Electrode sheet feeding apparatus and battery cell winding device

Abstract

An electrode sheet feeding apparatus and a battery cell winding device, said apparatus comprising: a deviation correction assembly (1), the deviation correction assembly (1) comprising a deviation correction roller (11); and a material supporting assembly (2), the material supporting assembly (2) comprising a support plate (21), the support plate (21) being provided with at least two limiting portions (2112) and a clearance portion (2111) located between the at least two limiting portions (2112), and the limiting portions (2112) being used for supporting an electrode sheet (3), wherein in the conveying direction of the electrode sheet (3), at least a portion of the support plate (21) can move from upstream of the deviation correction roller (11) to downstream of the deviation correction roller (11), and the clearance portion (2111) is configured to allow the deviation correction roller (11) to clamp the electrode sheet (3).

Description

Pole piece winding-in device and battery cell winding equipment

[0001] The present disclosure claims priority to the Chinese patent application No. 202421997152.9, filed on August 16, 2024, and entitled "Pole piece winding-in device and battery cell winding equipment", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to a pole piece winding-in device and a battery cell winding equipment. BACKGROUND

[0003] In the process of battery production, the pole piece winding-in device is used to deliver the head of the pole piece to the winding needle for winding to form a battery cell. However, the related art supporting plate for carrying the pole piece cannot pass the deviation correcting roller, so that the pole piece between the deviation correcting roller and the winding needle is in a suspended state, and thus the pole piece in the suspended state is prone to damage by colliding with other mechanisms when feeding.

[0004] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. SUMMARY

[0005] An object of the present disclosure is to provide a new technical solution for a pole piece winding-in device and a battery cell winding equipment.

[0006] To achieve the above object, according to a first aspect of the present disclosure, a pole piece winding-in device is provided, comprising:

[0007] a deviation correcting assembly, the deviation correcting assembly comprising a deviation correcting roller;

[0008] a material supporting assembly, the material supporting assembly comprising a supporting plate, the supporting plate being provided with at least two limiting portions and a avoiding portion between the at least two limiting portions, the limiting portions being used for carrying the pole piece;

[0009] In the conveying direction of the pole piece, at least a part of the supporting plate is capable of moving from the upstream of the deviation correcting roller to the downstream of the deviation correcting roller, and the avoiding portion is used for the deviation correcting roller to clamp the pole piece.

[0010] Optionally, the avoiding portion has an opening, and in the state that the supporting plate is upstream of the deviation correcting roller, the opening faces the deviation correcting roller.

[0011] Optionally, in the conveying direction of the pole piece, a feeding assembly is provided upstream of the material supporting assembly, and the feeding assembly is used for conveying the pole piece to the deviation correcting roller.

[0012] Optionally, a first driving member is further included, and the first driving member is used for driving the feeding assembly and the material supporting assembly to approach or move away from the deviation correcting assembly.

[0013] Optionally, the material supporting assembly further comprises a support and a second driving member, the supporting plate is mounted on the support, and the second driving member is configured to drive the support to move towards or away from the feeding assembly.

[0014] Optionally, the material supporting assembly further comprises a cutting assembly and a second driving member, the second driving member is configured to drive the supporting plate to move towards the upstream cutting end of the pole piece after the cutting assembly cuts the pole piece.

[0015] Optionally, the supporting plate comprises a first supporting plate and a second supporting plate.

[0016] The material supporting assembly further comprises a third driving member, the third driving member is configured to drive the second supporting plate to move towards or away from the first supporting plate.

[0017] Optionally, the deviation rectifying roller comprises a first deviation rectifying roller and a second deviation rectifying roller.

[0018] The deviation rectifying assembly further comprises a fourth driving member, the fourth driving member is configured to drive the first deviation rectifying roller to move towards or away from the second deviation rectifying roller.

[0019] According to a second aspect of the present disclosure, there is also provided an electrode piece winding device, comprising the electrode piece winding-in device as in any one of the preceding aspects.

[0020] Optionally, a winding needle is arranged downstream of the deviation rectifying assembly in the conveying direction of the electrode piece, and the deviation rectifying assembly is configured to convey the head of the electrode piece to the winding needle so that the winding needle winds the electrode piece and the separator.

