CN218769685U

CN218769685U - Special-shaped cold and hot pressing device

Info

Publication number: CN218769685U
Application number: CN202222361786.2U
Authority: CN
Inventors: 尹敏帅; 李�瑞; 赵志立; 纪影
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2022-06-29
Filing date: 2022-09-06
Publication date: 2023-03-28
Anticipated expiration: 2032-09-06

Abstract

The utility model provides a cold and hot pressing device of abnormal shape, including the lower plate, top board and the lower pressure plate inside that top board and below set up the heating unit respectively, treat that the processing product is located between top board and the lower plate, can relative motion between top board and the lower plate, just relative motion constitutes the pressfitting structure of treating the processing product, and the lower plate sets up the compensation limit structure of treating the processing product respectively towards the both ends of upper plate one side, the both ends of upper plate orientation lower plate one side. A cold and hot pressure equipment of abnormal shape device, at top board, lower plate both sides increase mobilizable slider to the bottom surface of the slider of top board and the top surface of the slider of lower plate have certain inclined plane slope, compensate the thickness difference that the utmost point group cut thin district and middle zone, when top board pushes down to utmost point group or electric core upper surface, guarantee that all regions of pole piece and diaphragm in close contact with carry out the thermal polymerization, promote the consistency of the different regional hardness of utmost point group transportation welding efficiency and electric core.

Description

Special-shaped cold and hot pressing device

Technical Field

The utility model belongs to lithium cell production and processing equipment field especially relates to a cold and hot pressure equipment of abnormal shape device.

Background

Lithium ion batteries are more and more widely applied, lithium ion batteries in the prior art are manufactured by winding or lamination, particularly long lithium ion batteries need to bond a pole piece and a diaphragm together in the manufacturing process and ensure that the pole piece is not deviated in the manufacturing process to cause short circuit of contact between a positive pole and a negative pole, and a common manufacturing method is to closely contact all areas of the pole piece with the diaphragm through cold and hot pressing equipment to carry out thermal polymerization.

At present, cold and hot pressing equipment on the market usually comprises the lower plate, the upper pressure plate comprises the drive element who drives the upper pressure plate and push down, the during operation is downwards by drive element drive upper pressure plate, heat and pressurization are taken place to electric core utmost point group, the diaphragm takes place the thermal polymerization with the pole piece, promote electric core intensity, in prior art's pole piece production, the pole piece has the district of thinning of certain width, this must lead to utmost point group edge to thin partially, when carrying out cold and hot pressing process, the upper pressure plate, the lower plate is parallel straight board, the pressure that utmost point group edge area received and temperature all compare middle zone lessly, it is relatively poor to lead to marginal zone diaphragm and the thermal polymerization bonding effect, reduce utmost point group and transport, the efficiency and the quality of assembly, cause the regional soft partially of finished product electric core both sides, reduce electric core hardness effect.

Disclosure of Invention

In view of this, the utility model aims at providing a cold and hot pressure equipment of abnormal shape is put forward to solve prior art top board, lower plate and be parallel straight board, the middle zone is all compared to pressure and temperature that the polar group edge region received less, leads to the poor problem of edge region diaphragm and the hot polymerization bonding effect of pole piece.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a cold and hot pressing device of abnormal shape, includes that the bottom plate, top board and the bottom plate inside that top board and below set up sets up heating unit respectively, treats that the processing product is located between top board and the bottom plate, can relative motion between top board and the bottom plate, just relative motion constitutes the pressfitting structure of treating the processing product, and the both ends of bottom plate orientation top board one side, top board orientation bottom board one side set up the compensation limit structure of treating the processing product respectively.

Furthermore, a driving unit is arranged at the upper end of the upper pressure plate and drives the pressing structure to move relatively.

Furthermore, the compensation edge structure comprises a sliding block, wherein the sliding block is arranged on two sides of the lower end of the upper pressure plate and two sides of the upper end of the lower pressure plate in a sliding manner, and the lower end of the sliding block is abutted against the outer edge of the product to be processed.

