Pole piece coiling device and battery cell coiling equipment

Abstract

The utility model discloses a pole piece roll-in device and battery cell winding equipment, and the pole piece roll-in device comprises a deviation rectifying assembly which comprises a deviation rectifying roller; the material supporting assembly comprises a supporting plate, the supporting plate is provided with at least two limiting parts and an avoiding part located between the at least two limiting parts, and the limiting parts are used for bearing pole pieces; in the conveying direction of the pole piece, at least one part of the supporting plate can move to the downstream of the deviation rectifying roller from the upstream of the deviation rectifying roller, and the deviation rectifying roller clamps the pole piece through the receding part. According to the invention, the pole piece can be prevented from impacting other mechanisms and being damaged due to free swinging.

Description

Technical Field

[0001] The present application relates to the technical field of battery production equipment, and more specifically, to a pole piece feeding device and a battery core winding device. Background Art

[0002] During the battery production process, a pole piece feeding device is used to convey the head of a pole piece into a winding needle for winding to form a battery core. However, in the prior art, the pallet for carrying the pole piece cannot cross the deviation rectifying roller, resulting in the pole piece between the deviation rectifying roller and the winding needle being in a suspended state. Therefore, when feeding, the suspended pole piece is likely to collide with other mechanisms and be damaged.

[0003] Therefore, a new technical solution is needed to solve the above technical problems. Summary of the Invention

[0004] An object of the present application is to provide a new technical solution for a pole piece feeding device and a battery core winding device.

[0005] To achieve the above object, according to the first aspect of the present application, there is provided a pole piece feeding device, including:

[0006] A deviation rectifying assembly, the deviation rectifying assembly including a deviation rectifying roller;

[0007] A material supporting assembly, the material supporting assembly including a pallet, the pallet being provided with at least two limiting portions and an avoidance portion located between the at least two limiting portions, the limiting portions being used for carrying the pole piece;

[0008] In the conveying direction of the pole piece, at least a part of the pallet can move from the upstream of the deviation rectifying roller to the downstream of the deviation rectifying roller, and the avoidance portion is for the deviation rectifying roller to clamp the pole piece.

[0009] Optionally, the avoidance portion has an opening, and in the state where the pallet is upstream of the deviation rectifying roller, the opening faces the deviation rectifying roller.

[0010] 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 rectifying roller.

[0011] Optionally, it further includes a first driving member, 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 rectifying assembly.

[0012] Optionally, the material supporting assembly further includes a support and a second driving member, the pallet is mounted on the support; the second driving member is used for driving the support to approach or move away from the feeding assembly.

[0013] Optionally, it further includes a cutting knife assembly and a second driving member. After the cutting knife assembly cuts the pole piece, the second driving member can drive the pallet to move towards the upstream cutting end of the pole piece.

[0014] Optionally, the pallet includes a first pallet and a second pallet;

[0015] The material supporting assembly further includes a third driving member, and the third driving member is used to drive the second pallet to approach or move away from the first pallet.

[0016] Optionally, the deviation rectifying roller includes a first deviation rectifying roller and a second deviation rectifying roller;

[0017] The deviation rectifying assembly further includes a fourth driving member, and the fourth driving member is used to drive the first deviation rectifying roller to approach or move away from the second deviation rectifying roller.

[0018] According to the second aspect of the present application, there is also provided a battery cell winding device, including the pole piece feeding device as described in any one of the foregoing items.

[0019] Optionally, in the conveying direction of the pole piece, a winding needle is arranged downstream of the deviation rectifying assembly, and the deviation rectifying assembly is used to convey the head of the pole piece to the winding needle so that the winding needle winds the pole piece and the diaphragm.

[0020] In the pole piece feeding device in the embodiment of the present application, the pallet can move towards the deviation rectifying roller, and at least a part of the pallet crosses the deviation rectifying roller from the upstream of the deviation rectifying roller to reach the downstream of the deviation rectifying roller. Therefore, the position where the limiting part of the pallet bears the head of the pole piece is closer to the winding needle. When feeding the pole piece, it can effectively prevent the pole piece from hitting other mechanisms due to free swinging and being damaged.

[0021] Through the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings, other features and advantages of the present invention will become clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention.

[0023] Figure 1 It is a schematic structural diagram of a deviation rectifying roller and a pallet in an embodiment of the present invention.

