Electrolyte centrifugal tool and centrifugal equipment

Abstract

The utility model provides an electrolyte centrifugal tool and centrifugal equipment, and the electrolyte centrifugal tool comprises a shell which is provided with a cavity, and a separator is arranged in the cavity and is used for separating the cavity into a first storage section and a second storage section which are communicated with each other; and the sealing cover is detachably connected to the opening part of the first storage section. Therefore, the cavity is separated by the separator, so that the second storage section can store the electrolyte, and the electrolyte is prevented from being sucked back.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrolyte technical field especially relates to a kind of electrolyte centrifugal tool and centrifugal equipment. BACKGROUND

[0002] In the production process of battery, due to the long time of battery opening, the possibility of water absorption exists in the battery exposed to air, and the moisture will react with the lithium salt and other components in the electrolyte, to produce hydrogen fluoride, so that hydrogen fluoride reacts with the shell wall of battery, causing iron, nickel and other elements in the battery shell to dissolve, resulting in blackening of battery shell wall, OCV drops too fast, long cycle diving and other problems, therefore, it is necessary to carry out sampling inspection on the electrolyte composition in the battery during the production and experimental process of battery, however, in the operation of extracting electrolyte by centrifuge to broken battery in the related art, the electrolyte centrifuged is sucked back into the battery core, resulting in less electrolyte produced by centrifugation and low sampling efficiency. SUMMARY

[0003] Therefore, the utility model provides a kind of electrolyte centrifugal tool and centrifugal equipment to prevent electrolyte from being sucked back into battery core, to at least partially solve the problems in the related art.

[0004] To achieve the above purpose, the utility model provides a kind of electrolyte centrifugal tool, including:

[0005] Shell, with chamber, and the chamber is provided with partition, to separate the chamber into first receiving section and second receiving section that are interconnected;

[0006] Sealing cover, the sealing cover is detachably connected to the opening part of the first receiving section.

[0007] Optionally, the sealing cover has an embedded groove for receiving part of the battery, when the sealing cover is connected to the shell, the embedded groove is engaged with the first receiving section to form a fixing cavity for clamping and fixing the battery.

[0008] Optionally, the connecting part of the shell and the sealing cover is provided with a sealing ring.

[0009] Optionally, the partition includes a partition plate, which is connected to the inner wall of the chamber, and the partition plate is provided with a through hole for electrolyte circulation.

[0010] Optionally, it further includes a protective cup body, which is inserted into the centrifuge turntable, and the protective cup body has a receiving cavity for carrying the shell.

[0011] Optionally, a fastener is further included, the fastener is movably connected to the protective cup body, and the fastener includes a driving end and an abutting end, the fastener has a first state and a second state, when the fastener is in the first state, the abutting end abuts against the shell, when the fastener is in the second state, the abutting end has a disengaging gap from the shell, and the driving end is used to drive the fastener to switch between the first state and the second state.

[0012] Optionally, the fastener includes a screw, and a threaded hole for threadedly connecting the screw is arranged on the protective cup body, and an axis direction of the threaded hole is perpendicular to an axis direction of the protective cup body.

[0013] Optionally, a plurality of fasteners are arranged along a circumference of the protective cup body.

[0014] Optionally, rubber gaskets are arranged on bottom surfaces of the embedding grooves and an upper surface of the partition piece.

[0015] Based on the same inventive concept, the utility model further provides a centrifugal equipment, including electrolyte centrifugal frock as any above described.

[0016] Through the above technical scheme, the partition piece can divide the cavity of the shell into the first storage section and the second storage section which are in communication with each other, the first storage section is used for placing the battery with the broken opening, and the second storage section is used for storing the centrifuged electrolyte, the battery and the centrifuged electrolyte can be separated by the partition piece, the back suction of the electrolyte by the roll core structure is avoided, the extraction amount of the electrolyte is improved, and therefore the sampling efficiency is improved, meanwhile, the sealing cover is detachably connected to the opening part of the first storage section, so that the cavity has a certain airtightness, the battery is prevented from flying out of the centrifuge turntable and the electrolyte is prevented from overflowing out of the cavity and polluting the centrifuge during the centrifugation.

