Unwinding mechanism, reel changing device and battery cell winding equipment

Abstract

The invention relates to the technical field of battery processing equipment, in particular to an unwinding mechanism, a reel changing device and battery cell winding equipment. An unwinding mechanism comprises an unwinding assembly, a winding assembly, a driving assembly and a driving assembly, the unwinding assembly comprises an unwinding shaft, the unwinding shaft is rotatably arranged, and the unwinding shaft comprises a material winding section; and the roll preparation assembly comprises a feeding assembly and a sleeve, and the sleeve is arranged on the unwinding shaft in a sleeving mode and located on one side of the material roll section in the axial direction of the unwinding shaft. According to the unwinding mechanism, the unwinding speed of the unwinding shaft can be increased while the manufacturing cost of the unwinding shaft is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery processing equipment, and particularly relates to an unwinding mechanism, a roll-changing device, and a battery core winding equipment. Background Art

[0002] An unwinding mechanism is a mechanism for unwinding a strip to the downstream. The unwinding mechanism usually includes an unwinding shaft, and a strip roll is sleeved on the unwinding shaft to unwind the strip to the downstream. In the related art, for the continuity of unwinding, a plurality of strip rolls are axially sleeved on the unwinding shaft. When one of the strip rolls is completely unwound, a new strip roll is pushed to continue unwinding. Since a plurality of strip rolls are sleeved on the unwinding shaft, the unwinding shaft needs to bear the weights of the plurality of strip rolls, resulting in a large radial force on the unwinding shaft, high requirements for the mechanical strength of the unwinding shaft, an increase in the manufacturing cost of the unwinding shaft, and the plurality of strip rolls also affecting the unwinding speed of the unwinding shaft. Summary of the Invention

[0003] The present application discloses an unwinding mechanism, a roll-changing device, and a battery core winding equipment, which can reduce the manufacturing cost of the unwinding shaft and improve the unwinding speed of the unwinding shaft at the same time.

[0004] To achieve the above object, in a first aspect, the present application discloses an unwinding mechanism, including:

[0005] An unwinding assembly, the unwinding assembly includes an unwinding shaft, the unwinding shaft is rotatably arranged, and the unwinding shaft includes a strip roll section; and,

[0006] A spare roll assembly, the spare roll assembly includes a loading assembly and a sleeve, the sleeve is sleeved on the unwinding shaft and is located on one side of the strip roll section along the axial direction of the unwinding shaft.

[0007] Since the sleeve is sleeved on the unwinding shaft and is located on one side of the strip roll section along the axial direction of the unwinding shaft, when the unwinding shaft starts to rotate and the strip in the strip roll on the strip roll section is unwound to the downstream, the unwinding shaft only needs to drive the strip roll sleeved on itself to rotate, and does not need to drive the strip roll sleeved on the sleeve to rotate together. Generally speaking, the unwinding shaft only needs to bear the weight of one strip roll sleeved on the unwinding shaft, and the weight of the strip roll sleeved on the sleeve is borne by the sleeve. In this way, on the one hand, the requirements for the mechanical strength of the unwinding shaft can be reduced, and thus the manufacturing cost of the unwinding shaft can be reduced. On the other hand, since the load-bearing of the unwinding shaft is small, the unwinding speed of the unwinding shaft can be increased to a certain extent.

[0008] Optionally, the sleeve is used for carrying the strip roll, and the loading assembly is used for driving the strip roll to move along the axial direction of the unwinding shaft.

[0009] Optionally, the loading assembly includes:

[0010] A driving component; and,

[0011] A pusher, the pusher is connected to the driving component, and the driving component is used to drive the pusher to move axially along the unwinding shaft.

[0012] Optionally, a cushion block is arranged on one side of the pusher facing the coil section.

[0013] By arranging a cushion block on one side of the pusher facing the coil section, in this way, when the coil is pushed by the pusher, the coil will contact the cushion block instead of directly contacting the pusher. In this way, on the one hand, the cushion block can play a role in protecting the pusher, thus avoiding the situation of damage to the pusher. When the cushion block is damaged, it can be directly replaced, which can reduce the maintenance cost. On the other hand, the contact between the cushion block and the coil is a flexible contact, thus avoiding the situation of scratching the coil.

[0014] Optionally, the pusher is sleeved on the sleeve.

[0015] By sleeving the pusher on the sleeve, when the coil on the sleeve is pushed by the pusher, the pusher can form a full-circle contact with one end of the coil. In this way, on the one hand, the contact area between the pusher and the coil can be made larger, thereby avoiding the situation of deformation due to excessive local force on the coil. On the other hand, the force on the entire circle of the coil can be made more balanced, so as to better ensure that the coil can be smoothly and smoothly pushed along the axial direction of the unwinding shaft to the coil section.

[0016] Optionally, the pusher is located on at least one side of the sleeve along the radial direction of the sleeve.

[0017] Optionally, the spare coil assembly further includes:

[0018] A clamping component, the clamping component includes a first driving member and a first abutting member. The first driving member is arranged on the pusher, and the first abutting member is connected to the first driving member. The first driving member is used to drive the first abutting member to move towards or away from the sleeve.

[0019] Since the first abutting member is connected to the first driving member and the first driving member can drive the first abutting member to move towards or away from the sleeve, when the pusher pushes the coil on the sleeve to move axially relative to the sleeve along the unwinding shaft, the first driving member can drive the first abutting member to move towards the sleeve, so that the first abutting member abuts against the coil on the sleeve. In this way, the first abutting member is similar to a human hand supporting the coil, thus avoiding the situation of the coil shaking relative to the sleeve during the process of moving axially relative to the sleeve along the unwinding shaft.

