Battery cell winding device

Abstract

The utility model discloses a battery core winding device which comprises a rotating tower, a winding device, a winding device, a winding device, a winding device, a winding device, a winding device and a winding device, and the rotating tower is provided with a winding needle and can rotate to enable the winding needle to be located at a winding station or a rubberizing station; in the first pole piece conveying direction, a first pole piece cutter is arranged at the upstream of the winding station, and a diaphragm cutter is arranged between the winding station and the rubberizing station; the first pole piece cutter is used for cutting off a first pole piece after the winding needle reaches the rubberizing station, and the diaphragm cutter is used for cutting off a diaphragm after the first pole piece cutter cuts off the first pole piece, so that the length of the winding needle for automatically winding the diaphragm at the rubberizing station is smaller than the length of the wound first pole piece. The safety and the use performance of the battery can be improved.

Description

Technical Field

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

[0002] During the battery production process, a core winding device is used to wind a separator and electrode sheets around the outer surface of a core to form a battery core. However, in the existing core winding devices, the separator is used to finish winding the core, which easily leads to poor safety and performance of the battery.

[0003] Therefore, a new technical solution is needed to solve the above technical problems. Utility Model Content

[0004] An object of this application is to provide a new technical solution for a core winding device.

[0005] To achieve the above object, according to the first aspect of this application, a core winding device is provided, including:

[0006] A turret, which is provided with a winding needle, and the turret can rotate to make the winding needle in a winding station or a taping station;

[0007] In the first electrode sheet conveying direction, a first electrode sheet cutter is arranged upstream of the winding station, and a separator cutter is arranged between the winding station and the taping station;

[0008] The first electrode sheet cutter is used to cut the first electrode sheet after the winding needle reaches the taping station, and the separator cutter is used to cut the separator after the first electrode sheet cutter cuts the first electrode sheet, so that the length of the separator wound by the winding needle rotating at the taping station is less than the length of the first electrode sheet wound.

[0009] Optionally, a second electrode sheet cutter is further arranged upstream of the winding station, and the second electrode sheet cutter cuts the second electrode sheet before the first electrode sheet cutter cuts the first electrode sheet.

[0010] Optionally, it further includes a blowing component and a material supporting component. After the first electrode sheet cutter cuts the first electrode sheet, the blowing component can blow the first electrode sheet to the material supporting component;

[0011] The material supporting component is located downstream of the separator cutter. After the blowing component blows the first electrode sheet to the material supporting component, the separator cutter cuts the separator.

[0012] Optionally, the blowing component includes a blowing roller and an air joint. The blowing roller is provided with blowing grooves, the blowing grooves are arranged along the axial direction of the blowing roller, and the air joint is communicated with the blowing grooves.

[0013] Optionally, the material supporting assembly includes a supporting plate and a first driving member. The supporting plate includes adsorption holes for adsorbing the first pole piece. The first driving member is used to drive the supporting plate to approach or move away from the coiling needle at the glue pasting station.

[0014] Optionally, it further includes a deviation rectifying assembly. The deviation rectifying assembly includes a clamping jaw and a second driving member. A sensor is installed on the clamping jaw. The clamping jaw can clamp the first pole piece on the material supporting assembly. The sensor is used to detect the position of the first pole piece on the material supporting assembly. The second driving member is used to adjust the position of the first pole piece on the material supporting assembly along the axial direction of the coiling needle at the glue pasting station according to the first pole piece position signal sent by the sensor.

[0015] Optionally, the clamping jaw is provided with a rotatable first clamping roller and a rotatable second clamping roller. The clamping jaw can act to make the first clamping roller and the second clamping roller clamp the first pole piece on the material supporting assembly.

[0016] Optionally, the deviation rectifying assembly further includes a third driving member, and the third driving member is connected to the second driving member.

[0017] The third driving member is used to drive the first clamping roller and the second clamping roller to approach or move away from the coiling needle at the glue pasting station, and the moving speed of the third driving member driving the first clamping roller and the second clamping roller to approach the coiling needle at the glue pasting station is less than the rotation linear speed of the coiling needle at the glue pasting station.

[0018] Optionally, the material supporting assembly includes a supporting plate and a first driving member. The supporting plate includes adsorption holes for adsorbing the first pole piece. The first driving member is used to drive the supporting plate to approach or move away from the coiling needle at the glue pasting station.

[0019] The supporting plate further includes a notch, and the clamping jaw can adjust the position of the first pole piece on the material supporting assembly along the axial direction of the coiling needle at the glue pasting station at the notch.

[0020] Optionally, the coiling needle includes a first half coiling needle and a second half coiling needle, and the turret can rotate to make the coiling needle in the blanking station.

[0021] At the blanking station, the first half coiling needle and the second half coiling needle are in the retracted state.

[0022] During the process of the coiling needle rotating from the blanking station to the winding station, the first half coiling needle is in the extended state and the second half coiling needle is in the retracted state, so that the first half coiling needle straightens the two diaphragms.

