CN220636886U - Press-fitting device - Google Patents

Abstract

The utility model relates to the technical field of battery production equipment, in particular to a pressing device. The pressing device is used for pressing the battery core pre-entering shell assembly placed on the workbench, the pressing device comprises a pressing driver and a pressing mechanism, the pressing mechanism is used for being driven by the pressing driver to move up and down relative to the battery core pre-entering shell assembly, a pressing platform of the pressing mechanism is installed on the workbench in a lifting manner, and the pressing plate is connected to the pressing platform in a manner capable of moving elastically in the height direction through an elastic component and is located below the pressing platform. When the lower pressing driver drives the lower pressing plate to drive the lower pressing plate to move downwards, the excessive speed of the lower pressing plate can be avoided; the elastic component can enable the lower pressing plate to be in elastic contact with the shell or the cover plate, so that the deformation of the shell or the cover plate caused by the hard collision between the lower pressing plate and the shell or the cover plate is avoided, and the follow-up welding and fixing of the shell and the cover plate are facilitated.

Description

Press-fitting device

Technical Field

The utility model relates to the technical field of battery production equipment, in particular to a pressing device.

Background

In the battery assembly process, the following steps are generally included: 1) And fixing the battery cell cover plate: the battery cell and the cover plate are welded and fixed through a connecting sheet to form a battery cell assembly; 2) The cell is pre-housed: filling a part of the battery core assembly into a shell to form a battery core pre-filling shell assembly; 3) The battery cell is completely put into the shell: completely pressing the battery cell in the battery cell pre-casing assembly into the casing to form a battery cell completely casing assembly; 4) And fixing a shell cover plate: and (3) positioning and welding the shell body and the cover plate in the shell assembly completely to complete the assembly of the battery.

In the step of completely inserting the battery cell into the casing, the casing or the cover plate is mostly required to be driven to move by a pressing mechanism. The existing pressing mechanism mostly adopts a linear cylinder to directly drive a pressing plate to enable a shell or a cover plate to move. Because the straight line cylinder direct drive holding down plate moves, the velocity of motion of holding down plate hardly controls, and holding down plate and casing or apron are rigid contact, and the easy hard collision that takes place with casing or apron when holding down plate velocity of motion is great to cause the atress deformation of casing or apron, influence the accurate pressure equipment of casing and apron, be unfavorable for the welded fastening of follow-up casing and apron.

Therefore, a pressing device is needed to solve the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide a pressing device which can effectively prevent the output end of the pressing device from hard collision with a shell or a cover plate, reduce the stress deformation of the shell or the cover plate, improve the pressing precision and facilitate the welding and fixing of the subsequent shell and the cover plate.

In order to achieve the above object, the following technical scheme is provided:

a press-fit device for press-fitting a battery cell pre-entry housing assembly placed on a table, the press-fit device comprising:

a push-down driver;

the pressing mechanism is connected with the pressing driver and is used for being driven by the pressing driver to move up and down relative to the battery cell pre-casing assembly, and the pressing mechanism comprises a pressing platform, a pressing plate and an elastic assembly, wherein the pressing platform is installed on the workbench in a lifting manner, the pressing plate is connected to the pressing platform in a manner of elastically moving in the height direction through the elastic assembly and is located below the pressing plate, and the pressing plate can be abutted to a casing or a cover plate of the battery cell pre-casing assembly to drive the casing or the cover plate to move.

As an alternative scheme of the pressing device, the elastic component comprises a guide rod, an elastic piece and a blocking piece, wherein the first end of the guide rod is fixed on the pressing plate, the second end of the guide rod slidably passes through the pressing platform and is fixedly connected with the blocking piece, and the blocking piece is used for preventing the guide rod from being separated from the pressing platform; the elastic piece is sleeved on the guide rod, one end of the elastic piece is abutted with the lower surface of the pressing platform, and the other end of the elastic piece is abutted with the upper surface of the pressing plate.

As an alternative scheme of the pressing device, a plurality of elastic components are arranged around the lower pressing plate at intervals.

As an alternative scheme of the pressing device, the lower pressing plate comprises a first lower pressing plate and a second lower pressing plate, the first lower pressing plate is fixedly connected with the guide rod, and the second lower pressing plate is detachably fixed on the first lower pressing plate.