[0020] Optionally, the number of the clamping assemblies is plural, and the plural clamping assemblies are arranged at intervals around the outer peripheral wall of the sleeve.

[0021] By making the number of the clamping assemblies plural and arranging the plural clamping assemblies at intervals around the outer peripheral wall of the sleeve, the plural first abutting members can support the material roll from multiple angles and positions, so that the situation that the material roll shakes relative to the sleeve can be better avoided.

[0022] Optionally, the unwinding mechanism further includes a mounting member, and the pusher is slidably arranged on the mounting member along the axial direction of the unwinding shaft.

[0023] Optionally, the unwinding shaft further includes:

[0024] A connecting section, the connecting section is connected to the material roll section, the sleeve is sleeved on the connecting section, and the outer diameter of the connecting section is smaller than the outer diameter of the material roll section.

[0025] Optionally, the unwinding shaft further includes:

[0026] A connecting section, the connecting section is connected to the material roll section, the sleeve is sleeved on the connecting section, and the outer diameter of the connecting section is smaller than the outer diameter of the material roll section.

[0027] By making the outer diameter of the connecting section smaller than the outer diameter of the material roll section, on the one hand, it is convenient to sleeve the sleeve on the connecting section, and on the other hand, the whole unwinding shaft can be made lighter.

[0028] Optionally, the sleeve is coaxially arranged with the material roll section, and the diameter of the sleeve is equal to the diameter of the material roll section.

[0029] In this way, on the one hand, it can be ensured that when the pusher pushes the material roll on the sleeve, the material roll can smoothly transition from the sleeve to the unwinding shaft, and on the other hand, it can also be ensured that after the material roll is pushed onto the material roll section of the unwinding shaft, the material roll can be stably sleeved on the material roll section of the unwinding shaft.

[0030] Optionally, a material blocking member is arranged on the outer peripheral wall of the sleeve, and the material blocking member protrudes from the outer peripheral wall of the sleeve along the radial direction of the sleeve.

[0031] Since the material blocking member protrudes from the outer peripheral wall of the sleeve along the radial direction of the sleeve, when sleeving the material roll on the sleeve, as long as one end of the material roll abuts against the material blocking member, it can be considered that the material roll is installed in place on the sleeve at this time, so that the repeated installation accuracy of the material roll on the sleeve can be ensured.

[0032] Optionally, rolling members are arranged on the outer peripheral wall of the sleeve.

[0033] By providing rolling elements on the outer peripheral wall of the sleeve, the friction between the coil and the outer peripheral wall of the sleeve can be changed from static friction to rolling friction, thereby reducing the frictional force between the coil and the outer peripheral wall of the sleeve, and making the movement of the coil along the axial direction of the unwinding shaft relative to the sleeve smoother.

[0034] Optionally, the number of the rolling elements is multiple, and the multiple rolling elements are arranged at intervals along the axial direction parallel to the sleeve to form a rolling element group.

[0035] Optionally, multiple groups of the rolling element groups are arranged at intervals along the circumferential direction of the sleeve.

[0036] By arranging multiple groups of rolling element groups at intervals along the circumferential direction of the sleeve, the frictional force between each position on the outer peripheral wall of the sleeve and the coil can be made relatively small, thereby making the movement of the coil along the axial direction of the unwinding shaft relative to the sleeve smoother.

[0037] Optionally, the spare coil assembly further includes:

[0038] A limiting assembly, the limiting assembly includes a connecting rod and a second driving member, the second driving member is arranged on the mounting member, an installation groove extending along the axial direction of the sleeve is arranged on the outer peripheral wall of the sleeve, and the connecting rod is rotatably arranged in the installation groove around the hinge portion;

[0039] The connecting rod includes a first end and a second end, the first end and the second end are located on both sides of the hinge portion, and the first end is close to the coil section, a limiting member is arranged on the first end, and the second driving member is connected to the second end.

[0040] When the limiting member protrudes from the outer peripheral wall of the sleeve, the limiting member can block the coil sleeved on the sleeve from sliding along the unwinding axis towards the coil section. In this way, when the material tape in the coil on the coil section has not been completely unwound, the limiting member can be made to protrude from the outer peripheral wall of the sleeve, thereby avoiding the abnormal sliding of the coil on the sleeve to the coil section under the action of vibration or the like, which affects the normal unwinding of the coil section, and further making the operation of the unwinding mechanism more reliable.

[0041] When the material tape in the coil on the coil section is completely unwound, the second driving member can drive the connecting rod to rotate around the hinge portion through the second end, so that the limiting member is received in the installation groove. In this way, the blocking effect of the limiting member on the coil will disappear, which is beneficial for the pusher to push the coil sleeved on the sleeve to the coil section.

[0042] Optionally, the second driving member is used to drive the connecting rod to rotate around the hinge portion through the second end, so that the limiting member protrudes from the outer peripheral wall of the sleeve or is received in the installation groove.

[0043] Optionally, the unwinding mechanism further includes a mounting member, and the unwinding assembly further includes:

[0044] A support base slidably disposed on the mounting member along an axis parallel to the unwinding shaft, and the unwinding shaft is rotatably disposed on the support base;

[0045] A third driving member disposed on the support base and connected to the unwinding shaft for driving the unwinding shaft to rotate; and,

[0046] A fourth driving member disposed on the mounting member and connected to the support base for driving the support base to slide along an axis parallel to the unwinding shaft.

[0047] Since the support base is slidably disposed on the mounting member along an axis parallel to the unwinding shaft, and the fourth driving member is disposed on the mounting member and connected to the support base, the fourth driving member can drive the support base to slide along an axis parallel to the unwinding shaft, thereby driving the unwinding shaft to slide along its own axis. When the unwinding shaft slides along its own axis, it can correct the position of the strip in the width direction of the strip.