[0023] In the cell winding device according to the embodiment of the present application, the separator cutter is used to cut the separator after the first electrode sheet cutter cuts the first electrode sheet, so that the length of the separator wound by the winding needle rotating on its own at the gluing station is less than the length of the first electrode sheet wound. Therefore, after the separator is completely wound around the cell by the winding needle, the first electrode sheet has not been completely wound onto the cell. In this way, after the cell winding is completed, the cell is ended with the electrode sheet, thereby effectively improving the safety and service performance of the battery.

[0024] Other features and advantages of the present invention will become clear from the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings incorporated in and forming a part of this specification illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0026] Figure 1 is a first state diagram of a cell winding device according to an embodiment of the present invention.

[0027] Figure 2 is a second state diagram of a cell winding device according to an embodiment of the present invention.

[0028] Figure 3 is a third state diagram of a cell winding device according to an embodiment of the present invention.

[0029] Figure 4 is a fourth state diagram of a cell winding device according to an embodiment of the present invention.

[0030] Figure 5 is a fifth state diagram of a cell winding device according to an embodiment of the present invention.

[0031] Figure 6 is a sixth state diagram of a cell winding device according to an embodiment of the present invention.

[0032] Figure 7 is a schematic structural diagram of a blowing component according to an embodiment of the present invention.

[0033] Figure 8 is a schematic structural diagram of a material supporting component according to an embodiment of the present invention.

[0034] Figure 9 is a schematic structural diagram of a deviation rectifying component according to an embodiment of the present invention.

[0035] Figure 10 is a schematic structural diagram of an electrode sheet and a supporting plate according to an embodiment of the present invention.

[0036] Figure 11It is a schematic structural diagram of a sensor for detecting the position of a pole piece in an embodiment of the present utility model.

[0037] Description of the reference numerals:

[0038] 1. Turret; 101. Winding station; 102. Gluing station; 103. Unloading station; 104. Winding needle; 1041. First half winding needle; 1042. Second half winding needle;

[0039] 2. Pole piece; 201. First pole piece; 202. Second pole piece;

[0040] 3. Diaphragm; 301. First diaphragm; 302. Second diaphragm;

[0041] 4. Blowing component; 401. Blowing roller; 4011. Blowing groove; 402. Air joint;

[0042] 5. Diaphragm cutter;

[0043] 6. Pole piece cutter; 601. First pole piece cutter; 602. Second pole piece cutter;

[0044] 7. Material supporting component; 701. Support plate; 7011. Adsorption hole; 7012. Notch; 702. First driving part;

[0045] 8. Deviation rectifying component; 801. Claw; 8011. Clamping rod; 80111. First clamping roller; 80112. Second clamping roller; 80113. Pole piece clamping channel; 8012. Sensor; 80121. First sensor; 80122. Second sensor; 802. Second driving part; 803. Third driving part; 804. Connecting plate;

[0046] 9. Ideal position of the pole piece;

[0047] 10. Actual position of the pole piece. Detailed implementation manners

[0048] Now, various exemplary embodiments of the present application will 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.

[0049] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way a limitation on the present application or its application or use.

[0050] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the specification.

[0051] 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.

[0052] 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 further discussed in subsequent figures.

[0053] In the following description, "connection" includes both direct connection between two components and indirect connection between them through, for example, an adapter board, middleware, etc.

[0054] In the following description, "pole piece" and "separator" are only used to illustrate the working principle of the battery cell winding device and should not be regarded as part of the battery cell winding device.

[0055] In the following description, each driving member can be driven by various power sources such as air cylinders, motors, etc.

[0056] As Figure 1 shown, the battery cell winding device in the embodiment of the present application includes: a turret 1, the turret 1 is provided with a winding needle 104, and the turret 1 can rotate to make the winding needle 104 in a winding station 101 or an adhesive pasting station 102; in the conveying direction of the first pole piece 201, a first pole piece cutter 601 is arranged upstream of the winding station 101, and a separator cutter 5 is arranged between the winding station 101 and the adhesive pasting station 102; the first pole piece cutter 601 is used to cut off the first pole piece 201 after the winding needle 104 reaches the adhesive pasting station 102, and the separator cutter 5 is used to cut off the separator 3 after the first pole piece cutter 601 cuts off the first pole piece 201, so that the length of the separator 3 wound by the winding needle 104 rotating at the adhesive pasting station 102 is less than the length of the first pole piece 201 wound.

