Cutting device and battery manufacturing equipment

Abstract

The utility model relates to a cutting device and battery manufacturing equipment, and belongs to the technical field of battery manufacturing. The utility model provides a cutting device. The cutting device comprises a pair of cutters; the driving mechanism is configured to drive the pair of cutters to be mutually closed or opened in the first direction; the gap adjusting mechanism is configured to drive at least one of the pair of cutters to move in the second direction before the driving mechanism drives the pair of cutters to be opened, so that the movement gap between the pair of cutters is increased; wherein the first direction intersects with the second direction. The cutting device is provided with the gap adjusting mechanism, the abrasion degree of the cutting device can be reduced, and the service life of the cutting device is prolonged.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a cutting device and battery manufacturing equipment. Background Art

[0002] With the development of new energy vehicles, the technological level of the lithium battery industry is getting higher and higher, and the industrial manufacturing level of batteries is becoming more and more mature.

[0003] In the battery manufacturing process, a cutting device is required to cut the electrode sheets, but the service life of the cutter of the cutting device is very short. Utility Model Content

[0004] To this end, the present application proposes a cutting device and battery manufacturing equipment, which can increase the service life of the cutting device.

[0005] The first aspect embodiment of the present application proposes a cutting device, comprising: a pair of cutters; a driving mechanism, configured to drive the pair of cutters to close or open relative to each other along a first direction; and a gap adjustment mechanism, configured to drive at least one of the pair of cutters to move along a second direction before the driving mechanism drives the pair of cutters to open, so as to increase the movement gap between the pair of cutters; wherein the first direction and the second direction intersect.

[0006] The cutting device of the embodiment of the present application is provided with a gap adjustment mechanism, which can drive at least one of the pair of cutters to move in the second direction before the pair of cutters are opened to increase the movement gap between the pair of cutters. The pair of cutters will not contact each other during the opening process, thereby reducing the wear of the pair of cutters during the process of cutting the material strip, thereby improving the service life of the cutting device.

[0007] According to some embodiments of the present application, the first direction and the second direction are perpendicular.

[0008] In the above solution, the mutual closing direction of the pair of cutters is perpendicular to the movement gap adjustment direction of the cutters, so that the cutting device has a simple structure and is easy to design and process.

[0009] According to some embodiments of the present application, the gap adjustment mechanism is further configured to drive at least one of the pair of cutters to reset in a direction opposite to the second direction before the driving mechanism drives the pair of cutters to close.

[0010] In the above scheme, after a pair of cutters are closed, the gap adjustment mechanism can also drive at least one of the pair of cutters to reset, so that the movement gap between the pair of cutters is restored to a preset value, so that the pair of cutters can be opened again with the preset movement gap to cut the material strip, thereby ensuring the cutting quality of the material strip.

[0011] According to some embodiments of the present application, the pair of cutters are a first cutter and a second cutter respectively; the driving mechanism is configured to drive the first cutter to reciprocate along the first direction; and the gap adjusting mechanism is configured to drive the second cutter to move along the second direction and reset along the opposite direction of the second direction.

[0012] In the above scheme, the first cutter approaches or moves away from the second cutter by reciprocating along the first direction, so as to close or open the pair of cutters; the second cutter moves along the second direction to increase the movement gap between the pair of cutters, and resets along the opposite direction of the second direction to restore the gap between the pair of cutters to a preset value. The driving mechanism and the gap adjusting mechanism act on two cutters in the pair of cutters respectively, which can simplify the structure of the cutting device, and facilitate the design and processing of the cutting device.

[0013] According to some embodiments of the present application, the gap adjusting mechanism comprises: a driving member for driving the second cutter to move along the second direction; and an elastic resetting member for driving the second cutter to reset along the opposite direction of the second direction.

[0014] In the above scheme, the second cutter is driven to move by the driving member to increase the movement gap between the pair of cutters, which can reliably increase the movement gap between the pair of cutters and avoid secondary wear during the opening of the pair of cutters; the second cutter is driven to reset by the elastic resetting member, which can drive the second cutter to approach the first cutter by elastic force when the driving member is unloaded, so as to restore the movement gap to a preset value, which is simple in structure and easy to implement.

[0015] According to some embodiments of the present application, the cutting device further comprises a base; wherein the driving mechanism is fixed to the base, the driving mechanism is configured to drive the first cutter to move relative to the base, the second cutter is slidably mounted to the base along the second direction, and the gap adjusting mechanism is configured to drive the second cutter to move relative to the base.

[0016] In the above scheme, the driving mechanism and the second cutter are both mounted to the base, which can realize the connection of the cutting device with an external rack through the base, and can reduce the connection difficulty of the cutting device with the external rack.

[0017] According to some embodiments of the present application, the base is provided with a mounting hole, and the cutting device further comprises: a guide rod extending along the second direction, the guide rod being slidably arranged in the mounting hole, and one end of the guide rod being connected with the second cutter; wherein the driving member is sleeved on the guide rod.

[0018] In the above scheme, the guide rod is fixedly connected to the second cutter, and the guide rod is slidably installed on the base. When the driving member drives the second cutter to move relative to the base, it can limit the second cutter from moving in the second direction; and the driving member is sleeved on the guide rod, which can realize that the driving member drives the second cutter to move relative to the base in the second direction. The structure is simple and the assembly is convenient.

[0019] According to some embodiments of the present application, a limiting portion is provided at the other end of the guide rod, the elastic return member is sleeved on the guide rod, and both ends of the elastic return member are respectively in contact with the limiting portion and the base.

[0020] In the above solution, the elastic reset member is sleeved on the guide rod, which enables the elastic reset member to abut between the limit portion and the base along the second direction, so as to drive the second cutter fixedly connected to the guide rod to reset in the opposite direction of the second direction by acting on the limit portion.

[0021] According to some embodiments of the present application, the elastic return member and the driving member are both arranged in the mounting hole, and a protrusion is provided on the inner wall of the mounting hole, and two sides of the protrusion are respectively in contact with the elastic return member and the driving member.

[0022] In the above scheme, a protrusion is provided on the inner wall of the mounting hole, and the two sides of the protrusion are respectively in contact with the elastic return member and the driving member, so that both the elastic return member and the driving member can be accommodated in the mounting hole, making the structure of the gap adjustment mechanism compact and occupying a smaller space, and one end of the elastic return member and one end of the driving member are both in contact with the protrusion to achieve contact with the base.

