CN217955942U - Pre-shaping device, press-down shaping device and battery cell shaping device - Google Patents

Abstract

The utility model relates to a battery processing equipment technical field provides a shaping device in advance, pushes down shaping device and electric core shaping device. The pre-shaping device comprises a battery cell shaping disc, wherein the battery cell shaping disc is provided with a bearing surface, the bearing surface is divided into a first bearing area, a second bearing area and a third bearing area, the first bearing area and the third bearing area are oppositely arranged along a first direction, the second bearing area is positioned between the first bearing area and the second bearing area, and the second bearing area is arc-shaped; and the second bearing area exceeds the first bearing area and the third bearing area along the direction vertical to the bearing surface, and is used for supporting and shaping the middle part of the battery cell. This shaping device bears the weight of the region through the second that sets up on the shaping dish of electric core and be the arc, can provide the support for coiling back electric core middle part to let laminating closely not have the pine between electric core layer and the layer and take off, thereby improve negative pole piece fold problem, with the roughness that promotes follow-up gained pole piece after carrying on technologies such as hot pressing.

Description

Pre-shaping device, press-down shaping device and battery cell shaping device

Technical Field

The utility model relates to a battery processing equipment technical field especially relates to a shaping device in advance, pushes down shaping device and electric core shaping device.

Background

At present, with the application of a large number of lithium batteries, the requirement for rate charging and discharging of the lithium ion batteries is higher and higher, and when battery manufacturers pursue higher rate charging and discharging, the aim is often achieved by reducing the surface density of a pole piece and the thickness of a current collector. However, the reduction of the surface density of the pole piece and the thickness of the current collector brings the problem of the wrinkle of the positive and negative pole pieces, and is especially common in the battery with a ternary material winding structure.

Specifically, the wrinkle of the pole pieces occurs from the winding process, the pole pieces are U-shaped after the positive and negative pole pieces are wound due to the release of tension of the inner rings and the influence of gravity, and the U-shaped positive and negative pole pieces cannot be completely unfolded in the hot pressing process, so that wrinkles are formed. The serious wrinkles of the pole pieces can pierce the diaphragm to cause short circuit, so that the burning risk exists; the slight wrinkles of the pole pieces can generate a lithium precipitation phenomenon in the battery cycle process, and the cycle life of the battery is further influenced.

Therefore, how to solve the problem of the pole piece wrinkles of the battery is a technical problem which needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model provides a shaping device, push down shaping device and electric core shaping device in advance to promote the roughness of pole piece, and, promote the product yield.

In order to achieve the above purpose, the utility model provides a following technical scheme:

according to the utility model discloses a first aspect provides a pre-shaping device, include: electric core shaping dish, electric core shaping dish has the loading end, the loading end divides into first bearing area, second bearing area and third bearing area, wherein:

the first bearing area and the third bearing area are arranged oppositely, and the arrangement direction of the first bearing area and the third bearing area forms a first direction;

along the first direction, the second bearing area is positioned between the first bearing area and the second bearing area, and the second bearing area is arc-shaped; and along the direction vertical to the bearing surface, the second bearing area exceeds the first bearing area and the third bearing area, and is used for supporting and shaping the middle part of the battery cell.

When the pre-shaping device provided by the application is applied, the wound battery cell can be arranged on the bearing surface of the battery cell shaping disc in the pre-shaping device provided by the application. Because along the first direction, curved second bears the weight of the area and is located between first bearing area and the third bearing area, and along perpendicular bearing surface direction, the second bears the weight of the area and surpasss first bearing area and second and bears the weight of the area, so curved second bears the weight of the area and can butt in the fluffy middle part of battery, and at this moment, electric core both sides receive the influence of gravity to overlap joint respectively on first bearing area and third bearing area.

Specifically, when the battery cell is arranged on the bearing surface of the battery cell shaping disc, the whole battery cell forms an inverted U-shaped structure with a downward opening. It should be noted that the inverted U-shaped structure can counteract the U-shaped structure formed by the cells themselves bulging upward in the middle after stacking, so as to counteract the influence of internal stress and gravity of the cells, so that the pole pieces are at least partially unfolded in the first direction.

It should be noted that the second of the shaping device in advance that this application provided bears the weight of the region through setting up on the shaping dish of electric core is the arc, can provide the support for coiling back electric core middle part to let laminating closely not have the pine between electric core layer and the layer and take off, thereby improve negative pole piece fold problem, with the roughness that promotes follow-up gained pole piece after carrying on technologies such as hot pressing, promote product yield and life.