As an alternative scheme of the pressing device, the output end of the pressing driver is hinged with the pressing billiard ball.

As an alternative scheme of the pressing device, the pressing device further comprises a pressure sensor, the pressure sensor is mounted on the lower surface of the pressing platform, and the upper surface of the pressing plate can be abutted with the pressure sensor.

As an alternative scheme of the pressing device, the lower pressing plate further comprises a plurality of clamping elastic pieces, the first lower pressing plate and the second lower pressing plate are arranged at intervals in parallel, and the clamping elastic pieces are connected between the first lower pressing plate and the second lower pressing plate.

As an alternative to the press-fitting device, the first lower pressing plate is a metal plate.

As an alternative scheme of the pressing device, the second pressing plate is an insulating plate.

As an alternative scheme of the pressing device, the contact end of the pressure sensor and the pressing plate is a spherical surface.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model provides a press-fit device for press-fitting a battery cell pre-casing assembly placed on a workbench, which comprises a press-fit driver and a press-fit mechanism, wherein the press-fit mechanism is used for being driven by the press-fit driver to perform lifting motion relative to the battery cell pre-casing assembly; the lower pressing platform of the lower pressing mechanism is installed on the workbench in a lifting manner, and the lower pressing plate of the lower pressing mechanism is connected to the lower pressing platform in a manner of elastically moving along the height direction through an elastic component and is positioned below the lower pressing platform. When the lower pressing driver drives the lower pressing plate to drive the lower pressing plate to move downwards, the excessive speed of the lower pressing plate can be avoided; the elastic component can enable the lower pressing plate to be in elastic contact with the shell or the cover plate, so that the deformation of the shell or the cover plate caused by the hard collision between the lower pressing plate and the shell or the cover plate is avoided, and the follow-up welding and fixing of the shell and the cover plate are facilitated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural diagram of a battery cell pre-casing assembly according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a press-fit shell device according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a press-fitting device according to an embodiment of the present utility model.

Reference numerals:

100. a cover plate; 200. a battery cell; 300. a housing;

1. a work table; 11. a bottom plate; 12. a guide post; 13. a top plate;

2. a cover plate positioning module;

3. a housing positioning module;

4. pressing down the press-fitting device; 41. a push-down driver; 42. the pressing and mounting mechanism is pressed down; 421. pressing down the platform; 422. a lower pressing plate; 4221. a first lower pressure plate; 4222. a second lower pressure plate; 423. an elastic component; 4231. a guide rod; 4232. an elastic member; 4233. a blocking member; 424. a pressure sensor.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present utility model, the terms "upper," "lower," "left," "right," and the like are used for convenience of description and simplicity of operation based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Fig. 1 shows a schematic structural diagram of a battery cell pre-housing assembly provided in this embodiment. As shown in fig. 1, the battery cell pre-casing assembly comprises a cover plate 100, a battery cell 200 and a casing 300, wherein one end of the battery cell 200 is fixedly connected with the cover plate 100, and the other end of the battery cell 200 is pressed into the casing 300. In the battery assembly process, the following steps are generally included: 1) And fixing the battery cell cover plate: the battery cell 200 and the cover plate 100 are welded and fixed through a connecting sheet to form a battery cell assembly; 2) The cell is pre-housed: filling a portion of the cell 200 of the cell assembly into the housing 300 to form a cell pre-housing assembly; 3) The battery cell is completely put into the shell: the battery cell 200 with the battery cell pre-embedded in the shell assembly is completely pressed into the shell 300 to form a battery cell completely embedded shell assembly, namely, the battery cell 200 with the battery cell completely embedded in the shell assembly is completely positioned in the shell 300, and the shell 300 is enclosed on the periphery side of the cover plate 100; 4) And fixing a shell cover plate: and (3) positioning and welding the shell 300 with the cover plate 100 in which the battery core is completely put into the shell assembly, so as to complete the assembly of the battery.

In the prior art, the step of pre-housing the battery cell and the step of completely housing the battery cell mostly adopt the vertical housing or the lateral housing, no matter whether the housing is vertically or laterally housed, the cover plate 100 and the housing 300 cannot be precisely positioned, and in the press-fitting process, the housing 300 is easily deformed, so that the precise positioning of the housing 300 and the cover plate 100 is further affected, and the welding fixation of the housing 300 and the cover plate 100 is not facilitated.