[0023] According to some embodiments of the present application, the protrusion is an annular protrusion extending along the circumference of the mounting hole.

[0024] In the above solution, the protrusion is set as an annular protrusion extending along the circumference of the mounting hole, which can ensure that one end of the elastic reset member and one end of the driving member are evenly abutted against the protrusion along the circumference of the mounting hole.

[0025] According to some embodiments of the present application, the cutting device further includes: a slider fixed to the second cutter; a guide member fixed to the base and cooperating with the slider, the guide member being used to guide the slider to move along the second direction; wherein one end of the guide rod is connected to the slider.

[0026] In the above solution, the second cutter is slidably engaged with the guide member along the second direction via the slider, so that the sliding engagement between the second cutter and the base can be achieved simply and reliably.

[0027] According to some embodiments of the present application, the driving element is a piezoelectric ceramic.

[0028] In the above scheme, the piezoelectric ceramic undergoes a tiny deformation under the action of the electric field and reacts quickly, which can achieve high-precision spacing adjustment in a short time and timely drive the second cutter to move with high precision to accurately increase the movement gap of a pair of cutters.

[0029] According to some embodiments of the present application, the cutting device further includes: a guide plate fixed to the second cutter, for guiding the material strip into the gap between the first cutter and the second cutter.

[0030] In the above scheme, the guide plate can guide the material strip into the gap between the first cutter and the second cutter, so that the first cutter and the second cutter cut the material strip along the thickness direction of the material strip, reducing the area of ​​the cut surface of the material strip and improving the cutting quality of the material strip.

[0031] According to some embodiments of the present application, the driving mechanism is a voice coil motor.

[0032] In the above scheme, the voice coil motor has the advantages of small size, high speed and high acceleration response. It not only occupies a smaller installation space, but also can achieve high-precision driving of the first cutter to reciprocate at high speed along the first direction, which not only improves the cutting efficiency of the material strip, but also because the high-speed cutting condition can reduce the amount of metal dust generated during the cutting process, thereby improving the cutting quality of the material strip and extending the service life of the cutting device.

[0033] According to some embodiments of the present application, two driving mechanisms are provided, and the two driving mechanisms are spaced apart along a third direction, and the third direction is perpendicular to the first direction and the second direction.

[0034] In the above solution, the two driving mechanisms are spaced apart along the third direction, which can apply force to the first cutter evenly along the third direction, thereby preventing the first cutter from being skewed due to uneven force application in the third direction, thereby reducing the cutting quality of the material strip.

[0035] A third embodiment of the present application provides a battery manufacturing device, comprising:

[0036] A conveying device for conveying pole pieces;

[0037] The cutting device described in the embodiment of the first aspect of the present application is used to cut the pole piece.

[0038] In the battery manufacturing equipment of the embodiment of the present application, the cutting device has a gap adjustment mechanism, which can reduce the wear and tear caused by a pair of cutters cutting the material strip, has a good service life, and thus improves the service life of the battery manufacturing equipment.

[0039] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 Shown is an axonometric view of a cutting device from one perspective in some embodiments of the present application;

[0042] Figure 2 Shown is Figure 1 Cross-sectional view in the AA direction;

[0043] Figure 3 Shown is Figure 2 A partial enlarged view of point B in the middle;

[0044] Figure 4 Shown is Figure 3 A local enlarged view of point C in FIG;

[0045] Figure 5 Shown is Figure 1 Cross-sectional view in DD direction;

[0046] Figure 6 Shown is an axonometric view of a cutting device from another perspective according to some embodiments of the present application;

[0047] Figure 7 Shown is Figure 6 Cross-sectional view in the EE direction;

[0048] Figure 8 Shown is a workflow diagram of a first implementation of a cutting method in some embodiments of the present application;

[0049] Figure 9 Shown is a workflow diagram of a second implementation of the cutting method in some embodiments of the present application;

[0050] Figure 10 Shown is a schematic structural diagram of battery manufacturing equipment according to some embodiments of the present application.

[0051] In the drawings, the drawings are not drawn to scale.

[0052] Label description: 1000 - battery manufacturing equipment; 100 - cutting device; 110 - a pair of cutters; 111 - first cutter; 112 - second cutter; 120 - driving mechanism; 130 - gap adjusting mechanism; 131 - driving piece; 132 - elastic reset piece; 140 - base; 141 - first part; 142 - second part; 143 - third part; 144 - mounting hole; 1441 - inner wall; 1442 - protrusion; 14421 - first side; 14422 - second side; 1443 - first opening; 1444 - second opening; 150 - guide rod; 151 - limiting part; 160 - sliding block; 161 - through hole; 170 - guide piece; 171 - shell; 172 - cover; 173 - third opening; 180 - guide plate; 191 - first bracket; 192 - second bracket; 193 - third bracket; 194 - guide assembly; 200 - conveying device; Z - first direction; Z1 - positive direction of the first direction; Z2 - negative direction of the first direction; X - second direction; X1 - positive direction of the second direction; X2 - negative direction of the second direction; Y - third direction. DETAILED DESCRIPTION

[0053] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0054] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, rather than to describe a particular order or primary and secondary relationship.

[0055] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments.

[0056] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," "connected," and "attached" are to be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0057] The term "plurality" used in this application refers to two or more (including two).

[0058] The cutting device includes a pair of cutters arranged opposite each other, which together cut the electrode. The inventors found that the cutters of the cutting device are very prone to wear and have a very short service life. Therefore, to increase the service life of the cutters, the inventors used tools with higher hardness to prevent premature wear of the cutters. However, the service life of the cutters was not significantly extended. To this end, after long-term research, the inventors found that when the pair of cutters cut the electrode, hard dust in the active material layer on the surface of the electrode will fall off. When the pair of cutters close or open, the hard dust will be mixed in the gap between the pair of cutters, causing wear on the surface of the pair of cutters. Over time, the cutters are very prone to wear, which seriously reduces the service life of the cutting device.

[0059] In response to the above findings, the inventors considered increasing the movement gap of the pair of cutters during their opening process to prevent hard dust from abrading the surfaces of the pair of cutters during the cutting process, thereby increasing the service life of the cutting device.