According to the utility model discloses a second aspect provides a push down shaping device for use with the shaping device cooperation in advance in the arbitrary technical scheme that provides as in the above-mentioned first aspect, push down shaping device includes: the battery cell pre-shaping device comprises a support and a lower pressing plate, wherein the lower pressing plate can be movably arranged on the support along the direction vertical to a bearing surface in the pre-shaping device, the lower pressing plate is provided with a pressing station and a lifting station, and when the lower pressing plate is positioned at the pressing station, the lower pressing plate is used for pressing the battery cell on the bearing surface.

The application provides a push down the device and can carry out the pre-compaction through the clamp plate down to the electric core of placing on the loading end, and is concrete, the clamp plate down that is in the station pushes down carries out the pre-compaction to the electric core of placing on electric core plastic dish, make the middle part of electric core supported and press on the arcwall face of arc, the arc provided the support to giving coiling back electric core middle part this moment, in order to let laminating closely not have the pine between electric core layer and the layer and take off, thereby improve negative pole piece fold problem, in order to promote the subsequent roughness of obtaining pole piece after carrying out technologies such as hot pressing, promote product yield and life.

According to the utility model discloses a third aspect provides a battery cell shaping equipment, include the shaping device in advance in the arbitrary technical scheme that provides as in the above-mentioned first aspect and the shaping device that pushes down in the arbitrary technical scheme that provides as in the above-mentioned second aspect.

The application provides an electricity core plastic equipment pushes down the shaping device in including the pre-shaping device in the first aspect and the second aspect, it is concrete, push down the device and can carry out the pre-compaction to the electric core of placing on pre-shaping device internal load face through pushing down the clamp plate, make the middle part of electric core supported and press on the arcwall face of arc, the arc is to providing the support for coiling back electricity core middle part this moment, so that laminate closely not have the pine and take off between electric core layer and the layer, thereby improve negative pole piece fold problem, with the roughness of promotion follow-up gained pole piece after carrying out processes such as hot pressing, promote product yield and life.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

fig. 1 is a schematic structural diagram of a pre-shaping device according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of the cell shaping disk in fig. 1;

FIG. 3 is a schematic view of the structure of the arcuate plate of FIG. 2;

FIG. 4 is a cross-sectional view of the arcuate plate of FIG. 3;

fig. 5 is a schematic structural diagram of a pressing device provided in the embodiment of the present application when clamping a battery cell;

fig. 6 is a schematic structural diagram of a pressing device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a pressing device at a further angle according to an embodiment of the present disclosure.

The reference numerals are illustrated below:

100. battery core shaping disc; 110. a shaping disk body; 111. mounting a bump; 112. a grabbing port; 120. an arc-shaped plate; 121. mounting grooves; 200. a support; 300. pressing the plate downwards; 310. a plate body; 320. shaping and pressing blocks; 400. a clamping jaw; 500. a drive mechanism; 510. a cylinder body; 520. a piston rod; 600. a buffer assembly; 610. an elastic buffer member; 620. a fixing plate; 700. a side plate; 01. an electric core; 011. a cell body; 012. a tab; s1, a first bearing area; s2, a second bearing area; s3, a third bearing area.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in the context of a connection between one element or feature and another element(s), "on," "under," or "inside" or "outside," it can be directly connected to the other element(s) "on," "under" or "inside" or "outside," or indirectly connected to the other element(s) "on," "under" or "inside" or "outside" through intervening elements.

In order to clearly understand the pre-shaping device provided in the embodiment of the present application, an application scenario is introduced first, and the pre-shaping device is used for pre-shaping the battery cell. Electric core is piling up the back, and both sides are comparatively tight real, and the middle part is regional comparatively fluffy, and when smooth tray was arranged in to electric core, a plurality of pole pieces were being located the regional density of piling up in middle part relatively poor for the middle part of whole electric core upwards expands, and whole electric core demonstrates the U-shaped structure, and this structure can influence technological operation such as follow-up hot pressing, makes the electric core roughness that the preparation becomes relatively poor, influences the product yield even.

Therefore, in a first aspect, embodiments of the present application provide a pre-shaping device. As shown in fig. 1, the pre-shaping device includes: battery cell shaping disk 100, battery cell shaping disk 100 have a bearing surface, the bearing surface is divided into a first bearing area S1, a second bearing area S2 and a third bearing area S3, wherein:

the first bearing area S1 and the third bearing area S3 are arranged oppositely, and the arrangement directions of the first bearing area S1 and the third bearing area S3 form a first direction;

along the first direction, the second bearing area S2 is positioned between the first bearing area S1 and the second bearing area S2, and the second bearing area S2 is arc-shaped; along the direction perpendicular to the carrying surface, the second carrying area S2 exceeds the first carrying area S1 and the third carrying area S3, and the second carrying area S2 is used for supporting and shaping the middle portion of the cell 01 (as shown in fig. 5).

