plastic trough (1) is a white or transparent plastic trough; the plastic plate (2) is a white plastic plate.
5. A tool for testing the electrochemical and thermal stability of an organic expander according to claim 4, characterized in that: The material of the plastic trough (1) is PP or PC; the material of the plastic plate (2) is PP or PC.
6. A tool for testing the electrochemical and thermal stability of an organic expander according to any one of claims 1-3 and 5, characterized in that: The bottom surface of the plastic trough (1) is rectangular, the long side is 1.2 to 1.5 times the wide side, and the long side is 1.2 to 1.5 times the height of the trough wall.
7. A tool for testing the electrochemical and thermal stability of an organic expander according to claim 6, characterized in that: The long side of the bottom surface of the plastic trough (1) is 25 to 35 cm.
8. The tool for testing the electrochemical and thermal stability of an organic expander according to claim 6, characterized in that: The distance between the plastic plate (2) and the side wall of the plastic groove (1) opposite thereto is 1 / 5 of the long side of the bottom surface of the plastic groove (1).
9. A tool for testing the electrochemical and thermal stability of an organic expander according to any one of claims 1-3, 5, 7-8, characterized in that: The plastic plate (2) is a white plastic plate, the height and width of which are respectively consistent with the inner height and width of the plastic trough (1), and the thickness is 2 to 5 mm; the middle of the plastic plate (2) is a hollow structure, and the hollow area is 60 to 80% of the total area of the white plastic plate.
10. A tool for testing the electrochemical and thermal stability of an organic expander according to any one of claims 1-3, 5, 7-8, characterized in that: The positive electrode plate (3) and the negative electrode plate (4) have the same structure, a thickness of 0.9-1.5 mm, a tab height of 15-20 mm, an upper edge of the tab lower than the positive electrode knob copper bolt (5) and the negative electrode knob copper bolt (6) by 1 mm, and an upper edge of the plastic plate (2) lower than the upper edge of the side wall of the plastic groove (1) by 3-8 mm; the positive electrode knob copper bolt (5) and the negative electrode knob copper bolt (6) are connected to one end of a copper wire (7) by copper wire winding or welding, and the other end of the copper wire (7) is welded to the center of the tab of the positive electrode plate (3) and the negative electrode plate (4) respectively.