[0021] In the electrode piece winding-in device in the embodiments of the present disclosure, the supporting plate can move towards the deviation rectifying roller, at least a part of the supporting plate passes through the deviation rectifying roller from the upstream of the deviation rectifying roller to the downstream of the deviation rectifying roller, thus the position of the limiting part of the supporting plate carrying the head of the electrode piece is closer to the winding needle, and when the electrode piece is fed, the damage of the electrode piece caused by the free swing and the impact on other mechanisms can be effectively avoided.

[0022] Other features of the present disclosure and its advantages will become apparent from the following detailed description of exemplary embodiments with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0024] FIG. 1 is a structural schematic view of a deviation rectifying roller and a supporting plate in an embodiment of the present disclosure.

[0025] FIG. 2 is a structural schematic view of a supporting plate in an embodiment of the present disclosure.

[0026] FIG. 3 is a structural schematic view of a feeding assembly and a material supporting assembly in an embodiment of the present disclosure.

[0027] Fig. 4 is a first state diagram of a pole piece in-feed device in one embodiment of the present disclosure.

[0028] Fig. 5 is a second state diagram of a pole piece in-feed device in one embodiment of the present disclosure.

[0029] Fig. 6 is a third state diagram of a pole piece in-feed device in one embodiment of the present disclosure.

[0030] Fig. 7 is a fourth state diagram of a pole piece in-feed device in one embodiment of the present disclosure.

[0031] Fig. 8 is a fifth state diagram of a pole piece in-feed device in one embodiment of the present disclosure.

[0032] Fig. 9 is a first state diagram of a pole piece in-feed device in another embodiment of the present disclosure.

[0033] Fig. 10 is a second state diagram of a pole piece in-feed device in another embodiment of the present disclosure.

[0034] Fig. 11 is a third state diagram of a pole piece in-feed device in another embodiment of the present disclosure.

[0035] Fig. 12 is a fourth state diagram of a pole piece in-feed device in another embodiment of the present disclosure.

[0036] Fig. 13 is a fifth state diagram of a pole piece in-feed device in another embodiment of the present disclosure.

[0037] BRIEF DESCRIPTION OF THE DRAWINGS 1, deviation rectifying assembly; 11, deviation rectifying roller; 111, first deviation rectifying roller; 112, second deviation rectifying roller; 2, material supporting assembly; 21, supporting plate; 211, second supporting plate; 2111, avoiding part; 21111, opening; 2112, limiting part; 21121, end part; 212, first supporting plate; 22, supporting base; 221, fixed supporting base; 222, movable supporting base; 23, second driving member; 24, third driving member; 25, linear rail sliding block mechanism; 3, pole piece; 4, feeding assembly; 41, feeding roller; 5, cutter assembly; 6, feeding roller driving member; 7, winding needle; 8, diaphragm; 9, first driving member; 10, main body member; A, upstream cutting end; B, downstream cutting end. DETAILED DESCRIPTION

[0038] Various exemplary embodiments of the present disclosure will now be described in detail by referring to the drawings. It should be noted that the relative arrangement, numerical expressions, and values of the components and steps set forth in these embodiments are not limiting to the scope of the present disclosure unless specifically stated otherwise.

[0039] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way limiting to the scope of the present disclosure and its applications or uses.

[0040] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and devices can be considered part of the present disclosure.

[0041] In all of the compositions shown and discussed herein, any specific numerical values should be interpreted as merely exemplary, and not a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0042] It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, it need not be discussed further in subsequent figures.

[0043] In the following description, "connection" includes both direct connection and indirect connection through an intervening device, such as a relay, an intermediate device, or the like, between two elements.

[0044] In the following description, "pole piece" and "diaphragm" are used only to illustrate the working principle of the pole piece winding device, and should not be considered as part of the pole piece winding device.

[0045] In the following description, each driving member can be driven by various power sources, such as a cylinder, a motor, or the like.