[0060] Based on the above ideas, the present application provides a new technical solution to increase the movement gap between a pair of cutters before the pair of cutters are reset, thereby avoiding wear of the pair of cutters during the reset process and thereby increasing the service life of the cutting device.

[0061] To this end, the present application proposes a cutting device and a cutting method for cutting pole pieces, which can reduce the wear of the cutting device and increase the service life of the cutting device.

[0062] Figure 1 Shown is an axonometric view of a cutting device from one perspective in some embodiments of the present application; Figure 2 Shown is Figure 1 Cross-sectional view in the AA direction; Figure 3 Shown is Figure 2 A partial enlarged view of point B in the middle.

[0063] like Figure 1 、 Figure 2 and Figure 3As shown, some embodiments of the present application provide a cutting device 100, comprising a pair of cutters 110, a drive mechanism 120, and a gap adjustment mechanism 130. The drive mechanism 120 is configured to drive the pair of cutters 110 to close or open relative to each other along a first direction Z, and the gap adjustment mechanism 130 is configured to drive at least one of the pair of cutters 110 to move along a second direction X before the drive mechanism 120 drives the pair of cutters 110 to open, thereby increasing the movement gap between the pair of cutters 110. The first direction Z and the second direction X intersect.

[0064] A pair of cutters 110 closing together along the first direction Z means that the pair of cutters 110 approach each other in the first direction Z to cut the material strip; a pair of cutters 110 opening along the first direction Z means that the blades of the pair of cutters 110 move away from each other in the first direction Z to reset, ready for the next cutting of the material strip.

[0065] There are many ways to close or open the pair of cutters 110 along the first direction Z. One of the cutters 110 may move closer to or away from the other along the first direction Z, or both cutters may move in opposite directions simultaneously.

[0066] The movement gap between the pair of cutters 110 refers to the distance between the surfaces of the pair of cutters 110 that are close to each other in the second direction X.

[0067] There are various implementations for moving one of the pair of cutters 110 in the second direction X to increase the gap between the pair of cutters 110. For example, one of the pair of cutters 110 may be moved away from the other in the second direction X to increase the gap between the pair of cutters 110; or both cutters may be moved simultaneously in opposite directions to move away from each other.

[0068] The thickness direction of the pair of cutters 110 can be parallel to the second direction X, or can be inclined relative to the second direction X. The conveying direction of the material strip can be parallel to the second direction X, with the cutting device 100 cutting the material strip along its width. The conveying direction of the material strip can also be inclined relative to the second direction X, with the cutting device 100 cutting the material strip along its width. The first direction Z and the second direction X can be perpendicular to each other, or can be inclined relative to each other. The pair of cutters 110 can be conventional cutters or ultrasonic cutters. The drive mechanism 120 and the gap adjustment mechanism 130 can be electrically controlled drives to achieve automated cutting operations.

[0069] In some embodiments of the present application, the strip is a pole piece used to form a battery cell. In other embodiments, the strip can be a composite strip formed by laminating a pole piece and a separator, or can be other forms of metal strip or a composite strip including a metal interlayer.

[0070] The cutting device 100 of the embodiments of the present application is provided with a gap adjusting mechanism 130, which can drive at least one of the pair of cutters 110 to move in the second direction X before the pair of cutters 110 is opened, so as to increase the movement gap between the pair of cutters 110, and the pair of cutters 110 will not contact during the opening process, thereby reducing the wear of the pair of cutters 110 during the cutting of the material belt, and further improving the service life of the cutting device 100.

[0071] In some embodiments of the present application, the first direction Z and the second direction X are perpendicular.

[0072] The first direction Z can be a horizontal direction, a vertical direction or other directions. For example, the first direction Z is a vertical direction, and the second direction X is a horizontal direction, the material belt is conveyed in the horizontal direction, and the thickness direction of the material belt extends in the vertical direction; for another example, the first direction Z is a horizontal direction, and the second direction X is a vertical direction, the material belt is conveyed in the vertical direction, and the thickness direction of the material belt extends in the horizontal direction.

[0073] In the above scheme, the mutual closing direction of the pair of cutters 110 is perpendicular to the movement gap adjusting direction of the cutters, so that the cutting device 100 has simple structure, and is easy to design and process.

[0074] In some embodiments of the present application, the gap adjusting mechanism 130 is further configured to drive at least one of the pair of cutters 110 to reset in the second direction reverse direction X2 before the driving mechanism 120 drives the pair of cutters 110 to close.

[0075] The gap adjusting mechanism 130 is not only configured to drive at least one of the pair of cutters 110 to move in the second direction positive direction X1 before the pair of cutters 110 is opened, so as to increase the movement gap between the pair of cutters 110, but also configured to drive at least one of the pair of cutters 110 to move in the second direction reverse direction X2 after the pair of cutters 110 is opened to position, so as to reset the movement gap of the pair of cutters 110.

[0076] In the above scheme, after the pair of cutters 110 is closed, the gap adjusting mechanism 130 can further drive at least one of the pair of cutters 110 to reset, so as to restore the movement gap between the pair of cutters 110 to a preset value, so as to realize that the pair of cutters 110 is opened again to cut the material belt with a preset movement gap, and ensure the cutting quality of the material belt.

[0077] As Figure 2 and Figure 3As shown, in some embodiments of the present application, a pair of cutters 110 are respectively a first cutter 111 and a second cutter 112, and the driving mechanism 120 is configured to drive the first cutter 111 to move back and forth along the first direction Z; the gap adjustment mechanism 130 is configured to drive the second cutter 112 to move along the second direction X and reset along the opposite direction X2 of the second direction.

[0078] like Figure 3 As shown, the driving mechanism 120 is configured to drive the first cutter 111 to move along the first positive direction Z1 to approach the second cutter 112, thereby closing the first cutter 111 and the second cutter 112; and to drive the first cutter 111 to move away from the second cutter 112 along the first reverse direction Z2 to open the first cutter 111 and the second cutter 112. The gap adjustment mechanism 130 is configured to drive the second cutter 112 to move along the second positive direction X1 to increase the movement gap between the first cutter 111 and the second cutter 112, and to drive the second cutter 112 to move along the second reverse direction X2 to reset the movement gap between the first cutter 111 and the second cutter 112.