[0024] Figure 2 It is a schematic structural diagram of a pallet in an embodiment of the present invention.

[0025] Figure 3 It is a schematic structural diagram of a feeding assembly and a material supporting assembly in an embodiment of the present invention.

[0026] Figure 4It is the first state diagram of the pole piece feeding device in an embodiment of the present invention.

[0027] Figure 5 It is the second state diagram of the pole piece feeding device in an embodiment of the present invention.

[0028] Figure 6 It is the third state diagram of the pole piece feeding device in an embodiment of the present invention.

[0029] Figure 7 It is the fourth state diagram of the pole piece feeding device in an embodiment of the present invention.

[0030] Figure 8 It is the fifth state diagram of the pole piece feeding device in an embodiment of the present invention.

[0031] Figure 9 It is the first state diagram of the pole piece feeding device in another embodiment of the present invention.

[0032] Figure 10 It is the second state diagram of the pole piece feeding device in another embodiment of the present invention.

[0033] Figure 11 It is the third state diagram of the pole piece feeding device in another embodiment of the present invention.

[0034] Figure 12 It is the fourth state diagram of the pole piece feeding device in another embodiment of the present invention.

[0035] Figure 13 It is the fifth state diagram of the pole piece feeding device in another embodiment of the present invention.

[0036] Description of reference numerals:

[0037] 1. Deviation rectifying assembly; 11. Deviation rectifying roller; 111. First deviation rectifying roller; 112. Second deviation rectifying roller;

[0038] 2. Material supporting assembly; 21. Support plate; 211. Second support plate; 2111. Avoiding part; 21111. Opening; 2112. Limiting part; 21121. End part; 212. First support plate; 22. Support; 221. Fixed support; 222. Movable support; 23. Second driving part; 24. Third driving part; 25. Linear rail slider mechanism;

[0039] 3. Pole piece;

[0040] 4. Feeding assembly; 41. Feeding roller;

[0041] 5. Cutting tool assembly;

[0042] 6. Feeding roller driving part;

[0043] 7. Winding needle;

[0044] 8. Diaphragm;

[0045] 9. First driving member;

[0046] 10. Main body member;

[0047] A. Upstream cutting end;

[0048] B. Downstream cutting end. Detailed implementation manners

[0049] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present application.

[0050] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as a limitation to the present application or its application or use.

[0051] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be regarded as part of the specification.

[0052] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

[0053] It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0054] In the following description, "connection" includes both direct connection between two components and indirect connection between two components through, for example, an adapter board, a middleware, etc.

[0055] In the following description, "pole piece" and "diaphragm" are only used to illustrate the working principle of the pole piece winding device and should not be regarded as part of the pole piece winding device.

[0056] In the following description, each driving member can be driven by various power sources such as a cylinder, a motor, etc.

[0057] Such as Figures 1 to 13As shown, the pole piece winding device in the embodiment of the present application includes: a deflection correction component 1, the deflection correction component 1 includes a deflection correction roller 11; a material support component 2, the material support component 2 includes a support plate 21, the support plate 21 is provided with at least two limiting portions 2112 and an avoidance portion 2111 located between at least two of the limiting portions 2112, the limiting portion 2112 is used to carry the pole piece 3; in the conveying direction of the pole piece 3, at least a part of the support plate 21 can be moved from the upstream of the deflection correction roller 11 to the downstream of the deflection correction roller 11, and the avoidance portion 2111 is provided for the deflection correction roller 11 to clamp the pole piece 3.

[0058] Specifically, the pole piece winding device described in the embodiment of the present application includes a main body 10, which can be a plate-shaped member or other suitable structure, and its main function is to carry each driving member, the deviation correction component 1 and the support component 2. In the embodiment shown below, the deviation correction component 1 includes a deviation correction roller 11, which is used to correct the pole piece 3 to avoid the pole piece 3 from being skewed and affecting the winding effect of the battery cell. There can be two deviation correction rollers 11. The support component 2 includes a support plate 21, and one or more support plates 21 can be provided to carry the pole piece 3. The support plate 21 is provided with a limiting portion 2112 and an avoidance portion 2111, and two limiting portions 2112 are provided. The limiting portion 2112 is arranged along the width direction of the support plate 21 (also the width direction of the pole piece 3 on the support plate 21) to carry the pole piece 3 located on the support plate 21 and prevent the pole piece 3 from swinging. The avoidance portion 2111 is disposed between the two limiting portions 2112 so as to allow the deviation-correcting roller 11 to clamp the pole piece 3 .