[0048] Optionally, the sleeve is fixed to the mounting member, and the support base and the sleeve are located on both sides of the mounting member along the axis of the unwinding shaft.

[0049] By arranging the support base and the sleeve on both sides of the mounting member along the axis of the unwinding shaft, the support base and the sleeve can respectively make full use of the space on both sides of the mounting member, making the structural layout of the entire unwinding mechanism more compact.

[0050] In a second aspect, the present application discloses a roll-changing device, including:

[0051] Any one of the unwinding mechanisms in the first aspect above.

[0052] Since the unwinding shaft of the unwinding mechanism has a relatively low manufacturing cost and a relatively high unwinding speed, when the roll-changing device includes this unwinding mechanism, the cost of the entire roll-changing device can be reduced to a certain extent, and the unwinding efficiency of the entire roll-changing device can be improved.

[0053] Optionally, the number of the unwinding mechanisms is multiple.

[0054] When the number of the unwinding mechanisms is multiple, the multiple unwinding mechanisms can unwind alternately. Therefore, the continuity of unwinding is better.

[0055] In a third aspect, the present application discloses a battery cell winding device, including any one of the roll-changing devices in the second aspect above.

[0056] Since the rewinding device has a low cost and a high unwinding efficiency, when the battery core winding device includes the rewinding device, the cost of the battery core winding device can be reduced while the efficiency of winding the battery core by the battery core winding device can be improved.

[0057] Compared with the prior art, the beneficial effects of the present application are as follows:

[0058] In the present application, since the sleeve is sleeved on the unwinding shaft and is located on one side of the material roll section along the axial direction of the unwinding shaft, when the unwinding shaft starts to rotate and the material roll section unwinds the material tape in the material roll downstream, the unwinding shaft only needs to drive the material roll sleeved on itself to rotate, and there is no need to drive the material roll sleeved on the sleeve to rotate together. Generally speaking, the unwinding shaft only needs to bear the weight of one material roll sleeved on the unwinding shaft, while the weight of the material roll sleeved on the sleeve is borne by the sleeve. In this way, on the one hand, the requirement for the mechanical strength of the unwinding shaft can be reduced, and thus the manufacturing cost of the unwinding shaft can be reduced. On the other hand, since the load-bearing of the unwinding shaft is small, to a certain extent, the unwinding speed of the unwinding shaft can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0060] Figure 1 is a schematic structural diagram of an unwinding mechanism provided by an embodiment of the present application;

[0061] Figure 2 is Figure 1 a schematic structural diagram of the unwinding mechanism in FIG.

[0062] Figure 3 is Figure 2 a schematic structural diagram of the unwinding mechanism in FIG.

[0063] Figure 4 is Figure 2 a partial structural diagram of the spare roll assembly in FIG.

[0064] Figure 5 is Figure 2 a partial structural diagram of the unwinding mechanism in FIG.

[0065] Figure 6 is a schematic structural diagram of a rewinding device provided by an embodiment of the present application;

[0066] Figure 7It is a schematic structural diagram of a battery cell winding device provided by an embodiment of the present application.

[0067] Description of the reference numerals:

[0068] 1 - Mounting member;

[0069] 2 - Unwinding assembly; 21 - Unwinding shaft; 211 - Connection section; 212 - Material roll section; 22 - Support base; 23 - Third driving member; 24 - Fourth driving member;

[0070] 3 - Spare roll assembly; 30 - Loading assembly; 31 - Driving assembly; 311 - Fifth driving member; 312 - Sixth driving member; 32 - Pushing member; 321 - Spacer block; 322 - Guide rod; 33 - Sleeve; 330 - Rolling element group; 331 - Stop member; 332 - Rolling element; 333 - Installation groove; 34 - Clamping assembly; 341 - First driving member; 342 - First abutting member; 35 - Limiting assembly; 351 - Link; 3511 - First end; 3511a - Limiting member; 3512 - Second end; 352 - Second driving member; 353 - Hinge portion;

[0071] 100 - Unwinding mechanism; 200 - Rewinding device; 300 - Battery cell winding device; 301 - Winding needle. Detailed implementation manners

[0072] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0073] In the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0074] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific circumstances.

[0075] In addition, the terms "installed", "set up", "provided with", "connected", and "linked" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0076] In addition, terms such as "first", "second", etc. are mainly used to distinguish different devices, components, or parts (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, components, or parts. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0077] Before explaining the technical solution of this application, the background technology of this application will be described first.

[0078] The unwinding mechanism is a mechanism for unwinding a strip downstream. The unwinding mechanism usually includes an unwinding shaft, and a strip roll is sleeved on the unwinding shaft to unwind the strip downstream. In the related art, for the continuity of unwinding, a plurality of strip rolls are axially sleeved on the unwinding shaft. When one of the strip rolls is unwound, a new strip roll is pushed to continue unwinding. Since a plurality of strip rolls are sleeved on the unwinding shaft, the unwinding shaft bears a large radial force, which requires a high strength of the unwinding shaft, increases the manufacturing cost of the unwinding shaft, and the plurality of strip rolls also affect the unwinding speed of the unwinding shaft. Based on this, this application provides a new unwinding mechanism to solve the above problems.

[0079] The technical solution of this application will be further described below in conjunction with specific embodiments and the drawings.

[0080] Figure 1 is a schematic structural diagram of an unwinding mechanism 100 provided by an embodiment of this application, Figure 2 is Figure 1 a schematic structural diagram of the unwinding mechanism 100 in

[0081] See Figure 1 and Figure 2 As shown in, the unwinding mechanism 100 includes a mounting member 1, an unwinding assembly 2, and a spare roll assembly 3. Among them, the unwinding assembly 2 includes an unwinding shaft 21, and the unwinding shaft 21 is rotatably arranged and includes a strip roll section 212. The spare roll assembly 3 is arranged on the mounting member 1 and includes a loading assembly 30 and a sleeve 33. The sleeve 33 is sleeved on the unwinding shaft 21 and is axially located on one side of the strip roll section 212 along the unwinding shaft 21.

