Patent Description:
The present application relates to the technical field of batteries, and in particular, to a rolling device and a measuring device.

Before measuring the shear force and bonding force of an electrode sheet, it is necessary to roll the electrode sheet so that the electrode sheet can be stably bonded to a rolled steel plate or another supporting structure for subsequent measurement.

At present, in a rolling process, it is often difficult to control the magnitude and direction of a rolling pressure, which easily leads to changes in the rolling pressure, and results in the problem of a low accuracy of a final measurement result.

<CIT> relates to a rolling device of a flexible graphite monopolar plate for fuel cell production according to the preamble of claim <NUM>. <CIT> relates to a lithium battery pole piece rolling equipment.

Based on this, it is necessary to provide a rolling device and a measuring device to solve the problem that a current rolling process cannot provide a constant rolling pressure, resulting in low accuracy of a measurement result.

In a first aspect, a rolling device with the features of claim <NUM> is provided.

In the technical solution of the embodiment of the present application, through the above structure, the rolling assembly is capable of moving on the bracket in the first direction parallel to the working surface. In a moving process, a constant rolling pressure is provided to the member to be rolled placed on the working surface, thereby improving the uniformity of the rolling process and improving the accuracy of subsequent shear force and bonding force measurement.

According to the invention, the rolling assembly includes a connecting element and a rolling member, the connecting element is movably mounted on the bracket in the first direction, the rolling member is rotatably arranged on the connecting element around a rotating shaft, and an axial direction of the rotating shaft is parallel to the working surface.

In the technical solution of the embodiment of the present application, in the rolling process, the rolling member always follows the connecting element and moves in the first direction parallel to the working surface, and the axial direction of the rotating shaft of the rolling member is parallel to the working surface; therefore, a rolling force applied by the rolling member to the member to be rolled is always perpendicular to the member to be rolled, and there is no oblique upward or downward component force. Therefore, the magnitude and direction of the rolling pressure are kept constant, so that the rolling of the member to be rolled is more uniform.

In some embodiments, the rolling device includes a guiding member arranged on the bracket, and a matching portion that matches the guiding member is arranged on the connecting element, so that the connecting element is capable of moving in the first direction.

In the technical solution of the embodiment of the present application, through the matching connection between the guiding member and the matching portion, the connecting element moving in the first direction on the bracket is capable of being achieved. Therefore, the rolling member is driven by the connecting element to move in the first direction, and rolls the member to be rolled.

In some embodiments, the guiding member is configured as a guide rail extending in the first direction, and the matching portion is configured as a slider that fits the guide rail.

In the technical solution of the embodiment of the present application, by arranging the guide rail and the slider that are in matching connection to each other, stable connection between the connecting element and the bracket is capable of being realized, and the connecting element is capable of moving stably in the first direction under the guidance of the guide rail, thereby ensuring that the rolling member is capable of applying a stable and uniform rolling force to the member to be rolled.

In some embodiments, the guide rail includes a first sub-guide rail and a second sub-guide rail arranged at an interval in a second direction, and the slider includes a first sub-slider and a second sub-slider corresponding to the first sub-guide rail and the second sub-guide rail, respectively. The connecting element is connected between the first sub-slider and the second sub-slider.

The second direction intersects the first direction, and the second direction is parallel to the working surface.

In the technical solution of the embodiment of the present application, through the above structure, the connecting element is capable of being more stably arranged on the guide rail and moving stably in the first direction. In this process, the connecting element drives the rolling member to move synchronously, so that the rolling member is capable of applying a stable rolling force to the member to be rolled placed on the working surface, thereby improving the rolling precision.

According to the invention, the connecting element includes a connecting main body as well as a first connecting beam and a second connecting beam respectively arranged on the connecting main body. The first connecting beam and the second connecting beam are respectively located on two opposite sides of the rolling member in the axial direction of the rotating shaft, and the first connecting beam and the second connecting beam are each provided with a through hole for accommodating the rotating shaft.

In the technical solution of the invention, through the above structure, the rolling member smoothly rotating around the rotating shaft while moving in the first direction along with the connecting element is capable of being achieved. Therefore, in the rolling process, the rolling member is capable of rolling the member to be rolled in the first direction, so that the force on the member to be rolled is uniform, and the rolling precision is improved.

According to the invention, the through hole is configured as a kidney-shaped hole extending in a third direction, and the third direction is arranged to intersect the working surface.