[0059] During operation, the support plate 21 moves toward the deflection correction roller 11. In the conveying direction of the pole piece 3, at least a portion of the support plate 21 gradually moves toward the deflection correction roller 11 from a position upstream of the deflection correction roller 11 and away from the deflection correction roller 11, and can pass over the deflection correction roller 11 to reach the downstream of the deflection correction roller 11. Since a portion of the pole piece 3 is carried by the limiting portion 2112, and another portion is located at the avoidance portion 2111 between the two limiting portions 2112, at least a portion of the two deflection correction rollers 11 can clamp the pole piece 3 at the avoidance portion 2111. Compared with the prior art in which the support plate 21 for carrying the pole piece 3 cannot pass over the deflection correction roller 11, resulting in the pole piece 3 between the deflection correction roller 11 and the feeding position of the pole piece 3 being in a suspended state, the present application sets an avoidance portion 2111, and during the winding process of the pole piece 3, at least a part of the deflection correction roller 11 can clamp the pole piece 3 at the avoidance portion 2111, 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 easy to collide with other mechanisms and be damaged, thereby significantly improving the winding reliability of the pole piece 3.

[0060] In addition, the limiting portions 2112 described in the embodiments of the present application may also be provided in plurality, and the plurality of limiting portions 2112 are arranged at intervals along the width direction of the pallet 21, so that a plurality of avoiding portions 2111 can also be formed. Those skilled in the art can make selections according to actual needs, and the present application does not make specific limitations herein.

[0061] In addition, it should be noted that the head of the pole piece 3 refers to one 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 an upstream cutting end A and a 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.

[0062] In one embodiment, the avoiding portion 2111 has an opening 21111. When the pallet 21 is in a state upstream of the deviation rectifying roller 11, the opening 21111 faces the deviation rectifying roller 11.

[0063] Specifically, as Figure 1 and Figure 2 shown, the avoiding portion 2111 described in the embodiments of the present application has an opening 21111, and the opening 21111 is used to avoid the deviation rectifying roller 11 when the pallet 21 moves along the conveying direction of the pole piece 3, so that the end portion 21121 of the limiting portion 2112 of the pallet 21 can directly reach the downstream of the deviation rectifying roller 11 from the upstream of the deviation rectifying roller 11 without interfering with the deviation rectifying roller 11.

[0064] For example Figure 6 and Figure 7 or Figure 11 and Figure 12 shown, when the avoiding portion 2111 of the present application is provided with the opening 21111, in the conveying direction of the pole piece 3, the pallet 21 can move towards the deviation rectifying roller 11 so that the end portion 21121 of the limiting portion 2112 reaches the downstream of the deviation rectifying roller 11 from the upstream of the deviation rectifying roller 11, effectively simplifying the overall mechanism of the pole piece coiling device and significantly reducing the manufacturing cost of the pole piece coiling device.

[0065] In addition, in other embodiments of the present application, the avoiding portion 2111 may not be provided with the opening 21111. At this time, the avoiding portion 2111 is a closed hole shape. When the pallet 21 moves towards the deviation rectifying roller 11, it is necessary to first drive the first deviation rectifying roller 111 away from the second deviation rectifying roller 112 through a fourth driving member. After the end portion of the limiting portion 2112 of the pallet 21 passes over the deviation rectifying roller 11, the fourth driving member is used to drive the first deviation rectifying roller 111 to approach the second deviation rectifying roller 112 to clamp at least a part of the pole piece 3 by the deviation rectifying roller 11.

[0066] It should be noted that when the pallet 21 is in a state upstream of the deviation rectifying roller 11, the end 21121 of the limiting portion 2112 refers to the end of the limiting portion 2112 close to the deviation rectifying roller 11, and also refers to the end of the limiting portion 2112 close to the upstream cutting end A of the pole piece 3.

[0067] In one embodiment, in the conveying direction of the pole piece 3, a feeding component 4 is arranged upstream of the material supporting component 2, and the feeding component 4 is used for conveying the pole piece 3 to the deviation rectifying roller 11.