[0082] In this embodiment, when unwinding the material tape downstream through the unwinding mechanism 100, first, a material roll can be sleeved on both the unwinding shaft 21 and the sleeve 33. Then, since the unwinding shaft 21 is rotatably arranged, the unwinding shaft 21 can be made to start rotating. When the unwinding shaft 21 starts rotating, the purpose of unwinding the material tape in the material roll on the unwinding shaft 21 to the downstream can be achieved.

[0083] When the material tape in the material roll on the unwinding shaft 21 is completely unwound, since the spare roll assembly 3 is arranged on the mounting member 1, the sleeve 33 is sleeved on the unwinding shaft 21 and is located on one side of the material roll section 212 along the axial direction of the unwinding shaft 21, the loading component 30 can drive the material roll to move along the axial direction of the unwinding shaft 21. And when the loading component 30 drives the material roll to move along the axial direction of the unwinding shaft 21, the loading component 30 can push the material roll sleeved on the sleeve 33 to the material roll section 212.

[0084] There are various ways for the above loading component 30 to drive the material roll to move along the axial direction of the unwinding shaft 21. In one possible implementation, see Figure 1 and Figure 2 , in some embodiments, the loading component 30 includes a driving component 31 and a pusher 32. Among them, the pusher 32 is connected to the driving component 31, and the driving component 31 is used to drive the pusher 32 to move along the axial direction of the unwinding shaft 21 to drive the material roll to move along the axial direction of the unwinding shaft 21, so as to achieve the purpose of pushing the material roll sleeved on the sleeve 33 to the material roll section 212.

[0085] After the material roll originally sleeved on the sleeve 33 is pushed onto the material roll section 212, the material roll section 212 can continue to unwind the material tape in the material roll to the downstream.

[0086] It can be seen that when the material tape in the material roll on the unwinding shaft 21 is completely unwound, since the sleeve 33 is sleeved on the unwinding shaft 21 and is located on one side of the material roll section 212 along the axial direction of the unwinding shaft 21, by driving the driving component 31 to drive the pusher 32 to push the material roll on the sleeve 33 to the material roll section 212, the material roll section 212 can continue to unwind the material tape to the downstream.

[0087] Among them, since the sleeve 33 is sleeved on the unwinding shaft 21 and is located on one side of the coil section 212 along the axial direction of the unwinding shaft 21, when the unwinding shaft 21 starts to rotate and the coil section 212 unwinds the strip in the coil downstream, the unwinding shaft 21 only needs to drive the coil sleeved on itself to rotate, without driving the coil sleeved on the sleeve 33 to rotate together. Generally speaking, the unwinding shaft 21 only needs to bear the weight of one coil sleeved on the unwinding shaft 21, while the weight of the coil sleeved on the sleeve 33 is borne by the sleeve 33. In this way, on the one hand, the requirement for the mechanical strength of the unwinding shaft 21 can be reduced, and thus the manufacturing cost of the unwinding shaft 21 can be reduced. On the other hand, since the load-bearing of the unwinding shaft 21 is small, the unwinding speed of the unwinding shaft 21 can be increased to a certain extent.

[0088] It should be noted that there are various implementation manners of the above driving assembly 31. In one possible implementation manner, see Figure 2 and Figure 3 , Figure 3 is Figure 2 a schematic structural view of the unwinding mechanism 100 in

[0089] from the perspective of the negative Z-axis direction. The driving assembly 31 may include a fifth driving member 311 and a sixth driving member 312. Both the fifth driving member 311 and the sixth driving member 312 are arranged on the mounting member 1, and both the fifth driving member 311 and the sixth driving member 312 are connected to the pusher 32. In this way, the fifth driving member 311 and the sixth driving member 312 can synchronously drive the pusher 32 to move along the axial direction of the unwinding shaft 21.

[0090] In order to make the pusher 32 move more smoothly along the axial direction of the unwinding shaft 21, in some embodiments, the pusher 32 may be slidably arranged on the mounting member 1 along the axial direction of the unwinding shaft 21. In this way, the pusher 32 can move more smoothly along the axial direction of the unwinding shaft 21.

[0091] Specifically, a guide rod 322 extending along the axial direction of the unwinding shaft 21 may be provided on the pusher 32. The guide rod 322 is slidably inserted into the mounting member 1 along the axial direction of the unwinding shaft 21. In this way, the purpose of making the pusher 32 slidably arranged on the mounting member 1 along the axial direction of the unwinding shaft 21 can be achieved.

[0092] Among them, the number of the above guide rods 322 may be two or three, etc., and this embodiment does not limit this.

[0093] In some embodiments, see Figure 1 , the pusher 32 is sleeved on the sleeve 33.

[0094] By sleeving the pusher 32 on the sleeve 33, when the pusher 32 is used to push the coil on the sleeve 33, the pusher 32 can form a full-circle contact with one end of the coil. In this way, on the one hand, the contact area between the pusher 32 and the coil can be made larger, thereby avoiding the situation where the coil is deformed due to excessive local stress. On the other hand, the force on the entire circumference of the coil can be made more balanced, so as to better ensure that the coil can be smoothly pushed along the axial direction of the unwinding shaft 21 to the coil section 212.

[0095] Among them, the above-mentioned pusher 32 can be a plate-like part as Figure 1 shown. Of course, the pusher 32 can also be a part of other shapes, and this embodiment does not limit this.