In the technical solution of the embodiment of the present application, through the above structure, it can be ensured that the rolling pressure applied to the member to be rolled in the rolling process is always kept constant, thereby ensuring the accuracy of the rolling process and improving the accuracy of the subsequent shear force and bonding force measurement.

In some embodiments, the rolling device further includes first position limiting members arranged at opposite ends of the bracket in the first direction, and the first position limiting members are used for limiting the rolling assembly on the bracket in the first direction.

In the technical solution of the embodiment of the present application, by arranging the first position limiting members, the rolling assembly is capable of being arranged on the bracket more stably, thereby ensuring the smooth progress of the rolling process.

In some embodiments, an accommodating groove for placing at least a part of the member to be rolled is arranged on the working surface, and the depth of the accommodating groove is smaller than the thickness of the member to be rolled.

In the technical solution of the embodiment of the present application, the accommodating groove can limit a position of the member to be rolled placed on the working surface. When the member to be rolled is rolled by the rolling member, the accommodating groove can prevent the member to be rolled from moving, thereby ensuring the smooth progress of the rolling process.

In some embodiments, the accommodating groove has a closed end and an open end oppositely arranged in the first direction, and in a direction from the open end to the closed end, the closed end is capable of limiting the position of the member to be rolled in the accommodating groove.

In the technical solution of the embodiment of the present application, through the above structure, the accommodating groove is capable of adapting to members to be rolled in different sizes, so that the application range of the rolling device is wider.

In some embodiments, a second position limiting member is arranged on the base, and the second position limiting member is arranged corresponding to the open end at an interval. In a direction from the closed end to the open end, the second position limiting member is capable of limiting the position of the member to be rolled placed in the accommodating groove.

In the technical solution of the embodiment of the present application, when the member to be rolled is placed in the accommodating groove, and the member to be rolled is rolled by the rolling member, the closed end of the accommodating groove can cooperate with the second position limiting member to realize the position limiting of the member to be rolled in the first direction, thereby ensuring the smooth progress of the rolling process.

In some embodiments, the rolling device further includes an operating member arranged on the rolling assembly, and the operating member is used for providing a force application position on the rolling assembly.

In the technical solution of the embodiment of the present application, when rolling is required, a certain external force may be applied to the rolling assembly through the operating member, so that it moves in the first direction on the guide rail, thereby realizing the rolling for the member to be rolled.

In a second aspect, the present application provides a measuring device with the features of claim <NUM>, i.e. including the above rolling device.

In the above rolling device and measuring device, the rolling assembly is movably mounted on the bracket in the first direction parallel to the working surface, and when the member to be rolled is placed on the working surface, the rolling assembly provides a rolling pressure to the member to be rolled. In the rolling process, the rolling assembly moves in the first direction, so as to be capable of ensuring that the rolling pressure applied to the member to be rolled is constant and always perpendicular to the member to be rolled, that is, to ensure that the rolling pressure remains constant, thereby reducing the influence of external factors on the rolling process and improving the accuracy of a measurement result.

The above description is only a summary of the technical solutions of the present application. In order to be able to understand the technical means of the present application more clearly, the technical means can be implemented according to the content of the specification. Furthermore, to make the above and other objectives, features and advantages of the present application more comprehensible, specific implementations of the present application are exemplified below.

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the embodiments. The drawings are for the purpose of illustrating the embodiments only and are not to be considered a limitation to the present application. Also, the same components are denoted by the same reference numerals throughout all the drawings. In the drawings:.

Rolling device; <NUM>. Member to be rolled; <NUM>. Base; <NUM>. Bracket; <NUM>. Rolling assembly; <NUM>. Guiding member; <NUM>. First position limiting member; <NUM>. Operating member; <NUM>. Working surface; <NUM>. Second position limiting member; <NUM>. Connecting element; <NUM>. Rolling member; <NUM>. First sub-guide rail; <NUM>. Second sub-guide rail; <NUM>. Accommodating groove; <NUM>. Matching portion; <NUM>. Connecting main body; <NUM>. First connecting beam; <NUM>. Second connecting beam; <NUM>. Closed end; <NUM>. Open end; <NUM>. First sub-slider; <NUM>. Second sub-slider; <NUM>. Through hole; a. First direction; b. Second direction; c. Third direction.

