Weakly acidic electrolyte preparation equipment of battery

Abstract

The present invention discloses a weak acid electrolyte preparation device of a battery, and relates to the field of battery electrolyte preparation, and the weak acid electrolyte preparation device comprises: a mixed liquid bottle as a main reaction chamber for electrolyte preparation; the stock solution bottle is connected to the top of the mixed solution bottle in a penetrating manner and is used for containing high-concentration acid solution; the flow adjusting assembly comprises a valve head, the valve head is arranged at the intersection of the mixed liquid bottle and the stock solution bottle, and the valve head can be adjusted in a lifting mode; the mixing and stirring assembly comprises a stirrer for stirring the mixed liquid bottle; according to the invention, the frustum-shaped valve head is used for converting high-concentration acid liquor into a uniform thin film flowing along the inner wall, so that the heat dissipation area is greatly increased, and local hot spots are eliminated; meanwhile, a spherical stirring head and a reverse inclined blade which are in reciprocating motion are matched to drive a bottom layer solution to roll upwards along the wall and generate violent reverse mass transfer exchange with a descending acid liquid film, so that deep dilution is completed.

Description

Technical Field

[0001] This invention relates to the field of battery electrolyte preparation, and more particularly to a device for preparing a weakly acidic electrolyte for batteries. Background Technology

[0002] In battery manufacturing, the pH value of the electrolyte is one of the key parameters affecting the battery's electrochemical performance, cycle life, and safety. Especially in the preparation of weakly acidic electrolyte systems, acid-base neutralization reactions or dilution processes of high-concentration acids are often involved. Although the thermal effect of weakly acidic systems is relatively milder than that of strong acidic systems, the reaction itself is still exothermic.

[0003] In actual production, if the acid solution is added too quickly or the mixing is uneven, it can easily generate intense localized exothermic reactions in the mixing area, leading to significant temperature gradients within the solution. Since pH measurement is essentially based on the electrode's response to hydrogen ion activity, and this response strictly follows the Nernst equation, it is highly temperature-sensitive. Localized instantaneous temperature rises not only cause pH meter readings to deviate from the true value, resulting in measurement errors, but temperature fluctuations can also cause feedback control failures, thus affecting the accurate proportioning of electrolyte components. Therefore, effectively suppressing localized temperature rises during preparation is a pressing technical problem in the field of electrolyte preparation. Summary of the Invention

[0004] The purpose of this invention is to provide a device for preparing a weakly acidic electrolyte for batteries, in order to solve the problem that the pH meter reading deviates from the true value due to local temperature rise during the preparation process.

[0005] To achieve the above objectives, the present invention employs the following technical solution: including, The mixing bottle serves as the main reaction chamber for electrolyte preparation. The stock solution bottle is connected to the top of the mixing solution bottle and is used to hold high-concentration acid solutions. A flow regulating component, the flow regulating component including a valve head, the valve head being disposed at the junction of the mixing bottle and the original liquid bottle, the valve head being adjustable in height; A mixing and stirring assembly, the mixing and stirring assembly including a stirrer for stirring a bottle of mixture; The flow rate of the stock solution in the stock solution bottle is regulated by raising and lowering the valve head, causing the stock solution to flow along the inner wall of the mixing bottle. The solution in the mixing bottle is stirred from bottom to top by a stirrer, causing the solution to roll and stir against the inner wall of the mixing bottle.

[0006] As a further description of the above technical solution: the mixing bottle includes a spherical bottom and a frustum-shaped body; The valve head has a frustum-shaped structure, and the taper of its outer circumference is precisely matched with the slope of the inner wall of the top of the bottle. An annular liquid gap is formed between the valve head and the inner wall of the bottle. The stirrer includes a spherical stirring head, which is fixed with an operating rod passing through a valve head and a stock solution bottle.

[0007] As a further description of the above technical solution: a hollow valve stem is connected to the top of the valve head, the operating rod passes through the valve stem, and an adjusting nut is rotatably connected to the top of the original liquid bottle. The adjusting nut is threadedly connected to the operating rod, thereby driving the valve head to perform precise lifting and lowering movements to change the size of the liquid gap.

