Battery cell hot-pressing mechanism and battery cell processing device

Abstract

The utility model discloses a battery cell hot-pressing mechanism and a battery cell processing device, the battery cell hot-pressing mechanism comprises a rack and a hot-pressing assembly installed on the rack, the hot-pressing assembly comprises a hot-pressing platform, a first driving piece, a hot-pressing plate group, a pressure maintaining machine, a second driving piece and a stroke supplementing assembly; according to the scheme of the utility model, before hot pressing of the battery cell, the pressing end of the pressure maintaining machine is in a retracted state, and the travel supplementing assembly and the main body of the second driving part are positioned on the two opposite sides of the pressing end, so that the dislocation space between the hot pressing plate group and the edge of the end of the pressure maintaining machine can be effectively utilized, the structure is relatively compact, and simplification and miniaturization of the battery cell hot pressing mechanism are facilitated. After the battery cell is placed on the hot pressing platform, the abutting end of the pressure maintaining machine begins to press downwards, the first driving piece drives the hot pressing plate set to move downwards and be away from the abutting end, then the second driving piece drives the stroke supplementing assembly to move to the alignment position, and pressure is conducted to the battery cell through the hot pressing plate set.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery cell processing equipment, especially to a battery cell hot pressing mechanism and a battery cell processing device. BACKGROUND

[0002] In the production process of lithium batteries, the battery cell needs to be hot pressed to reduce the internal gap of the battery cell, increase the contact area between the positive and negative materials and the separator, improve the charge and discharge efficiency of the battery, and also can fix the internal structure of the battery cell to prevent the movement or misplacement of the material during the charge and discharge process, thereby improving the safety and stability of the battery.

[0003] However, in the existing hot pressing process, the battery cell is placed on the hot pressing platform of the battery cell hot pressing mechanism, and then the pressure maintaining machine pushes the hot pressing plate set, so that the hot pressing plate set is pressed on the battery cell. After the hot pressing is completed, the end of the pressure maintaining machine and the hot pressing plate set are reset, and the space between the hot pressing plate set and the hot pressing platform is released to replace the battery cell. The stroke of the end of the pressure maintaining machine is large, the running time is long, and the hot pressing efficiency is low in batch production. SUMMARY

[0004] The main purpose of the utility model is to provide a battery cell hot pressing mechanism and a battery cell processing device, which aims to improve the hot pressing efficiency of the battery cell.

[0005] To achieve the above purpose, the utility model provides a battery cell hot pressing mechanism, which comprises:

[0006] A rack;

[0007] A hot pressing assembly is installed on the rack, and the hot pressing assembly comprises a hot pressing platform, a first driving member, a hot pressing plate set, a pressure maintaining machine, a second driving member and a stroke supplement assembly. The second driving member and the stroke supplement assembly are installed on the top surface of the hot pressing plate set. The hot pressing platform is used for placing the battery cell. The hot pressing plate set is arranged above the hot pressing platform and can move vertically under the drive of the first driving member. The pressure maintaining machine has a pressing end, which is arranged above the hot pressing plate set and can move vertically. The second driving member comprises a main body and an output shaft, and the output shaft is connected to the stroke supplement assembly.

[0008] The stroke supplement assembly is movably installed on the hot pressing plate set. The stroke supplement assembly can be moved to a positioning position or a mispositioning position under the drive of the output shaft of the second driving member. When the second driving member is at the positioning position, the stroke supplement assembly is vertically aligned with the pressing end. When the second driving member is at the mispositioning position, the stroke supplement assembly is vertically misaligned with the pressing end and is located on the opposite sides of the main body relative to the pressing end.

[0009] In some embodiments of the utility model, the top surface of the hot pressing plate group is provided with two slide rests, the stroke supplement assembly is in sliding fit with the slide rest, the extension direction of the slide rest is parallel to the arrangement of the output shaft, and the output shaft moves along the axial direction under the driving of the main body.

[0010] In some embodiments of the utility model, the stroke supplement assembly comprises a fixed plate, a pressing piece and an elastic piece connected between the fixed plate and the pressing piece, the slide rest is provided with two and is in sliding fit with the opposite two ends of the fixed plate respectively, the fixed plate is provided with a through hole between the two slide rests, and the pressing piece partially penetrates through the through hole to abut against the hot pressing plate group.