Embodiments of the technical solutions of the present application will be described in detail below in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and therefore are only used as examples and cannot be used to limit the scope of protection of the present application.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art belonging to the technical field of the present application; the terms used herein are intended only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and the claims of the present application and in the description of drawings above are intended to cover non-exclusive inclusion.

In the description of the embodiments of the present application, the technical terms "first," "second," and the like are used only to distinguish between different objects, and are not to be understood as indicating or implying a relative importance or implicitly specifying the number, particular order, or primary and secondary relation of the technical features indicated. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically defined.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only an association relationship for describing associated objects, indicating that there may be three relationships, for example A and/or B may represent three situations: A exists alone, both A and B exist, and B exists alone. In addition, the character "/" herein generally means that the associated objects before and after it are in an "or" relationship.

In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two) groups, and "multiple sheets" refers to two or more (including two) sheets.

In the description of the embodiments of the present application, the orientation or position relationship indicated by the technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientation or position relationship shown in the drawings and are intended to facilitate the description of the embodiments of the present application and simplify the description only, rather than indicating or implying that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore are not to be interpreted as limitations on the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise expressly specified and limited, the technical terms such as "mount," "join," "connect," and "fix" should be understood in a broad sense, such as, a fixed connection, a detachable connection, or an integral connection; a mechanical connection, or an electrical connection; a direct connection, an indirect connection through an intermediate medium, an internal connection of two elements, or interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

At present, from the perspective of the development of the market situation, power batteries are more and more widely used. The power batteries are used in energy storage power source systems such as hydraulic, thermal, wind and solar power stations as well as in electric vehicles such as electric bicycles, electric motorcycles and electric cars, and other fields. With the continuous expansion of the application field of the power batteries, the market demand is also constantly expanding.

A battery is usually composed of one or a plurality of battery cells, that is, a battery cell is the smallest unit constituting a battery. The battery cell is composed of an end cover, a case, a cell assembly, and other functional components, wherein the cell assembly is a component of the battery cell that undergoes electrochemical reactions. The battery cell assembly is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is usually arranged between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet may be collectively referred to as electrode sheets. After the electrode sheet is manufactured, it needs to go through a series of testing procedures to ensure that the structure of the electrode sheet meets requirements for use.

It is necessary to measure the shear force and the bonding force of the electrode sheet. Before the measurement, it is first necessary to roll the electrode sheet to bond it to a rolled steel plate or another supporting structure for subsequent measurement.

At present, in the rolling process, a pressing wheel is usually manually operated, and a certain rolling force is applied to the electrode sheet by pulling the pressing wheel. However, in this process, when the pressing wheel is manually pulled, different pulling directions may be generated, such as obliquely upward or downward, so that the pressure does not completely perpendicularly act on the electrode sheet, resulting in an inaccurate subsequent measurement result.

Based on the above considerations, in order to ensure that the rolling pressure applied to the electrode sheet remains constant in the rolling process, one or a plurality of embodiments of the present application provide a rolling device, a rolling assembly moves on a bracket in a first direction, and in the moving process, an electrode sheet on a working surface is rolled, so as to ensure that the magnitude and direction of the rolling pressure remain constant, reduce the influence of external factors, and improve the accuracy of subsequent shear force and bonding force measurement.

Referring to <FIG>, an embodiment of the present application provides a rolling device <NUM>, including a base <NUM>, a bracket <NUM>, and a rolling assembly <NUM>. The base <NUM> has a working surface <NUM> for placing a member to be rolled <NUM>, and the bracket <NUM> is arranged on the base <NUM>. The rolling assembly <NUM> is movably mounted on the bracket <NUM> in a first direction a, and is used for providing a pressure to the member to be rolled <NUM> on the working surface <NUM>. The first direction a is parallel to the working surface <NUM>.

It should be noted that when the rolling device <NUM> is applied to an electrode sheet, the member to be rolled <NUM> refers to an electrode sheet to be rolled and a rolled steel plate used for fixing the electrode sheet. The electrode sheet is fixed to the rolled steel plate with a double-sided adhesive tape or another connection structure, and then the rolled steel plate is placed on the working surface <NUM> to achieve fixing of the electrode sheet to the working surface <NUM>.