[0008] As a further description of the above technical solution: the stirring head is fixedly connected by a frustoconical stirring body, and multiple annularly distributed stirring blades are fixedly installed on the stirring body.

[0009] As a further description of the above technical solution: the stirring blades are inclined, and the inclination directions of the plurality of stirring blades are opposite.

[0010] As a further description of the above technical solution: the original liquid bottle includes a spherical bottle, one side of which is connected to a second hopper, and the side of the bottle body away from the second hopper is connected to a first hopper.

[0011] As a further description of the above technical solution: the mixing bottle is fixed on the support frame; A mounting bracket is fixed to one side of the mixture bottle.

[0012] As a further description of the above technical solution: the support frame includes a lower flange and multiple legs, and the mounting frame includes a pipe clamp and a mounting plate fixed on the pipe clamp.

[0013] As a further description of the above technical solution: the operating rod is threadedly connected to a lock nut.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: This invention utilizes a frustoconical valve head to transform high-concentration acid solution into a uniform thin film flowing along the inner wall, greatly increasing the heat dissipation area and eliminating local hot spots. At the same time, in conjunction with a reciprocating spherical stirring head and counter-tilting blades, the bottom solution is driven to roll upward along the wall, undergoing a violent counter-current mass transfer exchange with the downward-flowing acid film, thereby achieving deep dilution. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the mixing bottle of the present invention; Figure 3This is a schematic diagram of the flow regulation component structure of the present invention; Figure 4 This is a schematic diagram of the mixing and stirring assembly structure of the present invention; Figure 5 This is a schematic diagram of the support frame structure of the present invention; Figure 6 This is a schematic diagram of the mounting frame structure of the present invention; Figure 7 This is a schematic diagram of the mixing and stirring state structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle.

[0016] Diagram caption: 10. Mixing liquid bottle; 11. Bottle bottom; 12. Bottle body; 13. Hopper 1; 14. Liquid seam; 15. Upper flange; 20. Stock solution bottle; 21. Spherical bottle; 22. Hopper II; 30. Flow regulating assembly; 31. Valve head; 32. Valve stem; 33. Adjusting nut; 34. Locking nut; 40. Mixing and stirring assembly; 41. Stirring device; 411. Stirring head; 412. Stirring body; 413. Stirring blades; 42. Operating lever; 421. Ear plate; 50. Support frame; 51. Lower flange; 52. Support leg; 60. Mounting bracket; 61. Pipe clamp; 62. Mounting plate. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figure 1 - Figure 8 As shown, the present invention provides a battery weakly acidic electrolyte preparation apparatus, comprising, Mixing solution bottle 10 serves as the main reaction chamber for electrolyte preparation; The stock solution bottle 20 is connected to the top of the mixing solution bottle 10 and is used to hold high-concentration acid solution; The flow regulating component 30 includes a valve head 31, which is located at the junction of the mixing bottle 10 and the original liquid bottle 20. The valve head 31 is adjustable in height. The mixing and stirring assembly 40 includes a stirrer 41 for stirring the mixture bottle 10; The flow rate of the stock solution in the stock solution bottle 20 is adjusted by the raising and lowering of the valve head 31, and the stock solution flows along the inner wall of the mixing bottle 10. The solution in the mixing bottle 10 is stirred from bottom to top by the stirrer 41, and the solution rolls and stirs against the inner wall of the mixing bottle 10.

[0019] The mixing bottle 10 includes a spherical bottle bottom 11 and a frustoconical bottle body 12, and a valve is provided at the bottom of the bottle bottom 11; The valve head 31 has a frustum-shaped structure, and the taper of its outer circumference is precisely matched with the slope of the inner wall of the top of the bottle body 12. When the valve head 31 is at different heights, an annular liquid slit 14 with an adjustable opening is formed between the valve head 31 and the inner wall of the bottle body 12. After the original liquid flows out through the liquid slit 14, it is no longer dripped directly to the center of the solution due to gravity and wall tension. Instead, it forms a uniform liquid film and flows downward along the direction F1 of the inner wall of the bottle body 12. This method greatly increases the contact area when the original liquid enters, disperses the heat dissipation point, and allows the heat to be quickly conducted and dissipated through the inner wall. The stirrer 41 includes a spherical stirring head 411, and the stirring head 411 is fixed with an operating rod 42 that passes through the valve head 31 and the original liquid bottle 20. When the spherical stirring head 411 moves downward, the solution in the bottom 11 of the bottle is squeezed by its spherical surface and rolls along its inner wall F2. The rolling liquid comes into contact with the liquid film on the inner wall of the bottle body 12 and mixes and stirs.