[0011] In some embodiments of the utility model, the pressing piece comprises a plate body part and a column body part, the column body part is connected to the middle part of the plate body part, the two ends of the column body part are respectively protruded from the two surfaces of the plate body part, the bottom end of the column body part is matched with the through hole, and the elastic piece is connected between the plate body part and the fixed plate.

[0012] In some embodiments of the utility model, a plurality of elastic pieces are arranged around the column body part.

[0013] In some embodiments of the utility model, the stroke supplement assembly further comprises a guide piece, one side of the fixed plate towards the plate body part is provided with a guide column, and the guide piece is connected to the plate body part and is in sliding fit with the guide column.

[0014] In some embodiments of the utility model, the stroke supplement assembly is provided with two guide pieces, the two guide pieces are arranged on the two sides of the column body part along the extension direction perpendicular to the slide rest, the fixed plate is provided with two guide columns, and the two guide columns are matched with the two guide pieces respectively.

[0015] In some embodiments of the utility model, the rack comprises a base, a top plate and a plurality of guide rods connected between the base and the top plate, the hot pressing platform is installed on the top surface of the base, the edges of the hot pressing plate group are in sliding fit with the plurality of guide rods, and the first driving piece is installed on the top plate.

[0016] In some embodiments of the utility model, the hot pressing plate group comprises an installation plate and a heating plate, the heating plate is installed on the bottom surface of the installation plate, the second driving piece and the stroke supplement assembly are installed on the top surface of the installation plate, the edges of the installation plate are in sliding fit with the plurality of guide rods, and the heating plate is arranged in the plurality of guide rods.

[0017] The utility model discloses still propose a kind of battery cell processing device, including the battery cell hot-pressing mechanism above-mentioned, the battery cell hot-pressing mechanism includes rack, installs the hot-pressing platform of the rack, first driving part, hot-pressing plate group, pressure retaining machine, and second driving part and stroke supplement assembly installed to the top surface of the hot-pressing plate group;Wherein,

[0018] The hot-pressing platform is used for placing the battery cell.

[0019] The hot-pressing plate group is arranged above the hot-pressing platform and can move vertically under the drive of the first driving part.

[0020] The pressure retaining machine has a pressing end, which is arranged above the hot-pressing plate group and can move vertically.

[0021] The second driving part includes a main body and an output shaft, and the output shaft is connected to the stroke supplement assembly.

[0022] The stroke supplement assembly is movably installed on the hot-pressing plate group. The stroke supplement assembly can be moved to a correct position or a misaligned position under the drive of the output shaft of the second driving part. When the second driving part is in the correct position, the stroke supplement assembly is vertically aligned with the pressing end. When the second driving part is in the misaligned position, the stroke supplement assembly is vertically misaligned with the pressing end and located on the opposite sides of the main body relative to the pressing end.

[0023] In the above scheme, before the battery cell hot-pressing, the pressing end of the pressure retaining machine is in a retracted state, and the stroke supplement assembly and the main body of the second driving part are located on the opposite sides of the pressing end. The misaligned space between the hot-pressing plate group and the end edge of the pressure retaining machine can be effectively utilized, the structure is compact, and the battery cell hot-pressing mechanism is simplified and miniaturized. After the battery cell is placed on the hot-pressing platform, the pressing end of the pressure retaining machine starts to press down, the first driving part drives the hot-pressing plate group to move downward and away from the pressing end, the interval between the hot-pressing plate group and the pressing end increases, and then the second driving part drives the stroke supplement assembly to move to the correct position. In this way, the pressure retaining machine can press against the stroke supplement assembly and transmit the pressure to the battery cell through the hot-pressing plate group. In this process, the stroke of the pressing end of the pressure retaining machine is small, which is beneficial to shorten the time from the start of the pressure retaining machine to the movement of the hot-pressing plate group and the stroke supplement assembly to the correct position, and improve the hot-pressing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0025] Figure 1 The structural schematic diagram of an embodiment of the battery cell hot pressing mechanism provided by the present application is shown in the figure.

[0026] Figure 2 The structural schematic diagram of an embodiment of the stroke supplement assembly provided by the present application is shown in the figure.

