Safety device for negative plate production

Abstract

The utility model provides a safety device for negative plate production, and belongs to the technical field of negative plate production. Comprising an electrolytic tank, a partition plate is fixed to the middle of the electrolytic tank and symmetrically divides the electrolytic tank into two lithium supplementing cavities used for containing negative electrode plates, a mounting groove is formed in the middle of the partition plate, the two sides of the mounting groove are open and communicate with the lithium supplementing cavities, and a lithium source fixing cylinder is mounted in the mounting groove in an inserted mode; a through groove is formed in the bottom of the lithium source fixing cylinder, two horizontal balance weight lugs are symmetrically fixed to the top of the lithium source fixing cylinder, a pressure switch for supporting the balance weight lugs is installed at the top of the partition plate, and the pressure switch is connected with an indicator. The lithium supplementing device not only can remind a user to replace a lithium source, but also can quickly fix the negative plate conveniently, is convenient to use integrally, and can improve the lithium supplementing efficiency of the negative plate, so that the quality safety of the negative plate is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of negative electrode sheet production, in particular to a safety device for negative electrode sheet production. Background Art

[0002] Lithium metal aggregation is a safety hazard in negative electrode production. For example, the formation of "lithium trees" can cause internal battery short circuits, capacity loss, and safety issues. Therefore, a specific lithium plating method is required to replenish lithium on the negative electrode sheet. This evenly distributes lithium throughout the negative electrode sheet, preventing abnormal lithium metal aggregation and reducing the risk of internal battery short circuits caused by lithium metal aggregation, thereby improving battery safety and performance.

[0003] Currently, chemical lithiation is a common method for lithium replenishment. Using an electrolytic cell, a low-potential lithium-containing chemical (lithium replenisher) reacts with the negative electrode material to reduce the negative electrode material and replenish lithium. However, in existing technologies, using electrolytic cells for lithium replenishment requires personnel to rely on experience to determine lithium source depletion and replenish it. This can lead to untimely replenishment, affecting the lithium replenishment effect and, in turn, the quality and safety of the negative electrode sheet.

[0004] Therefore, the present application provides a safety device for negative electrode sheet production to solve the above technical problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a safety device for producing negative electrode sheets to solve the problem in the prior art that it is not convenient to quickly replenish the lithium source, which affects the lithium replenishment effect of the negative electrode sheets.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A safety device for producing negative electrode sheets comprises an electrolytic cell, wherein a separator is fixed in the middle of the electrolytic cell, the separator symmetrically divides the electrolytic cell into two lithium replenishing cavities for placing negative electrode sheets, a mounting groove is provided in the middle of the separator, both sides of the mounting groove are open and communicate with the lithium replenishing cavities, a lithium source fixing cylinder is inserted and installed in the mounting groove, a through groove is provided at the bottom of the lithium source fixing cylinder, two horizontal counterweight ears are symmetrically fixed to the top of the lithium source fixing cylinder, a pressure switch supporting the counterweight ears is installed on the top of the separator, and the pressure switch is connected to an indicator.

[0008] Optionally, a limit plate is provided in the middle of each of the two lithium replenishing cavities, a limit groove for the negative electrode sheet to be inserted is formed between the limit plate and the side wall of the electrolytic cell, and a through opening is opened in the middle of the limit plate.

[0009] Optionally, an abutment plate is elastically mounted on a side of the limiting groove away from the limiting plate, and the limiting plate and the abutment plate elastically clamp the negative electrode sheet to form a fixed position.

[0010] Optionally, a plurality of horizontal elastic members are installed on a side of the abutment plate away from the limiting plate, and the elastic member includes a telescopic rod connecting the abutment plate and the electrolytic cell, and a spring is sleeved on the telescopic rod.

[0011] Optionally, an inclined plate for guiding the insertion of the negative electrode sheet is provided on the top of the abutment plate.

[0012] Optionally, a drain pipe is provided in the middle of the lower end surface of the electrolytic cell, the drain pipe is communicated with the lithium replenishing chamber, and a control valve is provided on the drain pipe.

[0013] Optionally, a plurality of vertical supporting legs are fixed around the lower end surface of the electrolytic cell.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] In the above scheme, thanks to the coordination of the partition plate, pressure switch, indicator, lithium source fixing cylinder and through groove, when the lithium source fixing cylinder is used to fix the lithium source (lithium salt, etc.), the pressure switch and indicator can be used to monitor the total weight of the lithium source fixing cylinder. When the lithium source is consumed to a certain extent, the pressure switch monitors the weight change and reminds to replace the lithium source through the indicator, so that the lithium source can be replaced in time, which is convenient to use.