[0057] Specifically, as Figures 1 to 6As shown in the figure, the turret 1 in the embodiment of the present application includes a winding station 101 and a pasting station 102. Winding needles 104 are provided on both the winding station 101 and the pasting station 102. The winding needles 104 both have an extended state extending out of the turret 1 and a retracted state retracting into the turret 1. The turret 1 is provided with a fourth driving member and a fifth driving member. The fourth driving member can drive the turret 1 to rotate around its own axis by using a rotating motor, a cylinder multi-link mechanism, etc., so as to drive the winding needle 104 located at the winding station 101 to flip to the pasting station 102; or drive the winding needle 104 located at the pasting station 102 to flip to the winding station 101. The fifth driving member can drive the winding needle 104 to rotate around its own axis by using power sources such as a rotating motor, a linear motor, and a cylinder, so as to wind the electrode sheet 2 and the separator 3 on the outer surface of the battery cell. The turret 1 is further provided with a sixth driving member. The sixth driving member can drive the winding needle 104 to extend out of the turret 1 or retract into the turret 1 by using power sources such as a rotating motor, a linear motor, and a cylinder.

[0058] Wherein, for clarity, the rotation of the turret 1 around its own axis is called "revolution", and the rotation of the winding needle 104 around its own axis is called "rotation".

[0059] Thus, during operation, the winding needle 104 on the winding station 101 extends out of the turret 1 under the drive of the sixth driving member. Under the drive of the fifth driving member, the winding needle 104 rotates to wind the first electrode sheet 201 and the separator 3 on the outer surface of the battery cell. In the conveying direction of the first electrode sheet 201, a first electrode sheet cutter 601 is provided upstream of the winding station 101, and a separator cutter 5 is provided between the winding station 101 and the pasting station 102. In this way, after the fourth driving member drives the turret 1 to revolve to drive the winding needle 104 located at the winding station 101 to reach the pasting station 102, the first electrode sheet cutter 601 cuts off the first electrode sheet 201, and then the separator cutter 5 cuts off the separator 3, so that the length of the separator 3 wound by the winding needle 104 rotating at the pasting station 102 is less than the length of the first electrode sheet 201 wound.

[0060] Furthermore, since the length of the separator 3 wound by the winding needle 104 rotating at the pasting station 102 is less than the length of the first electrode sheet 201 wound, after the separator 3 is completely wound on the battery cell by the winding needle 104, the first electrode sheet 201 has not been completely wound on the battery cell. In this way, after the battery cell winding is completed, the battery cell can be ended with the electrode sheet 2, effectively improving the safety and service performance of the battery.

[0061] In one embodiment, a second pole piece cutter 602 is further provided upstream of the winding station 101. Before the first pole piece cutter 601 cuts off the first pole piece 201, the second pole piece cutter 602 cuts off the second pole piece 202.

[0062] Specifically, as Figure 2 and Figure 3 shown, during operation, the winding needle 104 on the winding station 101 extends out of the turret 1 under the drive of the sixth driving member. Under the drive of the fifth driving member, the winding needle 104 rotates self - to wind the first pole piece 201, the second pole piece 202, the first separator 301, and the second separator 302 on the outer surface of the battery cell simultaneously. In the conveying direction of the second pole piece 202, a second pole piece cutter 602 is further provided upstream of the winding station 101. Thus, before the fourth driving member drives the turret 1 to revolve to drive the winding needle 104 located at the winding station 101 to flip to the gluing station 102, the second pole piece cutter 602 first cuts off the second pole piece 202; then the fourth driving member drives the turret 1 to revolve to drive the winding needle 104 located at the winding station 101 to reach the gluing station 102, so that the winding needle 104 winds the second pole piece 202; finally, the first pole piece cutter 601 cuts off the first pole piece 201, and the separator cutter 5 cuts off the first separator 301 and the second separator 302, so that the length of the separator 3 wound by the winding needle 104 at the gluing station 102 is less than the length of the first pole piece 201 wound.

[0063] Furthermore, since the second pole piece cutter 602 first cuts off the second pole piece 202, the second pole piece 202 can be wound by the winding needle 104 between the first separator 301 and the second separator 302. When the separator cutter 5 cuts off the first separator 301 and the second separator 302 subsequently, the second pole piece 202 will not be cut off, effectively avoiding the situation of short - circuit caused by the contact between the first pole piece 201 and the second pole piece 202, and further improving the safety and service performance of the battery.

[0064] In addition, in the embodiment of the present application, the first pole piece 201 can be the positive electrode sheet 2, and the second pole piece 202 can be the negative electrode sheet 2; or, the first pole piece 201 can be the negative electrode sheet 2, and the second pole piece 202 can be the positive electrode sheet 2. Those skilled in the art can select according to actual needs, and the present application does not make specific limitations here.

[0065] In one embodiment, the cell winding device further includes a blowing component 4 and a material supporting component 7. After the first pole piece cutter 601 cuts the first pole piece 201, the blowing component 4 can blow the first pole piece 201 to the material supporting component 7; the material supporting component 7 is located downstream of the separator cutter 5. After the blowing component 4 blows the first pole piece 201 to the material supporting component 7, the separator cutter 5 cuts the separator 3.

[0066] Specifically, as Figure 5 shown, in the embodiment of the present application, the blowing component 4 is located between the first pole piece 201 and the first separator 301, and the material supporting component 7 is located downstream of the separator cutter 5. Thus, after the first pole piece cutter 601 cuts the first pole piece 201, the blowing component 4 can blow the first pole piece 201 to the material supporting component 7, thereby effectively avoiding the situation that the first pole piece 201 randomly drops and affects the cell winding efficiency.