[0027] Explanation of reference numerals:

[0028] 100, battery cell hot pressing mechanism; 10, rack; 11, base; 12, top plate; 13, guide rod; 20, hot pressing platform; 30, first driving member; 40, hot pressing plate set; 41, ram; 42, mounting plate; 43, heating plate; 50, pressure maintaining machine; 51, pressing end; 60, second driving member; 61, main body; 62, output shaft; 70, stroke supplement assembly; 71, fixed plate; 711, through hole; 712, guide column; 72, pressing member; 721, plate body part; 722, column body part; 73, elastic member; 74, guide member.

[0029] The realization, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0031] It should be noted that if the present application embodiments involve directional indications (such as up, down, left, right, front, back, …), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, if the certain posture changes, the directional indications also change accordingly.

[0032] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0033] Please refer to Figure 1 And Figure 2 The utility model proposes a kind of battery cell hot-pressing mechanism 100, including rack 10 and install the hot-pressing assembly of rack 10, hot-pressing assembly includes hot-pressing platform 20, first driving part 30, hot-pressing plate group 40, pressure retaining machine 50, second driving part 60 and stroke supplement assembly 70;Second driving part 60 and stroke supplement assembly 70 are installed to the top surface of hot-pressing plate group 40, hot-pressing platform 20 is used to place battery cell, hot-pressing plate group 40 is set up in the above of hot-pressing platform 20, and can be driven under the first driving part 30 along vertical activity, pressure retaining machine 50 has end head 51 of pressing, end head 51 is set up in the above of hot-pressing plate group 40 with interval, and can be moved along vertical, second driving part 60 includes main body 61 and output shaft 62, output shaft 62 connects stroke supplement assembly 70;Stroke supplement assembly 70 is movably installed to hot-pressing plate group 40, stroke supplement assembly 70 can be moved to alignment position or misalignment position under the output shaft 62 of second driving part 60, when second driving part 60 is located in alignment position, stroke supplement assembly 70 and end head 51 are aligned in vertical, when second driving part 60 is located in misalignment position, stroke supplement assembly 70 and end head 51 are misaligned in vertical, and with main body 61 located on the opposite sides of end head 51. Above-mentioned first driving part 30 and second driving part 60 can be cylinder, linear motor, hydraulic cylinder and the like, not limited here.

[0034] The utility model discloses a scheme above, in the process of electric core hot pressing, the pressure -retaining machine 50's end head 51 is in the retracted state, and the stroke supplement assembly 70 and the main body 61 of second driving part 60 are located on the opposite sides of end head 51, can effectively utilize the misregistration space of hot pressing plate group 40 and pressure -retaining machine 50 end head edge, structure is more compact, is favorable to the simplification miniaturization of electric core hot pressing mechanism 100. After the electric core is placed in hot pressing platform 20, the end head 51 of pressure -retaining machine 50 starts to press down, and the first driving part 30 drives hot pressing plate group 40 to move down and away from end head 51, and the interval between hot pressing plate group 40 and end head 51 increases, and then the second driving part 60 drives stroke supplement assembly 70 to move to the alignment position, so that the pressure -retaining machine 50 can be through the end of stroke supplement assembly 70 and pass through hot pressing plate group 40 and transmit the pressure to the electric core, in this process, the end head 51 of pressure -retaining machine 50 has small stroke, and it is favorable to shorten the time of pressure -retaining machine 50 from starting to work to hot pressing plate group 40 and stroke supplement assembly 70 moving to the position, improves hot pressing efficiency.

[0035] The stroke supplement assembly 70 is generally slidably installed on the hot pressing plate group 40, and the specific embodiments are various, in some embodiments of the utility model, the top surface of the hot pressing plate group 40 is provided with a sliding groove, and the stroke supplement assembly 70 is installed in the sliding groove.

[0036] In some other embodiments of the utility model, the top surface of the hot pressing plate group 40 is provided with two slide rests 41, the stroke supplement assembly 70 is slidably connected with the slide rests 41, the extension direction of the output shaft 62 and the slide rest 41 is parallelly arranged, and the output shaft 62 moves along the axial direction under the driving of the main body 61. In this way, the top surface of the hot pressing plate group 40 and the hot pressing plate main body form a space, which can avoid the heat generated by the hot pressing plate group 40 from being conducted to the stroke supplement assembly 70.