[0079] The driving mechanism 120 can be a variety of electrical components that drive the first cutter 111 to move linearly back and forth, such as a cylinder, an electric push rod, a cam mechanism, a motor, etc.

[0080] In the above scheme, the first cutter 111 moves back and forth along a first direction Z to move closer to or away from the second cutter 112, thereby closing or opening the first cutter 111 and the second cutter 112 relative to each other. The second cutter 112 moves along a second direction X to increase the movement gap between the first cutter 111 and the second cutter 112, and resets along a direction X2 opposite to the second direction to restore the gap between the first cutter 111 and the second cutter 112 to a preset value. The drive mechanism 120 acts on the first cutter 111, and the gap adjustment mechanism 130 acts on the second cutter 112, which can simplify the structure of the cutting device 100 and facilitate its design and processing.

[0081] In other embodiments, the drive mechanism 120 and the gap adjustment mechanism 130 may act solely on the first cutter 111 or the second cutter 112, or the first cutter 111 and the second cutter 112 may be provided with corresponding drive mechanisms 120 and gap adjustment mechanisms 130, respectively. As a preferred embodiment, along the conveying direction of the material strip, the first cutter 111 is located downstream of the second cutter 112. After the first cutter 111 and the second cutter 112 close together to cut the material strip, the cut end of the material strip is flush with the second cutter 112. The gap adjustment mechanism 130 may be configured to drive the first cutter 111 to move away from the second cutter 112 to increase the movement gap between the pair of cutters 110. This can not only prevent wear between the first cutter 111 and the second cutter 112, but also prevent wear between the first cutter 111 and the cross section of the material strip, further improving the cutting quality of the material strip and the service life of the cutting device 100.

[0082] like Figure 2 and Figure 3 As shown, in some embodiments of the present application, the gap adjustment mechanism 130 includes a driving member 131 and an elastic reset member 132, the driving member 131 is used to drive the second cutter 112 to move along the second direction X, and the elastic reset member 132 is used to drive the second cutter 112 to reset in the opposite direction X2 of the second direction.

[0083] The driving member 131 drives the second cutter 112 to move along the second direction X, which means that the driving member 131 drives the second cutter 112 to move along the positive direction X1 of the second direction. The driving member 131 is a driving mechanism 120 with the advantages of high precision and short response time, such as piezoelectric ceramics, electric push rods, motor screw nut mechanisms, etc. The elastic reset member 132 can accumulate elastic force when the driving member 131 drives the second cutter 112 to move along the positive direction X1 of the second direction, and release elastic force when the driving member 131 unloads force, so as to drive the second cutter 112 to reset along the reverse direction X2 of the second direction. The elastic reset member 132 can be a mechanical spring, a gas spring, etc. The driving member 131 and the elastic reset member 132 can be set independently, or they can be installed on the first cutter 111 and / or the second cutter 112 through the same connecting member (such as the guide rod 150 described below).

[0084] In the above scheme, the second cutter 112 is driven to move by the driving member 131 to increase the movement gap between the pair of cutters 110, which can reliably increase the movement gap between the pair of cutters 110 and avoid secondary wear during the opening process of the pair of cutters 110; the second cutter 112 is driven to reset by the elastic reset member 132, and the second cutter 112 can be driven to move closer to the first cutter 111 by the elastic force when the driving member 131 unloads the force, so that the movement gap is restored to a preset value. The structure is simple and easy to implement.

[0085] Figure 4 Shown is Figure 3 A local enlarged view of point C in FIG; Figure 5 Shown is Figure 1 Cross-sectional view in the DD direction.

[0086] like Figure 3 、 Figure 4 and Figure 5 As shown, in some embodiments of the present application, the cutting device 100 also includes a base 140, wherein the driving mechanism 120 is fixed to the base 140, the driving mechanism 120 is configured to drive the first cutter 111 to move relative to the base 140, the second cutter 112 is slidably mounted on the base 140 along the second direction X, and the gap adjustment mechanism 130 is configured to drive the second cutter 112 to move relative to the base 140.

[0087] The base 140 is used for fixed connection with an external frame and for installing the driving mechanism 120 , the first cutter 111 , the second cutter 112 and the like.

[0088] like Figure 5 As shown, the cutting device 100 further includes a first bracket 191 and a second bracket 192. The first cutter 111 is fixed to the first bracket 191, which is mounted on the execution end of the drive mechanism 120 to mount the first cutter 111 on the execution end of the drive mechanism 120. The second cutter 112 is fixed to the second bracket 192, which is slidably engaged with the base 140 along the second direction X to enable the second cutter 112 to be slidably mounted on the base 140 along the second direction X.

[0089] The gap adjustment mechanism 130 can be fixed to the base 140, and its execution end drives the second bracket 192 to move along the second positive direction X1; the gap adjustment mechanism 130 can also abut between the base 140 and the second bracket 192, and drive the second bracket 192 to move relative to the base 140 along the second positive direction X1 by changing its own length along the second direction X.

[0090] In the above solution, the driving mechanism 120 and the second cutter 112 are both mounted on the base 140 , so that the cutting device 100 can be connected to an external frame through the base 140 , thereby reducing the difficulty of connecting the cutting device 100 to the external frame.

[0091] like Figure 3 As shown, in some embodiments of the present application, the base 140 is provided with a mounting hole 144, and the cutting device 100 further includes a guide rod 150, which extends along the second direction X. The guide rod 150 is slidably passed through the mounting hole 144, and one end of the guide rod 150 is connected to the second cutter 112; wherein, the driving member 131 is sleeved on the guide rod 150.

[0092] The cross section of the guide rod 150 can be circular, oval or square, etc. The guide rod 150 is fixedly connected to the second bracket 192 to be connected to the second cutter 112 through the second bracket 192. The guide rod 150 is used to install the driving member 131.

[0093] like Figure 1 As shown, the base 140 includes a first portion 141, a second portion 142, and a third portion 143. The first portion 141 and the second portion 142 are spaced apart along a third direction Y. The third portion 143 connects the first portion 141 and the second portion 142. The first portion 141, the second portion 142, and the third portion 143 collectively enclose a cavity. The drive mechanism 120 is mounted on the third portion 143. The second bracket 192 and the second cutter 112 are accommodated in the cavity. The second bracket 192 slides along the second direction X with the first portion 141 and the second portion 142 at both ends along the third direction Y. The third direction Y is perpendicular to the first direction Z and the second direction X. The lengths of the first cutter 111 and the second cutter 112 both extend along the third direction Y.