When the pre-shaping device provided in the embodiment of the present application is applied, the wound battery cell 01 may be placed on the bearing surface of the battery cell shaping disc 100 in the pre-shaping device provided in the embodiment of the present application. Because along the first direction, the arc-shaped second bearing area S2 is located between the first bearing area S1 and the third bearing area S3, and along the direction perpendicular to the bearing surface, the second bearing area S2 exceeds the first bearing area S1 and the second bearing area S2, so the arc-shaped second bearing area S2 protrudes upward and can be abutted against the fluffy middle part of the battery, at this time, two sides of the battery cell 01 are respectively overlapped on the first bearing area S1 and the third bearing area S3 under the influence of gravity.

Specifically, when the battery cell 01 is placed on the carrying surface of the battery cell shaping tray 100, the whole battery cell 01 may form an inverted U-shaped structure with an opening facing downward, and the shape of the battery cell 01 on the battery cell shaping tray 100 is shown by a dotted line in fig. 1. It should be noted that the inverted U-shaped structure can counteract the U-shaped structure formed by the cells 01 themselves bulging upwards in the middle after stacking, so as to counteract the influence of internal stress and gravity of the cells 01, so that the pole pieces are unfolded at least partially in the first direction.

It should be noted that the pre-shaping device provided in the embodiment of the present application is arc-shaped by setting the second bearing area S2 on the electrical core shaping disc 100, and can provide support for the middle of the coiled electrical core 01, so as to allow the electrical core 01 to be tightly attached to the layers without loosening, thereby improving the wrinkle problem of the negative electrode plate, improving the flatness of the obtained electrode plate after the subsequent processes such as hot pressing, and improving the yield and the service life of the product.

It should be understood that the pre-shaping device provided in the embodiment of the present application may be used between the winding process and the hot pressing process, and in the process of transferring the battery cell 01, the battery cell 01 is placed on the carrying surface to shape the battery cell 01, and before the hot pressing process, the battery cell 01 is placed on the carrying surface to pre-shape the battery cell 01.

Certainly, the pre-shaping device provided in the embodiment of the present application may further cooperate with a pressing device to pre-press the battery core 01 placed on the bearing surface. Even, the electric core 01 on the bearing surface can be hot-pressed and shaped by directly adopting hot-pressing equipment; it is noted that in this process, hot pressing and shaping are performed simultaneously.

In one embodiment, with continued reference to the structure shown in fig. 1, the cell shaping disk 100 includes a shaping disk body 110 and an arc plate 120, wherein the arc plate 120 is installed on one side of the shaping disk body 110;

one side of the arc-shaped plate 120 departing from the shaping disc body 110 is an arc-shaped surface, and the arc-shaped surface forms a second bearing area S2;

the shaping disk body 110 is provided with a first bearing area S1 and a third bearing area S3 formed by the area of one side surface of the arc-shaped plate 120 which is not covered by the arc-shaped plate 120.

It should be understood that the shaping disk body 110 and the arc-shaped plate 120 in the battery cell shaping disk 100 may be separately prepared and then assembled together to meet the structural requirements of each part, thereby improving the shaping effect of the battery cell shaping disk 100 on the battery cell 01. Of course, the shaping disk body 110 and the arc-shaped plate 120 can also be integrally prepared to simplify the preparation process, for example, the shaping disk body 110 and the arc-shaped plate 120 can be simultaneously formed by injection molding, or the arc-shaped plate 120 can also be injection molded on the already prepared shaping disk body 110.

In a specific embodiment, the shaping disk body 110 shown in fig. 2 has a shaping cavity, the arc plate 120 shown in fig. 3 is mounted in the shaping cavity, and the portions of the bottom wall of the shaping cavity not covered by the arc plate 120 form the first bearing region S1 and the third bearing region S3.

It should explain that, whole shape chamber lateral wall can be put electric core 01 week side of inside and spacing, can guarantee on the one hand that electric core 01 places in place, and on the other hand can guarantee that electric core 01 can not take place the displacement at the plastic in-process to can promote the plastic effect to electric core 01.

It should be noted that the depth and structure of the shaping cavity can be set according to the requirement, and are not described herein again.

In one embodiment, the arcuate plate 120 is removably coupled to the cosmetic disc body 110.