[0046] As shown in FIGS. 1-13, the pole piece winding device in the embodiments of the present disclosure includes a deviation rectifying assembly 1, which includes a deviation rectifying roller 11; a material supporting assembly 2, which includes a supporting plate 21 provided with at least two limiting portions 2112 for bearing a pole piece 3 and a clearance portion 2111 between the at least two limiting portions 2112, the at least one portion of the supporting plate 21 being movable from upstream of the deviation rectifying roller 11 to downstream of the deviation rectifying roller 11 in a conveying direction of the pole piece 3, and the clearance portion 2111 being for clamping the pole piece 3 by the deviation rectifying roller 11.

[0047] Specifically, the pole piece winding device provided by the embodiment of the present disclosure comprises a main body 10, which can be a plate-shaped member or other suitable structure, and mainly serves to bear various driving members, a deviation rectifying assembly 1 and a material supporting assembly 2. In the embodiment shown below, the deviation rectifying assembly 1 comprises deviation rectifying rollers 11, which are used to rectify the pole piece 3 to avoid the pole piece 3 from being deflected and affecting the winding effect of the battery cell. The deviation rectifying rollers 11 can be provided with two. The material supporting assembly 2 comprises a supporting plate 21, which can be provided with one or more to bear the pole piece 3. The supporting plate 21 is provided with limiting portions 2112 and avoiding portions 2111. The limiting portions 2112 are arranged along the width direction of the supporting plate 21 (also the width direction of the pole piece 3 on the supporting plate 21) to bear the pole piece 3 on the supporting plate 21 and prevent the pole piece 3 from swinging. The avoiding portions 2111 are arranged between the two limiting portions 2112 to allow the deviation rectifying rollers 11 to clamp the pole piece 3.

[0048] In operation, the supporting plate 21 moves towards the deviation rectifying rollers 11, and at least a part of the supporting plate 21 gradually moves from a position away from the deviation rectifying rollers 11 upstream of the deviation rectifying rollers 11 to the deviation rectifying rollers 11 in the conveying direction of the pole piece 3 and can pass over the deviation rectifying rollers 11 to the downstream of the deviation rectifying rollers 11. Since the pole piece 3 is borne by the limiting portions 2112 and a part of the pole piece 3 is located at the avoiding portions 2111 between the two limiting portions 2112, at least a part of the two deviation rectifying rollers 11 can clamp the pole piece 3 at the avoiding portions 2111. Compared with the related art, the supporting plate 21 for bearing the pole piece 3 cannot pass over the deviation rectifying rollers 11, so that the pole piece 3 between the deviation rectifying rollers 11 and the material feeding position of the pole piece 3 is in a suspended state. The present disclosure sets the avoiding portions 2111, so that at least a part of the deviation rectifying rollers 11 can clamp the pole piece 3 at the avoiding portions 2111 in the winding process of the pole piece 3, so that the head of the pole piece 3 is closer to the material feeding position of the pole piece 3, thereby greatly shortening the size of the pole piece 3 in the suspended state and effectively solving the problem that the pole piece 3 in the suspended state is easily damaged by colliding with other mechanisms, and significantly improving the winding reliability of the pole piece 3.

[0049] In addition, the limiting portions 2112 of the embodiment of the present disclosure can also be provided in plurality, and the plurality of limiting portions 2112 are arranged at intervals along the width direction of the supporting plate 21, so that a plurality of avoiding portions 2111 can also be formed. Those skilled in the art can select according to actual needs, which is not specifically limited herein.

[0050] In addition, it should be noted that the head of the pole piece 3 refers to the end of the pole piece 3 close to the feeding position of the pole piece 3. In addition, after the cutting knife assembly 5 cuts the pole piece 3, the cutting position of the pole piece 3 is divided into the upstream cutting end A of the pole piece 3 and the downstream cutting end B of the pole piece 3, at this time, the head of the pole piece 3 also refers to the upstream cutting end A of the pole piece 3.

[0051] In one embodiment, the avoiding part 2111 has an opening 21111, and in the state that the supporting plate 21 is upstream of the deviation correcting roller 11, the opening 21111 faces the deviation correcting roller 11.