[0020] A hollow valve stem 32 is connected to the top of the valve head 31. The operating rod 42 passes through the valve stem 32. The top of the original liquid bottle 20 is rotatably connected to the adjusting nut 33 via a bearing. The adjusting nut 33 is threadedly connected to the upper half of the operating rod 42, which drives the valve head 31 to perform precise lifting and lowering movements, thereby changing the size of the liquid gap 14.

[0021] The stirring head 411 is fixedly connected to the frustum-shaped stirring body 412. Multiple ring-shaped stirring blades 413 are fixedly installed on the stirring body 412. The stirring blades 413 are inclined, and the inclination directions of the multiple stirring blades 413 are opposite. The stirring blades 413 adopt an inclined design, and the inclination directions of different groups of blades are opposite. When the stirring blades 413 move up and down, they generate an upward thrust, which pulls the solution at the bottom 11 of the spherical bottle upward and generates a strong turbulent shear force, forcing the rising solution to roll upward along the inner wall of the frustum-shaped bottle body 12. The upwardly rolled mixture and the film of the original solution flowing down along the inner wall undergo efficient reverse mass transfer exchange at the bottle wall, ensuring that the acidic component is fully diluted and homogenized as soon as it enters the system, and completely eliminating the "acid clumps" or "hot spots" that may appear around the pH meter probe.

[0022] The stock solution bottle 20 includes a spherical bottle 21, with a hopper 22 connected through one side of the bottle 21 for adding the stock solution, and a hopper 13 connected through the side of the bottle body 12 away from the hopper 22 for adding the base solvent or auxiliary additives.

[0023] The mixing bottle 10 is fixed to the support frame 50; A mounting bracket 60 is fixed to one side of the mixing bottle 10. The support frame 50 includes a lower flange 51 and multiple legs 52. An upper flange 15 is fixedly installed on the bottle body 11. The upper flange 15 and the lower flange 51 are fixed with nuts. The mounting bracket 60 includes a pipe clamp 61 and a mounting plate 62 fixed on the pipe clamp 61. An ear plate 421 is fixedly installed on the top of the operating rod 42. An electric telescopic rod is fixedly installed on the mounting plate 62. The piston rod of the electric telescopic rod is connected to the operating rod 42 through bolts and nuts in the ear plate 421. The piston rod is arranged parallel to the operating rod 42 so as to drive the operating rod 42 and the stirring head 411 to rise and fall through the electric telescopic rod.

[0024] The operating lever 42 is threadedly connected to the locking nut 34, which is positioned above the adjusting nut 33. The locking nut 34 provides physical positioning to prevent the operating lever 42 from shifting due to vibration during long-term operation.

[0025] Working principle: In the initial stage of preparation, the base solvent enters the mixing bottle 10 through hopper 13. Subsequently, the stock solution bottle 20 located above is loaded with high-concentration acid solution through hopper 22. The operator rotates the adjusting nut 33 on the top of the stock solution bottle 20, which drives the hollow valve stem 32 and the frustum-shaped valve head 31 at its bottom to perform precise lifting and lowering movements through the threaded transmission.

[0026] Because the taper of the valve head 31 is precisely matched with the slope of the top of the bottle body 12, an adjustable annular liquid slit 14 is formed between them. The concentrate flows out through this slit 14 under gravity, driven by wall tension, and no longer falls directly into the center of the solution in the traditional "droplet" form. Instead, it forms an extremely uniform liquid film that flows downwards along the inner wall direction F1. This "film-forming along the wall" design greatly increases the contact area when the acid enters the system, allowing the heat generated during dilution to be quickly conducted away through the bottle wall of the mixing bottle 10, thus dispersing the heat release point at its source.