[0067] In addition, after the blowing component 4 blows the first pole piece 201 to the material supporting component 7, the separator cutter 5 cuts the separator 3, so that the length of the separator 3 wound by the winding needle 104 at the adhesive pasting station 102 is less than the length of the first pole piece 201 wound.

[0068] In one embodiment, the blowing component 4 includes a blowing roller 401 and an air connector 402. The blowing roller 401 is provided with a blowing groove 4011, the blowing groove 4011 is arranged along the axial direction of the blowing roller 401, and the air connector 402 is communicated with the blowing groove 4011.

[0069] Specifically, as Figure 7 shown, in the embodiment of the present application, by arranging the blowing groove 4011 along the axial direction of the blowing roller 401, after the air connector 402 is communicated with the blowing groove 4011, the blowing groove 4011 can blow the first pole piece 201 to the material supporting component 7 along the width direction of the first pole piece 201, thereby further avoiding the situation that the first pole piece 201 randomly drops and results in poor cell winding efficiency.

[0070] In addition, the blowing groove 4011 in the embodiment of the present application may not be arranged along the axial direction of the blowing roller 401, as long as it can blow the first pole piece 201 to the material supporting component 7. Those skilled in the art can select according to actual needs, and the present application does not make specific limitations here.

[0071] In one embodiment, the battery cell winding device further includes a deviation rectifying assembly 8. The deviation rectifying assembly 8 includes a clamping jaw 801 and a second driving member 802. A sensor 8012 is installed on the clamping jaw 801. The clamping jaw 801 can clamp the first pole piece 201 on the material supporting assembly 7. The sensor 8012 is used to detect the position of the first pole piece 201 on the material supporting assembly 7. The second driving member 802 is used to adjust the position of the first pole piece 201 on the material supporting assembly 7 along the axial direction of the winding needle 104 at the adhesive pasting station 102 according to the position signal of the first pole piece 201 sent by the sensor 8012.

[0072] Specifically, after the first pole piece 201 is blown onto the material supporting assembly 7 by the material blowing assembly 4, the length of the first pole piece 201 is relatively long, and the tail end of the first pole piece 201 is in a free state. Therefore, when the winding needle 104 at the adhesive pasting station 102 winds the first pole piece 201, the alignment of the battery cell will become poor.

[0073] Thus, as Figure 10 shown, in the embodiment of the present application, to solve the above problems, a deviation rectifying assembly 8 is provided. The clamping jaw 801 of the deviation rectifying assembly 8 can clamp the tail end of the first pole piece 201, and can detect whether the position of the first pole piece 201 deviates through the sensor 8012 to rectify the first pole piece 201. For example Figure 11 shown, when the sensor 8012 detects that there is a deviation between the actual position 10 of the pole piece of the first pole piece 201 and the ideal position 9 of the pole piece, the second driving member 802 can adjust the position of the first pole piece 201 on the material supporting assembly 7 along the axial direction of the winding needle 104 at the adhesive pasting station 102 according to the signal of the actual position 10 of the pole piece sent by the sensor 8012, so that the actual position 10 of the pole piece of the first pole piece 201 coincides with the ideal position 9 of the pole piece, thereby effectively improving the winding alignment of the battery cell.

[0074] In addition, it should be noted that the tail end of the first pole piece 201 refers to the direction in which the first pole piece 201 is away from the winding needle 104 at the adhesive pasting station 102.

[0075] In one embodiment, the clamping jaw 801 is installed with a rotatable first clamping roller 80111 and a rotatable second clamping roller 80112; the clamping jaw 801 can act to make the first clamping roller 80111 and the second clamping roller 80112 clamp the first pole piece 201 on the material supporting assembly 7.

[0076] Specifically, as Figure 9As shown, the gripper 801 in the embodiment of the present application is equipped with pinch rollers 8011. The pinch rollers 8011 include a rotatable first pinch roller 80111 and a rotatable second pinch roller 80112. A pole piece clamping channel 80113 is formed between the first pinch roller 80111 and the second pinch roller 80112, so that the gripper 801 can act to make the first pinch roller 80111 and the second pinch roller 80112 clamp the first pole piece 201 on the material supporting assembly 7.

[0077] Thus, when the first pole piece 201 is subsequently conveyed to the winding needle 104 at the glue sticking station 102, the first pole piece 201 can be straightened, so that the deviation rectifying effect of the deviation rectifying assembly 8 is better, and the winding efficiency of the battery cell can be further improved.

[0078] Among them, the sensor 8012 in the embodiment of the present application includes a first sensor 80121 and a second sensor 80122. The first sensor 80121 is arranged on the first pinch roller 80111, and the second sensor 80122 is arranged on the second pinch roller 80112.