It is worth noting that the detachable structure arrangement can improve the application scenario of the pre-shaping device provided by the embodiment of the present application, so that the battery cell shaping disc 100 can shape various battery cells 01. Specifically, when using the shaping device in advance that this application embodiment provided, can change the arc 120 of adaptation according to electric core 01's size and the middle part tatami condition down to offset the influence of electric core 01 internal stress and gravity better, so that laminate closely not have the pine and take off between electric core 01 layer and the layer, thereby improve negative pole piece fold problem, with the roughness that promotes follow-up gained pole piece after carrying on technologies such as hot pressing, promote the product yield.

In one embodiment, with continued reference to the structure shown in fig. 1 to 3, a limiting structure is disposed between the arc plate 120 and the shaping cavity, and the limiting structure is used for limiting the relative position between the arc plate 120 and the shaping cavity.

It should be noted that, limit structure can promote the precision of arc 120 and the assembly of plastic chamber within a definite time, avoids electric core 01 to put into the plastic chamber or carry out the plastic operation to electric core 01, and relative displacement takes place for the relative plastic chamber of arc 120 to promote the plastic effect of arc 120 to electric core 01.

It should be noted that there are many possible arrangements of the position-limiting structure, at least one of the following structures.

In one embodiment, please continue to refer to the structure shown in fig. 1 to 3, the limiting structure includes a mounting groove 121 and a mounting protrusion 111, wherein:

the mounting lug 111 is arranged on the inner wall of the shaping cavity;

the mounting groove 121 is provided at an end of the arc plate 120, and the mounting groove 121 is detachably mounted on the mounting protrusion 111.

Specifically, during assembly, the mounting grooves 121 of the arc-shaped plate 120 can be aligned with the mounting protrusions 111 to accurately mount the arc-shaped plate 120 into the shaping cavity. It should be appreciated that the mounting protrusion 111 limits the arcuate plate 120 in the first direction to improve the accuracy of the assembly between the arcuate plate 120 and the shaping cavity.

In addition, the mounting protrusion 111 may also separate the positive tab 012 and the negative tab 012 led out from the same side of the battery cell 01, so as to ensure that the battery cell 01 is accurately placed in the shaping cavity. The mounting projections 111 are equivalent to separating the positive electrode tab 012 and the negative electrode tab 012 into different small cavities, so that the positive electrode tab 012 and the negative electrode tab 012 can be prevented from being short-circuited in the shaping process, and the product yield of the shaped battery cell 01 can be further improved.

In one specific embodiment, for example, as shown in fig. 3, the mounting groove 121 is located at the end of the arc plate 120, and the mounting groove 121 has an opening on the arc surface of the arc plate 120 along the direction perpendicular to the bearing surface. It should be understood that when assembling, if the bearing surface is taken as a horizontal plane, the arc-shaped plate 120 can be directly placed into the shaping cavity along the vertical direction.

Of course, the mounting groove 121 may also be opened only at the bottom and the end of the arc plate 120, and may be specifically set as required, which is not described herein again.

In addition, it is worth noting that a plurality of corresponding limiting structures can be arranged between the arc-shaped plate 120 and the side wall of the shaping cavity so as to improve the limiting effect, and the limiting structures can be specifically arranged according to requirements.

In another embodiment, the mounting groove 121 may be disposed on the inner wall of the shaping cavity, and the mounting protrusion 111 may be disposed on the arc plate 120, which will not be described in detail.

In an embodiment, in the pre-shaping device provided in this embodiment of the present application, an auxiliary fixing structure may be further disposed between the arc plate 120 and the shaping disk body 110, so as to fix the arc plate 120 and the shaping disk body 110 in a vertical direction in a bidirectional manner. Illustratively, a double-sided tape or a glue may be applied to the bottom of the arc-shaped plate 120. Of course, the auxiliary fixing structure can be selected as other structures according to the requirement, and details are not repeated.

In one embodiment, the shaping plate body 110 is provided with at least one grabbing port group, and with continued reference to the structure shown in fig. 2, the grabbing port group includes two grabbing ports 112 oppositely arranged along a first direction; each grasping aperture 112 extends from a side wall of the shaping cavity to a bottom wall of the shaping cavity.