[0096] It should be noted that the above-mentioned sleeving of the pusher 32 on the sleeve 33 is only a possible implementation manner. In another possible implementation manner, the pusher 32 is located on at least one side of the sleeve 33 along the radial direction of the sleeve 33, that is, the pusher 32 is not sleeved on the sleeve 33. Such a setting, on the one hand, facilitates the installation of the pusher 32, and on the other hand, can also reduce the possibility of interference between the pusher 32 and the sleeve 33 to a certain extent.

[0097] It can be understood that in order to ensure that the pusher 32 can push the coil on the sleeve 33 to move relative to the sleeve 33 along the axial direction of the unwinding shaft 21, there can be a certain gap between the pusher 32 and the sleeve 33. In this way, the situation of friction between the pusher 32 and the sleeve 33 can be avoided to a certain extent.

[0098] Considering that when the pusher 32 is used to push the coil on the sleeve 33, a contact force will be generated between the pusher 32 and the coil. Over time, on the one hand, the pusher 32 may be damaged by friction due to the contact force, and on the other hand, the pusher 32 may also scratch the coil. To avoid this situation, in some embodiments, see Figure 1 and Figure 2 , a cushion block 321 is provided on the side of the pusher 32 facing the coil section 212.

[0099] By providing the cushion block 321 on the side of the pusher 32 facing the coil section 212, in this way, when the pusher 32 is used to push the coil, the coil will contact the cushion block 321 instead of directly contacting the pusher 32. In this way, on the one hand, the cushion block 321 can play a role in protecting the pusher 32, thereby avoiding the occurrence of damage to the pusher 32. When the cushion block 321 is damaged, it can be directly replaced, which can reduce the maintenance cost. On the other hand, the contact between the cushion block 321 and the coil is a flexible contact, so as to avoid the occurrence of scratching the coil.

[0100] Among them, the above-mentioned spacer 321 can be a rubber pad, a silicone pad, etc., and this embodiment does not limit this. The shape of the spacer 321 can be annular and surround the sleeve 33. Of course, the spacer 321 can also be other possible shapes, and this embodiment does not limit this.

[0101] In some embodiments, referring to Figure 1 and Figure 2 , the unwinding shaft 21 further includes a connecting section 211. The connecting section 211 is connected to the coil section 212. The sleeve 33 is sleeved on the connecting section 211, and the outer diameter of the connecting section 211 is smaller than the outer diameter of the coil section 212.

[0102] By making the outer diameter of the connecting section 211 smaller than the outer diameter of the coil section 212, on the one hand, it is convenient to sleeve the sleeve 33 on the connecting section 211, and on the other hand, it can also make the entire unwinding shaft 21 relatively light.

[0103] In some embodiments, referring to Figure 1 and Figure 2 , the sleeve 33 is coaxially arranged with the coil section 212, and the diameter of the sleeve 33 is equal to the diameter of the coil section 212.

[0104] In this way, on the one hand, it can ensure that when the pusher 32 pushes the coil on the sleeve 33, the coil can smoothly transition from the sleeve 33 to the unwinding shaft 21. On the other hand, it can also ensure that after the coil is pushed onto the coil section 212 of the unwinding shaft 21, the coil can be stably sleeved on the coil section 212 of the unwinding shaft 21.

[0105] Furthermore, in order to better ensure that after the coil is pushed onto the unwinding shaft 21, the coil can be stably sleeved on the unwinding shaft 21. In some embodiments, the unwinding shaft 21 is an air shaft. In this way, the coil pushed onto the unwinding shaft 21 can be sleeved on the unwinding shaft 21 more quickly and stably.

[0106] In some embodiments, referring to Figure 2 and 4 , Figure 4 is Figure 2 a partial structural schematic diagram of the spare coil assembly 3. A stop member 331 is provided on the outer peripheral wall of the sleeve 33. The stop member 331 protrudes radially from the outer peripheral wall of the sleeve 33.

[0107] Since the stop member 331 protrudes radially from the outer peripheral wall of the sleeve 33, therefore, when sleeving the coil on the sleeve 33, as long as one end of the coil abuts against the stop member 331, it can be considered that the coil is installed in place on the sleeve 33 at this time, so as to ensure the repeated installation accuracy of the coil on the sleeve 33.

[0108] Among them, the above-mentioned material stop 331 can be a ring structure. When the material stop 331 is a ring structure, the ring structure can form contact with the entire circumference at one end of the material roll, so that the material stop 331 can play a better positioning role for the material roll, and further can better ensure the repeated installation accuracy of the material roll on the sleeve 33.

[0109] In order to make full use of the length of the sleeve 33 by the material roll, in some embodiments, the material stop 331 is arranged near the end of the sleeve 33 opposite to the unwinding shaft 21 ( Figure 2 the left end of the sleeve 33 in ), in this way, the length of the sleeve 33 can be fully utilized by the material roll, and further the material roll can be stably sleeved on the sleeve 33, avoiding the situation that the material roll shakes relative to the sleeve 33.

[0110] Furthermore, in order to better avoid the situation that the material roll shakes relative to the sleeve 33, in some embodiments, refer to Figure 3 , the spare roll assembly 3 further includes a clamping assembly 34. The clamping assembly 34 includes a first driving member 341 and a first abutting member 342. The first driving member 341 is arranged on the pusher 32, the first abutting member 342 is connected to the first driving member 341, and the first driving member 341 is used to drive the first abutting member 342 to move in a direction close to or away from the sleeve 33.