Further, in order to facilitate fixing the member to be rolled <NUM> to the base <NUM> and reduce the influence of an external force on the rolling process, the working surface <NUM> is usually arranged as an upper surface of the base <NUM>, that is, when the base <NUM> is fixed on the external supporting structure such as the ground or a desktop, the working surface <NUM> is a horizontal plane.

The bracket <NUM> is erected on the base <NUM>. Specifically, the bracket <NUM> may be assembled from a plurality of beams and carlings that are perpendicular to each other, and the carlings are vertically arranged on the base <NUM>, and the beams are horizontally connected to one end of the carlings away from the base <NUM>, that is, the beams are arranged parallel to the working surface <NUM>.

In addition, the beam is extended in the first direction a, and the rolling assembly <NUM> is movably mounted on the beam, so that the rolling assembly <NUM> is capable of moving in the first direction a on the beam.

The rolling assembly <NUM> refers to a component capable of providing a rolling pressure to the member to be rolled <NUM> placed on the working surface <NUM>. When the rolling assembly <NUM> moves in the first direction a on the beam, the end of the rolling assembly <NUM> away from the beam contacts with the member to be rolled <NUM>, and applies a constant rolling pressure perpendicularly to the member to be rolled <NUM>. As a result, the rolling pressure to the member to be rolled <NUM> is made more uniform, thereby improving the accuracy of the subsequent shear force and bonding force measurement.

Through the above structure, the rolling assembly <NUM> is capable of moving on the bracket <NUM> in the first direction a parallel to the working surface <NUM>. In the moving process, a constant rolling pressure is provided to the member to be rolled <NUM> placed on the working surface <NUM>, thereby improving the uniformity of the rolling process and improving the accuracy of subsequent shear force and bonding force measurement.

In some embodiments, the rolling assembly <NUM> includes a connecting element <NUM> and a rolling member <NUM>, the connecting element <NUM> is movably mounted on the bracket <NUM> in the first direction a, the rolling member <NUM> is rotatably arranged on the connecting element <NUM> around a rotating shaft, and an axial direction of the rotating shaft is parallel to the working surface <NUM>.

The connecting element <NUM> plays a connecting role between the bracket <NUM> and the rolling member <NUM>, so that the rolling member <NUM> is capable of moving synchronously in the first direction a when driven by the connecting element <NUM>.

Specifically, when the connecting element <NUM> moves in the first direction a on the bracket <NUM>, the rolling member <NUM> moves synchronously with the connecting element <NUM>. At the same time, the rolling member <NUM> presses downward against the member to be rolled <NUM> on the working surface <NUM>, and the rolling member <NUM> rotates around the rotating shaft to achieve the effect of providing a continuous rolling force on the member to be rolled <NUM>.

In the rolling process, the rolling member <NUM> always follows the connecting element <NUM> and moves in the first direction a parallel to the working surface <NUM>, and the axial direction of the rotating shaft of the rolling member <NUM> is parallel to the working surface <NUM>; therefore, a rolling force applied by the rolling member <NUM> to the member to be rolled <NUM> is always perpendicular to the member to be rolled <NUM>, and there is no oblique upward or downward component force. Therefore, the magnitude and direction of the rolling pressure are kept constant, so that the rolling of the member to be rolled <NUM> is more uniform.

In some embodiments, the rolling device <NUM> includes a guiding member <NUM> arranged on the bracket <NUM>, and a matching portion <NUM> that matches the guiding member <NUM> is arranged on the connecting element <NUM>, so that the connecting element <NUM> is capable of moving in the first direction a.

It should be noted that the guiding member <NUM> and the bracket <NUM> may be arranged integrally or separately. When the guiding member <NUM> and the bracket <NUM> are arranged integrally, the guiding member <NUM> may be a part of the bracket <NUM>, for example, a chute arranged on the bracket <NUM>. When the guiding member <NUM> and the bracket <NUM> are arranged separately, the guiding member <NUM> may be mounted on the bracket <NUM>, such as a beam structure having a chute, and the beam structure having a chute is mounted on the bracket <NUM>.

Further, the matching portion <NUM> and the connecting element <NUM> may also be arranged integrally or separately. When the matching portion <NUM> and the connecting element <NUM> are arranged integrally, the matching portion <NUM> is actually one of parts on the connecting element <NUM>, for example, when the guiding member part <NUM> is a chute, the matching portion <NUM> may be a protruding structure on the connecting element <NUM>, and is capable of being engage into the chute. When the matching portion <NUM> and the connecting element <NUM> are arranged separately, the matching portion <NUM> may be mounted on the connecting element <NUM>, for example, when the guiding member part <NUM> is a chute, the matching portion <NUM> may be a slider protruding from the connecting element <NUM>, and is capable of being engaged into the chute.