[0079] In addition, in the embodiment of the present application, a fixed first pinch roller 80111 and a second pinch roller 80112 can also be set, as long as the winding efficiency of the battery cell can be guaranteed. Those skilled in the art can select according to actual needs, and the present application does not make specific limitations here.

[0080] In one embodiment, the deviation rectifying assembly 8 further includes a third driving member 803. The third driving member 803 is connected to the second driving member 802. The third driving member 803 is used to drive the first pinch roller 80111 and the second pinch roller 80112 to approach or move away from the winding needle 104 at the glue sticking station 102, and the moving speed of the third driving member 803 driving the first pinch roller 80111 and the second pinch roller 80112 to approach the winding needle 104 at the glue sticking station 102 is less than the rotational linear speed of the winding needle 104 at the glue sticking station 102.

[0081] Specifically, as Figure 9As shown, when the second driving member 802 adjusts the position of the first pole piece 201 on the material supporting assembly 7 along the axial direction of the winding needle 104 at the glue sticking station 102 according to the actual position 10 signal of the pole piece sent by the sensor 8012, so that the actual position 10 of the first pole piece 201 coincides with the ideal position 9 of the pole piece, the third driving member 803 drives the first pinch roller 80111 and the second pinch roller 80112 to approach the winding needle 104 at the glue sticking station 102, so as to convey the first pole piece 201 to the winding needle 104 at the glue sticking station 102, and realize the winding of the first pole piece 201 by the winding needle 104. Wherein, the deviation rectifying assembly 8 in the embodiment of the present application further includes a connecting plate 804, the connecting plate 804 is provided with the clamping jaws 801, and the connecting plate 804 is connected with the second driving member 802.

[0082] In addition, in the embodiment of the present application, by setting the moving speed of the third driving member 803 driving the first pinch roller 80111 and the second pinch roller 80112 to approach the winding needle 104 at the glue sticking station 102 to be less than the rotation linear speed of the winding needle 104 at the glue sticking station 102, the first pole piece 201 is always in a tensioned state, so as to further improve the winding efficiency of the battery cell.

[0083] In addition, since the first pinch roller 80111 and the second pinch roller 80112 that can rotate are provided in the present application, when the moving speed of the third driving member 803 driving the first pinch roller 80111 and the second pinch roller 80112 to approach the winding needle 104 at the glue sticking station 102 is greater than or equal to the rotation linear speed of the winding needle 104 at the glue sticking station 102, the first pole piece 201 can move relative to the first pinch roller 80111 and the second pinch roller 80112. Furthermore, the situation that the first pole piece 201 is broken due to inconsistent speeds is effectively avoided, and the production quality of the battery cell is significantly improved.

[0084] In one embodiment, the material supporting assembly 7 includes a supporting plate 701 and a first driving member 702. The supporting plate 701 includes adsorption holes 7011 for adsorbing the first pole piece 201. The first driving member 702 is used to drive the supporting plate 701 to approach or move away from the winding needle 104 at the glue sticking station 102. The supporting plate 701 further includes a notch 7012, and the clamping jaws 801 can adjust the position of the first pole piece 201 on the material supporting assembly 7 along the axial direction of the winding needle 104 at the glue sticking station 102 at the notch 7012.

[0085] Specifically, as Figure 8 、 Figure 10 and Figure 11As shown, before the blowing component 4 blows the first pole piece 201 to the material supporting component 7, the first driving member 702 drives the supporting plate 701 to move closer to the coiling needle 104 at the glue sticking station 102, and positions the supporting plate 701 below the first pole piece 201 to be folded. Then, after the blowing component 4 blows the first pole piece 201 to the material supporting component 7, the adsorption holes 7011 of the supporting plate 701 adsorb the first pole piece 201 blown by the blowing component 4.

[0086] Thus, in the embodiment of the present application, through the arrangement of the supporting plate 701 and the first driving member 702, the position of the first pole piece 201 is effectively fixed, enabling the first pole piece 201 to be straightened during the subsequent winding of the first pole piece 201, and significantly improving the winding efficiency of the battery cell.

[0087] In addition, the supporting plate 701 in the embodiment of the present application is further provided with the notch 7012, through which the rotatable first clamping roller 80111 and the rotatable second clamping roller 80112 can pass to clamp the first pole piece 201, thereby effectively improving the clamping effect of the rotatable first clamping roller 80111 and the rotatable second clamping roller 80112 on the first pole piece 201, and significantly enhancing the winding stability and reliability of the battery cell.

[0088] Furthermore, since the adsorption holes 7011 of the supporting plate 701 can adsorb the first pole piece 201, through the arrangement of the notch 7012, it is effectively avoided that the tail end of the first pole piece 201 passes through the notch 7012 due to the self - gravity of the first pole piece 201, resulting in the situation that the first pole piece 201 is not supported by the supporting plate 701, further ensuring the winding efficiency of the battery cell.