[0111] Since the first abutting member 342 is connected to the first driving member 341 and the first driving member 341 can drive the first abutting member 342 to move in a direction close to or away from the sleeve 33, when the pusher 32 pushes the material roll on the sleeve 33 to move axially along the unwinding shaft 21 relative to the sleeve 33, the first driving member 341 can drive the first abutting member 342 to move in a direction close to the sleeve 33, so that the first abutting member 342 abuts against the material roll on the sleeve 33. In this way, the first abutting member 342 is similar to a human hand to hold the material roll, thus avoiding the situation that the material roll shakes relative to the sleeve 33 during the process of moving axially along the unwinding shaft 21 relative to the sleeve 33.

[0112] Among them, the above-mentioned first driving member 341 can be a cylinder, and the first abutting member 342 can be an abutting block. Of course, the first driving member 341 and the first abutting member 342 can also be other possible structures respectively, and this embodiment does not limit this.

[0113] In addition, the direction in which the first driving member 341 drives the first abutting member 342 to move can be the same as the radial direction of the sleeve 33. When the moving direction of the first abutting member 342 is the same as the radial direction of the sleeve 33, when the first abutting member 342 moves along the radial direction of the sleeve 33 towards the sleeve 33, the first abutting member 342 can just abut against the outer peripheral wall of the material roll. In this way, it can play a better role in holding the material roll.

[0114] Further, in order to better avoid the situation where the coil shakes relative to the sleeve 33 during the process of moving axially along the unwinding shaft 21 relative to the sleeve 33, in some embodiments, the number of the clamping assemblies 34 is multiple, and the multiple clamping assemblies 34 are arranged at intervals around the outer peripheral wall of the sleeve 33.

[0115] By making the number of the clamping assemblies 34 be multiple and arranging the multiple clamping assemblies 34 at intervals around the outer peripheral wall of the sleeve 33, the multiple first abutting members 342 can support the coil from multiple angles and positions, so that the situation where the coil shakes relative to the sleeve 33 can be better avoided.

[0116] Specifically, the number of the clamping assemblies 34 can be Figure 3 two as shown. Of course, the number of the clamping assemblies 34 can also be three, four, five, etc., and the present embodiment does not limit this.

[0117] In order to make the coil move smoothly axially along the unwinding shaft 21 relative to the sleeve 33, in some embodiments, referring to Figure 4 , rolling members 332 are arranged on the outer peripheral wall of the sleeve 33.

[0118] By arranging the rolling members 332 on the outer peripheral wall of the sleeve 33, the friction between the coil and the outer peripheral wall of the sleeve 33 can be changed from static friction to rolling friction, and further the frictional force between the coil and the outer peripheral wall of the sleeve 33 can be reduced, so that the coil can move more smoothly axially along the unwinding shaft 21 relative to the sleeve 33.

[0119] It should be noted that the above-mentioned rolling members 332 can be rollers or any components that can make the coil move more smoothly axially along the unwinding shaft 21 relative to the sleeve 33, and the present embodiment does not limit this.

[0120] In some embodiments, referring to Figure 4 , the number of the rolling members 332 is multiple, and the multiple rolling members 332 are arranged at intervals along the direction parallel to the axis of the sleeve 33 to form a rolling member group 330, and multiple groups of rolling member groups 330 are arranged at intervals along the circumferential direction of the sleeve 33.

[0121] By making the multiple rolling members 332 be arranged at intervals along the direction parallel to the axis of the sleeve 33 to form a rolling member group 330, the coil can move more smoothly axially along the unwinding shaft 21 relative to the sleeve 33.

[0122] Further, by arranging multiple groups of rolling member groups 330 at intervals along the circumferential direction of the sleeve 33, the frictional force between each position on the outer peripheral wall of the sleeve 33 and the coil can be made relatively small, so that the coil can move more smoothly axially along the unwinding shaft 21 relative to the sleeve 33.

[0123] In some embodiments, referring to Figure 4 and Figure 5 , Figure 5 is Figure 2 a partial structural schematic diagram of the unwinding mechanism 100 in the middle. The backup roll assembly 3 further includes a limiting assembly 35. The limiting assembly 35 includes a connecting rod 351 and a second driving member 352. The second driving member 352 is disposed on the mounting member 1. An installation groove 333 extending along the axial direction of the sleeve 33 is provided on the outer peripheral wall of the sleeve 33. The connecting rod 351 is rotatably disposed in the installation groove 333 around a hinged portion 353 (not shown in the figure).

[0124] The connecting rod 351 includes a first end 3511 close to the coil section 212 and a second end 3512 disposed opposite to the first end 3511. The first end 3511 and the second end 3512 are located on both sides of the hinged portion 353. A limiting member 3511a is provided on the first end 3511. The second driving member 352 is connected to the second end 3512.

[0125] Since the second driving member 352 is disposed on the mounting member 1 and connected to the second end 3512, and the limiting member 3511a is provided on the first end 3511, and since the first end 3511 and the second end 3512 are located on both sides of the hinged portion 353, therefore, when the second driving member 352 drives the connecting rod 351 to rotate around the hinged portion 353 through the second end 3512, the limiting member 3511a can protrude from the outer peripheral wall of the sleeve 33 or be received in the installation groove 333.

[0126] Specifically, when the limiting member 3511a protrudes from the outer peripheral wall of the sleeve 33, the limiting member 3511a can play a role in blocking the coil sleeved on the sleeve 33 from sliding along the unwinding shaft 21 towards the coil section 212. In this way, when the strip in the coil on the coil section 212 has not been completely unwound, the limiting member 3511a can protrude from the outer peripheral wall of the sleeve 33, so as to avoid the abnormal sliding of the coil on the sleeve 33 to the coil section 212 under the action of vibration or the like, which affects the normal unwinding of the coil section 212, and further makes the operation of the unwinding mechanism 100 more reliable.