Therefore, through the matching connection between the guiding member <NUM> and the matching portion <NUM>, the connecting element <NUM> is capable of moving in the first direction a on the bracket <NUM>. Therefore, the rolling member <NUM> is driven by the connecting element <NUM> to move in the first direction a, and rolls the member to be rolled <NUM>.

In some embodiments, the guiding member <NUM> is configured as a guide rail extending in the first direction a, and the matching portion <NUM> is configured as a slider that fits the guide rail.

Specifically, when the bracket <NUM> is assembled from a beam and a carling. The beam extends in the first direction a and is connected to an end of the carling away from the base <NUM>, and the guide rail is mounted on the beam in the extending direction of the beam. The slider on the connecting element <NUM> is in matching connection with the guide rail on the bracket <NUM>, so that the connecting element <NUM> is capable of moving on the guide rail. At the same time, the connecting element <NUM> drives the rolling member <NUM> to move synchronously, thereby realizing the rolling action of the member to be rolled <NUM>.

By arranging the guide rail and the slider that are in matching connection to each other, stable connection between the connecting element <NUM> and the bracket <NUM> is capable of being realized, and the connecting element <NUM> is capable of moving stably in the first direction a under the guidance of the guide rail, thereby ensuring that the rolling member <NUM> is capable of applying a stable and uniform rolling force to the member to be rolled <NUM>.

In some other embodiments, the guiding member <NUM> and the matching portion <NUM> may also be configured as other mutually matching structures, for example, the guiding member <NUM> may be arranged as a ball screw extending in the first direction a, and correspondingly, the matching portion <NUM> is arranged as a slider that fits the ball screw. For another example, the guiding member <NUM> may further be arranged as a chute extending in the first direction a, and correspondingly, the matching portion <NUM> is arranged as a slider snap fitted in the chute, so as to be capable of driving the connecting element <NUM> to move in the chute. Of course, the guiding member <NUM> and the matching portion <NUM> may also be arranged as other mutually matching connection structures, which will not be described in detail here.

Referring to <FIG>, <FIG>, and <FIG> together, in some embodiments, the guide rail includes a first sub-guide rail <NUM> and a second sub-guide rail <NUM> arranged at an interval in a second direction b, and the slider includes a first sub-slider <NUM> and a second sub-slider <NUM> corresponding to the first sub-guide rail <NUM> and the second sub-guide rail <NUM>, respectively. The connecting element <NUM> is connected between the first sub-slider <NUM> and the second sub-slider <NUM>. The second direction b intersects the first direction a, and the second direction b is parallel to the working surface <NUM>.

It should be noted that when the guide rail includes the first sub-guide rail <NUM> and the second sub-guide rail <NUM> arranged at an interval in the second direction b, the bracket <NUM> may be arranged as a first sub-bracket and a second sub-bracket arranged at an interval in the second direction b. The first sub-bracket and the second sub-bracket are each composed of two carlings perpendicular to the working surface <NUM> and a beam parallel to the working surface <NUM>. In addition, each beam is configured to extend in the first direction a and is connected between two corresponding carlings.

Therefore, the first sub-guide rail <NUM> is capable of being mounted on one of the beams in the first direction a, and the second sub-guide rail <NUM> is capable of being mounted on the other beam in the first direction a. The first sub-slider <NUM> and the second sub-slider <NUM> are respectively connected to two opposite ends of the connecting element <NUM>, the first sub-slider <NUM> is in matching connection with the first sub-guide rail <NUM>, and the second sub-slider <NUM> is in matching connection with the second sub-guide rail <NUM>, that is, the connecting element <NUM> is erected between the first sub-guide rail <NUM> and the second sub-guide rail <NUM>. Therefore, the arrangement of the connecting element <NUM> on the bracket <NUM> is more stable.

Furthermore, both the first direction a and the second direction b are parallel to the working surface <NUM>, and the first direction a and the second direction b are perpendicular to each other, that is, the first direction a and the second direction b are two mutually perpendicular directions in the horizontal plane.