[0052] Specifically, as shown in FIGS. 1 and 2, the avoiding part 2111 of the embodiment of the present disclosure has an opening 21111, which is used to avoid the deviation correcting roller 11 when the supporting plate 21 moves in the conveying direction of the pole piece 3, so that the end 21121 of the limiting part 2112 of the supporting plate 21 can directly reach from the upstream of the deviation correcting roller 11 to the downstream of the deviation correcting roller 11 without interfering with the deviation correcting roller 11.

[0053] For example, as shown in FIGS. 6 and 7 or FIGS. 11 and 12, when the avoiding part 2111 of the present disclosure is provided with the opening 21111, in the conveying direction of the pole piece 3, the supporting plate 21 can move towards the deviation correcting roller 11 so that the end 21121 of the limiting part 2112 reaches from the upstream of the deviation correcting roller 11 to the downstream of the deviation correcting roller 11, effectively simplifying the overall mechanism of the pole piece winding device and significantly reducing the manufacturing cost of the pole piece winding device.

[0054] In addition, in other embodiments of the present disclosure, the avoiding part 2111 can also not be provided with the opening 21111, at this time, the avoiding part 2111 is a closed hole. When the supporting plate 21 moves towards the deviation correcting roller 11, the first deviation correcting roller 111 needs to be driven away from the second deviation correcting roller 112 by the fourth driving member first, and then after the end of the limiting part 2112 of the supporting plate 21 passes the deviation correcting roller 11, the first deviation correcting roller 111 is driven to approach the second deviation correcting roller 112 by the fourth driving member to realize that at least part of the deviation correcting roller 11 clamps the pole piece 3.

[0055] It should be noted that in the state that the supporting plate 21 is upstream of the deviation correcting roller 11, the end 21121 of the limiting part 2112 refers to the end of the limiting part 2112 close to the deviation correcting roller 11, and also refers to the end of the limiting part 2112 close to the upstream cutting end A of the pole piece 3.

[0056] In one embodiment, upstream of the supporting plate assembly 2 in the conveying direction of the pole piece 3 is provided with a feeding assembly 4, which is used to convey the pole piece 3 to the deviation correcting roller 11.

[0057] Specifically, as shown in FIGS. 3-12, the feeding assembly 4 is arranged on the main body 10, and the feeding assembly 4 includes two feeding rollers 41 and a feeding roller driving member 6 for driving the two feeding rollers 41 to clamp the pole piece 3. The feeding roller driving member 6 can be a rotary motor, a cylinder multi-link mechanism, etc., so that the two feeding rollers 41 can clamp the pole piece 3 and then convey the pole piece 3 towards the deviation rectifying assembly 1, and then the pole piece 3 can be wound into a battery cell.

[0058] In addition, in other embodiments of the present disclosure, the feeding assembly 4 can not include the feeding rollers 41, but can use a clamping plate or the like to convey the pole piece 3 towards the deviation rectifying assembly 1.

[0059] In one embodiment of the present disclosure, the material supporting assembly 2 is arranged on the feeding assembly 4, so that the feeding assembly 4 and the material supporting assembly 2 can move simultaneously to drive the pole piece 3 to approach the deviation rectifying roller 11, and then move away from the deviation rectifying roller 11 to the initial position after the pole piece 3 is wound by the winding needle.

[0060] In one embodiment, the pole piece winding device further includes a first driving member 9 for driving the feeding assembly 4 and the material supporting assembly 2 to approach or move away from the deviation rectifying assembly 1.

[0061] Specifically, in the embodiment of the present disclosure, the first driving member 9 can be a rotary motor, a cylinder multi-link mechanism, etc., for driving the feeding assembly 4 and the material supporting assembly 2 to approach or move away from the deviation rectifying assembly 1.

[0062] Therefore, during the conveying of the pole piece 3 by the feeding assembly 4 towards the deviation rectifying roller 11, the material supporting assembly 2 supports the pole piece 3 and gradually approaches and passes the deviation rectifying roller 11, which can effectively ensure the stability and reliability of the pole piece 3 during the conveying. After the pole piece 3 is wound, the first driving member 9 drives the feeding assembly 4 and the material supporting assembly 2 to move away from the deviation rectifying assembly 1 to the initial position.