[0094] like Figure 3 As shown, the mounting hole 144 extends through the first portion 141 along the second direction X. Specifically, the mounting hole 144 has a first opening 1443 and a second opening 1444 at either end. The first opening 1443 exposes the surface of the first portion 141, and the second opening 1444 can expose the surface of the first portion 141 or the wall of the notch in the first portion 141. One end of the guide rod 150 is exposed from the surface of the first portion 141 through the first opening 1443, while the other end extends from the second opening 1444 and is fixedly connected to the second bracket 192. The other end of the guide rod 150 can be directly connected to the second bracket 192 or indirectly connected via an intermediate connector.

[0095] The driving member 131 can be completely exposed to the outside of the mounting hole 144, with its two ends respectively abutting the outer surface of the base 140 and the second bracket 192; the driving member 131 can also be at least partially accommodated in the interior of the mounting hole 144, abutting against part of the structure of the base 140 (i.e., the protrusion 1442 described below) inside the mounting hole 144.

[0096] In the above scheme, the guide rod 150 is fixedly connected to the second cutter 112, and the guide rod 150 is slidably mounted on the base 140. When the driving member 131 drives the second cutter 112 to move relative to the base 140, it can limit the second cutter 112 from moving along the second direction X; and the driving member 131 is sleeved on the guide rod 150, which can realize that the driving member 131 drives the second cutter 112 to move relative to the base 140 along the second direction X. The structure is simple and the assembly is convenient.

[0097] like Figure 3 As shown, in some embodiments of the present application, a limiting portion 151 is provided at the other end of the guide rod 150, and the elastic return member 132 is sleeved on the guide rod 150, with both ends of the elastic return member 132 respectively abutting against the limiting portion 151 and the base 140.

[0098] The guide rod 150 can be a bolt comprising a head and a shaft, the head being configured as a stopper 151, the elastic return member 132 and the drive member 131 being sleeved on the shaft, and the tail end of the shaft being threadedly engaged with the second bracket 192. The guide rod 150 can also be a rod having an annular boss, the annular boss being configured as the stopper 151, the end of the rod being threadedly connected or clamped to the second bracket 192.

[0099] The elastic return member 132 can be completely exposed to the outside of the base 140, with one end of the elastic return member 132 abutting against the limiting portion 151 and the other end abutting against the outer surface of the base 140; the elastic return member 132 can also be at least partially accommodated inside the mounting hole 144, abutting against part of the structure of the base 140 (i.e., the protrusion 1442 described below) inside the mounting hole 144.

[0100] In the above scheme, the elastic reset member 132 is sleeved on the guide rod 150, so that the elastic reset member 132 can abut between the limiting portion 151 and the base 140 along the second direction X, so as to drive the second cutter 112 fixedly connected to the guide rod 150 to reset in the opposite direction of the second direction X by acting on the limiting portion 151.

[0101] like Figure 3 and Figure 4 As shown, in some embodiments of the present application, the elastic return member 132 and the driving member 131 are both arranged in the mounting hole 144, and a protrusion 1442 is provided on the inner wall 1441 of the mounting hole 144, and the two sides of the protrusion 1442 are respectively in contact with the elastic return member 132 and the driving member 131.

[0102] Specifically, along the second direction X, the guide rod 150 exposes the outer surface of the base 140 from the first opening 1443 and abuts against the elastic return member 132 through the limiting portion 151. It also exposes the outer surface of the base 140 from the second opening 1444 and is connected to the second bracket 192. Along the second direction X, the protrusion 1442 has two sides, a first side 14421 and a second side 14422, respectively. The first side 14421 faces the first opening 1443, and the second side 14422 faces the second opening 1444. One end of the driving member 131 abuts against the second side 14422, and the other side directly or indirectly abuts against the second bracket 192. Both ends of the elastic return member 132 abut between the limiting portion 151 and the first side 14421.

[0103] In the above scheme, a protrusion 1442 is provided on the inner wall 1441 of the mounting hole 144, and the two sides of the protrusion 1442 are respectively abutted against the elastic return member 132 and the driving member 131, so that the elastic return member 132 and the driving member 131 can be accommodated in the mounting hole 144, so that the structure of the gap adjustment mechanism 130 is compact and occupies a smaller space, and one end of the elastic return member 132 and one end of the driving member 131 are both abutted against the protrusion 1442 to achieve abutment with the base 140.

[0104] In some embodiments of the present application, the protrusion 1442 is an annular protrusion 1442 extending along the circumference of the mounting hole 144 .

[0105] The axial direction of the mounting hole 144 is parallel to the first direction Z, and the circumferential direction of the mounting hole 144 is a direction extending around the axial direction of the mounting hole 144. The guide rod 150 passes through the protrusion 1442 along the second direction X, and the driving member 131 and the elastic return member 132 abut against the protrusion 1442 to achieve abutment with the base 140.

[0106] In the above solution, the protrusion 1442 is set as an annular protrusion 1442 extending along the circumference of the mounting hole 144, so that one end of the elastic return member 132 and one end of the driving member 131 can be evenly abutted against the protrusion 1442 along the circumference of the mounting hole 144.

[0107] In other embodiments, a plurality of protrusions 1442 may be provided, and the plurality of protrusions 1442 are arranged at intervals along the circumference of the mounting hole 144 .

[0108] like Figure 3 As shown, in some embodiments of the present application, the cutting device 100 further includes a slider 160 and a guide member 170 . The slider 160 is fixed to the second cutter 112 . The guide member 170 is fixed to the base 140 and cooperates with the slider 160 . The guide member 170 is used to guide the slider 160 to move along the second direction X. One end of the guide rod 150 is connected to the slider 160 .

[0109] Specifically, the slider 160 is fixedly connected to the second bracket 192. The slider 160 has a through hole 161 extending along the first direction Z. The guide rod 150 is inserted into the through hole 161 and threadedly engages with the through hole 161, thereby achieving a fixed connection between the guide rod 150 and the second cutter 112 via the slider 160. The first portion 141 of the base 140 also has a groove extending along the third direction Y. The slider 160 is disposed in the groove, and the second opening 1444 of the mounting hole 144 exposes the groove wall.