Specifically, the first sub-bracket and the second sub-bracket are arranged on the base <NUM> at an interval in the second direction b. The connecting element <NUM> straddles the first sub-bracket and the second sub-bracket through the first sub-slider <NUM> and the second sub-slider <NUM>, and the connecting element <NUM> is arranged perpendicular to the first sub-guide rail <NUM> and the second sub-guide rail <NUM>.

Through the above structure, the connecting element <NUM> is capable of being more stably arranged on the guide rail and moving stably in the first direction a. In this process, the connecting element <NUM> drives the rolling member <NUM> to move synchronously, so that the rolling member <NUM> is capable of applying a stable rolling force to the member to be rolled <NUM> placed on the working surface <NUM>, thereby improving the rolling precision.

Referring to <FIG> and <FIG> together, in some embodiments, the connecting element <NUM> includes a connecting main body <NUM> and a first connecting beam <NUM> and a second connecting beam <NUM> respectively arranged on the connecting main body <NUM>. The first connecting beam <NUM> and the second connecting beam <NUM> are respectively located on two opposite sides of the rolling member <NUM> in the axial direction of the rotating shaft, and the first connecting beam <NUM> and the second connecting beam <NUM> are each provided with a through hole <NUM> for accommodating the rotating shaft.

The connecting main body <NUM> can realize the connection with the bracket <NUM>. Specifically, one end of the connecting main body <NUM> is connected to the first connecting beam <NUM> and the second connecting beam <NUM>, and the other end is connected to the first sub-slider <NUM> and the second sub-slider <NUM> and arranged between the first sub-guide rail <NUM> and the second sub-guide rail <NUM> of the bracket <NUM> through the first sub-slider <NUM> and the second sub-slider <NUM>.

Further, in order that the rolling member <NUM> driven by the connecting element <NUM> is capable of better rotating around the rotating shaft, the axial direction of the rotating shaft is arranged parallel to the second direction b, that is, the first connecting beam <NUM> and the second connecting beam <NUM> are arranged in the second direction b at an interval, and the rolling member <NUM> is arranged between the first connecting beam <NUM> and the second connecting beam <NUM>.

Specifically, the rolling member <NUM> may be arranged as a pressing wheel, and a rotating shaft on the pressing wheel passes through the through holes <NUM> on the first connecting beam <NUM> and the second connecting beam <NUM>, so that the pressing wheel is capable of rotating around the rotating shaft in a process of moving synchronously in the first direction a along with the connecting element <NUM>, so as to better roll the member to be rolled <NUM>.

Through the above structure, the rolling member <NUM> smoothly rotating around the rotating shaft while moving in the first direction a along with the connecting element <NUM> is capable of being achieved. Therefore, in the rolling process, the rolling member <NUM> is capable of rolling the member to be rolled <NUM> in the first direction a, so that the force on the member to be rolled <NUM> is uniform, and the rolling precision is improved.

Referring to <FIG> and <FIG>, in some embodiments, the through hole <NUM> is configured as a kidney-shaped hole extending in a third direction c, and the third direction c is arranged to intersect the working surface <NUM>.

Specifically, the third direction c is perpendicular to the working surface <NUM>, that is, the third direction c is a vertical direction. When the rolling member <NUM> is mounted between the first connecting beam <NUM> and the second connecting beam <NUM> through the rotating shaft, the rolling member <NUM> is capable of moving up and down in the through hole <NUM> in the vertical direction.

Thus, when the member to be rolled <NUM> is not placed on the working surface <NUM>, the rolling member <NUM> is supported on the working surface <NUM> under the action of its own gravity. When the member to be rolled <NUM> needs to be rolled, the rolling member <NUM> is lifted up to move upward in the through hole <NUM>. The member to be rolled <NUM> is placed on the working surface <NUM> from a gap between the rolling member <NUM> and the working surface <NUM>, and at this time, the rolling member <NUM> is released, so that the rolling member <NUM> can press, under the action of its own gravity, against the member to be rolled <NUM>. At this time, a rolling pressure applied by the rolling member <NUM> to the member to be rolled <NUM> is only the own gravity of the rolling member <NUM>, and the own gravity of the rolling member <NUM> is a fixed value. Therefore, it can be ensured that the rolling pressure applied to the member to be rolled <NUM> is kept constant.