[0063] In one embodiment, the material supporting assembly 2 further includes a support 22 and a second driving member 23, the supporting plate 21 is arranged on the support 22, and the second driving member 23 is used to drive the support 22 to approach or move away from the feeding assembly 4.

[0064] Specifically, as shown in FIG. 3, the second driving member 23 is arranged on the feeding assembly 4, and the second driving member 23 can be a rotary motor, a cylinder multi-link mechanism, etc., for driving the support 22 to approach or move away from the feeding assembly 4.

[0065] Therefore, as shown in FIGS. 8-11, in operation, the present application can drive the support 22 away from the feeding assembly 4 by the second driving member 23, so that the support plate 21 on the support 22 can be closer to the head of the pole piece 3, thereby effectively avoiding the situation that the pole piece 3 is bent to cause poor quality of the battery cell, and further improving the control effect of the pole piece winding device on the head of the pole piece 3.

[0066] In one embodiment, the pole piece winding device further comprises a cutter assembly 5 and a second driving member 23, which can drive the support plate 21 to move towards the upstream cut end of the pole piece 3 after the pole piece 3 is cut by the cutter assembly 5.

[0067] Specifically, the cutter assembly 5 comprises a pole piece cutter and a cutter driving member for driving the pole piece cutter to move, which can adopt a rotary motor, a cylinder multi-link mechanism, etc. to drive the pole piece cutter to cut the pole piece 3.

[0068] Further, as shown in FIGS. 10 and 11, after the pole piece 3 is cut by the cutter assembly 5, the cut position of the pole piece 3 is divided into the upstream cut end A of the pole piece 3 and the downstream cut end B of the pole piece 3, i.e. the pole piece 3 is divided into a winding pole piece and a to-be-wound pole piece, the upstream cut end A of the pole piece 3 is located in the to-be-wound pole piece, and the downstream cut end B of the pole piece 3 is located in the to-be-wound pole piece. At this time, the winding pole piece is wound by the winding needle 7 to form a battery cell, and the to-be-wound pole piece is clamped by the feeding roller 41 of the feeding assembly 4. The pole piece winding device can drive the support plate 21 to move towards the upstream cut end A of the pole piece 3 by the second driving member 23, so that the end 21121 of the limiting portion 2112 is closer to the upstream cut end A of the pole piece 3, thereby effectively realizing that the support plate 21 is close to the head of the pole piece 3 and carries the head of the pole piece 3, the size of the head of the pole piece 3 which can freely move is shorter, and the control effect of the pole piece winding device on the head of the pole piece 3 is further improved. After the pole piece 3 is wound, the second driving member 23 drives the support plate 21 to be close to the feeding assembly 4, and the first driving member 9 drives the feeding assembly 4 and the support assembly 2 to return to the initial position.

[0069] In one embodiment, the support plate 21 comprises a first support plate 212 and a second support plate 211; and the support assembly 2 further comprises a third driving member 24 for driving the second support plate 211 to be close to or away from the first support plate 212.

[0070] Specifically, as shown in FIG. 3, in the embodiment shown below, the support 22 is provided with a fixed support 221 and a movable support 222, the fixed support 221 is fixedly connected with the support 22, and the movable support 222 is connected with the support 22 through a linear rail sliding block mechanism 25.

[0071] The second support plate 211 is arranged on the fixed support 221, and the first support plate 212 is arranged on the movable support 222. The third driving member 24 is arranged on the support 22 and can drive the movable support 222 to slide along the linear rail sliding block mechanism 25.

[0072] Therefore, since the first support plate 212 is arranged on the movable support 222, the third driving member 24 can drive the first support plate 212 to move close to the second support plate 211 to clamp the pole piece 3 or to move away from the second support plate 211 to release the pole piece 3 by using a rotary motor, a cylinder multi-link mechanism, etc., thereby effectively improving the stability and reliability of the pole piece 3 during the conveying process.

[0073] In other embodiments of the present disclosure, the third driving member 24 can simultaneously drive the first support plate 212 and the second support plate 211 to move, so that they move close to or away from each other. That is, the third driving member 24 for driving the second support plate 211 to move close to or away from the first support plate 212 includes the case where the third driving member 24 only drives one support plate 21 and the case where the third driving member 24 simultaneously drives two support plates 21.