[0027] As the original liquid flows downwards, the mixing and stirring assembly 40 is activated. The electric telescopic rod drives the operating rod 42 and the spherical stirring head 411 at its end to reciprocate up and down via the lug 421. When the spherical stirring head 411 moves downwards to the bottom 11 of the spherical bottle, the spherical surface and the curvature of the bottle bottom generate a strong fluid compression effect. The bottom solution is forced to roll upwards along the inner wall of the spherical shape in the direction F2, forming a bottom-up power source. The multiple sets of counter-tilted stirring blades 413 on the stirring body 412 generate a strong upward thrust and turbulent shear force as they move with the operating rod 42. This not only pulls the bottom components upwards but also breaks the laminar flow state of the liquid, ensuring deep circulation of the solution in the vertical direction.

[0028] It is worth noting that the mixing bottle 10, the original liquid bottle 20, the flow regulating component 30, and the mixing and stirring component 40 in this invention are all made of acid-resistant materials.

[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for preparing a weakly acidic electrolyte for a battery, characterized in that: include, Mixing solution bottle (10) serves as the main reaction chamber for electrolyte preparation; The original solution bottle (20) is connected to the top of the mixed solution bottle (10) and is used to hold high-concentration acid solution; A flow regulating component (30) includes a valve head (31) which is located at the junction of the mixing bottle (10) and the original liquid bottle (20). The valve head (31) is adjustable in height. A mixing and stirring assembly (40) includes a stirrer (41) for stirring the mixture bottle (10). The original liquid in the original liquid bottle (20) is adjusted by raising and lowering the valve head (31) to make the original liquid flow along the inner wall of the mixing bottle (10). The solution in the mixing bottle (10) is stirred from bottom to top by the stirrer (41) and the solution is rolled and stirred against the inner wall of the mixing bottle (10).

2. The apparatus for preparing a weakly acidic electrolyte for a battery according to claim 1, characterized in that, The mixing bottle (10) includes a spherical bottom (11) and a frustum-shaped body (12). The valve head (31) is a frustum-shaped structure, and the taper of its outer circumference is precisely matched with the slope of the inner wall of the top of the bottle body (12). An annular liquid gap (14) is formed between the valve head (31) and the inner wall of the bottle body (12). The stirrer (41) includes a spherical stirring head (411) with an operating rod (42) fixed therethrough through the valve head (31) and the original liquid bottle (20).

3. The apparatus for preparing a weakly acidic electrolyte for a battery according to claim 2, characterized in that, The valve head (31) is connected to a hollow valve stem (32) at the top. The operating rod (42) passes through the valve stem (32). The top of the original liquid bottle (20) is rotatably connected to an adjusting nut (33). The adjusting nut (33) is threadedly connected to the operating rod (42), which drives the valve head (31) to perform precise lifting and lowering movements, changing the size of the liquid gap (14).

4. The apparatus for preparing a weakly acidic electrolyte for a battery according to claim 2, characterized in that, The stirring head (411) is fixedly connected by a frustoconical stirring body (412), on which a plurality of annularly distributed stirring blades (413) are fixedly installed.

5. The apparatus for preparing a weakly acidic electrolyte for a battery according to claim 4, characterized in that, The stirring blades (413) are inclined, and the inclination directions of the plurality of stirring blades (413) are opposite.

6. The apparatus for preparing a weakly acidic electrolyte for a battery according to claim 2, characterized in that, The original liquid bottle (20) includes a spherical bottle (21), one side of which is connected to a second hopper (22), and the side of the bottle body (12) facing away from the second hopper (22) is connected to a first hopper (13).

7. The apparatus for preparing a weakly acidic electrolyte for a battery according to claim 1, characterized in that, The mixing bottle (10) is fixed on the support frame (50); A mounting bracket (60) is fixed to one side of the mixing bottle (10).

8. The apparatus for preparing a weakly acidic electrolyte for a battery according to claim 7, characterized in that, The support frame (50) includes a lower flange (51) and multiple legs (52), and the mounting frame (60) includes a pipe clamp (61) and a mounting plate (62) fixed on the pipe clamp (61).

9. The apparatus for preparing a weakly acidic electrolyte for a battery according to claim 2, characterized in that, The operating lever (42) is threadedly connected to the locking nut (34).

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