[0110] The guide member 170 is fixedly connected to the base 140, and the guide member 170 and the slider 160 slide together along the second direction X. The guide member 170 includes a housing 171 and a cover 172 (see Figure 1), the housing 171 and the cover 172 are mounted on both sides of the first portion 141 along the third direction Y. The housing 171 is fixedly disposed within the groove and has a third opening 173 corresponding to the second opening 1444 of the mounting hole 144. The housing 171 defines a receiving cavity, within which the slider 160 is slidably mounted along the second direction X, with its sliding limit position limited by the inner wall 1441 of the receiving cavity. One end of the driving member 131 extends through the third opening 173 into the receiving cavity to abut against the slider 160.

[0111] The housing 171 is disposed in the cavity of the base 140 , and the cover 172 is connected to the base 140 from the outside of the base 140 via screws to seal the slider 160 in the accommodating cavity of the housing 171 .

[0112] The guide rod 150, the gap adjustment mechanism 130, the slider 160, and the guide member 170 form a gap adjustment unit. The gap adjustment unit not only enables sliding engagement between the base 140 and the second cutter 112 along the second direction X, but also drives the second cutter 112 to move relative to the base 140 along the second direction X. In some embodiments of the present application, two gap adjustment units are provided: one gap adjustment unit is provided on the first portion 141, and the other gap adjustment unit is provided on the second portion 142. The two gap adjustment units respectively drive the second bracket 192 to move along the second direction X from both ends of the second bracket 192 along the third direction Y. In other embodiments, only one gap adjustment unit may be provided: the first portion 141 is equipped with the gap adjustment unit, and the second portion 142 slides with the base 140 solely via the slider 160 and the guide member 170, without providing a corresponding gap adjustment mechanism 130.

[0113] In the above solution, the second cutter 112 is slidably engaged with the guide member 170 along the second direction X via the slider 160 , so that the sliding engagement between the second cutter 112 and the base 140 can be achieved simply and reliably.

[0114] In other embodiments, the second bracket 192 and the base 140 may also be slidably engaged with each other via a guide rail assembly.

[0115] According to some embodiments of the present application, the driving member 131 is a piezoelectric ceramic.

[0116] Piezoelectric ceramics utilize their material properties to undergo mechanical deformation under voltage, and polarization caused by the relative displacement of internal positive and negative charge centers under mechanical stress, resulting in the piezoelectric effect. When powered, the piezoelectric ceramic can grow in the direction of the two electrodes (i.e., the second direction X), and shrink to its original size when powered off.

[0117] like Figure 3As shown, the piezoelectric ceramic is sleeve-shaped and sleeved around the guide rod 150, with its ends respectively contacting the protrusion 1442 and the slider 160. When powered on, the piezoelectric ceramic lengthens, driving the second bracket 192 to move along the second positive direction X1, thereby increasing the clearance between the first cutter 111 and the second cutter 112. When powered off, the piezoelectric ceramic shortens, releasing the second cutter 112. The elastic return member 132 then returns the second cutter 112 to its original position in the second negative direction X2.

[0118] In the above scheme, the piezoelectric ceramic undergoes a small deformation under the action of the electric field and reacts quickly, which can achieve high-precision spacing adjustment in a short time and timely drive the second cutter 112 to move with high precision to accurately increase the movement gap of the pair of cutters 110.

[0119] Figure 6 Shown is an axonometric view of a cutting device from another perspective according to some embodiments of the present application; Figure 7 Shown is Figure 6 Cross-sectional view in the EE direction.

[0120] like Figure 6 and Figure 7 As shown, in some embodiments of the present application, the cutting device 100 further includes a guide plate 180 , which is fixed to the second cutter 112 and is used to guide the material strip into the gap between the first cutter 111 and the second cutter 112 .

[0121] The guide plate 180 is arranged on the material input side of the pair of cutters 110 and is used to correct the conveying direction of the material strip before it enters the gap between the first cutter 111 and the second cutter 112 so that it is conveyed along the second direction X and the thickness direction is parallel to the first direction Z.

[0122] Two guide plates 180 may be provided, one of which is fixed to the first portion 141 of the base 140, and the other is fixed to the second bracket 192. A gap is formed between the two guide plates 180 for the feed tape to pass through. Along the second direction X, one end of each guide plate 180 is adjacent to the pair of cutters 110, and the other end is flared to guide the feed tape into the gap between the two guide plates 180.

[0123] Only one guide plate 180 may be provided. The guide plate 180 is fixed to the second bracket 192 and is used to guide the material strip into the gap between the pair of cutters 110 .

[0124] In the above scheme, the guide plate 180 can guide the material strip into the gap between the first cutter 111 and the second cutter 112, so that the first cutter 111 and the second cutter 112 cut the material strip along the thickness direction of the material strip, reducing the area of ​​the cut surface of the material strip and improving the cutting quality of the material strip.

[0125] In some embodiments of the present application, the driving mechanism 120 is a voice coil motor.

[0126] The voice coil motor is a kind of direct drive motor, which can realize high-speed reciprocating linear motion by generating force through the energized coil in the magnetic field.

[0127] The cutting device 100 further comprises a third support 193 and a guide assembly 194, the third support 193 is fixed to the third part 143 of the base 140, the driving mechanism 120 is fixed to the third support 193, the third part 143 of the base 140 is provided with an opening extending along the first direction Z, and the guide assembly 194 is fixed to the base 140 and arranged in the opening, the output shaft of the voice coil motor passes through the inner hole of the guide assembly 194 and is connected to the first support 191 through a threaded member. The voice coil motor can drive the first support 191 to reciprocate along the first direction Z, thereby driving the first cutter 111 to reciprocate along the first direction Z.

[0128] In the above scheme, the voice coil motor has the advantages of small size, high speed and high acceleration response, which not only occupies a small installation space, but also realizes high-precision driving of the first cutter 111 to reciprocate along the first direction Z at high speed, thereby improving the cutting efficiency of the material belt, reducing the amount of metal dust generated during cutting under high-speed cutting conditions, improving the cutting quality of the material belt, and prolonging the service life of the cutting device 100.