Illustratively, as shown in fig. 2, each of the grasping openings 112 is L-shaped, the transfer structure such as a clamping jaw 400 can extend into the bottom of the cell 01 from the portion of the grasping opening 112 located on the bottom wall of the shaping cavity (as shown by the dashed arrow parallel to the first direction in fig. 2), and the transfer structure such as a clamping jaw 400 can move the cell 01 out of the shaping cavity from the portion of the grasping opening 112 located on the side wall of the shaping cavity (as shown by the dashed arrow perpendicular to the first direction in fig. 2). On the contrary, when the battery cell 01 needs to be placed into the shaping cavity, the battery cell 01 can be moved into the shaping cavity from the portion of the gripping opening 112 located on the side wall of the shaping cavity by using the transferring structures such as the clamping jaw 400, and then the shaping cavity is withdrawn from the portion of the gripping opening 112 located on the bottom wall of the shaping cavity by using the transferring structures such as the clamping jaw 400.

It should be noted that, by arranging the grabbing port group on the shaping disc body 110, the electric core 01 can be conveniently moved into or out of the shaping cavity, so that the shaping operation can be simplified, and the shaping efficiency can be improved.

It is noted that the plurality of gripping openings of the orthopaedic disc body 110 may be one or more. It should be understood that, of course, when the plurality of groups of grabbing ports are formed in the shaping tray body 110, the plurality of clamping jaws 400 may be placed in the corresponding grabbing ports 112, so as to lift or grab the battery cell 01 by the plurality of clamping jaws 400, thereby improving the smoothness of the transportation structure such as a clamp during transportation.

In one embodiment, the ratio of chord height to chord length of the arc is 3:20 to 5:20. it is to be understood that this ratio range may also be expressed as 0.15 to 0.25. Illustratively, as shown in fig. 4, the arc-shaped surface has a chord height H of 15mm and a chord length L of 60mm.

It should be noted that the chord height H and the chord length L are designed according to the U-shaped size of the wound battery cell 01 when standing still, and the U-shaped lower couch degree of the pole piece of the battery cell 01 is different, so that different arc-shaped plates 120 can be designed.

It should be noted that, the ratio of the chord length to the chord length through setting up the arcwall face is above-mentioned scope, can adapt to the electric core 01 of various sizes to for the electric core 01 middle part provides effective support after coiling, let the laminating closely not have the pine to take off between electric core 01 layer and the layer, thereby improve negative pole piece fold problem, with promote the follow-up roughness to the pole piece that obtains after electric core 01 carries out processes such as hot pressing, promote the product yield.

In a second aspect, embodiments of the present application provide a push-down shaping device. Referring to the arrangements shown in fig. 5 to 7, the push-down shaping device provides a push-down shaping device for use with a pre-shaping device according to any of the aspects provided in the first aspect above, the push-down shaping device comprising: support 200 and holding down plate 300, holding down plate 300 can be installed in support 200 along bearing surface direction removal in the perpendicular plastic device in advance, and holding down plate 300 has the station of pushing down and rises the station, and when holding down plate 300 was in the station of pushing down, holding down plate 300 was used for supporting electric core 01 and presses on the bearing surface.

It should be noted that, after the cells 01 are stacked, the U-shaped structure formed by bulging the middle part upwards can be offset or even disappear after being pressed down by the shaping device and pre-shaped by the pre-shaping device, so that the pole pieces are at least partially unfolded in the first direction.

It should be noted that the pushing device provided by the embodiment of the present application can pre-press the electric core 01 placed on the bearing surface through the pushing plate 300, specifically, the pushing plate 300 at the pushing station pre-presses the electric core 01 placed on the electric core shaping disc 100, so that the middle part of the electric core 01 is pressed on the arc-shaped surface of the arc-shaped plate 120, at this moment, the arc-shaped plate 120 supports the middle part of the electric core 01 after winding, so as to make the electric core 01 layers tightly fit with each other without loosening, thereby improving the wrinkle problem of the negative electrode plate, so as to improve the flatness of the obtained pole piece after the subsequent processes such as hot pressing, and improve the product yield and the service life.

In one embodiment, referring to the structure shown in fig. 5 to 7, the lower pressing plate 300 includes a plate body 310 and a shaping pressing block set, the shaping pressing block set is disposed on one side of the plate body 310, and the shaping pressing block set includes two shaping pressing blocks 320 disposed oppositely along a first direction;

when the lower pressing plate 300 is located at the pressing station, one of the two shaping pressing blocks 320 is used for pressing the battery cell 01 in the first bearing area S1 of the bearing surface, and the other of the two shaping pressing blocks 320 is used for pressing the battery cell 01 in the third bearing area S3 of the bearing surface.

Illustratively, during the pre-pressing of the lower platen 300: at least one shaping block presses the cell 01 located in the first bearing area S1 of the bearing surface, at least one shaping block presses the cell 01 located in the third bearing area S3 of the bearing surface, and even the plate body 310 presses the cell 01 located in the second bearing area S2.