Furthermore, the cross section of the sliding block is of a U-shaped structure, and two side walls of the U-shaped structure are slidably sleeved on two sides of the upper pressing plate or two sides of the lower pressing plate.

Furthermore, two side walls of the U-shaped structure are respectively provided with a first bolting hole, two sides of the upper pressure plate and two sides of the lower pressure plate are respectively provided with a second bolting hole, a lock bolt is arranged in the first bolting hole, and the lock bolt can axially move relative to the first bolting hole so as to be inserted into the second bolting hole to fix the sliding block.

Furthermore, the two sides of the upper end of the upper pressing plate and the two sides of the upper end of the lower pressing plate are respectively provided with a sliding groove, the inner walls of the two sides of the sliding block are respectively provided with a sliding table, and the sliding block is connected into the sliding grooves in a sliding mode through the sliding tables.

Furthermore, the cross section of the sliding chute and the cross section of the sliding table are both polygonal structures.

Furthermore, a plurality of second bolting holes are respectively formed in two sides of the upper pressing plate and two sides of the lower pressing plate, and the second bolting holes are uniformly distributed along the displacement direction of the sliding block.

Furthermore, compensation edge slope surfaces are arranged on the lower end surface of the sliding block positioned on the upper pressing plate and the upper end surface of the sliding block positioned on the lower pressing plate;

the compensation slope surface extends along the width direction of the upper pressing plate or the lower pressing plate;

the compensation edge slope surface of the sliding block positioned on the upper pressure plate is obliquely and upwards arranged towards the center of the upper pressure plate along the length direction of the upper pressure plate; the slope surface of the compensation edge of the sliding block positioned on the lower pressing plate is obliquely and downwards arranged towards the center of the lower pressing plate along the length direction of the lower pressing plate.

Furthermore, the lower end of the upper pressure plate and the upper end of the lower pressure plate are respectively provided with a heat conduction layer.

Compared with the prior art, cold and hot pressure unit of abnormal shape have following beneficial effect:

(1) A cold and hot pressure equipment of abnormal shape device, at top board, lower plate both sides increase mobilizable slider to the bottom surface of the slider of top board and the top surface of the slider of lower plate have certain inclined plane slope, compensate the thickness difference that the utmost point group cut thin district and middle zone, when top board pushes down to utmost point group or electric core upper surface, guarantee that all regions of pole piece and diaphragm in close contact with carry out the thermal polymerization, promote the consistency of the different regional hardness of utmost point group transportation welding efficiency and electric core.

(2) A cold hot pressing device of abnormal shape, a plurality of second bolt connect the hole along the displacement direction equipartition of slider, the fixed of the portable slider of being convenient for this abnormal shape clamp plate adapts to multiple size electric core, extensive applicability is general, ensures that multiple specification utmost point group atress is heated evenly and pole piece and diaphragm bond completely.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural view of a special-shaped cold and hot pressing device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a slider according to an embodiment of the present invention;

fig. 3 is a side view of a slider according to an embodiment of the present invention;

fig. 4 is a side view of a slider according to an embodiment of the present invention;

fig. 5 is a partially enlarged view of a in fig. 4.

Description of reference numerals:

1-an upper pressing plate; 2-pressing the plate; 3-a product to be processed; 4-a drive unit; 5-a slide block; 6-first bolting hole; 7-a second bolting hole; 8-a chute; 9-a sliding table; 10-compensation of the side slope surface; 11-latches.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1-5, a special-shaped cold and hot pressing device comprises an upper pressing plate 1, a lower base plate arranged below the upper pressing plate 1, heating units arranged inside the upper pressing plate 1 and the lower pressing plate 2, a product 3 to be processed positioned between the upper pressing plate 1 and the lower base plate, the upper pressing plate 1 and the lower pressing plate 2 can move relatively, the relative movement forms a pressing structure of the product 3 to be processed, sliders 5 are fixedly arranged on two sides of the lower end of the upper pressing plate 1 and two sides of the upper end of the lower pressing plate 2 respectively, the lower ends of the sliders 5 are in contact connection with an outer edge thinning area of the product 3 to be processed, the lower end surface of each slider 5 is a compensation edge structure of the product 3 to be processed, the sliders 5 with certain inclined slope are additionally arranged on two sides of the upper pressing plate 1 and the lower base plate to compensate for the thickness difference between the thinning area and the middle area of a pole group, and when the upper pressing plate 1 is pressed downwards to the upper surface of the pole group or a battery cell, the product is subjected to uniform pressure and temperature, thereby ensuring that all areas are in close contact with a pole piece for thermal polymerization.

The heating unit comprises a heating plate, the heating plate can select any one of a radiant tube, an electric heating plate or a heating wire, the upper pressing plate 1 and the lower pressing plate 2 are uniformly heated, the electric heating plate is in signal connection with a controller, the controller uses the controller heating temperature controlled by a thermocouple, the lower end of the upper pressing plate 1 and the upper end of the lower pressing plate 2 are respectively provided with a heat conduction layer so as to be uniformly heated, the heat conduction layer can be selected from a silica gel layer, graphene, copper foil, an aluminum alloy plate and the like according to actual requirements, the pressing surface is ensured to be horizontal, the pressing products with the pressing surface are uniformly heated, for different specification sizes of the products to be processed 3, the pressing temperature of the clamping plate is set at 120-160 ℃ for heating, the heating time can be completed within 120-400s, and the lifting height of the upper pressing plate 1 is 200mm.

The upper end of the upper pressure plate 1 is provided with a driving unit 4, the driving unit 4 is the power of the pressing structure, and the driving unit 4 can be any one of a hydraulic push rod, a push rod motor or a push rod cylinder.

The cost of selecting the push rod cylinder that can be very big reduction equipment for use cost, can select to join in marriage the push rod cylinder as drive unit 4 when making product testing machine or carrying out slider 5 reliability test, when making the product that requires relatively high to core package thickness, should select the push rod motor for use as drive unit 4 to ensure product production precision, when more products or mass production of needs pressfitting simultaneously, should select hydraulic push rod for use as drive unit 4 to ensure its pressfitting pressure.

As shown in fig. 2, in order to facilitate the installation of the slider 5 and reduce the occupation space of the slider 5, the cross section of the slider 5 is set to be a U-shaped structure, the two sides of the U-shaped structure can be detachably connected to the two sides of the upper press plate 1 and the two sides of the lower press plate 2, the detachable connection structure can adopt various connection modes, such as clamping, bolting and the like, in this embodiment, the two sides of the U-shaped structure are respectively provided with a first bolting hole 6, the two sides of the upper press plate 1 and the two sides of the lower press plate 2 are respectively provided with a second bolting hole 7, and the periphery of the lock bolt 11 is respectively located in the first bolting holes 6 and the second bolting holes 7, so as to fix the relative positions of the slider 5 and the upper press plate 1 and the lower press plate 2.

In order to facilitate the sliding of the sliding block 5 on the periphery of the upper pressing plate 1 and the lower pressing plate 2, two sides of the upper end of the upper pressing plate 1 and two sides of the upper end of the lower pressing plate 2 are respectively provided with a sliding groove 8, the inner walls of two sides of the sliding block 5 are respectively provided with a sliding table 9, the sliding block 5 is connected into the sliding groove 8 in a sliding manner through the sliding table 9, a worker can push the sliding block 5 to slide along the periphery of the upper pressing plate 1 and the periphery of the lower pressing plate 2 under the condition that the lock bolt 11 is not connected to the second bolting hole 7, the cross section of the sliding groove 8 and the cross section of the sliding table 9 are both in a polygonal structure, so as to ensure the position stability of the sliding block 5, and the primary positioning function is achieved, as shown in fig. 1, the cross section of the sliding table 9 is in a rectangular structure, and the periphery of the sliding table 9 and the inner periphery of the sliding groove 8 are in a mutually matched size.

