Solid-state battery mold with in-situ pressure monitoring function

Abstract

The utility model discloses an in-situ pressure monitoring solid-state battery mold, and particularly relates to the technical field of solid-state battery molds, the in-situ pressure monitoring solid-state battery mold comprises a metal piece I, a metal piece II is arranged at the bottom of the metal piece I, and round holes and threaded holes are formed in the tops of the metal piece I and the metal piece II; the bottom of the first metal piece and the top of the second metal piece are each provided with a center round hole, a slotting upper ejector head is movably inserted into the center round hole in the bottom of the first metal piece, an insulating sleeve is arranged at the bottom of the slotting upper ejector head, the bottom end of the slotting upper ejector head is movably inserted into the inner wall of the insulating sleeve, and a slotting lower ejector head is movably inserted into the inner wall of the bottom end of the insulating sleeve. The bottom of the slotting lower ejection head is fixedly connected with a PVC flexible glue module, the bottom of the PVC flexible glue module is fixedly connected with a stainless steel ejection head, and the bottom end of the stainless steel ejection head is movably inserted into a central round hole in the top of the second metal piece, so that the problems that an existing battery mold can only test the conventional electrochemical performance of a battery cell and is single in function are solved.

Description

Technical Field

[0001] The utility model relates to the field of solid-state battery molds, and in particular to a solid-state battery mold with in-situ pressure monitoring. Background Art

[0002] All-solid-state lithium batteries have attracted widespread attention in the current field of lithium battery technology, mainly because they have higher safety and energy density. Compared with traditional lithium batteries using organic liquid electrolytes, all-solid-state lithium batteries are seen as potential alternatives in the future. However, the cell materials of solid-state batteries undergo significant volume changes during the cycle process. By studying the changes in battery pressure, the volume changes of the cell can be fed back. Real-time pressure monitoring can also effectively guide the design of high-performance all-solid-state lithium batteries.

[0003] However, on the one hand, the existing solid-state battery molds have the problems of single function, complex process and difficult operation, which leads to high testing costs and inefficient battery performance testing; on the other hand, even if there are some solid-state battery molds on the market that are used with pressure sensors, they have low precision, inaccurate testing and are greatly affected by the external environment. Therefore, there is an urgent need to develop an integrated, high-precision in-situ pressure monitoring solid-state battery mold to achieve battery testing while taking into account real-time monitoring of internal pressure changes in battery cells. Utility Model Content

[0004] The purpose of the utility model is to provide a solid-state battery mold with in-situ pressure monitoring to solve the above-mentioned deficiencies in the technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a solid-state battery mold with in-situ pressure monitoring, comprising:

[0006] A metal part 1, wherein a metal part 2 is arranged at the bottom of the metal part 1, a round hole and a threaded hole are provided at the tops of the metal part 1 and the metal part 2, a central round hole is provided at the bottom of the metal part 1 and the top of the metal part 2, a slotted upper top head is movably inserted into the central round hole at the bottom of the metal part 1, an insulating sleeve is arranged at the bottom of the slotted upper top head, the bottom end of the slotted upper top head is movably inserted into the inner wall of the insulating sleeve, the inner wall of the bottom end of the insulating sleeve is movably inserted into the slotted lower top head, the bottom of the slotted lower top head is fixedly connected with a PVC soft rubber module, the bottom of the PVC soft rubber module is fixedly connected with a stainless steel top head, and the bottom end of the stainless steel top head is movably inserted into the central round hole at the top of the metal part 2;

[0007] The threaded column, the metal component 2 is threadedly connected to the metal component 1 through the threaded column.

[0008] Preferably, an insulating collar is movably sleeved on the surface of the threaded column, and a side surface of the insulating collar is movably inserted into a circular hole at the top of the first metal piece or the second metal piece.

[0009] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0010] By having;

[0011] 1. By setting up metal part 1 and metal part 2, metal part 1 and metal part 2 ensure the same specification parameters, there is no need to distinguish between metal part 1 and metal part 2, reducing processing procedures and processing costs, and no classification management is required during batch testing and disassembly.