It should be noted that, in the process that the lower pressing plate 300 is switched from the ascending station to the descending station, each part of the battery cell 01 is pressed, so that the posture of the pre-pressed battery cell 01 can be further improved, and the subsequent hot pressing or other processes can be conveniently performed, thereby improving the yield of the finally prepared battery cell 01.

In one embodiment, plate body 310 conforms to the shape of the reforming cavity in the direction perpendicular to the bearing surface, and when lower platen 300 is at the pressing down station, plate body 310 may be placed into the reforming cavity.

It should be noted that, the shape of the plate body 310 is adapted to the shape of the shaping cavity, so that interference between the lower pressing plate 300 and the side wall of the shaping cavity when the lower pressing plate is switched between the lower pressing station and the upper pressing station can be avoided, and therefore it can be ensured that the lower pressing plate 300 effectively shapes the battery cell 01.

In one embodiment, referring to the structures shown in fig. 5 to 7, the pressing device provided by the embodiment of the present application further includes a clamping jaw 400, the clamping jaw 400 is movably mounted on the bracket 200 along a first direction, the clamping jaw 400 has a gripping station and a standby station, and when the clamping jaw 400 is at the gripping station, the clamping jaw 400 can be inserted into the bottom of the shaping cavity from the gripping opening 112 of the pre-shaping device; when the clamping jaw 400 is at the second station, the clamping jaw 400 avoids the cell shaping disk 100.

Illustratively, as shown in fig. 6 and 7, each of the grasping openings 112 is L-shaped, the transfer structures such as the clamping jaws 400 can extend into the bottom of the battery cell 01 from the portion of the grasping opening 112 located on the bottom wall of the shaping cavity, and the transfer structures such as the clamping jaws 400 can move the battery cell 01 out of the shaping cavity from the portion of the grasping opening 112 located on the side wall of the shaping cavity. On the contrary, when the battery cell 01 needs to be placed into the shaping cavity, the battery cell 01 can be moved into the shaping cavity from the portion of the gripping opening 112 located on the side wall of the shaping cavity by using the transferring structures such as the clamping jaw 400, and then the shaping cavity is withdrawn from the portion of the gripping opening 112 located on the bottom wall of the shaping cavity by using the transferring structures such as the clamping jaw 400.

It is worth noting that the lower pressing plate 300 is switched between the lifting station and the pressing station, and the clamping operation of the clamping jaw 400 can be matched, and the lower pressing plate can be specifically arranged according to requirements.

Illustratively, when the downward pressing and shaping device places the wound battery cell 01 on the battery cell shaping disc 100, the clamping jaws 400 are firstly released, then the downward pressing plate 300 presses the battery cell 01, and the shaping pressing blocks 320 abut against two sides of the top surface of the battery cell 01; when pushing down shaping device and getting material from electric core shaping dish 100, holding down plate 300 pushes down electric core 01, and shaping briquetting 320 supports the both sides of electric core 01 top surface, and simultaneously, clamping jaw 400 takes out electric core 01 from electric core shaping dish 100 and gets into the hot pressing process to guarantee the shape of falling the U in the transfer process.

In particular mounting of the clamping jaw 400, there are a number of possible settings: in one particular arrangement, the jaws 400 are secured to the side plate 700 using screws, and the side plate 700 is movably mounted to the bracket 200 in a first direction. Specifically, a sliding rail assembly is arranged between the side plate 700 and the support 200, the side plate 700 is connected with a translation cylinder, and the translation cylinder drives the side plate 700 and the clamping jaw 400 to move left and right.

In addition, it should be noted that the entire support 200 can move in the vertical direction to drive the clamping jaw 400 and the lower pressing plate 300 to move in the vertical direction synchronously, so as to realize the movement operation of the battery cell 01 between different processes. Illustratively, the support 200 is movably secured to the robotic arm.

In one embodiment, referring to the structures shown in fig. 5 to 7, the pressing device provided in the embodiment of the present application further includes a driving mechanism 500, the driving mechanism 500 is mounted on the bracket 200, and an output end of the driving mechanism 500 is connected to the pressing plate 300 for driving the pressing plate 300 to switch between the pressing station and the lifting station.

In one embodiment, referring to the structure shown in fig. 5 to 7, the driving mechanism 500 includes: a cylinder comprising a cylinder body 510 and a piston rod 520, wherein:

the cylinder 510 is fixed relative to the bracket 200;

the output end of the piston rod 520 extends out of the cylinder 510, and the output end of the piston rod 520 is connected with one side of the plate body 310, which is far away from the shaping press block 320.