[0089] In one embodiment, the coiling needle 104 includes a first half - coiling needle 1041 and a second half - coiling needle 1042, and the turret 1 can rotate to make the coiling needle 104 at the blanking station 103; at the blanking station 103, the first half - coiling needle 1041 and the second half - coiling needle 1042 are in a retracted state; during the process of the coiling needle 104 rotating from the blanking station 103 to the winding station 101, the first half - coiling needle 1041 is in an extended state, and the second half - coiling needle 1042 is in a retracted state, so that the first half - coiling needle 1041 straightens the two separators 3.

[0090] Specifically, as Figure 2 and Figure 3As shown in the figure, the turret 1 in the embodiment of the present application includes a winding station 101, a taping station 102, and a blanking station 103. Winding pins 104 are provided on the winding station 101, the taping station 102, and the blanking station 103. The winding pins 104 all have an extended state extending out of the turret 1 and a retracted state retracting into the turret 1.

[0091] Thus, during the process that the fourth driving member drives the turret 1 to revolve to drive the winding pin 104 located at the blanking station 103 to flip to the winding station 101, the first half winding pin 1041 is in the extended state, and the second half winding pin 1042 is in the retracted state, so that the first half winding pin 1041 straightens the two diaphragms 3, effectively ensuring that the diaphragm 3 can be located between the first half winding pin 1041 and the second half winding pin 1042, and significantly improving the winding efficiency of the battery cell.

[0092] According to another embodiment of the present application, a battery cell winding method is provided. Refer to Figures 1 to 6 As shown in the figure, the battery cell winding method includes the following steps:

[0093] A1, driving the winding pin 104 at the winding station 101 to rotate self - to wind the first pole piece 201, the second pole piece 202, and the diaphragm 3;

[0094] A2, driving the turret 1 to rotate so that the winding pin 104 moves from the winding station 101 to the taping station 102;

[0095] A3, driving the first pole piece cutter 601 upstream of the winding station 101 to cut off the first pole piece 201, so that the first pole piece 201 falls downstream of the diaphragm cutter 5;

[0096] A4, driving the diaphragm cutter 5 to cut off the diaphragm 3 between the winding station 101 and the taping station 102;

[0097] A5, driving the winding pin 104 at the taping station 102 to rotate self - to wind the diaphragm 3 and the first pole piece 201, so that the first pole piece 201 is wound on the outer surface of the battery cell.

[0098] Specifically, the pole piece 2 in the battery cell winding method of the embodiment of the present application includes a first pole piece 201 and a second pole piece 202.

[0099] As Figure 1 shown in the figure, in step A1, the fourth driving member drives the turret 1 to revolve to drive the winding pin 104 located at the blanking station 103 to flip to the winding station 101, and the fifth driving member drives the winding pin 104 to rotate self - to wind the diaphragm 3.

[0100] As Figure 3As shown, in step A2, the fourth driving member drives the turret 1 to revolve, so as to drive the winding needle 104 located at the winding station 101 to flip to the glue - sticking station 102.

[0101] As Figure 4 shown, in step A3, the first pole - piece cutter 601 includes a seventh driving member, and the seventh driving member drives the first pole - piece cutter 601 upstream of the winding station 101 to cut off the first pole piece 201, so that the first pole piece 201 falls downstream of the separator cutter 5, to avoid the separator cutter 5 cutting the separator 3 and cutting off the first pole piece 201 again.

[0102] As Figure 6 shown, in step A4, the separator cutter 5 includes an eighth driving member, and the eighth driving member drives the separator cutter 5 to cut off the separator 3 between the winding station 101 and the glue - sticking station 102, so that the length of the separator 3 self - rotated and wound by the winding needle 104 at the glue - sticking station 102 is less than the length of the first pole piece 201 wound.

[0103] In step A5, the fifth driving member drives the winding needle 104 at the glue - sticking station 102 to rotate, so as to realize the winding of the separator 3 and the first pole piece 201, and make the first pole piece 201 wound on the outer surface of the battery cell.

[0104] Thus, since the length of the separator 3 self - rotated and wound by the winding needle 104 at the glue - sticking station 102 is less than the length of the first pole piece 201 wound, after the separator 3 is completely wound on the battery cell by the winding needle 104, the first pole piece 201 has not been completely wound on the battery cell. In this way, after the battery cell winding is completed, the battery cell can be ended by the pole piece 202, effectively improving the safety and service performance of the battery.

[0105] In one embodiment, before the first pole - piece cutter 601 cuts off the first pole piece 201, the battery - cell winding method further includes the following steps:

[0106] B1. The second pole - piece cutter 602 cuts off the second pole piece 202 upstream of the winding station 101.

[0107] Specifically, the separator 3 in the battery - cell winding method of the embodiment of the present application includes a first separator 301 and a second separator 302.