[0016] In the above scheme, thanks to the cooperation of the limiting plate, the limiting groove, the abutment plate and the elastic member, the abutment plate can be used to elastically clamp the negative electrode sheet in the limiting groove, so that the side of the negative electrode sheet to be replenished with lithium is connected to the lithium replenishment cavity through the through opening, thereby quickly replenishing lithium to the negative electrode sheet.

[0017] In summary, this device can not only remind you to replace the lithium source, but also facilitate the quick fixation of the negative electrode sheet. It is easy to use as a whole and can improve the lithium replenishment efficiency of the negative electrode sheet, thereby ensuring the quality and safety of the negative electrode sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and enable those skilled in the relevant art to make and use the invention.

[0019] Figure 1 This is a schematic diagram of the structure of the safety device used in the production of negative electrode sheets;

[0020] Figure 2 This is a schematic diagram of the internal structure of the safety device used in negative electrode production;

[0021] Figure 3 Schematic diagram of the installation structure of the lithium source fixing cylinder, which is a safety device for negative electrode production;

[0022] Figure 4 Safety device for negative electrode production Figure 2 A magnified schematic diagram of the structure at center A.

[0023] [reference numerals]

[0024] 1. Electrolytic cell; 101. Support foot; 2. Drain pipe; 3. Partition plate; 301. Mounting slot; 302. Pressure switch; 303. Indicator; 4. Lithium source fixing cylinder; 401. Through slot; 402. Counterweight ear; 5. Lithium replenishing chamber; 6. Limit plate; 601. Through port; 7. Limit slot; 8. Abutment plate; 9. Elastic member; 901. Telescopic rod; 902. Spring.

[0025] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, devices and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0026] The following describes in detail a safety device for negative electrode sheet production provided by the present invention, with reference to the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative implementations for known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0027] It should be noted that references in the specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes such specific features, structures, or characteristics. In addition, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0028] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0029] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” means not only “directly on” something but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” means not only “on” or “above” something but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0030] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein should be similarly interpreted accordingly.

[0031] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a safety device for producing negative electrode sheets, comprising an electrolytic cell 1, a partition plate 3 being fixed in the middle of the electrolytic cell 1, the partition plate 3 symmetrically dividing the electrolytic cell 1 into two lithium replenishing chambers 5 for placing negative electrode sheets, and a drain pipe 2 is opened in the middle of the lower end surface of the electrolytic cell 1, the drain pipe 2 is connected to the lithium replenishing chamber 5, a control valve is provided on the drain pipe 2, and a plurality of vertical support legs 101 are fixed around the lower end surface of the electrolytic cell 1.

[0032] Cooperate Figure 3As shown, a mounting groove 301 is provided in the middle of the partition plate 3, and both sides of the mounting groove 301 are open and communicated with the lithium replenishing chamber 5, and a lithium source fixing cylinder 4 is inserted and installed in the mounting groove 301, and a through groove 401 is provided at the bottom of the lithium source fixing cylinder 4, and two horizontal counterweight ears 402 are symmetrically fixed on the top of the lithium source fixing cylinder 4, and a pressure switch 302 supporting the counterweight ears 402 is installed on the top of the partition plate 3, and the pressure switch 302 is connected to an indicator 303. In this embodiment, the lithium source fixing cylinder 4 can be made of special materials such as stainless steel, nickel alloy, or ceramic coating, polytetrafluoroethylene coating to protect the lithium source fixing cylinder to prevent the lithium source from reacting with air, moisture or cylinder wall material. The pressure switch 302 can be selected from but not limited to an electronic pressure switch containing a pressure sensor or a mechanical pressure switch, and the indicator 303 can be selected from but not limited to an LED indicator light, a buzzer, etc.

[0033] In addition, a limiting plate 6 is provided in the middle of the two lithium replenishing cavities 5, and a limiting groove 7 for the negative electrode sheet to be inserted is formed between the limiting plate 6 and the side wall of the electrolytic cell 1, and a through opening 601 is opened in the middle of the limiting plate 6, so that when the negative electrode sheet is inserted into the limiting groove 7, the side to be replenished with lithium will be connected to the lithium replenishing cavity 5 through the through opening 601.