It will be appreciated that the piston rod 520 extends beyond one end of the cylinder 510 as the output end of the air cylinder. Specifically, the piston rod 520 of the air cylinder can reciprocate relative to the cylinder body 510; when the piston rod 520 reciprocates, the piston rod 520 drives the lower pressing plate 300 to switch between the ascending station and the descending station.

The structural arrangement of the driving structure is not limited to this, and other devices may be used to drive the lower platen 300. For example, the driving structure may include a motor and other transmission structures, which are not described in detail herein.

In one embodiment, please refer to the structures shown in fig. 5 to fig. 7, the pressing device provided in the embodiment of the present application further includes a buffering assembly 600, the buffering assembly 600 includes an elastic buffer 610 and a fixing plate 620, the fixing plate 620 is fixed relative to the bracket 200, the fixing plate 620 is disposed on a side of the plate body 310 away from the shaping press block 320, the cylinder 510 is mounted on the fixing plate 620, and the piston rod 520 penetrates out of the fixing plate 620 and connects with the plate body 310; the elastic buffer 610 is disposed between the fixing plate 620 and the plate body 310, and when the pressing plate 300 is at the pressing station, the elastic buffer 610 is in an energy storage state.

Specifically, the driving mechanism 500 starts the pressing-down action, and the pressing-down plate 300 gradually switches the pressing-down stations; certainly, after the pressing plate 300 is located at the pressing station, the elastic buffer 610 is compressed to be deformed fixedly, and the phenomenon that the battery cell 01 is damaged due to the fact that the pressing force of the pressing plate 300 is too large can be effectively prevented from occurring by the elastic buffer 610, so that the battery cell 01 can be well shaped.

Illustratively, the elastic buffer 610 may be a spring. It is noted that, for the purpose of enhancing stability, a plurality of elastic buffers 610 may be disposed between the lower pressing plate 300 and the fixing plate 620, and for example, 4 elastic buffers 610 are disposed in fig. 6 and 7. Of course, the number of the elastic buffers 610 may be other, and will not be described herein.

In a third aspect, there is provided a battery cell 01 shaping apparatus, including the pre-shaping device in any of the technical solutions provided in the first aspect and the push-down shaping device in any of the technical solutions provided in the second aspect.

It should be noted that the electric core 01 shaping equipment provided by the embodiment of the present application includes the pre-shaping device in the first aspect and the pressing-down shaping device in the second aspect, and specifically, the pressing-down device can pre-press the electric core 01 placed on the bearing surface in the pre-shaping device through the pressing-down plate 300, so that the middle part of the electric core 01 is pressed against the arc-shaped surface of the arc-shaped plate 120, and at this time, the arc-shaped plate 120 provides support for the middle part of the wound electric core 01, so that the electric core 01 is tightly attached to the layers without loosening, thereby improving the wrinkle problem of the negative electrode plate, improving the flatness of the obtained electrode plate after the subsequent processes such as hot pressing, and improving the yield of the product and the service life.

For clarity of describing the cell 01 shaping device provided in the embodiment of the present application, for example, please refer to fig. 1 to fig. 7, an operation description is provided:

1. manually or with a clamping jaw 400, placing a cell 01 in the cell shaping tray 100;

2. the arc-shaped second bearing area S2 provides a supporting force for the middle part of the wound battery cell 01, so that the layers of the battery cell 01 are tightly attached without loosening;

3. the cell shaping disc 100 is transferred to a hot pressing process along a production line;

4. the clamping jaw 400 is opened, the whole clamping jaw 400 moves to the position of the battery cell 01, the lower pressing plate 300 is pressed to the position right above the battery cell 01, and the battery cell 01 is pressed out of a U shape;

5. the clamping jaw 400 is locked under the action of the cylinder, clamps the battery cell 01 and moves to the hot-pressing cavity, and the battery cell 01 can also ensure the close fit state between layers in the moving process.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (15)

1. A pre-shaping device, comprising: electric core shaping dish, electric core shaping dish has the loading end, the loading end divides into first bearing area, second bearing area and third bearing area, wherein:

the first bearing area and the third bearing area are arranged oppositely, and the arrangement direction of the first bearing area and the third bearing area forms a first direction;

along the first direction, the second bearing area is positioned between the first bearing area and the second bearing area, and the second bearing area is arc-shaped; and the second bearing area exceeds the first bearing area and the third bearing area along the direction vertical to the bearing surface, and is used for supporting and shaping the middle part of the battery cell.