The embodiment provides a press-mounting device for positioning press-mounting of a battery cell pre-mounting shell assembly in a complete battery cell mounting step, in the press-mounting process, deformation of a shell 300 can be reduced, so that a cover plate 100 of the battery cell pre-mounting shell assembly is completely pressed into the shell 300 and is accurately matched with the shell 300, welding and fixing between a subsequent shell 300 and the cover plate 100 are facilitated, and welding quality between the shell 300 and the cover plate 100 is improved.

For convenience of description, in the present embodiment, a first direction is defined as a width direction of the battery, and a second direction is defined as a length direction of the battery, the second direction being perpendicular to the first direction. It will be appreciated that in other embodiments, the first direction may also be the length direction of the battery and the second direction the width direction of the battery.

Fig. 2 shows a schematic structural view of the press-fit case apparatus provided in the present embodiment. As shown in fig. 2, the press-fitting shell device comprises a workbench 1, a cover plate positioning module 2, a shell positioning module 3, a press-fitting device 4 and a control system, wherein the cover plate positioning module 2, the shell positioning module 3 and the press-fitting device 4 are all arranged on the workbench 1, and the cover plate positioning module 2 is used for bearing a battery cell pre-fitting shell assembly and positioning a cover plate 100 of the battery cell pre-fitting shell assembly; the shell positioning module 3 is used for positioning the shell 300 of the cell pre-entering shell assembly; the pressing device 4 is used for driving the shell 300 to move downwards so as to accurately insert the cover plate 100 into the shell, thereby facilitating the welding and fixing of the subsequent shell 300 and the cover plate 100 and improving the welding quality of the shell 300 and the cover plate 100; the control system is in communication connection with the cover plate positioning module 2, the shell positioning module 3 and the pressing device 4, so that automatic pressing and shell loading operation is realized, and the battery assembly efficiency is improved.

In the press-fitting process, the battery cell pre-casing assembly is placed on the cover plate positioning module 2 in a downward posture of the cover plate 100, the cover plate positioning module 2 positions the cover plate 100, the shell positioning module 3 positions the shell 300, and the press-fitting device 4 is used for driving the shell 300 to move downwards until the shell 300 is completely sleeved on the battery cell 200 and is accurately matched with the cover plate 100 to form the battery cell complete casing assembly. Finally, the battery cell is completely put into the shell assembly by a manual or mechanical arm, taken out and transferred to a welding station, and the shell 300 and the cover plate 100 are welded and fixed.

In this embodiment, the workbench 1 includes a bottom plate 11, a guide pillar 12 and a top plate 13, where the bottom plate 11 and the top plate 13 are arranged in parallel at intervals, a space between the bottom plate 11 and the top plate 13 is a press-fit space, and the guide pillar 12 is used for connecting the bottom plate 11 and the top plate 13. So set up, can enough guarantee the structural strength of workstation 1, can be convenient for the installation of apron positioning module 2, casing positioning module 3 and push-down press fit device 4 on workstation 1 again. In other embodiments, the bottom plate 11 and the top plate 13 may be disposed in a non-parallel manner, and may be specifically designed according to the needs, which is not limited herein.

Fig. 3 shows a schematic structural view of the press-fitting device 4 provided in the present embodiment. As shown in fig. 3 in combination with fig. 2, the press-fitting device 4 includes a press-fitting driver 41 and a press-fitting mechanism 42, the press-fitting mechanism 42 is liftably mounted on the guide post 12 of the table 1, the press-fitting driver 41 is fixed on the top plate 13, and an output end of the press-fitting driver 41 is connected to the press-fitting mechanism 42 and is used for driving the press-fitting mechanism 42 to lift relative to the guide post 12. When the push-down driver 41 drives the push-down press-fitting mechanism 42 to move downward, the push-down press-fitting mechanism 42 can abut the housing 300 and move the housing 300 downward. In this embodiment, the push-down driver 41 may be a servo cylinder.