[0017] Other features and advantages of the present disclosure will be described in detail in the following detailed description section. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the present utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

[0019] Figure 1 It is a structural schematic view of the shell and the sealing cover provided in the exemplary embodiment of the present disclosure and the shell stores the battery;

[0020] Figure 2is a structural schematic view of a shell and a sealing cover provided in the exemplary embodiment of the present disclosure;

[0021] Figure 3 is a structural schematic view of a shell mounted in a protective cup body provided in the exemplary embodiment of the present disclosure;

[0022] Figure 4 is a structural schematic view of a centrifuge turntable provided in the exemplary embodiment of the present disclosure;

[0023] Figure 5 is a structural schematic view of a baffle provided in the exemplary embodiment of the present disclosure.

[0024] Explanation of Reference Signs

[0025] 1 - shell; 101 - first receiving section; 102 - second receiving section; 2 - sealing cover; 201 - embedding groove; 3 - partition plate; 301 - through hole; 4 - centrifuge turntable; 5 - protective cup body; 501 - receiving cavity; 6 - baffle; 601 - liquid discharge hole; 7 - battery; 8 - fastener. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the embodiments and the accompanying drawings.

[0027] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be understood as the common meanings understood by those skilled in the art to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the words cover the elements or objects listed after the words and their equivalents, without excluding other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0028] In the production process of batteries, especially in the manufacturing of lithium batteries, the open time of the battery cell is a key control point. If the battery is left open for too long, the battery cell will be exposed to air, and moisture in the air may penetrate into the battery. This moisture will react with components such as lithium salts (such as lithium hexafluorophosphate, LiPF6) in the battery electrolyte, generating hydrogen fluoride (HF) gas. As a strong corrosive substance, hydrogen fluoride will react with the battery shell (usually made of metal materials such as iron, nickel, etc.), causing the dissolution of metal elements such as iron and nickel in the battery shell, which not only weakens the structural integrity of the battery, but also can cause a series of problems, including but not limited to blackening of the battery shell wall, internal corrosion, and deterioration of electrical performance.

[0029] Specifically, when the battery is exposed to air, moisture enters the battery cell and reacts with lithium salts in the electrolyte to generate hydrogen fluoride, which then reacts with the metal of the shell wall, causing the shell wall to be corroded. This directly affects the electrochemical performance of the battery, causing the open-circuit voltage (OCV) to drop rapidly, and in long-term cycling use, the battery capacity decays (dive) phenomenon. In addition, as the moisture accumulates in the battery and the electrolyte deteriorates, the life and safety of the battery are also threatened. Therefore, in order to ensure the production quality and service life of the battery, it is necessary to regularly inspect the electrolyte composition inside the battery cell during production and experiments.

[0030] However, in the related art, in order to extract the electrolyte inside the battery cell for analysis, a centrifugal method is usually used, that is, a centrifuge is used to centrifuge the broken battery to separate the electrolyte from the battery cell. However, during the centrifugation process, the roll core structure in the battery cell has a back suction phenomenon, causing some of the centrifuged electrolyte to be sucked back into the battery cell. This back suction phenomenon directly leads to a small amount of electrolyte extracted by centrifugation, which cannot meet the experimental requirements, thereby greatly reducing the sampling efficiency.

[0031] In addition, due to the low sampling efficiency, the true detection results of the electrolyte composition may also be affected, that is, due to the small amount of sample, the concentration change of some electrolyte components may not be effectively detected. Therefore, how to effectively increase the amount of electrolyte extracted by centrifugation and avoid the problem of electrolyte back suction into the battery cell is an important problem to be solved at present.

[0032] Therefore, in the specific embodiments of the present application, an electrolyte centrifugal tool is provided, which is used to extract the electrolyte from the battery cell by centrifugation. Figures 1 to 5As shown, the electrolyte centrifugal tool includes a shell 1 and a sealing cover 2, wherein the shell 1 has a cavity for placing the punctured battery 7, and a partition is arranged in the cavity to divide the cavity into a first receiving section 101 and a second receiving section 102 in communication with each other, that is, the first receiving section 101 is used to receive the punctured battery 7, and the second receiving section 102 is used to store the centrifuged electrolyte. The partition separates the battery 7 from the centrifuged electrolyte, effectively preventing the electrolyte from being sucked back into the battery, thereby improving the extraction amount of the electrolyte, and improving the sampling efficiency and detection accuracy, and ensuring the reliability of the electrolyte composition analysis.