[0074] In one embodiment, the deviation rectifying roller 11 includes a first deviation rectifying roller 111 and a second deviation rectifying roller 112, and the deviation rectifying assembly 1 further includes a fourth driving member for driving the first deviation rectifying roller 111 to move close to or away from the second deviation rectifying roller 112.

[0075] Specifically, in the embodiments of the present disclosure, the fourth driving member can drive the first deviation rectifying roller 111 to move close to or away from the second deviation rectifying roller 112 by using a rotary motor, a cylinder multi-link mechanism, etc.

[0076] Therefore, when the supporting plate 21 moves towards the deviation correcting roller 11, the first deviation correcting roller 111 can be first driven by the fourth driving member to move away from the second deviation correcting roller 112, so that the supporting plate 21 can pass over the first deviation correcting roller 111 and the second deviation correcting roller 112, and then the first deviation correcting roller 111 is driven by the fourth driving member to move close to the second deviation correcting roller 112, so that at least a part of the first deviation correcting roller 111 and the second deviation correcting roller 112 can be located in the avoiding part 2111 of the supporting plate 21 to clamp the pole piece 3 located at the avoiding part 2111 between the two limiting parts 2112, so as to effectively avoid the supporting plate 21 from colliding with the deviation correcting roller 11 to be damaged when passing over the deviation correcting roller 11, and the clamping reliability of the first deviation correcting roller 111 and the second deviation correcting roller 112 on the pole piece 3 is significantly ensured. Similarly, the fourth driving member can drive the first deviation correcting roller 111 to move close to or away from the second deviation correcting roller 112, which includes the case of driving only one deviation correcting roller to move, and also includes the case of driving both deviation correcting rollers to move at the same time.

[0077] In one embodiment, as shown in FIG. 4, when the pole piece winding device is in the first state, the first driving member 9 does not act, the feeding assembly 4 and the material supporting assembly 2 remain in the initial position away from the deviation correcting assembly 1, and the winding needle 7 normally winds the pole piece 3 and the diaphragm 8 to form a battery cell.

[0078] After the winding of the battery cell is completed, the pole piece winding device is in the second state, as shown in FIG. 5, the feeding roller driving member 6 drives the feeding roller 41 of the feeding assembly 4 to clamp the pole piece 3, and the cutter driving member of the cutter assembly 5 drives the pole piece cutter to cut the pole piece 3.

[0079] After the pole piece 3 is cut, the pole piece winding device is in the third state, as shown in FIG. 6, the first driving member 9 drives the feeding assembly 4 and the material supporting assembly 2 to continue to move close to the deviation correcting assembly 1 and pass over the cutter assembly 5.

[0080] After the feeding assembly 4 and the material supporting assembly 2 pass over the cutter assembly 5, at least a part of the supporting plate 21 passes over the deviation correcting roller 11 from the upstream of the deviation correcting roller 11 to the downstream of the deviation correcting roller 11 in the conveying direction of the pole piece 3, at this time, the pole piece winding device is in the fourth state, as shown in FIG. 7, since a part of the pole piece 3 is carried by the limiting part 2112 and another part is located at the avoiding part 2111 between the two limiting parts 2112, at least a part of the two deviation correcting rollers 11 can clamp the pole piece 3 at the avoiding part 2111.

[0081] When the pole piece winding device is in the fifth state, as shown in Fig. 8, the material supporting assembly 2 passes the deviation correcting assembly 1 to make the head of the pole piece 3 close to the winding needle 7 to deliver the head of the pole piece 3 to the winding needle 7, the feeding roller driving member 6 drives the two feeding rollers 41 to move away to loosen the pole piece 3, the third driving member 24 drives the first supporting plate 212 to move away from the second supporting plate 211 to loosen the pole piece 3, and the first driving member 9 drives the feeding assembly 4 and the material supporting assembly 2 to move away from the deviation correcting assembly 1 to return to the initial position.

[0082] When the feeding assembly 4 and the material supporting assembly 2 return to the initial position, the pole piece winding device is in the first state, as shown in Fig. 4, the winding needle 7 normally winds the pole piece 3 and the diaphragm 8 to form a battery cell.