[0068] Specifically, as Figures 3 to 12 shown, in the embodiment of the present application, the feeding component 4 is arranged on the main body member 10. The feeding component 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 adopt a rotating motor, a cylinder multi-link mechanism, etc., so that after the two feeding rollers 41 clamp the pole piece 3, they can convey it towards the deviation rectifying component 1, and then the pole piece 3 can be wound into an electric core by winding.

[0069] In addition, in other embodiments of the present application, the feeding component 4 in the embodiment of the present application may not be provided with the feeding rollers 41, but the pole piece 3 may be conveyed towards the deviation rectifying component 1 by means of clamping plates or the like.

[0070] In one embodiment of the present application, the material supporting component 2 is arranged on the feeding component 4, so that the feeding component 4 and the material supporting component 2 can move simultaneously to drive the pole piece 3 close to the deviation rectifying roller 11, and move away from the deviation rectifying roller 11 and return to the initial position after the pole piece 3 is wound by the winding needle.

[0071] In one embodiment, the pole piece winding device further includes a first driving member 9, and the first driving member 9 is used for driving the feeding component 4 and the material supporting component 2 to approach or move away from the deviation rectifying component 1.

[0072] Specifically, in the embodiment of the present application, the first driving member 9 can adopt a rotating motor, a cylinder multi-link mechanism, etc. to drive the feeding component 4 and the material supporting component 2 to approach or move away from the deviation rectifying component 1.

[0073] Thus, during the process of the feeding component 4 conveying the pole piece 3 towards the deviation rectifying roller 11, the material supporting component 2 bears the pole piece 3, gradually approaches and crosses the deviation rectifying roller 11, which can effectively ensure the stability and reliability of the pole piece 3 during conveying. After the pole piece 3 is wound, the first driving member 9 drives the feeding component 4 and the material supporting component 2 to move away from the deviation rectifying component 1 and return to the initial position.

[0074] In one embodiment, the blank holding assembly 2 further includes a support 22 and a second driving member 23. The tray 21 is mounted on the support 22. The second driving member 23 is configured to drive the support 22 to move closer to or away from the feeding assembly 4.

[0075] Specifically, as Figure 3 shown, in the embodiment of the present application, the second driving member 23 is disposed on the feeding assembly 4. The second driving member 23 can drive the support 22 to move closer to or away from the feeding assembly 4 by using a rotary motor, a cylinder, a multi-link mechanism, etc.

[0076] Thus, as Figures 8 to 11 shown, during operation, the present application can first drive the support 22 away from the feeding assembly 4 by the second driving member 23, so that the tray 21 on the support 22 can be closer to the head of the pole piece 3, effectively avoiding the situation that the pole piece 3 is bent and the preparation quality of the battery cell is poor, and further improving the control effect of the pole piece feeding device of the present application on the head of the pole piece 3.

[0077] In one embodiment, the pole piece feeding device further includes a cutting tool assembly 5 and a second driving member 23. After the cutting tool assembly 5 cuts the pole piece 3, the second driving member 23 can drive the tray 21 to move towards the upstream cutting end of the pole piece 3.

[0078] Specifically, the cutting tool assembly 5 in the embodiment of the present application includes a pole piece cutting tool and a cutting tool driving member for driving the pole piece cutting tool to move. The cutting tool driving member can drive the pole piece cutting tool to cut the pole piece 3 by using a rotary motor, a cylinder, a multi-link mechanism, etc.

[0079] Furthermore, as Figure 10 and Figure 11As shown, after the cutting blade 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, that is, the pole piece 3 is divided into a wound pole piece and a to-be-wound pole piece. The upstream cutting end A of the pole piece 3 is located on the to-be-wound pole piece, and the downstream cutting end B of the pole piece 3 is located on the to-be-wound pole piece. At this time, the wound pole piece is wound into an electric core by the winding needle 7, and the to-be-wound pole piece is clamped by the feeding roller 41 of the feeding assembly 4. The pole piece feeding device can drive the support plate 21 to move towards the upstream cutting end A of the pole piece 3 through the second driving member 23, so that the end 21121 of the limiting portion 2112 is closer to the upstream cutting end A of the pole piece 3, thereby effectively realizing that the support plate 21 approaches the head of the pole piece 3 and bears the head of the pole piece 3, making the size of the head of the pole piece 3 that can move freely shorter, and further improving the control effect of the pole piece feeding device on the head of the pole piece 3. After the pole piece 3 is fed into the roll, the second driving member 23 drives the support plate 21 to approach the feeding assembly 4, and the first driving member 9 drives the feeding assembly 4 and the supporting component 2 back to the initial position.