[0108] As Figure 3As shown, the second pole piece cutter 602 includes a ninth driving member. The ninth driving member drives the second pole piece cutter 602 to first cut off the second pole piece 202, and then the fourth driving member drives the turret 1 to revolve to drive the winding needle 104 located at the winding station 101 to reach the glue sticking station 102, so that the winding needle 104 winds the second pole piece 202. Finally, the seventh driving member drives the first pole piece cutter 601 to cut off the first pole piece 201, and the eighth driving member drives the diaphragm cutter 5 to cut off the first diaphragm 301 and the second diaphragm 302, so that the length of the first diaphragm 301 and the second diaphragm 302 wound by the winding needle 104 at the glue sticking station 102 is less than the length of the first pole piece 201 wound.

[0109] Thus, since the second pole piece cutter 602 first cuts off the second pole piece 202, the second pole piece 202 can be wound by the winding needle 104 between the first diaphragm 301 and the second diaphragm 302, so that when the diaphragm cutter 5 cuts off the first diaphragm 301 and the second diaphragm 302 subsequently, the second pole piece 202 will not be cut off, effectively avoiding the situation of short circuit caused by the contact between the first pole piece 201 and the second pole piece 202, and further improving the safety and service performance of the battery.

[0110] In one embodiment, step A3 includes:

[0111] C31, driving the first pole piece cutter 601 upstream of the winding station 101 to cut off the first pole piece 201;

[0112] C32, driving the blowing component 4 to blow the first pole piece 201 onto the material supporting component 7 downstream of the diaphragm cutter 5.

[0113] Specifically, as Figure 4 shown, in step C31, the seventh driving member drives the first pole piece cutter 601 upstream of the winding station 101 to cut off the first pole piece 201, so that the first pole piece 201 falls downstream of the diaphragm cutter 5, to avoid the diaphragm cutter 5 cutting off the first pole piece 201 again when cutting off the diaphragm 3.

[0114] As Figure 5 shown, in step C32, the air joint 402 of the blowing component 4 is communicated with the air blowing groove 4011, and the gas blown out from the air blowing groove 4011 blows the first pole piece 201 onto the material supporting component 7 located downstream of the diaphragm cutter 5.

[0115] Thus, since the first pole piece 201 is blown onto the material supporting component 7 located downstream of the diaphragm cutter 5 by the gas blown out from the air blowing groove 4011, the situation that the first pole piece 201 randomly drops and affects the winding efficiency of the battery core is effectively avoided.

[0116] In one embodiment, step A5 includes:

[0117] D51, driving the rotating needle 104 at the glue - sticking station 102 to rotate self - sufficiently, winding the separator 3 and the first pole piece 201, so that the first pole piece 201 is wound on the outer surface of the battery cell, and driving the deviation - correcting assembly 8 to correct the deviation of the first pole piece 201.

[0118] Specifically, as Figure 6 shown, in step D51, the fifth driving member drives the rotating needle 104 at the glue - sticking station 102 to rotate self - sufficiently to realize the winding of the separator 3 and the first pole piece 201, and makes the first pole piece 201 wound on the outer surface of the battery cell. The second driving member 802 adjusts the position of the first pole piece 201 on the material - supporting assembly 7 along the axial direction of the rotating needle 104 at the glue - sticking station 102 according to the actual position 10 signal of the pole piece sent by the sensor 8012, so that the actual position 10 of the first pole piece 201 coincides with the ideal position 9 of the pole piece.

[0119] Thus, in the present application, by driving the second driving member 802, the deviation of the first pole piece 201 is corrected, effectively improving the winding alignment degree of the battery cell.

[0120] In one embodiment, the deviation - correcting assembly 8 is provided with a rotatable first pinch roller 80111 and a rotatable second pinch roller 80112. The first pinch roller 80111 and the second pinch roller 80112 clamp the first pole piece 201 to correct the deviation of the first pole piece 201. The speed at which the deviation - correcting assembly 8 conveys the first pole piece 201 to the rotating needle 104 is less than the linear speed at which the rotating needle 104 rotates and winds the first pole piece 201 at the glue - sticking station 102.

[0121] Specifically, as Figure 6 shown, in the embodiment of the present application, by setting the third driving member 803 to drive the moving speed of the first pinch roller 80111 and the second pinch roller 80112 close to the rotating needle 104 at the glue - sticking station 102 to be less than the linear rotation speed of the rotating needle 104 at the glue - sticking station 102, the first pole piece 201 is always in a tensioned state, effectively improving the winding efficiency of the battery cell.

[0122] In addition, since the present application is provided with a rotatable first pinch roller 80111 and a rotatable second pinch roller 80112, when the moving speed of the first pinch roller 80111 and the second pinch roller 80112 driven by the third driving member 803 near the needle roller 104 at the glue sticking station 102 is greater than or equal to the linear speed of rotation of the needle roller 104 at the glue sticking station 102, relative movement can occur between the first pole piece 201 and the first pinch roller 80111 and the second pinch roller 80112. Furthermore, the situation where the first pole piece 201 is broken due to inconsistent speeds is effectively avoided, significantly improving the production quality of the battery cell.

[0123] 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. For the sake of brevity of the description, they will not be elaborated here.