As further shown in fig. 3, the lower press-fitting mechanism 42 includes a lower press platform 421 and a lower press plate 422, the lower press platform 421 is liftably mounted on the guide post 12, and an output end of the lower press driver 41 is connected to the lower press platform 421. When the pressing driver 41 drives the pressing platform 421 to move downwards, the pressing plate 422 can be abutted against the top surface of the housing 300, so as to drive the housing 300 to move downwards, and complete the process of completely inserting the battery cell into the housing. In this embodiment, the output end of the pressing driver 41 is ball hinged with the lower platen 421, so that not only can the assembly error of the connection position of the pressing driver 41 and the lower platen 421 be adapted, but also the abrasion of the connection position of the pressing driver 41 and the lower platen 421 caused by the different axes of the connection position of the pressing driver 41 and the lower platen 421 can be avoided.

The lower press-fitting mechanism 42 further includes an elastic component 423, and the lower pressing plate 422 is installed below the lower platen 421 through the elastic component 423 in an elastically liftable manner, so that hard collision between the lower pressing plate 422 and the top surface of the housing 300 is avoided. In the present embodiment, four groups of elastic components 423 are respectively disposed at four corners of the lower platen 422 to prevent the lower platen 422 from being hard-bumped with the housing 300 to damage the battery cell 200 during the pressing process, and to ensure the straightness of the pressing process of the lower platen 422. Of course, in other embodiments, the number of elastic members 423 may be any other number, and is not limited herein.

The elastic component 423 includes a guide rod 4231, an elastic member 4232 and a blocking member 4233, wherein a first end of the guide rod 4231 is fixed on the lower platen 422, the elastic member 4232 is sleeved on the guide rod 4231, one end of the elastic member 4232 is abutted with the lower surface of the lower platen 421, the other end of the elastic member 4232 is abutted with the upper surface of the lower platen 422, a second end of the guide rod 4231 slidably passes through the lower platen 421 and is fixedly connected with the blocking member 4233, and the blocking member 4233 is used for preventing the guide rod 4231 from being separated from the lower platen 421. Optionally, the blocking member 4233 is detachably connected to the guide bar 4231 by threads.

The pressing mechanism 42 further includes a pressure sensor 424, the pressure sensor 424 is mounted on the lower surface of the pressing platform 421, the upper surface of the pressing plate 422 can be abutted against the pressure sensor 424, the contact end of the pressure sensor 424 and the pressing plate 422 is a sphere, the pressure sensor 424 is used for detecting the pressure applied to the pressing plate and feeding back the pressure value to the control system, so that the control system can conveniently judge whether the complete process of the battery core is completely in the shell. In the press-fitting process, the lower pressing plate 422 is in linear flexible contact with the shell 300, along with the continuous pressing of the lower pressing platform 421, the shell 300 reacts to the lower pressing plate 422, the elastic member 4232 is stressed and rebounded, the upper surface of the lower pressing plate 422 can be in contact with the pressure sensor 424, at this time, the pressure sensor 424 detects the pressure of the press-fitting shell and feeds back to the control system, and in the press-fitting process, the press-fitting pressure parameter fed back by the pressure sensor 424 and the press-fitting stroke parameter pushed downwards by the press-fitting driver 41 can be continuously seen. When the casing 300 is pressed down until the cover plate 100 is completely put into the casing, even if the pressing driver 41 continues to drive the pressing platform 421 to move downwards, the pressing plate 422 will not move downwards any more, at this time, the blocking acting force of the base plate of the cover plate positioning module 2 on the casing 300 increases the pressure detected by the pressure sensor 424 to the set value, and the control system can determine that the process of completely putting the battery cell into the casing is completed, so that the whole press-mounting process of the battery cell pre-putting the casing assembly is safe, stable and accurate.

In each press-fitting process, the stroke parameters of the pressing platform 421 are recorded, and since the sizes of the same batch of batteries are consistent, the stroke parameters of the pressing platform 421 for the process of completely inserting the battery core of any battery into the shell should be consistent in theory, and considering that certain errors exist in the size of each battery, whether the equipment and the process of inserting the battery core into the shell are normal or not can be judged by analyzing the stroke parameters of the pressing platform 421. For example, when the travel parameter of the pressing platform 421 is greatly changed, the control system may send out an alarm notification to remind the staff to check the situation of the press-fit site in time.