Both sides of top board 1, the both sides of holding down plate 2 are equipped with a plurality of second bolt and connect hole 7 respectively, and a plurality of second bolt connect hole 7 along the displacement direction equipartition of slider 5, and the fixed of portable slider 5 of being convenient for this abnormal shape clamp plate adapts to multiple size electricity core, and extensive applicability is general, ensures that multiple specification utmost point group atress is heated evenly and pole piece and diaphragm bond completely.

As shown in fig. 3, the lower end surface of the slide block 5 on the upper press plate 1 and the upper end surface of the slide block 5 on the lower press plate 2 are provided with compensation side slopes 10.

The compensation slope 10 extends along the width direction of the upper press plate 1 or the lower press plate 2.

A compensation side slope 10 of a sliding block positioned on the upper pressure plate 1 is obliquely and upwards arranged towards the center of the upper pressure plate 1 along the length direction of the upper pressure plate 1; the compensation edge slope 10 of the slide block 5 on the lower press plate 2 is arranged obliquely downwards towards the center of the lower press plate 2 along the length direction of the lower press plate 2. The slope 10 of the compensation edge is used for compensating the thickness difference between the thinning area of the pole group and the middle area, and when the upper pressing plate 1 is pressed downwards to the upper surface of the pole group or the battery cell, all areas of the pole piece are guaranteed to be in close contact with the diaphragm for thermal polymerization, so that the transfer welding efficiency of the pole group and the consistency of the hardness of different areas of the battery cell are improved.

As shown in fig. 4, the slider 5 is provided with scales. When the cell thinning machine works, a cell or a pole group is arranged between an upper pressing plate 1 and a lower bottom plate, a worker moves a sliding block 5, the position of the sliding block 5 is determined according to the cell thinning area, the sliding block 5 is opposite to the corresponding thinning area, a screwed lock bolt 11 is fixed on a first bolting hole 6 and a second bolting hole 7 at the positions of the upper pressing plate 1 and the lower bottom plate sliding block 5, the upper pressing plate 1 is driven by a driving element to move downwards to the upper surface of the pole group or the cell, and the work is finished after a certain pressure and time are kept.

Slider 5 carries out spacing removal along slip table 9 and the spout 8 that is equipped with on top board 1 and the lower plate, so as to match not unidimensional utmost point group or electric core, the scale is the thickness compensation value on the slider 5, cut thin district and middle zone thickness difference according to electric core and confirm the thickness compensation value, slider 5 slides to and uses bolt fastening slider 5 behind this value, this pressure equipment is equipped with a plurality of sliders 5 of different slopes when using, the district thickness difference's electric core or utmost point group are cut to the corresponding difference, the staff can select according to the use operating mode of difference, the heat-conducting layer that top board 1 below and lower plate top set up can make electric core or utmost point group thermally equivalent, protect utmost point group or electric core outward appearance simultaneously, reach insulating effect.

The working process of the special-shaped cold and hot pressing device is as follows:

as shown in fig. 4-5, the driving element is a push rod cylinder, the upper platen 1 and the lower platen heating device are electric heating plates, the heat conducting layer is a silica gel layer, the size of the pole group to be cooled and heated is L =513mm, the sliding block 5 is moved along the upper platen 1 and the lower platen sliding rail until the scale of the sliding block 5 is H =0.3mm, at this time, the size of the area corresponding to the pole group of the sliding block 5 is B =6mm, the lock bolt 11 is fixed to the first latching hole 6 and the second latching hole 7 of the upper platen 1 and the lower platen through the sliding block 5, the operator opens the upper platen 1 and the lower platen heating plate of the controller to start working, after the temperature rises to a set value, the cylinder acts downward on the upper platen 1, the upper platen 1 presses to the upper surface of the pole group and maintains for a period of time, and after the working, the cylinder pulls the upper platen 1 upward to an initial position.