[0083] In addition, in an embodiment, as shown in Fig. 9, when the pole piece winding device is in the first state, the first driving member 9 does not act, the feeding assembly 4 and the material supporting assembly 2 remain in the initial position away from the deviation correcting assembly 1, and the winding needle 7 normally winds the pole piece 3 and the diaphragm 8 to form a battery cell.

[0084] When the winding of the battery cell is completed, the pole piece winding device is in the second state, as shown in Fig. 10, the feeding roller driving member 6 drives the feeding roller 41 of the feeding assembly 4 to clamp the pole piece 3, and the cutter driving member of the cutter assembly 5 drives the pole piece cutter to cut the pole piece 3.

[0085] After the pole piece 3 is cut, the pole piece winding device is in the third state, as shown in Fig. 11, the second driving member 23 drives the supporting plate 21 to move toward the upstream cut end A of the pole piece 3 to make the end 21121 of the limiting part 2112 closer to the upstream cut end A of the pole piece 3, and the first driving member 9 drives the feeding assembly 4 and the material supporting assembly 2 to continue to approach the deviation correcting assembly 1 and pass the cutter assembly 5.

[0086] After the feeding assembly 4 and the material supporting assembly 2 pass the cutter assembly 5, at least a part of the supporting plate 21 passes the deviation correcting roller 11 from the upstream of the deviation correcting roller 11 to the downstream of the deviation correcting roller 11 in the delivery direction of the pole piece 3, at this time, the pole piece winding device is in the fourth state, as shown in Fig. 12, since a part of the pole piece 3 is carried by the limiting part 2112 and another part is located at the avoiding part 2111 between the two limiting parts 2112, at least a part of the two deviation correcting rollers 11 can clamp the pole piece 3 at the avoiding part 2111.

[0087] When the pole piece winding device is in the fifth state, as shown in FIG. 13, the first driving member 9 drives the feeding assembly 4 and the material supporting assembly 2 to be close to the winding needle 7 to deliver the head of the pole piece 3 to the winding needle 7, the feeding roller driving member 6 drives the two feeding rollers 41 to loosen the pole piece 3, the third driving member 24 drives the first supporting plate 212 to be away from the second supporting plate 211 to loosen the pole piece 3, the second driving member 23 drives the support 22 to be close to the feeding assembly 4, and the first driving member 9 drives the feeding assembly 4 and the material supporting assembly 2 to be away from the deviation rectifying assembly 1 to return to the initial position.

[0088] After the feeding assembly 4 and the material supporting assembly 2 return to the initial position, the pole piece winding device is in the first state, as shown in FIG. 9, and the winding needle 7 normally winds the pole piece 3 and the diaphragm 8 to form a battery cell.

[0089] As can be seen from the comparison between FIG. 6 and FIG. 11, in the embodiment shown in FIG. 11, the size of the part of the pole piece 3 that can move freely is shorter, which is more conducive to ensuring that the head of the pole piece 3 is correctly wound.

[0090] According to a second aspect of the present disclosure, there is provided a battery cell winding device, comprising the pole piece winding device according to any one of the preceding aspects.

[0091] Specifically, since a part of the pole piece 3 is carried by the limiting part 2112 and another part of the pole piece 3 is located at the avoiding part 2111 between the two limiting parts 2112, at least a part of the deviation rectifying rollers 11 can clamp the pole piece 3 at the avoiding part 2111. Compared with the related art in which the supporting plate 21 for carrying the pole piece 3 cannot pass the deviation rectifying rollers 11, resulting in that the pole piece 3 between the deviation rectifying rollers 11 and the feeding position of the pole piece 3 is in a suspended state, the present disclosure sets the avoiding part 2111, so that at least a part of the deviation rectifying rollers 11 can clamp the pole piece 3 at the avoiding part 2111 during the winding process of the pole piece 3, so that the head of the pole piece 3 is closer to the feeding position of the pole piece 3, thereby greatly shortening the size of the pole piece 3 in the suspended state, and effectively solving the problem that the pole piece 3 in the suspended state is easily damaged by colliding with other mechanisms, and significantly improving the winding reliability of the pole piece 3.