In the present embodiment, the lower pressure plate 422 includes a first lower pressure plate 4221 and a second lower pressure plate 4222, the first lower pressure plate 4221 is fixedly connected with the guide rod 4231, and the second lower pressure plate 4222 is detachably and fixedly connected with the first lower pressure plate 4221. So configured, when the second lower platen 4222 wears, the second lower platen 4222 can be replaced. In this embodiment, the first lower pressure plate 4221 is made of a metal plate, which has good structural strength and can increase the service life of the first lower pressure plate 4221. The second lower platen 4222 is an insulating plate, such as a PTFE plate (polytetrafluoroethylene plate), which is a high-performance, high-temperature-resistant thermoplastic plastic having excellent wear resistance and excellent mechanical properties. The PTFE sheet can both extend the service life of the second lower platen 4222 and reduce wear to the housing 300. In other embodiments, the lower platen 422 may further include springs, and a plurality of springs are disposed between the first lower platen 4221 and the second lower platen 4222 to realize elastic abutment between the lower platen 422 and the top surface of the housing 300, so as to avoid the lower platen 422 from damaging the housing 300.

Note that in the description of this specification, a description referring to the terms "one embodiment," "in other embodiments," and the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing description is only of the preferred embodiments of the utility model and the technical principles employed. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims (10)

1. A press-fitting device for press-fitting of a cell pre-housing assembly placed on a workbench (1), the press-fitting device comprising:

a push-down driver (41);

the lower pressing mechanism (42) is connected with the lower pressing driver (41) and is used for being driven by the lower pressing driver (41) to move up and down relative to the battery cell pre-casing assembly, the lower pressing mechanism comprises a lower pressing platform (421), a lower pressing plate (422) and an elastic component (423), the lower pressing platform (421) is installed on the workbench (1) in a lifting mode, the lower pressing plate (422) is connected onto the lower pressing platform (421) in a mode that the elastic component (423) can move elastically in the height direction and is located below the lower pressing platform (421), and the lower pressing plate (422) can be abutted with the shell (300) or the cover plate (100) of the battery cell pre-casing assembly to drive the shell (300) or the cover plate (100) to move downwards.

2. The press-fitting device according to claim 1, wherein the elastic assembly (423) includes a guide rod (4231), an elastic member (4232), and a blocking member (4233), a first end of the guide rod (4231) is fixed to the lower platen (422), a second end of the guide rod (4231) slidably passes through the lower platen (421) and is fixedly connected to the blocking member (4233), and the blocking member (4233) is configured to prevent the guide rod (4231) from being separated from the lower platen (421); the elastic member (4232) is sleeved on the guide rod (4231), one end of the elastic member (4232) is in contact with the lower surface of the pressing platform (421), and the other end of the elastic member is in contact with the upper surface of the pressing plate (422).

3. The press-fit device according to claim 2, wherein a plurality of the elastic members (423) are arranged at intervals around the lower press plate (422).

4. A press-fit device as claimed in claim 3, wherein the lower press plate (422) comprises a first lower press plate (4221) and a second lower press plate (4222), the first lower press plate (4221) being fixedly connected to the guide bar (4231), the second lower press plate (4222) being detachably fixed to the first lower press plate (4221).

5. The press-fit device according to claim 4, wherein the lower press plate (422) further comprises a plurality of clamping elastic members, the first lower press plate (4221) and the second lower press plate (4222) are arranged in parallel at intervals, and the plurality of clamping elastic members are connected between the first lower press plate (4221) and the second lower press plate (4222).

6. The press-fit device according to claim 4, wherein the first lower pressure plate (4221) is a metal plate.

7. The press-fit device according to claim 4, wherein the second lower pressure plate (4222) is an insulating plate.

8. The press-fitting device according to claim 1, wherein an output end of the press-down driver (41) is ball-hinged to the lower platen (421).

9. The press-fit device according to any one of claims 1 to 8, further comprising a pressure sensor (424), the pressure sensor (424) being mounted on a lower surface of the press-down platform (421), an upper surface of the press-down plate (422) being capable of abutting the pressure sensor (424).

10. The press-fit device according to claim 9, wherein a contact end of the pressure sensor (424) with the lower pressure plate (422) is a spherical surface.