[0037] The specific embodiments of the stroke supplement assembly 70 are various, in some embodiments of the utility model, the stroke supplement assembly 70 comprises a sliding block. In some other embodiments of the utility model, the stroke supplement assembly 70 comprises a fixed plate 71, a pressing piece 72 and an elastic piece 73 connected between the fixed plate 71 and the pressing piece 72, the slide rest 41 is provided with two and is slidably connected with the opposite ends of the fixed plate 71 respectively, the fixed plate 71 is provided with a through hole 711 corresponding to the position between the two slide rests 41, and the pressing piece 72 partially penetrates through the through hole 711 to abut against the hot pressing plate group 40. In this way, when the end head 51 abuts against the pressing piece 72, the elastic piece 73 can play a buffering role, which can avoid the rigid impact on the fixed plate 71 and is favorable to prolong the service life.

[0038] The elastic member 73 can be a spring or rubber, and in some embodiments of the present application, the pressing member 72 comprises a plate body 721 and a column body 722, the column body 722 is connected to the middle part of the plate body 721, the two ends of the column body 722 protrude from the two sides of the plate body 721 respectively, the bottom end of the column body 722 is matched with the through hole 711, and the elastic member 73 is connected between the plate body 721 and the fixed plate 71.

[0039] Further, in some embodiments of the present application, the elastic member 73 is provided in plurality, and the plurality of elastic members 73 are arranged around the column body 722. In this way, when the plate body 721 is pressed, the force of the spring in each direction is more balanced, and the angle between the pressing member 72 and the fixed plate 71 can be prevented from being deflected.

[0040] In order to further improve the stability between the pressing member 72 and the fixed plate 71, in some embodiments of the present application, the stroke supplement assembly 70 further comprises a guide member 74, one side of the fixed plate 71 facing the plate body 721 is provided with a guide column 712, and the guide member 74 is connected to the plate body 721 and is in sliding fit with the guide column 712. In this way, the guide column 712 generates a guide force on the pressing member 72, so as to prevent the pressing member 72 from being deflected.

[0041] In some embodiments of the present application, the stroke supplement assembly 70 is provided with two guide members 74, the two guide members 74 are arranged on the two sides of the column body 722 along the extension direction perpendicular to the ram 41, the fixed plate 71 is provided with two guide columns 712, and the two guide columns 712 are matched with the two guide members 74 respectively. In this way, the width of the stroke supplement assembly 70 in the extension direction of the ram 41 is small, which can adapt to a smaller space between the low-pressure end and the rack 10, and is beneficial to the miniaturization of the mechanism as a whole.

[0042] In some embodiments of the present application, the rack 10 comprises a base 11, a top plate 12 and a plurality of guide rods 13 connected between the base 11 and the top plate 12, the hot-pressing platform 20 is installed on the top surface of the base 11, the edges of the hot-pressing plate group 40 are in sliding fit with the plurality of guide rods 13, and the first driving member 30 is installed on the top plate 12. Among them, the guide rod 13 not only plays a role in guiding the hot-pressing plate group 40, but also supports between the top plate 12 and the base 11, simplifies the structure and reduces the cost.

[0043] In some embodiments of the utility model, hot pressing plate group 40 includes mounting plate 42 and heating plate 43, heating plate 43 is installed on the bottom surface of mounting plate 42, second driving part 60 and stroke supplement assembly 70 are installed on the top surface of mounting plate 42, the edge of mounting plate 42 is slidably connected with multiple guide rods 13, and heating plate 43 is spaced apart from multiple guide rods 13. In this way, due to the blocking of mounting plate 42, only a small part of the heat generated by heating plate 43 is conducted to heating plate 43 and other components connected with mounting plate 42. The heating plate generally adopts a resistance heating mode, of course, induction heating and other modes can also be used, which are not limited here.

[0044] In some embodiments of the utility model, a heat insulation plate is arranged between heating plate 43 and mounting plate 42 to reduce the heat conducted by heating plate 43 to mounting plate 42.

[0045] The utility model also provides an electric core processing device, including above-mentioned electric core hot pressing mechanism 100. Because the electric core processing device adopts all the technical schemes of the above-mentioned embodiments, it has at least all the technical effects brought by all the technical schemes of the above-mentioned embodiments, which will not be repeated here.

[0046] The above-mentioned is only the exemplary implementation of the utility model, and does not limit the patent range of the utility model, and all equivalent structural transformations made by the utility model specification and the attached drawings under the technical concept of the utility model, or direct / indirect application in other related technical fields are included in the patent protection range of the utility model.