[0129] As shown in Figure 6 and Figure 7 In some embodiments of the present application, two driving mechanisms 120 are provided, and the two driving mechanisms 120 are arranged at intervals along the third direction Y, and the third direction Y is perpendicular to the first direction Z and the second direction X.

[0130] The length direction of the first cutter 111 and the second cutter 112 extends along the third direction Y. Each driving mechanism 120 is installed on the base 140 through a third support 193 and a guide assembly 194.

[0131] In the above scheme, the two driving mechanisms 120 are arranged at intervals along the third direction Y, which can uniformly apply force to the first cutter 111 along the third direction Y, thereby avoiding the first cutter 111 from being skewed due to uneven force in the third direction Y, and further reducing the cutting quality of the material belt.

[0132] Figure 8 The working flowchart shown is the first embodiment of the cutting method of some embodiments of the present application; Figure 9 The working flowchart shown is the second embodiment of the cutting method of some embodiments of the present application.

[0133] As Figure 8 As shown, some embodiments of the present application provide a cutting method, including:

[0134] S100: driving a pair of cutters 110 to close to each other along a first direction Z to cut the material strip;

[0135] S200: driving at least one of the pair of cutters 110 to move along the second direction X to increase the movement gap between the pair of cutters 110, where the first direction Z and the second direction X intersect;

[0136] S300: driving the pair of cutters 110 to open in a direction Z2 opposite to the first direction.

[0137] It is understandable that the cutting methods of some embodiments of the present application can be implemented, but are not limited to, using the cutting devices 100 of some embodiments of the present application. The cutting methods of some embodiments of the present application are described in detail below in conjunction with the cutting devices 100 of some embodiments of the present application.

[0138] In some embodiments of the present application, S100: driving a pair of cutters 110 to close together along a first direction Z to cut the material strip includes:

[0139] S110: The first cutter 111 switches between the extended position and the retracted position along the first direction Z. When the first cutter 111 of the driving mechanism 120 moves along the first positive direction Z1 to the extended position, the pair of cutters 110 close to each other, and the driving mechanism 120 sends an extension signal.

[0140] In some embodiments of the present application, S200: driving at least one of the pair of cutters 110 to move along the second direction X to increase the movement gap between the pair of cutters 110, the first direction Z and the second direction X intersecting, including:

[0141] S210 : The driving member 131 responds to the extension signal and is energized to extend along the second direction X, driving the second cutter 112 to move along the second positive direction X1 relative to the base 140 to increase the movement gap between the first cutter 111 and the second cutter 112 .

[0142] In some embodiments of the present application, S300: driving the pair of cutters 110 to open in a direction Z2 opposite to the first direction, includes:

[0143] S310: The driving member 131 drives the second cutter 112 to move to the position along the second positive direction X1 and sends a position signal. The driving mechanism 120 responds to the position signal and drives the first cutter 111 to move to the retracted position along the first reverse direction Z2 to open the pair of cutters 110.

[0144] During the process of cutting the material strip using the cutting method of an embodiment of the present application, the pair of cutters 110 increase their movement gap before opening, so that the pair of cutters 110 will not contact each other during the opening process, thereby reducing the wear of the pair of cutters 110 during the process of cutting the material strip, thereby improving the service life of the cutting device 100.

[0145] like Figure 8 As shown, in some embodiments of the present application, after S300: driving the pair of cutters 110 to open in the opposite direction Z2 to the first direction, the cutting method further includes:

[0146] S400: driving at least one of the pair of cutters 110 to return in the second direction opposite to the direction X2.

[0147] Further, S200: driving at least one of the pair of cutters 110 to move along the second direction X to increase the movement gap between the pair of cutters 110, the first direction Z and the second direction X intersecting, including:

[0148] S220 : The elastic return member 132 is compressed in the second direction X to accumulate elastic force.

[0149] Furthermore, S300: driving the pair of cutters 110 to open in a direction Z2 opposite to the first direction, further comprising:

[0150] S320 : The driving mechanism 120 drives the first cutter 111 to move in the direction Z2 opposite to the first direction to the retracted position and sends a retracting signal.

[0151] Furthermore, S400: driving at least one of the pair of cutters 110 to reset in the opposite direction of the second direction X, including:

[0152] S410: The driving member 131 responds to the retraction signal and cuts off the power supply, and restores the original length to release the second cutter 112;

[0153] S420: The elastic restoring member 132 recovers its deformation along the second direction X and drives the second cutter 112 to reset in the opposite direction of the second direction X by using its elastic force.

[0154] In the above solution, after the pair of cutters 110 are opened, driving at least one of the pair of cutters 110 to reset in the opposite direction of the second direction X can restore the cutter spacing when cutting the material strip, thereby ensuring the cutting accuracy when the pair of cutters 110 are closed next time.

[0155] Figure 10 Shown is a schematic structural diagram of battery manufacturing equipment according to some embodiments of the present application.

[0156] like Figure 10As shown, some embodiments of the present application provide a battery manufacturing device 1000, comprising a cutting device 100 and a conveying device 200. The conveying device 200 is used to convey electrode sheets, and the cutting device 100 is used to cut electrode sheets.

[0157] In the battery manufacturing equipment 1000 of the embodiment of the present application, the cutting device 100 has a gap adjustment mechanism 130, which can reduce the wear and tear caused by a pair of cutters 110 during the process of cutting the material strip, has a good service life, and thus improves the service life of the battery manufacturing equipment 1000.