The positive plate and the diaphragm bonding effect ideal after disassembling the utmost point group, positive plate and diaphragm exist certain cohesive force and pole piece surface micelle and distribute evenly, contrast traditional cold and hot pressure equipment, the regional micelle of district is cut to the positive plate of utmost point group of cold and hot pressure equipment operation of dysmorphism distributes evenly, and the utmost point group is cut to thin the regional micelle of district and is had better hardness simultaneously, does benefit to utmost point group welding and transportation efficiency, promotes the regional electric core hardness in electric core both sides.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A heterotypic cold and hot pressure device which characterized in that: the processing device comprises an upper pressing plate, a lower bottom plate, an upper pressing plate and a lower pressing plate, wherein heating units are arranged in the upper pressing plate, the lower bottom plate, the upper pressing plate and the lower pressing plate which are arranged below the upper pressing plate respectively, a product to be processed is located between the upper pressing plate and the lower bottom plate, the upper pressing plate and the lower pressing plate can move relatively, the relative movement forms a pressing structure of the product to be processed, and compensation edge structures of the product to be processed are arranged at two ends of the lower bottom plate, facing one side of the upper bottom plate, and at two ends of the upper bottom plate, facing one side of the lower bottom plate respectively.

2. A profiled cold and hot press apparatus as claimed in claim 1, wherein: and the upper end of the upper pressure plate is provided with a driving unit which drives the pressing structure to move relatively.

3. A cold and hot profiled pressing apparatus as claimed in claim 1, wherein: the compensation edge structure comprises a sliding block, wherein the sliding block is arranged on two sides of the lower end of the upper pressing plate and two sides of the upper end of the lower pressing plate in a sliding mode respectively, and the lower end of the sliding block is abutted against the outer edge of the product to be processed.

4. A cold and hot profiled pressing apparatus as claimed in claim 3, wherein: the cross section of the sliding block is of a U-shaped structure, and two side walls of the U-shaped structure are slidably sleeved on two sides of the upper pressing plate or two sides of the lower pressing plate.

5. A cold and hot profiled pressing apparatus as claimed in claim 4, wherein: and two side walls of the U-shaped structure are respectively provided with a first bolting hole, two sides of the upper pressure plate and two sides of the lower pressure plate are respectively provided with a second bolting hole, a lock bolt is arranged in the first bolting hole, and the lock bolt can axially move relative to the first bolting hole so as to be inserted into the second bolting hole to fix the sliding block.

6. A profiled cold and hot press apparatus as claimed in claim 3, wherein: the upper end both sides of top board, the upper end both sides of holding down plate are equipped with a spout respectively, and a slip table is installed respectively to the both sides inner wall of slider, and the slider passes through in slip table sliding connection to spout.

7. A profiled cold and hot press arrangement as claimed in claim 6, wherein: the cross section of the sliding chute and the cross section of the sliding table are both polygonal structures.

8. A cold and hot profiled pressing apparatus as claimed in claim 5, wherein: and a plurality of second bolting holes are respectively arranged on two sides of the upper pressure plate and two sides of the lower pressure plate, and are uniformly distributed along the displacement direction of the slide block.

9. A cold and hot profiled pressing apparatus as claimed in claim 3, wherein: the lower end surface of the sliding block positioned on the upper pressing plate and the upper end surface of the sliding block positioned on the lower pressing plate are provided with compensating side slope surfaces;

10. A cold and hot profiled pressing apparatus as claimed in claim 1, wherein: the lower end of the upper pressure plate and the upper end of the lower pressure plate are respectively provided with a heat conduction layer.