[0033] Meanwhile, the sealing cover 2 is detachably connected to the opening part of the first receiving section 101, and the cavity can be sealed by the sealing cover 2 to make the cavity airtight, preventing the punctured battery 7 from flying out of the centrifuge disc 4 under the action of centrifugal force in the high-speed rotating centrifuge during the centrifugation process, ensuring the safety of the operation and the stability of the equipment. In addition, the sealing cover 2 can also prevent the electrolyte from overflowing during centrifugation, that is, the strong centrifugal force generated by centrifugation may cause the electrolyte to be "thrown" out of the cavity, resulting in loss of electrolyte and contamination of the centrifuge.

[0034] In some embodiments, a sealing ring is arranged at the connection part of the shell 1 and the sealing cover 2, that is, a sealing ring is arranged at the connection part of the shell 1 and the sealing cover 2, which effectively improves the sealing performance of the electrolyte centrifugal tool, ensures that the cavity remains completely airtight during centrifugation, prevents external air, moisture or other impurities from entering, and prevents electrolyte from overflowing. At the same time, the sealing ring can also buffer the physical contact between the sealing cover 2 and the shell 1, reduce wear and tear, and prolong the service life of the electrolyte centrifugal tool.

[0035] In some embodiments, the sealing ring is usually made of a material with good elasticity and chemical corrosion resistance, such as silicone or fluororubber. When the sealing cover 2 is closed on the shell 1, the sealing ring is compressed and fills the small gap that may exist between the shell 1 and the sealing cover 2, ensuring that the connection can achieve the desired air and liquid tightness.

[0036] In some embodiments, as shown in Figure 1 and Figure 2 The sealing cover 2 has an embedding groove 201 for receiving part of the battery 7, and when the sealing cover 2 is connected to the shell 1, the embedding groove 201 is engaged with the first receiving section 101 to form a fixing cavity for clamping and fixing the battery 7, that is, by arranging the embedding groove 201 on the sealing cover 2, the sealing cover 2 and the shell 1 are engaged to form a fixing cavity, thereby effectively clamping and fixing the punctured battery 7, preventing the punctured battery 7 from moving or shaking due to the action of centrifugal force during centrifugation, and enhancing the stability during centrifugation.

[0037] In some embodiments, rubber gaskets are installed on the bottom surface of the embedding groove 201 and the upper surface of the partition, that is, the installation of the rubber gasket can effectively absorb vibration and impact during the centrifugation process, prevent the battery 7 from shifting or loosening due to vibration, and ensure the smoothness and stability of the centrifugation process. At the same time, the high friction coefficient of the rubber gasket can increase the friction between the shell 1 and the embedding groove 201 or the partition, further enhancing the fixing effect of the battery 7 and preventing position displacement due to sliding.

[0038] refer to Figure 1 When the sealing cover 2 is connected to the shell 1, the broken part of the battery 7 abuts against the upper surface of the separator, and the pole and the surrounding part of the pole of the battery 7 abut against the bottom surface of the embedded groove 201. The broken battery 7 is relatively clamped and fixed by the sealing cover 2 and the separator.

[0039] In some embodiments, the sealing cover 2 and the shell 1 can be connected by a threaded connection, that is, an external thread is provided on the outer wall surface of the upper end of the shell 1, and an internal thread compatible with the external thread is provided on the side wall surface of the embedding groove 201 of the sealing cover 2, and the sealing ring is fitted on the bottom surface of the embedding groove 201.

[0040] In another embodiment, the sealing cover 2 and the housing 1 may be fixed by bolts, that is, the sealing cover 2 is provided with a through hole 301 for the bolts to pass through, and the end of the housing 1 is provided with a threaded hole.

[0041] In some embodiments, the shape design of the first receiving section 101 and the embedding groove 201 can be adjusted according to the shape and size of different batteries 7, so that the electrolyte centrifuge tooling has better applicability, making it suitable for centrifugal operations of batteries 7 of different models and sizes.