[0092] In one embodiment, the deviation rectifying assembly 1 is arranged downstream of the winding needle 7 in the delivery direction of the pole piece 3, and is configured to deliver the head of the pole piece 3 to the winding needle 7 to enable the winding needle 7 to wind the pole piece 3 and the diaphragm 8.

[0093] Specifically, as shown in FIG. 12, the battery cell winding device according to the embodiment of the present disclosure comprises a winding needle 7 and a winding needle driving member for driving the winding needle 7 to rotate around its own axis, and the winding needle driving member can drive the winding needle 7 to rotate around its own axis by using a rotary motor, a linear motor, a cylinder or other power source after the first driving member 9 delivers the head of the pole piece 3 to the winding needle 7, so as to wind the pole piece 3 and the separator 8 on the outer surface of the battery cell, thereby making the battery cell winding device be able to drive the winding needle 7 to wind the pole piece 3 and the separator 8 at any time as needed, effectively improving the winding efficiency of the battery cell and significantly enhancing the automation degree of the battery cell winding device.

[0094] The above embodiments mainly describe the differences between the embodiments, and the different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory. In view of the brevity of the writing, the details are not described here.

[0095] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration and are not intended to limit the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A pole piece winding device, comprising: a deviation rectifying assembly (1), comprising a deviation rectifying roller (11); a material supporting assembly (2), comprising a supporting plate (21), the supporting plate (21) being provided with at least two limiting portions (2112) for bearing a pole piece (3) and a avoiding portion (2111) between the at least two limiting portions (2112); in a conveying direction of the pole piece (3), at least a part of the supporting plate (21) is movable from upstream of the deviation rectifying roller (11) to downstream of the deviation rectifying roller (11), and the avoiding portion (2111) is for the deviation rectifying roller (11) to clamp the pole piece (3).

2. The pole piece in roll apparatus of claim 1, wherein, The avoiding portion (2111) has an opening (21111) facing the deviation rectifying roller (11) in a state that the supporting plate (21) is upstream of the deviation rectifying roller (11).

3. The pole piece in roll apparatus of claim 1 or 2, wherein, Upstream of the material supporting assembly (2) in the conveying direction of the pole piece (3), a feeding assembly (4) is arranged for feeding the pole piece (3) to the deviation rectifying roller (11).

4. The pole piece in roll apparatus of claim 3, wherein, Further comprising a first driving member (9) for driving the feeding assembly (4) and the material supporting assembly (2) to be close to or away from the deviation rectifying assembly (1).

5. The pole piece in roll apparatus of claim 4, wherein, The material supporting assembly (2) further comprises a support (22) and a second driving member (23), the supporting plate (21) is mounted on the support (22), and the second driving member (23) is used to drive the support (22) to be close to or away from the feeding assembly (4).

6. The pole piece in roll apparatus of any one of claims 1-5, wherein, Further comprising a cutter assembly (5) and a second driving member (23), after the cutter assembly (5) cuts off the pole piece (3), the second driving member (23) can drive the supporting plate (21) to move towards the upstream cut-off end of the pole piece (3).

7. The pole piece in roll apparatus of any one of claims 1-6, wherein, The supporting plate (21) comprises a first supporting plate (212) and a second supporting plate (211); The material supporting assembly (2) further comprises a third driving member (24) for driving the second supporting plate (211) to be close to or away from the first supporting plate (212).

8. The pole piece in roll apparatus of any one of claims 1-7, wherein, The deviation rectifying roller (11) comprises a first deviation rectifying roller (111) and a second deviation rectifying roller (112); The deviation rectifying assembly (1) further comprises a fourth driving member for driving the first deviation rectifying roller (111) to be close to or away from the second deviation rectifying roller (112).

9. An electrode winding device, comprising the pole piece winding device according to any one of claims 1-8.

10. The cell winding apparatus according to claim 9, wherein Downstream of the deviation rectifying assembly (1) in the conveying direction of the pole piece (3), a winding needle (7) is arranged, and the deviation rectifying assembly (1) is used to feed a head of the pole piece (3) to the winding needle (7) to make the winding needle (7) wind the pole piece (3) and a separator (8).

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