[0158] like Figures 1 to 10 As shown, some embodiments of the present application provide a cutting device 100, comprising a pair of cutters 110, a drive mechanism 120, a gap adjustment mechanism 130, a base 140, a sliding assembly, a guide rod 150, a first bracket 191, a second bracket 192, a third bracket 193, and a guide assembly 194. The pair of cutters 110 includes a first cutter 111 and a second cutter 112, which are arranged opposite each other. The first cutter 111 is mounted on the first bracket 191, and the second cutter 112 is mounted on the second bracket 192. The drive mechanism 120 is a voice coil motor, which is fixed to the base 140 via the third bracket 193. The base 140 is also mounted with a guide assembly 194, which is a needle roller guide bushing. The output shaft of the drive mechanism 120 passes through the guide assembly 194 and moves along a first direction Z under the restraint of the guide assembly 194. Two drive mechanisms 120 are provided, spaced apart along the third direction Y. The output shafts of both drive mechanisms 120 are connected to the first bracket 191, jointly driving the first cutter 111 to reciprocate along the first direction Z. The second bracket 192, at each end along the third direction Y, is slidably mounted to the base 140 along the second direction X via a sliding assembly. The sliding assembly comprises a slider 160 and a guide member 170. The guide member 170 is mounted to the base 140. The slider 160 is slidably mounted on the guide member 170 along the second direction X, and the inner wall of the guide member 170 limits the sliding limit of the slider 160. The base 140 is provided with a mounting hole 144 having a protrusion 1442 on its inner wall. A guide rod 150 extends through the mounting hole 144 along the second direction X. The guide rod 150 is a bolt with a stopper 151 formed on its head. The end of the bolt is threadedly engaged with the slider 160. The gap adjustment mechanism 130 includes a driver 131 and an elastic return member 132. The driver 131 is made of precision piezoelectric ceramic, and the elastic return member 132 is a straight spring. Both the driver 131 and the elastic return member 132 are sleeved on the guide rod 150. The driver 131 abuts between the protrusion 1442 and the slider 160, while the elastic return member 132 abuts between the stop portion 151 and the protrusion 1442.

[0159] When the driving mechanism 120 drives the first cutter 111 to perform a vertical stroke along the positive direction of the first direction Z1, the driving member 131 is powered off and does not work, and the first cutter 111 and the second cutter 112 have a movement gap suitable for cutting in the second direction X; after the first cutter 111 completes the stroke action, the driving member 131 is powered on and lengthened, pushing the second cutter 112 to deviate relative to the base 140 along the positive direction of the second direction X1, and compressing the elastic return member 132, thereby increasing the movement gap between the first cutter 111 and the second cutter 112 in the second direction X. When the driving member 131 remains powered on, the driving mechanism 120 drives the first cutter 111 to start a return motion along the opposite direction Z2 of the first direction. During the return motion, the gap between the first cutter 111 and the second cutter 112 increases, and no wear will occur even in the presence of hard dust. After the return motion of the first cutter 111 is completed, the driving member 131 is powered off to restore the original length, and the elastic reset member 132 releases the elastic force to drive the second cutter 112 to reset, ready for the next cutting action.

[0160] In the cutting device 100 of the embodiment of the present application, precision piezoelectric ceramics are used as the driving component 131, which can adjust the movement gap between the pair of cutters 110 with high precision and quickly after the pair of cutters 110 cut the material strip, so that no secondary wear will occur during the opening and resetting of the pair of cutters 110, thereby improving the cutting quality of the material strip and the service life of the cutting device 100.

[0161] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A cutting device, characterized in that: include: a pair of cutting knives; a driving mechanism configured to drive the pair of cutters to close or open relative to each other along a first direction; as well as a gap adjustment mechanism configured to drive at least one of the pair of cutters to move in a second direction to increase a movement gap between the pair of cutters before the drive mechanism drives the pair of cutters to open; The first direction and the second direction intersect.

2. The cutting device according to claim 1, characterized in that: The first direction and the second direction are perpendicular.

3. The cutting device according to claim 1, characterized in that: The gap adjustment mechanism is further configured to drive at least one of the pair of cutters to reset in a direction opposite to the second direction before the drive mechanism drives the pair of cutters to close.

4. The cutting device according to claim 3, characterized in that: The pair of cutters are respectively a first cutter and a second cutter; The driving mechanism is configured to drive the first cutter to reciprocate along the first direction; The gap adjustment mechanism is configured to drive the second cutter to move along the second direction and to return in a direction opposite to the second direction.

5. The cutting device according to claim 4, characterized in that: The gap adjustment mechanism includes: a driving member, configured to drive the second cutter to move along the second direction; The elastic reset member is used to drive the second cutter to reset in the opposite direction of the second direction.

6. The cutting device according to claim 5, characterized in that: The cutting device also includes a base; Wherein, the driving mechanism is fixed to the base, the driving mechanism is configured to drive the first cutter to move relative to the base, the second cutter is slidably mounted on the base along the second direction, and the gap adjustment mechanism is configured to drive the second cutter to move relative to the base.

7. The cutting device according to claim 6, characterized in that: The base is provided with a mounting hole, and the cutting device further comprises: a guide rod extending along the second direction, the guide rod being slidably disposed in the mounting hole, and one end of the guide rod being connected to the second cutter; Wherein, the driving member is sleeved on the guide rod.

8. The cutting device according to claim 7, characterized in that: The other end of the guide rod is provided with a limiting portion, the elastic reset member is sleeved on the guide rod, and the two ends of the elastic reset member are respectively in contact with the limiting portion and the base.

9. The cutting device according to claim 8, characterized in that: The elastic return member and the driving member are both arranged in the mounting hole. A protrusion is provided on the inner wall of the mounting hole. Two sides of the protrusion are respectively in contact with the elastic return member and the driving member.

10. The cutting device according to claim 9, characterized in that: The protrusion is an annular protrusion extending along the circumference of the mounting hole.

11. The cutting device according to claim 7, characterized in that: The cutting device also includes: a slider fixed to the second cutter; a guide member fixed to the base and cooperating with the slider, the guide member being used to guide the slider to move along the second direction; Wherein, one end of the guide rod is connected to the slider.

12. The cutting device according to claim 5, characterized in that: The driving element is piezoelectric ceramic.

13. The cutting device according to any one of claims 4 to 12, characterized in that: The cutting device also includes: The guide plate is fixed to the second cutter and is used to guide the material strip into the gap between the first cutter and the second cutter.

14. The cutting device according to any one of claims 1 to 12, characterized in that: The driving mechanism is a voice coil motor.

15. The cutting device according to any one of claims 1 to 12, characterized in that: Two driving mechanisms are provided, and the two driving mechanisms are spaced apart along a third direction, and the third direction is perpendicular to the first direction and the second direction.

16. A battery manufacturing device, characterized in that: include: A conveying device for conveying pole pieces; The cutting device according to any one of claims 1 to 15, used for cutting the pole piece.

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