[0042] In some embodiments, reference Figure 1 and Figure 2 As shown, the separator includes a partition plate 3, which is connected to the inner wall of the chamber. The partition plate 3 is provided with a through hole 301 for the circulation of electrolyte, that is, it can be understood that the partition plate 3 is constructed as a circular plate, and the chamber is divided into two areas by the partition plate 3, which effectively realizes the spatial separation of the battery 7 and the electrolyte, effectively prevents the electrolyte from being sucked back into the battery cell, thereby increasing the extraction amount of the electrolyte, and the through hole 301 on the partition plate 3 allows the electrolyte to flow smoothly to the second receiving section 102 during the centrifugation process.

[0043] In some embodiments, reference Figure 5As shown, the partition further comprises a baffle 6, wherein the baffle 6 is arranged on the upper surface of the partition plate 3, and a plurality of liquid discharge holes 601 are arranged on the baffle 6, so that the electrolyte can flow smoothly to the second receiving section 102, and the liquid discharge holes 601 are funnel-shaped, which can prevent the electrolyte from splashing out of the second receiving section 102 due to violent vibration during centrifugation, effectively isolating the electrolyte and ensuring the integrity of the sample.

[0044] In some embodiments, the shell 1 and the sealing cover 2 are made of polytetrafluoroethylene, i.e., the polytetrafluoroethylene (PTFE) material has excellent chemical corrosion resistance and can effectively resist the corrosion of corrosive substances such as hydrogen fluoride in the electrolyte, prolonging the service life of the shell 1 and the sealing cover 2.

[0045] In some embodiments, as shown in Figure 3 and Figure 4 Further comprising a protective cup 5, which provides additional protection for the shell 1. The protective cup 5 is inserted into the centrifuge disc 4 to avoid direct collision or wear between the shell 1 and the centrifuge disc 4 caused by high-speed rotation or vibration during centrifugation, effectively prolonging the service life of the shell 1. At the same time, the protective cup 5 has a receiving cavity 501 for carrying the shell 1, and the shell 1 can be easily installed and removed before and after the centrifugation operation through the plug-in connection.

[0046] In some embodiments, as shown in Figure 3 and Figure 4 Further comprising a fastener 8 arranged on the protective cup 5, and the fastener 8 comprises a driving end and an abutting end. The fastener 8 has a first state and a second state. When the fastener 8 is in the first state, the abutting end abuts the shell 1. When the fastener 8 is in the second state, there is a disengagement gap between the abutting end and the shell 1. The driving end is used to drive the fastener 8 to switch between the first state and the second state. That is, the fastener 8 is used to fix the shell 1. When the fastener 8 is in the first state, the shell 1 can be firmly fixed in the protective cup 5, reducing the risk of loosening or displacement of the shell 1 during high-speed centrifugation, improving the overall safety of the centrifugation operation. At the same time, through the fixation of the fastener 8, the shell 1 will not directly rub or collide with the inner wall of the protective cup 5 during centrifugation, reducing the risk of shell 1 wear and tear and prolonging the service life of the shell 1. When it is necessary to take out the shell 1 from the receiving cavity 501, the driving end can be used to drive the fastener 8 to switch the fastener 8 from the first state to the second state. When the fastener 8 is in the second state, there is a disengagement gap between the abutting end and the shell 1, so that the shell 1 can be easily taken out by personnel.

[0047] And, in actual operation, the shell 1 for placing the battery 7 and storing the electrolyte is heated and expanded during the centrifugal process, which causes the shell 1 to be unable to be taken out from the protective cup body 5 on the centrifuge rotating disc 4 in time, and the shell 1 needs to be taken out after being naturally cooled, so that the liquid taking operation is performed, which causes low liquid taking efficiency, and during the natural cooling process of the shell 1, water further reacts with lithium salt and other components in the electrolyte to cause the detection result to be distorted, therefore, the shell 1 is fixed in the protective cup body 5 through the fastener 8, and enough space is reserved between the shell 1 and the protective cup body 5, so that the shell 1 is prevented from being clamped in the protective cup body 5 due to thermal expansion, thereby the shell 1 can be quickly taken out after the centrifugal operation is completed, the step of waiting for cooling is avoided, the sampling efficiency is improved, the time for water to further react with the electrolyte is reduced, decomposition or deterioration of lithium salt components is avoided, and the authenticity and reliability of the detection result are improved.

