Battery cell hot-pressing mechanism

Abstract

The utility model discloses a battery cell hot-pressing mechanism, and relates to the technical field of lithium ion battery manufacturing. The hot pressing device comprises an upper hot pressing plate, a lower hot pressing plate, an upper fixing plate, a lower supporting plate, a side vertical plate, a hydraulic cylinder, a guide sliding rod, an upper hot pressing supporting plate, a first replacement bottom plate, a second replacement bottom plate, a photoelectric sensor and a proximity sensor. Piston rod output ends of the hydraulic cylinders are connected with the upper hot-pressing supporting plate; the guide sliding rods penetrate through the upper fixing plate in a sliding mode, the lower ends of the guide sliding rods are connected with the upper hot-pressing supporting plate, and an induction piece is arranged at the upper end of one guide sliding rod. The first replaceable bottom plate is detachably fixed to the bottom of the upper hot-pressing supporting plate. The upper hot pressing plate is mounted below the first replacement bottom plate; the second replaceable bottom plate is detachably fixed to the top of the lower supporting plate. And the lower hot pressing plate is mounted above the second replacement bottom plate. According to the utility model, a battery cell can be subjected to hot-pressing shaping, and positive and negative plates and a diaphragm are tightly attached together, so that the appearance of the battery cell is neat and attractive, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion battery manufacturing, in particular to a battery core hot pressing mechanism. Background Art

[0002] During the production of lithium-ion batteries, positive and negative electrodes and separators are assembled and manufactured into basic battery cells by winding or stacking. Since the positive and negative electrodes and separators inside the battery cells are relatively loose, a traditional method is to affix a large amount of tape around the edges of the battery cells to ensure a strong and secure internal structure. This tightly connects the internal structure of the battery cells and maintains stability, preventing displacement and expansion during subsequent manufacturing and use. However, this tape-attaching method is cumbersome, reducing the production efficiency of lithium-ion batteries. Furthermore, the tape does not form a regular and aesthetically pleasing surface on the battery cell surface. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a battery cell hot pressing mechanism, which can perform hot pressing and shaping on the battery cell, closely stick the positive and negative electrode sheets and the diaphragm together, make the battery cell appearance regular and beautiful, and improve production efficiency.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The lifting mechanism comprises a set of movable lids, a set of movable lids, and a movable lid, and the like. The set of movable lids is pivotally connected to the top of the movable lid and the lower support plate, and the set of movable lids is pivotally connected to the top of the movable lid. The movable lid is then connected to the bottom of the movable lid by a movable mechanism.

[0006] In some embodiments, the bottom surface of the upper hot press plate is provided with a square first pressing groove, and the top surface of the lower hot press plate is provided with a square second pressing groove corresponding to the first pressing groove. When the upper and lower hot press plates are pressed together, the first pressing groove and the second pressing groove cooperate to heat-press and shape the battery cells. Both the upper and lower hot press plates are equipped with built-in heating pipes.

[0007] Compared with the prior art, the present invention achieves at least the following beneficial effects:

[0008] When the photoelectric sensor detects that there are battery cells to be processed on the lower hot pressing plate, the hydraulic cylinder drives the upper hot pressing plate to move downward until it is pressed against the lower hot pressing plate. At this time, the hydraulic cylinder maintains the pressure. Under the high temperature and high pressure environment formed by the upper and lower hot pressing plates, the battery cells are hot-pressed and shaped, and the positive and negative electrodes and diaphragms of the battery cells are fused. The positive and negative electrodes and diaphragms are tightly attached together to eliminate the wrinkles of the battery cell diaphragms and improve the flatness and thickness consistency of the battery cells. Compared with the traditional operation method of sticking tape, the battery cells are hot-pressed and shaped by the battery cell hot pressing mechanism, which can make the appearance of the battery cells regular and beautiful, and improve the production efficiency of lithium-ion batteries. Moreover, the first replacement base plate and the second replacement base plate are easy to disassemble, and the upper and lower hot pressing plates of corresponding sizes can be replaced according to the battery cells of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] One or more embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0010] Figure 1 This is a front view of an embodiment of the present application;

[0011] Figure 2 for Figure 1 A local enlarged schematic diagram of area A;

[0012] Figure 3 This is a schematic diagram of the decomposition structure of an embodiment of the present application;

[0013] Figure 4 This is a schematic diagram of the decomposition structure from another perspective of an embodiment of the present application.

[0014] The numbers in the figure are: 1. Upper hot pressing plate; 11. First pressing groove; 2. Lower hot pressing plate; 21. Second pressing groove; 3. Upper fixed plate; 4. Lower supporting plate; 5. Side plate; 6. Hydraulic cylinder; 7. Guide slide; 71. Sensor plate; 8. Upper hot pressing support plate; 9. First replacement base plate; 10. Second replacement base plate; 20. Photoelectric sensor; 30. Upper positioning proximity sensor; 40. Lower positioning proximity sensor; 50. Heating tube; 60. Waist hole; 70. Connecting screw hole; 80. Synthetic stone plate; 90. Pressure reducing valve. DETAILED DESCRIPTION

[0015] The present invention will be described in detail below with reference to the exemplary embodiments in the accompanying drawings. However, it should be understood that the present invention can be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. These embodiments are provided herein to make the disclosure of the present application more complete and to fully convey the concepts of the present application to those skilled in the art.