[0080] In one embodiment, the support plate 21 includes a first support plate 212 and a second support plate 211; the supporting component 2 further includes a third driving member 24, and the third driving member 24 is used to drive the second support plate 211 to approach or away from the first support plate 212.

[0081] Specifically, as Figure 3 shown, in the embodiment shown below, the fixed support 221 and the movable support 222 are installed on the support 22 of the embodiment of the present application. The fixed support 221 is fixedly connected to the support 22, and the movable support 222 is connected to the support 22 through a linear rail slider mechanism 25.

[0082] Wherein, 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 slider mechanism 25.

[0083] Thus, since the first support plate 212 is arranged on the movable support 222, the third driving member 24 can use a rotary motor, a cylinder multi-link mechanism, etc. to drive the first support plate 212 to approach the second support plate 211 to clamp the pole piece 3, or drive the first support plate 212 to move away from the second support plate 211 to release the pole piece 3, thereby effectively improving the stability and reliability of the pole piece 3 during transportation.

[0084] In other embodiments of the present application, the third driving member 24 can drive the first supporting plate 212 and the second supporting plate 211 to move simultaneously, so that the two approach or move away from each other. That is to say, the third driving member 24 is used to drive the second supporting plate 211 to approach or move away from the first supporting plate 212, which includes both the case where the third driving member 24 only drives one supporting plate 21 and the case where it drives two supporting plates 21 simultaneously.

[0085] In one embodiment, the deviation rectifying roller 11 includes a first deviation rectifying roller 111 and a second deviation rectifying roller 112; the deviation rectifying assembly 1 further includes a fourth driving member, and the fourth driving member is used to drive the first deviation rectifying roller 111 to approach or move away from the second deviation rectifying roller 112.

[0086] Specifically, in the embodiments of the present application, the fourth driving member can adopt a rotary motor, a cylinder multi-link mechanism, etc. to drive the first deviation rectifying roller 111 to approach or move away from the second deviation rectifying roller 112.

[0087] Thus, when the supporting plate 21 moves towards the deviation rectifying roller 11, the fourth driving member can first drive the first deviation rectifying roller 111 to move away from the second deviation rectifying roller 112, so that the supporting plate 21 can pass over the first deviation rectifying roller 111 and the second deviation rectifying roller 112, and then the fourth driving member can drive the first deviation rectifying roller 111 to approach the second deviation rectifying roller 112, so that at least a part of the first deviation rectifying roller 111 and the second deviation rectifying roller 112 can be located at the avoidance portion 2111 of the supporting plate 21 to clamp the pole piece 3 at the avoidance portion 2111 located between the two limiting portions 2112. In this way, the situation that the supporting plate 21 collides with the deviation rectifying roller 11 and is damaged when passing over the deviation rectifying roller 11 is effectively avoided, and the clamping reliability of the first deviation rectifying roller 111 and the second deviation rectifying roller 112 on the pole piece 3 is significantly ensured. Similarly, the fourth driving member can drive the first deviation rectifying roller 111 to approach or move away from the second deviation rectifying roller 112, which includes both the case of driving only one deviation rectifying roller and the case of driving two deviation rectifying rollers simultaneously.

[0088] Among them, in one embodiment, as Figure 4 shown, 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 at the initial positions away from the deviation rectifying assembly 1, and the winding needle 7 normally winds the pole piece 3 and the diaphragm 8 to form an electric core.

[0089] After the electric core is wound, the pole piece winding device is in the second state, as Figure 5 shown, the feeding roller driving member 6 of the feeding assembly 4 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 off the pole piece 3.

[0090] After the pole piece 3 is cut, the pole piece winding device is in the third state. As Figure 6 shown, the first driving member 9 drives the feeding assembly 4 and the supporting assembly 2 to continue to approach the deviation rectifying assembly 1 and cross over the cutting tool assembly 5.

[0091] After the feeding assembly 4 and the supporting assembly 2 cross over the cutting tool assembly 5, at least a part of the supporting plate 21 crosses over the deviation rectifying roller 11 from the upstream of the deviation rectifying roller 11 to the downstream of the deviation rectifying 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 Figure 7 shown, since a part of the pole piece 3 is carried by the limiting portion 2112 and another part is located at the avoiding portion 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 portion 2111.