It should be noted that of members to be rolled <NUM> in different sizes may require to be applied with rolling pressures having different magnitudes. In view of this situation, different rolling pressures may be applied to different members to be rolled <NUM> by replacing the rolling members <NUM> with different gravity.

In addition, the third direction c may also be set as a direction that intersects but and is not perpendicular to the working surface <NUM>. That is, the third direction c may be set as any direction between the vertical direction and the working surface <NUM>. At this time, when the rolling member <NUM> is arranged between the first connecting beam <NUM> and the second connecting beam <NUM> through the rotation of the rotating shaft, the rolling member <NUM> is still capable of generating an upward or downward displacement in the through hole <NUM> to apply the own gravity of the rolling member <NUM> to the member to be rolled <NUM>.

Through the above structure, it can be ensured that the rolling pressure applied to the member to be rolled <NUM> in the rolling process is always kept constant, thereby ensuring the accuracy of the rolling process and improving the accuracy of the subsequent shear force and bonding force measurement.

In some embodiments, the rolling device <NUM> further includes first position limiting members <NUM> arranged at opposite ends of the bracket <NUM> in the first direction a, and the first position limiting members <NUM> are used for limiting the rolling assembly <NUM> on the bracket <NUM> in the first direction a.

Specifically, when the connecting element <NUM> drives the rolling member <NUM> to move in the first direction a on the guide rail, in order to prevent the connecting element <NUM> from being separated from the guide rail in the moving process, first position limiting members <NUM> are arranged on the bracket <NUM>. Every two first position limiting members <NUM> form a group and are arranged correspondingly to one guide rail. That is, the two first position limiting members <NUM> in each group are respectively arranged at opposite ends of the corresponding guide rail in the first direction a. When the connecting element <NUM> moves in the first direction a on the guide rail, the two first position limiting members <NUM> are capable of limiting the position of the connecting element <NUM> to prevent the connecting element <NUM> from detaching from the guide rail, thereby improving the stability of the connecting element <NUM> on the guide rail.

By arranging the first position limiting members <NUM>, the rolling assembly <NUM> is capable of being arranged on the bracket <NUM> more stably, thereby ensuring the smooth progress of the rolling process.

In some embodiments, an accommodating groove <NUM> for placing at least a part of the member to be rolled <NUM> is arranged on the working surface <NUM>, and the depth of the accommodating groove <NUM> is smaller than the thickness of the member to be rolled <NUM>.

The accommodating groove can limit a position of the member to be rolled <NUM> placed on the working surface <NUM>. When the member to be rolled <NUM> is rolled by the rolling member <NUM>, the accommodating groove can prevent the member to be rolled <NUM> from moving, thereby ensuring the smooth progress of the rolling process.

Specifically, when the member to be rolled <NUM> is a rolled steel plate and an electrode sheet fixed on the rolled steel plate, the depth of the accommodating groove should be less than a sum of the thicknesses of the rolled steel plate and the electrode sheet. Therefore, when the rolled steel plate and the electrode sheet are placed in the accommodating groove, the electrode sheet may protrude from an edge of the accommodating groove, and at this time, a constant rolling pressure is capable of being applied to the electrode sheet through the rolling member <NUM>.

Therefore, the accommodating groove <NUM> can limit the position of the member to be rolled <NUM> to ensure that the position of the member to be rolled <NUM> remains stable in the rolling process, so that the rolling process is smoother.

Referring to <FIG> and <FIG> together, in some embodiments, the accommodating groove <NUM> has a closed end <NUM> and an open end <NUM> oppositely disposed in the first direction a. In a direction from the open end <NUM> to the closed end <NUM>, the closed end <NUM> is capable of limiting the position of the member to be rolled <NUM> in the accommodating groove <NUM>.

Different members to be rolled <NUM> have different lengths, and therefore, in order that the accommodating groove is capable of adapting to members to be rolled <NUM> in various specifications, the accommodating groove is provided with the closed end <NUM> and the open end <NUM> arranged oppositely. When the member to be rolled <NUM> is placed in the accommodating groove, if the length of the member to be rolled <NUM> is greater than the length of the accommodating groove, the member to be rolled <NUM> can stretch out from the open end <NUM> of the accommodating groove, which is also capable of achieving position limiting of the member to be rolled <NUM> through the accommodating groove.