[0016] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting this application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "several" and "multiple" mean two or more, unless otherwise clearly and specifically defined. In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. A person skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them. Furthermore, "above," "above," and "above" a first feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher level than the second feature. "Below," "below," and "below" a first feature may include the first feature being directly below or diagonally below the second feature, or simply indicate that the first feature is at a lower level than the second feature.

[0017] like Figures 1 to 4As shown, the cell hot pressing mechanism includes an upper hot pressing plate 1 and a lower hot pressing plate 2 arranged in parallel, and also includes an upper fixed plate 3, a lower supporting plate 4, two side vertical plates 5, a hydraulic cylinder 6, at least two guide slides 7, an upper hot pressing support plate 8, a first replacement base plate 9, a second replacement base plate 10, a photoelectric sensor 20 and a proximity sensor; the upper fixed plate 3 and the lower supporting plate 4 are arranged in parallel; the two side vertical plates 5 are fixedly connected between the upper fixed plate 3 and the lower supporting plate 4; the hydraulic cylinder 6 is installed on the top of the upper fixed plate 3, and the output end of its piston rod passes downward through the upper fixed plate 3 and is connected to the upper hot pressing support plate 8; the guide slide 7 slides It is passed through the upper fixed plate 3, and its lower end is connected to the upper hot pressing support plate 8, and a sensing sheet 71 is provided at the upper end of one of the guide slide rods 7; the first replacement base plate 9 is detachably fixed to the bottom of the upper hot pressing support plate 8; the upper hot pressing plate 1 is installed below the first replacement base plate 9; the second replacement base plate 10 is detachably fixed to the top of the lower support plate 4; the lower hot pressing plate 2 is installed above the second replacement base plate 10; the photoelectric sensor 20 is installed on the two side vertical plates 5, which is used to detect the presence or absence of the battery cell on the lower hot pressing plate 2; the proximity sensor is installed on the top of the upper fixed plate 3, which is used to detect the distance of the sensing sheet 71.

[0018] Specifically, a square first pressing groove 11 is provided on the bottom surface of the upper hot pressing plate 1, and a square second pressing groove 21 corresponding to the first pressing groove 11 is provided on the top surface of the lower hot pressing plate 2. When the upper hot pressing plate 1 and the lower hot pressing plate 2 are pressed together, the first pressing groove 11 and the second pressing groove 21 are used together to hot-press and shape the battery cell; and both the upper hot pressing plate 1 and the lower hot pressing plate 2 are equipped with heating tubes 50.

[0019] In some embodiments, a number of waist holes 60 are provided on both sides of the first replacement base plate 9 and the second replacement base plate 10; the upper hot pressing support plate 8 and the lower support plate 4 are provided with connecting screw holes 70 corresponding to the waist holes 60; thus, the first replacement base plate 9 and the upper hot pressing support plate 8, and the second replacement base plate 10 and the lower support plate 4 can be connected by screws, which is convenient for disassembly and replacement. Since the upper hot pressing plate 1 is installed below the first replacement base plate 9 and the lower hot pressing plate 2 is installed above the second replacement base plate 10, a set of upper hot pressing plates 1 and lower hot pressing plates 2 of corresponding sizes can be replaced by disassembling the first replacement base plate 9 and the second replacement base plate 10 according to different sizes of battery cells.

[0020] As a preferred embodiment, synthetic stone panels 80 are provided between the first replacement base plate 9 and the upper hot pressing plate 1, and between the second replacement base plate 10 and the lower hot pressing plate 2. The synthetic stone panels 80 mainly play the role of heat insulation, heat preservation and stable support. They can effectively prevent the heat from the upper hot pressing plate 1 and the lower hot pressing plate 2 from being directly transferred to the first replacement base plate 9 and the second replacement base plate 10, thereby reducing heat loss, improving hot pressing efficiency, maintaining a certain temperature during the hot pressing process, and providing stable support for the upper hot pressing plate 1 and the lower hot pressing plate 2, preventing the upper hot pressing plate 1 and the lower hot pressing plate 2 from deformation or displacement during the hot pressing process.

[0021] In some embodiments, the battery cell hot pressing mechanism further includes a pressure reducing valve 90, which is used to ensure that the pressure of the hydraulic cylinder 6 is stable within an appropriate range during the hot pressing process, thereby preventing damage to the battery cell or equipment due to excessive pressure.

[0022] In some embodiments, the photoelectric sensor 20 is a through-type photoelectric sensor. The photoelectric sensor 20 is located on both sides of the lower hot press plate 2, and the photoelectric sensor 20 is flush with the top surface of the lower hot press plate 2. When there are battery cells to be processed on the lower hot press plate 2, the light beam emitted by the emitter of the photoelectric sensor 20 will be blocked, and the detector of the photoelectric sensor 20 will not be able to receive the light signal, thereby triggering the output of the sensor.