[0127] When the strip in the coil on the coil section 212 has been completely unwound, the second driving member 352 can drive the connecting rod 351 to rotate around the hinged portion 353 through the second end 3512, so that the limiting member 3511a is received in the installation groove 333. In this way, the blocking effect of the limiting member 3511a on the coil will disappear, which is beneficial to the pusher 32 to push the coil sleeved on the sleeve 33 to the coil section 212.

[0128] Wherein, the above-mentioned second driving member 352 can be a cylinder or an electric cylinder, etc., and this embodiment does not make a limitation thereto. The above-mentioned limiting member 3511a can be a limiting protrusion.

[0129] In some embodiments, referring to Figure 1 , the unwinding assembly 2 further includes a support base 22, a third driving member 23, and a fourth driving member 24. Among them, the support base 22 is slidably disposed on the mounting member 1 along the axial direction parallel to the unwinding shaft 21, the unwinding shaft 21 is rotatably disposed on the support base 22, the third driving member 23 is disposed on the support base 22 and connected to the unwinding shaft 21 for driving the unwinding shaft 21 to rotate, and the fourth driving member 24 is disposed on the mounting member 1 and connected to the support base 22 for driving the support base 22 to slide along the axial direction parallel to the unwinding shaft 21.

[0130] Since the unwinding shaft 21 is rotatably disposed on the support base 22 and the third driving member 23 is disposed on the support base 22 and connected to the unwinding shaft 21, the third driving member 23 can drive the unwinding shaft 21 to rotate. When the unwinding shaft 21 rotates, the purpose of unwinding the tape downstream can be achieved.

[0131] Since the support base 22 is slidably disposed on the mounting member 1 along the axial direction parallel to the unwinding shaft 21 and the fourth driving member 24 is disposed on the mounting member 1 and connected to the support base 22, the fourth driving member 24 can drive the support base 22 to slide along the axial direction parallel to the unwinding shaft 21, thereby driving the unwinding shaft 21 to slide along its own axial direction. When the unwinding shaft 21 slides along its own axial direction, it can play a role in correcting the position of the tape in the width direction of the tape.

[0132] Among them, the third driving member 23 can be a motor or any other possible mechanism, as long as it can drive the unwinding shaft 21 to rotate, and this embodiment does not limit this. The above-mentioned fourth driving member 24 can be a cylinder or an electric cylinder, etc., and this embodiment does not limit this.

[0133] The above-mentioned support base 22 can be slidably disposed on the mounting member 1 along the axial direction parallel to the unwinding shaft 21 through a slide rail assembly. Of course, the support base 22 can also be slidably disposed on the mounting member 1 along the axial direction parallel to the unwinding shaft 21 in other ways, and this embodiment does not limit this.

[0134] In some embodiments, referring to Figure 1 , the sleeve 33 is fixed to the mounting member 1, and the support base 22 and the sleeve 33 are located on both sides of the mounting member 1 along the axial direction of the unwinding shaft 21.

[0135] By making the support base 22 and the sleeve 33 located on both sides of the mounting member 1 along the axial direction of the unwinding shaft 21, the support base 22 and the sleeve 33 can respectively make full use of the space on both sides of the mounting member 1, making the structural layout of the entire unwinding mechanism 100 more compact.

[0136] Figure 6It is a schematic structural diagram of a roll-changing device 200 provided by an embodiment of the present application. Refer to Figure 6 , the roll-changing device 200 includes a plurality of unwinding mechanisms 100.

[0137] Among them, the structure of the unwinding mechanism 100 can be the same as that of any of the unwinding mechanisms 100 described in the above embodiments, and can bring the same or similar beneficial effects. For details, please refer to the description in the above embodiments, and this embodiment will not be elaborated here.

[0138] In this embodiment, since the unwinding shaft 21 of the unwinding mechanism 100 has a low manufacturing cost and a high unwinding speed, when the roll-changing device 200 includes this unwinding mechanism 100, the cost of the entire roll-changing device 200 can be reduced to a certain extent, and the unwinding efficiency of the entire roll-changing device 200 can be improved.

[0139] Among them, the number of the unwinding mechanisms 100 can be multiple. For example, it can be two as shown in Figure 6 . Of course, the number of the unwinding mechanisms 100 can also be three or four, etc. This embodiment does not limit this.

[0140] When the number of the unwinding mechanisms 100 is multiple, the multiple unwinding mechanisms 100 can unwind alternately. Therefore, the continuity of unwinding is better.

[0141] Figure 7 It is a schematic structural diagram of a battery cell winding device 300 provided by an embodiment of the present application. Refer to Figure 7 , the battery cell winding device 300 includes a roll-changing device 200.

[0142] Among them, the structure of the roll-changing device 200 can be the same as that of any of the roll-changing devices 200 described in the above embodiments, and can bring the same or similar beneficial effects. For details, please refer to the description in the above embodiments, and this embodiment will not be elaborated here.

[0143] Since the cost of the roll-changing device 200 is low and the unwinding efficiency is high, when the battery cell winding device 300 includes this roll-changing device 200, the cost of the battery cell winding device 300 can be reduced while the efficiency of winding the battery cells of the battery cell winding device 300 can be improved.

[0144] In some embodiments, the battery cell winding device 300 further includes a winding needle 301. When the winding needle 301 rotates, the tape unwound from the unwinding shaft 21 can be wound around itself to form a battery cell.

[0145] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A reeling mechanism (100), characterized in that: include: An unwinding assembly (2), the unwinding assembly (2) comprising an unwinding shaft (21), the unwinding shaft (21) being rotatably arranged, and the unwinding shaft (21) comprising a material roll section (212); as well as, A roll preparation assembly (3), the roll preparation assembly (3) comprising a loading assembly (30) and a sleeve (33), the sleeve (33) being sleeved on the unwinding shaft (21) and being located on one side of the roll section (212) along the axial direction of the unwinding shaft (21).