[0034] Cooperate Figure 4 As shown, an abutment plate 8 is elastically mounted in the limiting groove 7 on the side away from the limiting plate 6. A slanted plate is provided on the top of the abutment plate 8 to guide the insertion of the negative electrode sheet. The limiting plate 6 and the abutment plate 8 elastically clamp the negative electrode sheet to secure it. Specifically, a plurality of horizontal elastic members 9 are mounted on the side of the abutment plate 8 away from the limiting plate 6. The elastic members 9 include a telescopic rod 901 connecting the abutment plate 8 and the electrolytic cell 1. The telescopic rod 901 is sleeved with a spring 902.

[0035] The working principle provided by the present invention is that the safety device for negative electrode sheet production can be used. When in use, a lithium source (lithium salt, etc.) can be inserted into the lithium source fixing cylinder 4, which is connected to the lithium replenishing chamber 5 on both sides of the partition plate 3 through the through groove 401. Then, the pressure switch 302 and the indicator 303 are used to monitor the total weight of the lithium source fixing cylinder 4. When the lithium source is consumed to a certain extent, the pressure switch 302 monitors the weight change and reminds the user to replace the lithium source through the indicator 303, so that the lithium source can be replaced in time, which is convenient to use.

[0036] At the same time, when the negative electrode sheet is fixed in the limiting groove 7, the abutment plate 8 can be used to elastically clamp the negative electrode sheet in the limiting groove 7, so that the side of the negative electrode sheet to be replenished with lithium is connected to the lithium replenishment chamber 5 through the through hole 601, thereby quickly replenishing lithium to the negative electrode sheet.

[0037] In summary, this device can not only remind you to replace the lithium source, but also facilitate the quick fixation of the negative electrode sheet. It is easy to use as a whole and can improve the lithium replenishment efficiency of the negative electrode sheet, thereby ensuring the quality and safety of the negative electrode sheet.

[0038] This invention encompasses any alternatives, modifications, equivalents, and solutions that do not depart from the spirit and scope of this invention. To provide a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments of this invention, but those skilled in the art will be able to fully understand this invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A safety device for producing negative electrode sheets, comprising an electrolytic cell (1), characterized in that: A separator (3) is fixed in the middle of the electrolytic cell (1), and the separator (3) symmetrically divides the electrolytic cell (1) into two lithium replenishing cavities (5) for placing negative electrode sheets. A mounting groove (301) is provided in the middle of the separator (3), and both sides of the mounting groove (301) are open and communicated with the lithium replenishing cavities (5). A lithium source fixing cylinder (4) is inserted and installed in the mounting groove (301), and a through groove (401) is provided at the bottom of the lithium source fixing cylinder (4). Two horizontal counterweight ears (402) are symmetrically fixed on the top of the lithium source fixing cylinder (4). A pressure switch (302) supporting the counterweight ears (402) is installed on the top of the separator (3), and the pressure switch (302) is connected to an indicator (303).

2. The safety device for negative electrode sheet production according to claim 1, characterized in that: A limiting plate (6) is provided in the middle of each of the two lithium replenishing chambers (5), a limiting groove (7) for the negative electrode sheet to be inserted is formed between the limiting plate (6) and the side wall of the electrolytic cell (1), and a through opening (601) is opened in the middle of the limiting plate (6).

3. The safety device for negative electrode sheet production according to claim 2, characterized in that: An abutment plate (8) is elastically mounted on a side of the limiting groove (7) away from the limiting plate (6), and the limiting plate (6) and the abutment plate (8) elastically clamp the negative electrode sheet to form a fixed position.

4. The safety device for negative electrode sheet production according to claim 3, characterized in that: A plurality of horizontal elastic members (9) are installed on a side of the abutment plate (8) away from the limiting plate (6), and the elastic member (9) includes a telescopic rod (901) connecting the abutment plate (8) and the electrolytic cell (1), and a spring (902) is sleeved on the telescopic rod (901).

5. The safety device for negative electrode sheet production according to claim 3, characterized in that: The top of the abutment plate (8) is provided with an inclined plate for guiding the insertion of the negative electrode sheet.

6. The safety device for negative electrode sheet production according to claim 1, characterized in that: A drain pipe (2) is provided in the middle of the lower end surface of the electrolytic cell (1), the drain pipe (2) is communicated with the lithium replenishing chamber (5), and a control valve is provided on the drain pipe (2).

7. The safety device for negative electrode sheet production according to claim 6, characterized in that: A plurality of vertical supporting legs (101) are fixed around the lower end surface of the electrolytic cell (1).

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