Through the above structure, the accommodating groove is capable of adapting to members to be rolled <NUM> in different sizes, so that the application range of the rolling device <NUM> is wider.

In some embodiments, the base <NUM> is provided with a second position limiting member <NUM>, and the second position limiting member <NUM> is arranged corresponding to the open end <NUM> at an interval. In a direction from the closed end <NUM> to the open end <NUM>, the second position limiting member <NUM> is capable of limiting the position of the member to be rolled <NUM> in the accommodating groove <NUM>.

Specifically, the second position limiting member <NUM> is a bump corresponding to the open end <NUM> and arranged on the base <NUM> at an interval. When the member to be rolled <NUM> is placed in the accommodating groove, and the member to be rolled <NUM> is rolled by the rolling member <NUM>, the closed end <NUM> of the accommodating groove can cooperate with the second position limiting member <NUM> to realize the position limiting of the member to be rolled <NUM> in the first direction a, thereby ensuring the smooth progress of the rolling process.

In some embodiments, the rolling device <NUM> further includes an operating member <NUM> arranged on the rolling assembly <NUM>, and the operating member <NUM> is used for providing a force application position on the rolling assembly <NUM>.

When rolling is required, a certain external force may be applied to the rolling assembly <NUM> through the operating member <NUM>, so that it moves in the first direction a on the guide rail, thereby realizing the rolling for the member to be rolled <NUM>.

Specifically, the operating member <NUM> may be configured as a hand wheel, and includes two hand wheels respectively arranged at two opposite ends of the connecting element <NUM> in an extending direction of the connecting element <NUM>. Therefore, it is convenient to apply an external force to the connecting element <NUM>, so that the connecting element <NUM> drives the rolling member <NUM> to move in the first direction a, thereby improving the operability.

Based on the same concept as the above rolling device <NUM>, the present application provides a measuring device, including the above rolling device <NUM>.

When the present application is specifically used, firstly, the rolling member <NUM> is lifted up, so that a certain gap is generated between the rolling member <NUM> and the working surface <NUM>, and the member to be rolled <NUM> is placed in the accommodating groove on the working surface <NUM> from the gap. After the placement is completed, the rolling member <NUM> is released, and the rolling member <NUM> presses, under the action of its own gravity, against the member to be rolled <NUM>. An external force is applied at the position of the operating member <NUM>, so that the connecting element <NUM> moves in the first direction a on the guide rail, and drives the rolling member <NUM> to move synchronously.

In the moving process, the rolling member <NUM> rolls against the member to be rolled <NUM>, and the rolling pressure applied to the member to be rolled <NUM> is the gravity of the rolling member <NUM>. Therefore, the rolling pressure is always kept constant, and the precision of rolling is improved, thereby improving the accuracy of the subsequent shear force and bonding force measurement.

Claim 1:
A rolling device (<NUM>), comprising:
a base (<NUM>) having a working surface (<NUM>) for placing a member to be rolled (<NUM>);
a bracket (<NUM>) arranged on the base (<NUM>); and
a rolling assembly (<NUM>) movably mounted on the bracket (<NUM>) in a first direction (a), the rolling assembly (<NUM>) being used for providing a pressure to the member to be rolled (<NUM>) on the working surface (<NUM>);
wherein the first direction (a) is parallel to the working surface (<NUM>); wherein the rolling assembly (<NUM>) comprises a connecting element (<NUM>) and a rolling member (<NUM>), the connecting element (<NUM>) is movably mounted on the bracket (<NUM>) in the first direction (a), the rolling member (<NUM>) is rotatably arranged on the connecting element (<NUM>) around a rotating shaft, and an axial direction of the rotating shaft is parallel to the working surface (<NUM>);
wherein the connecting element (<NUM>) comprises a connecting main body (<NUM>) as well as a first connecting beam (<NUM>) and a second connecting beam (<NUM>) respectively arranged on the connecting main body (<NUM>), the first connecting beam (<NUM>) and the second connecting beam (<NUM>) are respectively located on two opposite sides of the rolling member (<NUM>) in the axial direction of the rotating shaft, and the first connecting beam (<NUM>) and the second connecting beam (<NUM>) are each provided with a through hole (<NUM>) for accommodating the rotating shaft;
characterized in that the through hole (<NUM>) is configured as a kidney-shaped hole extending in a third direction (c), and the third direction (c) is arranged to intersect the working surface (<NUM>).