2. The pre-shaping device of claim 1, wherein the cell shaping disk comprises a shaping disk body and an arc-shaped plate, and the arc-shaped plate is mounted on one side of the shaping disk body;

one side of the arc-shaped plate, which is far away from the shaping disc body, is an arc-shaped surface, and the arc-shaped surface forms the second bearing area;

the shaping disc body is installed on one side surface of the arc-shaped plate, and the area which is not covered by the arc-shaped plate forms the first bearing area and the third bearing area.

3. The pre-shaping device according to claim 2, wherein the shaping disk body has a shaping cavity, the arc-shaped plate is installed in the shaping cavity, and the portion of the bottom wall of the shaping cavity which is not covered by the arc-shaped plate forms the first bearing region and the third bearing region.

4. The pre-shaping device of claim 3 wherein said arcuate plate is removably attached to said shaping disk body.

5. The pre-shaping device according to claim 4, wherein a limiting structure is arranged between the arc-shaped plate and the shaping cavity, and the limiting structure is used for limiting the relative position of the arc-shaped plate and the shaping cavity; the limit structure comprises a mounting groove and a mounting lug, wherein:

the mounting lug is arranged on the inner wall of the shaping cavity;

the mounting groove is arranged at the end part of the arc-shaped plate, and the mounting groove is detachably mounted on the mounting lug.

6. The pre-shaping device according to claim 5, wherein the shaping plate body is provided with at least one grabbing port group, the grabbing port group comprising two grabbing ports oppositely arranged along the first direction; each grabbing opening extends from the side wall of the shaping cavity to the bottom wall of the shaping cavity.

7. The pre-shaping device as defined in any one of claims 1-6, wherein the ratio of chord height to chord length of said arc is 3.

8. A push-down shaper device for use with a pre-shaper device according to any of claims 1-7, the push-down shaper device comprising: the battery cell pre-shaping device comprises a support and a lower pressing plate, wherein the lower pressing plate can be movably arranged on the support along the direction vertical to a bearing surface in the pre-shaping device, the lower pressing plate is provided with a pressing station and a lifting station, and when the lower pressing plate is positioned at the pressing station, the lower pressing plate is used for pressing the battery cell on the bearing surface.

9. The press-down shaping device according to claim 8, wherein the press-down plate includes a plate body and a shaping press block group, the shaping press block group is provided on one side of the plate body, and the shaping press block group includes two shaping press blocks oppositely provided in a first direction;

when the lower pressing plate is located at a pressing station, one of the two shaping pressing blocks is used for abutting against the battery core arranged in the first bearing area of the bearing surface, and the other of the two shaping pressing blocks is used for abutting against the battery core arranged in the third bearing area of the bearing surface.

10. The push-down truing apparatus of claim 9 wherein said plate body is shaped to conform to said truing cavity in a direction normal to said load-bearing surface, said plate body being insertable into said truing cavity when said push-down plate is in a push-down station.

11. The push-down shaper of claim 10, further comprising a jaw movably mounted to the frame in the first direction, the jaw having a gripping station and a standby station, the jaw being insertable from a gripping opening of the pre-shaper to a bottom of the shaping cavity when the jaw is in the gripping station; and when the clamping jaw is positioned at a second station, the clamping jaw avoids the battery cell shaping disc.

12. The push-down shaping device according to any one of claims 9 to 11, further comprising a driving mechanism, wherein the driving mechanism is mounted on the support, and an output end of the driving mechanism is connected with the push-down plate for driving the push-down plate to switch between the push-down station and the lifting station.

13. The push-down shaper of claim 12, wherein the drive mechanism comprises: the cylinder, the cylinder includes cylinder body and piston rod, wherein:

the cylinder body is fixed relative to the bracket;

the output end of the piston rod extends out of the cylinder body, and the output end of the piston rod is connected with one side, away from the shaping pressing block, of the plate body.

14. The push-down reshaping device according to claim 13, further comprising a buffering assembly, wherein the buffering assembly comprises an elastic buffering member and a fixing plate, the fixing plate is fixed relative to the bracket, the fixing plate is arranged on the side of the plate body, which is away from the reshaping pressing block, the cylinder body is arranged on the fixing plate, and the piston rod penetrates out of the fixing plate and is connected with the plate body; the elastic buffer piece is arranged between the fixed plate and the plate body, and when the lower pressing plate is positioned at the pressing station, the elastic buffer piece is in an energy storage state.

15. A cell shaping apparatus comprising the pre-shaping device of any one of claims 1 to 8 and the push-down shaping device of any one of claims 8 to 14.

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