[0023] In some embodiments, the proximity sensor includes an upper positioning proximity sensor 30 and a lower positioning proximity sensor 40 arranged from top to bottom, and the upper positioning proximity sensor 30 and the lower positioning proximity sensor 40 are located next to the sensing piece 71. It should be noted that the positions of the upper positioning proximity sensor 30 and the lower positioning proximity sensor 40 are set according to the distance the piston rod of the hydraulic cylinder 6 moves up and down. When the piston rod drives the upper hot pressing plate 1 to move downward to press with the lower hot pressing plate 2, the guide slide 7 drives the sensing piece 71 to move just to the lower positioning proximity sensor 40. The lower positioning proximity sensor 40 detects the sensing piece 71 and outputs a signal to the control system of the battery cell hot pressing mechanism, thereby controlling the hydraulic cylinder 6 to maintain pressure. After maintaining pressure for a certain period of time, the battery cell completes hot pressing and shaping. The piston rod drives the upper hot pressing plate 1 to move upward a specified distance. The guide slide 7 drives the sensing piece 71 to move to the upper positioning proximity sensor 30. The upper positioning proximity sensor 30 detects the sensing piece 71 and outputs a signal to the control system of the battery cell hot pressing mechanism, thereby controlling the hydraulic cylinder 6 to stop working, thus completing one battery cell hot pressing shaping.

[0024] When the battery cell hot pressing mechanism is in use, the photoelectric sensor 20 detects that there are battery cells to be processed on the lower hot pressing plate 2. The photoelectric sensor 20 outputs a signal to the control system, and the hydraulic cylinder 6 works. The hydraulic cylinder 6 drives the upper hot pressing plate 1 to move downward until the upper hot pressing plate 1 and the lower hot pressing plate 2 are pressed together. The hydraulic cylinder 6 maintains the pressure, and the heating tube 50 heats the upper hot pressing plate 1 and the lower hot pressing plate 2, thereby hot pressing and shaping the battery cells under high temperature and high pressure environment, and fusing the positive and negative electrodes and diaphragms of the battery cells to eliminate the wrinkles of the battery cell diaphragms, improve the flatness, thickness consistency and tightness of the internal structure of the battery cells, make the appearance of the battery cells regular, and eliminate the disadvantage that traditional wound or laminated battery cells still need a large amount of tape on the edges to fix them.

[0025] The battery cell hot pressing mechanism can improve the flatness of the battery cell after winding or lamination, eliminate diaphragm wrinkles, and the first replacement base plate 9 and the second replacement base plate 10 are easy to disassemble, so that the upper hot pressing plate 1 and the lower hot pressing plate 2 of corresponding sizes can be replaced and installed according to battery cells of different sizes.

[0026] It should be understood that all the above embodiments are illustrative rather than restrictive. Any modifications, equivalent changes and modifications made by those skilled in the art to the specific embodiments described above under the concept of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A battery cell hot pressing mechanism, comprising an upper hot pressing plate and a lower hot pressing plate arranged in parallel, characterized in that: The lifting mechanism comprises a lifting mechanism, a lifting mechanism, a lifting mechanism, a lifting mechanism for lifting the lifting mechanism, a lifting mechanism for lifting the lifting mechanism, a lifting mechanism for lifting the lifting mechanism, a lifting mechanism for lifting the lifting mechanism, a lifting mechanism for lifting the lifting mechanism, a lifting mechanism for lifting the lifting mechanism, a lifting mechanism for lifting the lifting mechanism, a lifting mechanism for lifting the lifting mechanism, and a lifting mechanism for lifting the lifting mechanism.

2. The battery core hot pressing mechanism according to claim 1, characterized in that: The bottom surface of the upper hot pressing plate is provided with a square first pressing groove, and the top surface of the lower hot pressing plate is provided with a square second pressing groove corresponding to the first pressing groove. When the upper hot pressing plate and the lower hot pressing plate are pressed together, the first pressing groove and the second pressing groove cooperate to perform hot pressing and shaping on the battery cell.

3. The battery core hot pressing mechanism according to claim 1 or 2, characterized in that: The upper hot pressing plate and the lower hot pressing plate are both provided with heating tubes.

4. The battery core hot pressing mechanism according to claim 1, characterized in that: Both sides of the first replacement base plate and the second replacement base plate are provided with a plurality of waist holes; the upper hot pressing support plate and the lower supporting plate are both provided with connecting screw holes corresponding to the waist holes.

5. The battery core hot pressing mechanism according to claim 1 or 4, characterized in that: A synthetic stone plate is provided between the first replacement base plate and the upper hot pressing plate, and between the second replacement base plate and the lower hot pressing plate.

6. The battery core hot pressing mechanism according to claim 1, characterized in that: The photoelectric sensor is a through-beam photoelectric sensor, and the photoelectric sensor is flush with the top surface of the lower hot pressing plate.

7. The battery core hot pressing mechanism according to claim 1, characterized in that: The proximity sensor includes an upper positioning proximity sensor and a lower positioning proximity sensor arranged from top to bottom, and the upper positioning proximity sensor and the lower positioning proximity sensor are located beside the sensing sheet.

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