[0012] 2. The PVC soft glue module can effectively feedback the volume change inside the battery cell. The volume change squeezes the oblique cylindrical PVC soft glue module to deform, changing the refractive index of the internal grating area. The light signal of a specific wavelength will be reflected back by the fiber Bragg grating sensor and processed by the spectrum demodulator to obtain the change in the wavelength of the light signal, so as to achieve the purpose of real-time monitoring of the pressure change inside the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0016] Description of reference numerals:

[0017] 1. Metal part 1; 2. Insulating sleeve; 3. Threaded column; 4. PVC soft rubber module; 5. Stainless steel jack; 6. Insulating collar; 7. Metal part 2; 8. Slotted upper jack; 9. Slotted lower jack. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] The utility model provides Figure 1-Figure 2 A solid-state battery mold with in-situ pressure monitoring is shown, comprising:

[0020] A metal part 1, a metal part 2 7 is arranged at the bottom of the metal part 1, a circular hole and a threaded hole are provided at the top of the metal part 1 and the metal part 2 7, a central circular hole is provided at the bottom of the metal part 1 and the top of the metal part 2 7, a slotted upper top head 8 is movably inserted into the central circular hole at the bottom of the metal part 1, an insulating sleeve 2 is arranged at the bottom of the slotted upper top head 8, the bottom end of the slotted upper top head 8 is movably inserted into the inner wall of the insulating sleeve 2, the inner wall of the bottom end of the insulating sleeve 2 is movably inserted into the slotted lower top head 9, the bottom of the slotted lower top head 9 is fixedly connected with a PVC soft rubber module 4, the bottom of the PVC soft rubber module 4 is fixedly connected with a stainless steel top head 5, the bottom end of the stainless steel top head 5 is movably inserted into the central circular hole at the top of the metal part 2 7;

[0021] The threaded column 3 and the metal part 2 7 are threadedly connected with the metal part 1 through the threaded column 3, so as to realize the purpose of real-time monitoring of the internal pressure change of the battery cell.

[0022] Furthermore, an insulating collar 6 is movably sleeved on the surface of the threaded column 3, and the side surface of the insulating collar 6 is movably inserted into the circular hole on the top of the metal piece 1 or the metal piece 2 7 to isolate electronic conduction.

[0023] Through the above technical solution:

[0024] Two sets of identical mold metal parts 1 and metal parts 2 7, threaded columns 3, slotted upper heads 8 and stainless steel heads 5 are assembled together to form two plates. The use of insulating rings 6 can ensure good air tightness, and metal parts 2 7 are isolated from electronic conduction by insulating rings 6.

[0025] Then, the PVC soft glue module is connected to the external spectrum demodulator, and then the insulating sleeve 2 is put on the slotted lower head 9 on the top of the PVC soft glue module 4 as the lower electrode plate, the electrolyte powder is placed in the insulating sleeve 2, and the other set of plates is put into the slotted upper head 8 as the upper electrode plate;

[0026] The upper electrode plate and the lower electrode plate are assembled together, and a certain pressure is applied by an external press device to achieve the effect of locking and maintaining pressure. At this time, the PVC soft rubber module body is deformed due to extrusion, thereby changing the refractive index of the internal grating area. The light signal of a specific wavelength will be reflected back by the fiber Bragg grating sensor and processed by the spectrum demodulator to obtain the change in the wavelength of the light signal, thereby achieving the purpose of real-time monitoring of the internal pressure change of the battery cell.

[0027] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A solid-state battery mold with in-situ pressure monitoring, characterized in that: include: A metal part (1), wherein a metal part (7) is arranged at the bottom of the metal part (1), a circular hole and a threaded hole are provided at the tops of the metal part (1) and the metal part (7), and a central circular hole is provided at the bottom of the metal part (1) and the top of the metal part (7), and a slotted upper head (8) is movably inserted into the central circular hole at the bottom of the metal part (1), and an insulating sleeve (2) is arranged at the bottom of the slotted upper head (8), and the bottom end of the slotted upper head (8) is movably inserted into the inner wall of the insulating sleeve (2), and the inner wall of the bottom end of the insulating sleeve (2) is movably inserted into the slotted lower head (9), and the bottom of the slotted lower head (9) is fixedly connected to a PVC soft rubber module (4), and the bottom of the PVC soft rubber module (4) is fixedly connected to a stainless steel head (5), and the bottom end of the stainless steel head (5) is movably inserted into the central circular hole at the top of the metal part (7); The threaded column (3), the metal component 2 (7) is threadedly connected to the metal component 1 (1) via the threaded column (3).

2. The solid-state battery mold with in-situ pressure monitoring according to claim 1, characterized in that: An insulating collar (6) is movably sleeved on the surface of the threaded column (3), and a side surface of the insulating collar (6) is movably inserted into a circular hole at the top of the first metal piece (1) or the second metal piece (7).

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