2. The unwinding mechanism (100) according to claim 1, characterized in that: The sleeve (33) is used to carry the material roll, and the loading assembly (30) is used to drive the material roll to move axially along the unwinding shaft (21).

3. The unwinding mechanism (100) according to claim 2, characterized in that: The feeding assembly (30) comprises: a drive assembly (31); and, A material pushing member (32), wherein the material pushing member (32) is connected to the driving assembly (31), and the driving assembly (31) is used to drive the material pushing member (32) to move axially along the unwinding shaft (21).

4. The unwinding mechanism (100) according to claim 3, characterized in that: A cushion block (321) is provided on one side of the material pushing member (32) facing the material coil section (212).

5. The unwinding mechanism (100) according to claim 3, characterized in that: The material pushing member (32) is sleeved on the sleeve (33).

6. The unwinding mechanism (100) according to claim 3, characterized in that: The pusher (32) is located on at least one side of the sleeve (33) along the radial direction of the sleeve (33).

7. The unwinding mechanism (100) according to claim 3, characterized in that: The roll preparation component (3) further comprises: A clamping assembly (34), the clamping assembly (34) comprising a first driving member (341) and a first abutting member (342), the first driving member (341) being arranged on the pushing member (32), the first abutting member (342) being connected to the first driving member (341), the first driving member (341) being used for driving the first abutting member (342) to move towards or away from the sleeve (33).

8. The unwinding mechanism (100) according to claim 7, characterized in that: There are multiple clamping assemblies (34), and the multiple clamping assemblies (34) are arranged at intervals around the outer peripheral wall of the sleeve (33).

9. The unwinding mechanism (100) according to claim 3, characterized in that: The unwinding mechanism (100) further comprises a mounting member (1), and the pushing member (32) is slidably arranged on the mounting member (1) along the axial direction of the unwinding shaft (21).

10. The unwinding mechanism (100) according to claim 1, characterized in that: The unwinding shaft (21) further comprises: A connecting section (211), the connecting section (211) is connected to the material coil section (212), the sleeve (33) is sleeved on the connecting section (211), and the outer diameter of the connecting section (211) is smaller than the outer diameter of the material coil section (212).

11. The unwinding mechanism (100) according to claim 10, characterized in that: The sleeve (33) is coaxially arranged with the material coil section (212), and the outer diameter of the sleeve (33) is equal to the outer diameter of the material coil section (212).

12. The unwinding mechanism (100) according to claim 1, characterized in that: A material stopper (331) is provided on the outer peripheral wall of the sleeve (33), and the material stopper (331) protrudes from the outer peripheral wall of the sleeve (33) along the radial direction of the sleeve (33).

13. The unwinding mechanism (100) according to claim 1, characterized in that: A rolling element (332) is provided on the outer peripheral wall of the sleeve (33).

14. The unwinding mechanism (100) according to claim 13, characterized in that: There are a plurality of rolling elements (332), and the plurality of rolling elements (332) are spaced apart along an axial direction parallel to the sleeve (33) to form a rolling element group (330).

15. The unwinding mechanism (100) according to claim 14, characterized in that: A plurality of rolling element groups (330) are arranged at intervals along the circumference of the sleeve (33).

16. The unwinding mechanism (100) according to claim 1, characterized in that: The roll preparation component (3) further comprises: A limit assembly (35), the limit assembly (35) comprising a connecting rod (351) and a second driving member (352), a mounting groove (333) extending along the axial direction of the sleeve (33) being provided on the outer peripheral wall of the sleeve (33), and the connecting rod (351) being rotatably arranged in the mounting groove (333) around a hinge portion (353); The connecting rod (351) includes a first end (3511) and a second end (3512), wherein the first end (3511) and the second end (3512) are located on both sides of the hinged portion (353), and the first end (3511) is close to the material roll section (212), a limiting member (3511a) is provided on the first end (3511), and the second driving member (352) is connected to the second end (3512).

17. The unwinding mechanism (100) according to claim 16, characterized in that: The second driving member (352) is used to drive the connecting rod (351) to rotate around the hinge portion (353) through the second end (3512), so that the limiting member (3511a) protrudes from the outer peripheral wall of the sleeve (33) or is accommodated in the installation groove (333).

18. The unwinding mechanism (100) according to claim 1, characterized in that: The unwinding mechanism (100) further comprises a mounting member (1), and the unwinding assembly (2) further comprises: A support seat (22), the support seat (22) being slidably disposed on the mounting member (1) along an axial direction parallel to the unwinding shaft (21), and the unwinding shaft (21) being rotatably disposed on the support seat (22); a third driving member (23), the third driving member (23) being disposed on the support seat (22) and connected to the unwinding shaft (21), and being used for driving the unwinding shaft (21) to rotate; and A fourth driving member (24), the fourth driving member (24) is arranged on the mounting member (1) and connected to the support seat (22), and is used for driving the support seat (22) to slide along an axial direction parallel to the unwinding shaft (21).

19. The unwinding mechanism (100) according to claim 18, characterized in that: The sleeve (33) is fixed to the mounting member (1), and the support seat (22) and the sleeve (33) are located on both sides of the mounting member (1) along the axial direction of the unwinding shaft (21).

20. A roll changing device (200), characterized in that: include: The unwinding mechanism (100) according to any one of claims 1 to 19.

21. The roll changing device (200) according to claim 20, characterized in that: The number of the unwinding mechanisms (100) is plural.

22. A battery cell winding device (300), characterized in that: It comprises the roll changing device (200) as claimed in claim 20 or 21.

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