[0092] When the pole piece winding device is in the fifth state, as Figure 8 shown, after the supporting assembly 2 crosses over the deviation rectifying assembly 1, the head of the pole piece 3 is brought close to the winding needle 7 to convey 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 from each other 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. The first driving member 9 drives the feeding assembly 4 and the supporting assembly 2 to move away from the deviation rectifying assembly 1 and return to the initial position.

[0093] After the feeding assembly 4 and the supporting assembly 2 return to the initial position, the pole piece winding device is in the first state. As Figure 4 shown, the winding needle 7 normally winds the pole piece 3 and the separator 8 to form an electric core.

[0094] In addition, in one embodiment, as Figure 9 shown, 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 supporting assembly 2 are kept at the initial position away from the deviation rectifying assembly 1. The winding needle 7 normally winds the pole piece 3 and the separator 8 to form an electric core.

[0095] After the electric core winding is completed, the pole piece winding device is in the second state. As Figure 10 shown, the feeding roller driving member 6 of the feeding assembly 4 drives the feeding rollers 41 of the feeding assembly 4 to clamp the pole piece 3. The cutter driving member of the cutting tool assembly 5 drives the pole piece cutter to cut the pole piece 3.

[0096] After the pole piece 3 is cut, the pole piece winding device is in the third state. As Figure 11As shown, the second driving member 23 drives the pallet 21 to move towards the upstream cutting end A of the pole piece 3, so that the end 21121 of the limiting portion 2112 is closer to the upstream cutting end A of the pole piece 3. The first driving member 9 drives the feeding assembly 4 and the supporting assembly 2 to continue to approach the deviation rectifying assembly 1 and cross the cutting tool assembly 5.

[0097] After the feeding assembly 4 and the supporting assembly 2 cross the cutting tool assembly 5, in the conveying direction of the pole piece 3, at least a part of the pallet 21 crosses the deviation rectifying roller 11 from the upstream of the deviation rectifying roller 11 to the downstream of the deviation rectifying roller 11. At this time, the pole piece winding device is in the fourth state, as Figure 12 shown. Since a part of the pole piece 3 is carried by the limiting portion 2112 and another part is located at the avoidance portion 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 avoidance portion 2111.

[0098] When the pole piece winding device is in the fifth state, as Figure 13 shown, the first driving member 9 drives the feeding assembly 4 and the supporting assembly 2 to approach the winding needle 7 to convey 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 pallet 212 away from the second pallet 211 to loosen the pole piece 3. The second driving member 23 drives the support 22 to approach the feeding assembly 4. The first driving member 9 drives the feeding assembly 4 and the supporting assembly 2 to move away from the deviation rectifying assembly 1 and return to the initial position.

[0099] After the feeding assembly 4 and the supporting assembly 2 return to the initial position, the pole piece winding device is in the first state, as Figure 9 shown. The winding needle 7 normally winds the pole piece 3 and the diaphragm 8 to form an electric core.

[0100] Comparing Figure 6 and Figure 11 it can be seen that in the embodiment shown in Figure 11 , the dimension in which the head of the pole piece 3 can move freely is shorter, which is more beneficial to ensure the correct winding of the head of the pole piece 3.

[0101] According to the second aspect of the present application, a battery cell winding device is provided, including the pole piece winding device as described in any one of the foregoing items.

[0102] Specifically, since a part of the electrode sheet 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 rectifying rollers 11 can clamp the electrode sheet 3 at the avoiding part 2111. Compared with the prior art where the pallet 21 for carrying the electrode sheet 3 cannot cross over the deviation rectifying rollers 11, resulting in the electrode sheet 3 between the deviation rectifying rollers 11 and the feeding position of the electrode sheet 3 being in a suspended state, in this application, by providing the avoiding part 2111, during the process of the electrode sheet 3 being wound into the roll, at least a part of the deviation rectifying rollers 11 can clamp the electrode sheet 3 at the avoiding part 2111, making the head of the electrode sheet 3 closer to the feeding position of the electrode sheet 3. Thereby, the size of the electrode sheet 3 in the suspended state is greatly shortened, and the problem that the electrode sheet 3 in the suspended state is prone to hitting other mechanisms and being damaged is effectively solved, significantly improving the reliability of the electrode sheet 3 being wound into the roll.