[0124] 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 for illustrative purposes only 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 battery cell winding device, characterized in that: include: A turret (1), wherein the turret (1) is provided with a winding needle (104), and the turret (1) can be rotated so that the winding needle (104) is located at a winding station (101) or a gluing station (102); In the conveying direction of the first pole piece (201), a first pole piece cutter (601) is arranged upstream of the winding station (101), and a diaphragm cutter (5) is arranged between the winding station (101) and the glue sticking station (102); The first pole piece cutter (601) is used to cut the first pole piece (201) after the winding needle (104) reaches the glue laminating station (102), and the diaphragm cutter (5) is used to cut the diaphragm (3) after the first pole piece cutter (601) cuts the first pole piece (201), so that the length of the diaphragm (3) wound by the winding needle (104) at the glue laminating station (102) is less than the length of the first pole piece (201) wound.

2. The battery core winding device according to claim 1, characterized in that: A second pole piece cutter (602) is also provided upstream of the winding station (101), and before the first pole piece cutter (601) cuts the first pole piece (201), the second pole piece cutter (602) cuts the second pole piece (202).

3. The battery core winding device according to claim 1, characterized in that: It also comprises a blowing assembly (4) and a supporting assembly (7); after the first pole piece cutter (601) cuts off the first pole piece (201), the blowing assembly (4) can blow the first pole piece (201) to the supporting assembly (7); The support component (7) is located downstream of the diaphragm cutter (5), and after the blowing component (4) blows the first pole piece (201) to the support component (7), the diaphragm cutter (5) cuts off the diaphragm (3).

4. The battery core winding device according to claim 3, characterized in that: The blowing assembly (4) comprises a blowing roller (401) and an air joint (402); the blowing roller (401) is provided with a blowing groove (4011), the blowing groove (4011) is arranged along the axial direction of the blowing roller (401), and the air joint (402) is connected to the blowing groove (4011).

5. The battery core winding device according to claim 3, characterized in that: The support assembly (7) comprises a support plate (701) and a first driving member (702), wherein the support plate (701) comprises an adsorption hole (7011), and the adsorption hole (7011) is used to adsorb the first pole piece (201); the first driving member (702) is used to drive the support plate (701) to approach or move away from the winding needle (104) at the gluing station (102).

6. The battery cell winding device according to claim 3, characterized in that: The invention also comprises a deviation correction component (8), wherein the deviation correction component (8) comprises a clamping jaw (801) and a second driving member (802), wherein the clamping jaw (801) is provided with a sensor (8012), and the clamping jaw (801) is capable of clamping a first pole piece (201) on the material supporting component (7), wherein the sensor (8012) is used for detecting the position of the first pole piece (201) on the material supporting component (7), and the second driving member (802) is used for adjusting the position of the first pole piece (201) on the material supporting component (7) along the axial direction of the winding needle (104) at the gluing station (102) according to the position signal of the first pole piece (201) sent by the sensor (8012).

7. The battery cell winding device according to claim 6, characterized in that: The clamping jaw (801) is provided with a rotatable first clamping roller (80111) and a rotatable second clamping roller (80112); the clamping jaw (801) can be moved so that the first clamping roller (80111) and the second clamping roller (80112) clamp the first pole piece (201) on the support assembly (7).

8. The battery cell winding device according to claim 7, characterized in that: The deviation-correcting assembly (8) further comprises a third driving member (803), wherein the third driving member (803) is connected to the second driving member (802); The third driving member (803) is used to drive the first clamping roller (80111) and the second clamping roller (80112) to approach or move away from the winding needle (104) at the gluing station, and the movement speed of the first clamping roller (80111) and the second clamping roller (80112) to approach the winding needle (104) at the gluing station (102) by the third driving member (803) is less than the rotational linear speed of the winding needle (104) at the gluing station (102).

9. The battery core winding device according to claim 6, characterized in that: The support assembly (7) comprises a support plate (701) and a first driving member (702); the support plate (701) comprises an adsorption hole (7011), and the adsorption hole (7011) is used to adsorb the first pole piece (201); the first driving member (702) is used to drive the support plate (701) to approach or move away from the winding needle (104) at the gluing station (102); The support plate (701) further comprises a notch (7012), and the clamping jaw (801) is capable of adjusting the position of the first pole piece (201) on the support assembly (7) along the axial direction of the winding needle (104) at the glue laminating station (102) at the notch (7012).

10. The battery core winding device according to claim 1, characterized in that: The winding needle (104) comprises a first half winding needle (1041) and a second half winding needle (1042), and the turret (1) is capable of rotating so that the winding needle (104) is located at a material unloading station (103); At the blanking station (103), the first half-rolled needle (1041) and the second half-rolled needle (1042) are in a retracted state; During the process of the winding needle (104) rotating from the unloading station (103) to the winding station (101), the first half winding needle (1041) is in an extended state and the second half winding needle (1042) is in a retracted state, so that the first half winding needle (1041) straightens the two diaphragms.

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