Claims

1. An electrode core hot press mechanism (100), characterized by, The utility model relates to a hot-pressing device for battery cell, which comprises a rack (10) and a hot-pressing assembly installed on the rack (10). The hot-pressing assembly comprises a hot-pressing platform (20), a first driving member (30), a hot-pressing plate group (40), a pressure maintaining machine (50), a second driving member (60) and a stroke supplement assembly (70). The second driving member (60) and the stroke supplement assembly (70) are installed on the top surface of the hot-pressing plate group (40). The hot-pressing platform (20) is used for placing battery cells.

2. The cell heat press mechanism of claim 1, wherein, The hot-pressing plate group (40) is arranged above the hot-pressing platform (20) and can move vertically under the drive of the first driving member (30).

3. The cell heat press mechanism of claim 2, wherein, The pressure maintaining machine (50) has a pressing end head (51) which is arranged above the hot-pressing plate group (40) and can move vertically.

4. The cell hot press mechanism (100) of claim 3, wherein, The second driving member (60) comprises a main body (61) and an output shaft (62).

5. The cell hot press mechanism (100) of claim 4, wherein, The output shaft (62) is connected with the stroke supplement assembly (70). The stroke supplement assembly (70) is movably installed on the hot-pressing plate group (40). The stroke supplement assembly (70) can move to a position of alignment or a position of misalignment under the drive of the output shaft of the second driving member (60). When the second driving member (60) is in the position of alignment, the stroke supplement assembly (70) is vertically aligned with the pressing end head (51). When the second driving member (60) is in the position of misalignment, the stroke supplement assembly (70) is vertically misaligned with the pressing end head (51) and is arranged on the opposite side of the main body (61) relative to the pressing end head (51). The top surface of the hot-pressing plate group (40) is provided with two slides (41). The stroke supplement assembly (70) is in sliding cooperation with the slides (41). The output shaft (62) is arranged in parallel with the extension direction of the slides (41) and moves axially under the drive of the main body (61). The stroke supplement assembly (70) comprises a fixed plate (71), a pressing member (72) and an elastic member (73) connected between the fixed plate (71) and the pressing member (72). The slides (41) are arranged in two and are in sliding cooperation with the opposite ends of the fixed plate (71). The fixed plate (71) is provided with a through hole (711) corresponding to the position between the two slides (41). The pressing member (72) partially penetrates the through hole (711) to abut against the hot-pressing plate group (40). The pressing member (72) comprises a plate body part (721) and a column body part (722). The column body part (722) is connected to the middle part of the plate body part (721). The bottom end of the column body part (722) is in cooperation with the through hole (711). The elastic member (73) is connected between the plate body part (721) and the fixed plate (71). The elastic member (73) is arranged in multiple and is arranged around the column body part (722).

6. The cell hot press mechanism (100) of claim 4, wherein, The stroke supplement assembly (70) further comprises a guide (74), one side of the fixed plate (71) is provided with a guide column (712) towards the plate body (721), and the guide (74) is connected to the plate body (721) and is in sliding fit with the guide column (712).

7. The cell hot press mechanism (100) of claim 6, wherein, The stroke supplement assembly is provided with two guides, which are arranged on both sides of the column body in the direction perpendicular to the extension direction of the ram, and the fixed plate is provided with two guide columns, which are respectively matched with the two guides.

8. The cell heat press mechanism (100) according to any one of claims 1 to 7, wherein, The rack (10) comprises a base (11), a top plate (12) and a plurality of guide rods (13) connected between the base (11) and the top plate (12), the hot-pressing platform (20) is installed on the top surface of the base (11), the edges of the hot-pressing plate group (40) are in sliding fit with the plurality of guide rods (13), and the first driving member (30) is installed on the top plate (12).

9. The cell hot press mechanism (100) of claim 8, wherein, The hot-pressing plate group (40) comprises a mounting plate (42) and a heating plate (43), the heating plate (43) is installed on the bottom surface of the mounting plate (42), the second driving member (60) and the stroke supplement assembly (70) are installed on the top surface of the mounting plate (42), the edges of the mounting plate (42) are in sliding fit with the plurality of guide rods (13), and the heating plate (43) is arranged in a spaced manner with the plurality of guide rods (13).

10. An electrode sheet processing apparatus characterized by comprising: The electric cell hot-pressing mechanism (100) comprises the electric cell hot-pressing mechanism (100) according to any one of claims 1 to 9.

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