[0103] In one embodiment, in the conveying direction of the electrode sheet 3, a winding needle 7 is arranged downstream of the deviation rectifying assembly 1. The deviation rectifying assembly 1 is used to convey the head of the electrode sheet 3 to the winding needle 7 so that the winding needle 7 winds the electrode sheet 3 and the separator 8.

[0104] Specifically, as Figure 12 shown, the battery cell winding device in the embodiment of this application includes a winding needle 7 and a winding needle driving member for driving the winding needle 7 to rotate around its own axis. After the first driving member 9 conveys the head of the electrode sheet 3 to the winding needle 7, the winding needle driving member can drive the winding needle 7 to rotate around its own axis by using power sources such as a rotating motor, a linear motor, and a cylinder to wind the electrode sheet 3 and the separator 8 on the outer surface of the battery cell. Thereby, the battery cell winding device can drive the winding needle 7 to wind the electrode sheet 3 and the separator 8 at any time according to needs, effectively improving the winding efficiency of the battery cell and significantly enhancing the automation degree of the battery cell winding device.

[0105] In the above embodiments, the differences between the various embodiments are mainly described. As long as the different optimized features between the various embodiments are not contradictory, they can be combined to form a more optimal embodiment. Considering the simplicity of the writing, they will not be elaborated here.

[0106] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration purposes and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A pole piece winding device, characterized in that: include: A deviation correction component (1), wherein the deviation correction component (1) comprises a deviation correction roller (11); A support assembly (2), the support assembly (2) comprising a support plate (21), the support plate (21) being provided with at least two limiting portions (2112) and an avoidance portion (2111) located between the at least two limiting portions (2112), the limiting portions (2112) being used to carry a pole piece (3); In the conveying direction of the pole piece (3), at least a portion of the support plate (21) can move from the upstream of the deflection correction roller (11) to the downstream of the deflection correction roller (11), and the avoidance portion (2111) is provided for the deflection correction roller (11) to clamp the pole piece (3).

2. The pole piece winding device according to claim 1, characterized in that: The avoidance portion (2111) has an opening (21111), and when the support plate (21) is located upstream of the deviation correction roller (11), the opening (21111) faces the deviation correction roller (11).

3. The pole piece winding device according to claim 1, characterized in that: In the conveying direction of the pole piece (3), a feeding assembly (4) is arranged upstream of the supporting assembly (2), and the feeding assembly (4) is used to convey the pole piece (3) to the deviation correction roller (11).

4. The pole piece winding device according to claim 3, characterized in that: It also includes a first driving member (9), wherein the first driving member (9) is used to drive the feeding assembly (4) and the supporting assembly (2) to approach or move away from the deviation correcting assembly (1).

5. The pole piece winding device according to claim 4, characterized in that: The support assembly (2) further comprises a support (22) and a second driving member (23), wherein the support plate (21) is mounted on the support (22); the second driving member (23) is used to drive the support (22) to approach or move away from the feeding assembly (4).

6. The pole piece winding device according to claim 1, characterized in that: It also comprises 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 support plate (21) to move toward the upstream cut-off end of the pole piece (3).

7. The pole piece winding device according to claim 1, characterized in that: The support plate (21) comprises a first support plate (212) and a second support plate (211); The material supporting assembly (2) further comprises a third driving member (24), wherein the third driving member (24) is used to drive the second supporting plate (211) to approach or move away from the first supporting plate (212).

8. The pole piece winding device according to claim 1, characterized in that: The deflection correction roller (11) comprises a first deflection correction roller (111) and a second deflection correction roller (112); The deflection correcting assembly (1) further comprises a fourth driving member, wherein the fourth driving member is used to drive the first deflection correcting roller (111) to move closer to or away from the second deflection correcting roller (112).

9. A battery cell winding device, characterized in that: It comprises a pole piece winding device as described in any one of claims 1 to 8.

10. The battery cell winding device according to claim 9, characterized in that: In the conveying direction of the pole piece (3), a winding needle (7) is arranged downstream of the deviation correction component (1), and the deviation correction component (1) is used to convey the head of the pole piece (3) to the winding needle (7), so that the winding needle (7) winds the pole piece (3) and the diaphragm (8).

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