[0048] In some embodiments, reference is made to Figure 3 and Figure 4 As shown, the fastener 8 includes a screw, that is, a threaded hole is arranged on the protective cup body 5, the screw is extended to the inner side of the protective cup body 5 through the threaded hole and fixes the shell 1, meanwhile, the axis direction of the threaded hole is perpendicular to the axis direction of the protective cup body 5, so that the screw can be perpendicularly abut against the outer wall surface of the protective cup body 5 from the side, and the fastener 8 is arranged in multiple along the circumferential direction of the protective cup body 5, so that the fastening firmness can be improved through the multiple screws.

[0049] In some embodiments not shown, the fastener 8 can also be selected as a spring clamping structure, that is, a spring clamp or a pressing plate is arranged on the inner wall of the protective cup body 5, the spring generates a continuous clamping force, so that the shell 1 is firmly fixed, and the spring clamping structure can automatically adjust the fastening degree, and adapt to the slight size change of the shell 1 during the expansion or cooling process.

[0050] Based on the same inventive concept, the utility model also provides a centrifugal equipment, including electrolyte centrifugal frock as any above described, its technical effect is same with electrolyte centrifugal frock above described, here is not too much, and does not repeat.

[0051] Those skilled in the art will understand that the discussion of any of the above embodiments is merely exemplary and is not intended to suggest that the scope of the disclosure (including claims) be limited to these examples; the above embodiments or technical features among different embodiments can also be combined, steps can be implemented in any order, and there are many other changes to the different aspects of the utility model as described above, which are not provided in detail for the sake of brevity.

[0052] Embodiments of the present application are intended to encompass all such alternatives, modifications and variations falling within the broad scope of the appended claims. Accordingly, any omission, modification, substitution, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. An electrolyte centrifugation tool, characterized by, The application relates to a battery electrolyte centrifuging tool. The tool comprises a shell with a chamber, and a partition is arranged in the chamber to divide the chamber into a first receiving section and a second receiving section which are in communication with each other. A sealing cover is detachably connected to an opening part of the first receiving section.

2. The electrolyte centrifugation tool of claim 1, wherein, The sealing cover is provided with an embedding groove for receiving part of a battery, and when the sealing cover is connected to the shell, the embedding groove is buckled with the first receiving section to form a fixing cavity for clamping and fixing the battery.

3. The electrolyte centrifugation tool of claim 2, wherein, A sealing ring is arranged at a connecting part of the shell and the sealing cover.

4. The electrolyte centrifugation tool of claim 1, wherein, The partition comprises a partition plate which is connected to an inner wall of the chamber, and the partition plate is provided with a through hole for allowing electrolyte to flow.

5. The electrolyte centrifugation tool of claim 1, wherein, The tool further comprises a protection cup which is inserted into a rotating disc of a centrifuge, and the protection cup is provided with a receiving cavity for bearing the shell.

6. The electrolyte centrifugation tool of claim 5, wherein, The tool further comprises a fastener which is movably connected to the protection cup and comprises a driving end and an abutting end, and the fastener has a first state and a second state; when the fastener is in the first state, the abutting end abuts against the shell; when the fastener is in the second state, the abutting end has a disengaging gap with the shell, and the driving end is used to drive the fastener to switch between the first state and the second state.

7. The electrolyte centrifugation tool of claim 6, wherein, The fastener comprises a screw, and the protection cup is provided with a threaded hole for threadedly connecting the screw, and an axis direction of the threaded hole is perpendicular to an axis direction of the protection cup.

8. The electrolyte centrifugation tool of claim 6, wherein, A plurality of fasteners are arranged along a circumferential direction of the protection cup.

9. The electrolyte centrifugation tool of claim 2, wherein, Rubber gaskets are arranged on bottom surfaces of the embedding grooves and upper surfaces of the partition.

10. A centrifugal device, characterized by The tool further comprises the electrolyte centrifuging tool as claimed in any one of claims 1-9. ​

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