CN216120434U

CN216120434U - Device for preventing winding battery cell from drifting

Info

Publication number: CN216120434U
Application number: CN202122682265.2U
Authority: CN
Inventors: 王彦东
Original assignee: Time Faw Power Battery Co ltd
Current assignee: Time Faw Power Battery Co ltd
Priority date: 2021-11-04
Filing date: 2021-11-04
Publication date: 2022-03-22
Anticipated expiration: 2031-11-04

Abstract

The utility model provides a device for preventing a winding battery cell from drifting, relates to the field of lithium battery cell production, and solves the problem that in the prior art, when a battery cell is wound, a pole piece is unsupported after being cut off, and the pole piece swings greatly when a winding needle is wound and pulled, so that the OH at the tail part of the battery cell exceeds the specification. This technical scheme is including guiding bearing structure, and guiding bearing structure is located the discharge gate below of the pole piece cutter of electric core winder, and guiding bearing structure is used for playing support and guide effect to the pole piece after the cutting. The utility model solves the problem of free falling state of the pole piece cut at the winding ending part, supports and guides the pole piece through the guide support structure, and prevents the pole piece from falling and greatly fluctuating after being cut off to cause OH over-gauge at the tail part of the battery cell.

Description

Device for preventing winding battery cell from drifting

Technical Field

The utility model relates to the field of lithium battery cell production, in particular to a device for preventing a winding cell from drifting.

Background

A lithium ion battery is a secondary battery (rechargeable battery) that mainly operates by movement of lithium ions between a positive electrode and a negative electrode. During charging and discharging, Li + is inserted and extracted back and forth between two electrodes: during charging, Li + is extracted from the positive electrode and is inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge.

The battery core is the most core part in the lithium ion battery, and the diaphragm, the anode sheet and the cathode sheet are coiled into a coil core through a coiling machine when the battery core is produced. If figure 1, after the coiling is accomplished, need cut off, avoid interfering in order to guarantee to cut off, need improve the position of cutting off by 200mm, cut off back pole piece 1 and do not have the support, this part does not have the support pole piece and can freely fall to the mechanism support position of rectifying, it is big that back pole piece 1 swings after the coiling of book needle 2 is dragged, leads to the condition that electric core afterbody OH surpasses the rule.

SUMMERY OF THE UTILITY MODEL

The utility model provides a device for preventing the tail swing of a wound battery cell, which solves the defect that the OH at the tail part of the battery cell is over-specified due to the fact that a pole piece is unsupported after the pole piece is cut off when the battery cell is wound in the prior art and the pole piece swings greatly when a winding needle is wound and pulled.

The technical scheme of the utility model is realized as follows:

the utility model provides a device for preventing coiling electricity core drift, is including guide bearing structure, and guide bearing structure is located the discharge gate below of the pole piece cutter of electricity core winder, and guide bearing structure is used for playing support and guide effect to the pole piece after the cutting.

As a first preferred technical solution, the guiding and supporting structure includes a rotating support plate with a length greater than a width, and the rotating support plate is connected to a rotating driving device for driving the rotating support plate to rotate.

Further, the rotation driving device is a servo motor.

As a first preferred technical solution, the guiding and supporting structure includes a telescopic plate, and the telescopic plate is connected with a telescopic driving device for driving the telescopic plate to extend and contract.

Further, the expansion plate comprises a plurality of stages of sleeve plates which are sleeved together, the last stage of the expansion plate is connected with the expansion driving device through a connecting rod, and the expansion driving device is an air cylinder, a hydraulic cylinder or an electric cylinder.

As a third preferred technical solution, the guiding and supporting structure includes a winding tape and a winding housing, a winding shaft is disposed in the middle of the winding housing, the winding tape is wound on the winding shaft in the winding housing, and the winding shaft is connected to a winding driving device for driving the winding shaft to rotate.

Further, the winding driving device is a servo motor.

Further, the cross section of the tape collecting tape is arc-shaped.

Further, the winding machine also comprises a pole piece cutter for cutting off the pole piece, a winding needle for winding and a plurality of deviation correction rollers, wherein the deviation correction rollers are positioned between the pole piece cutter and the winding needle.

Further, the pole piece cutter is used for cutting off the cathode piece or the anode piece.

The utility model has the beneficial effects that: the problem of the pole piece free fall state that the coiling ending department cut off is solved, support and guide the pole piece through guide bearing structure, prevent that the pole piece from dropping after cutting off and fluctuate by a wide margin, lead to electric core afterbody OH surpass rule.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic structural view of embodiment 1;

FIG. 3 is a schematic view of the structure of the guide support structure in embodiment 1;

FIG. 4 is a schematic structural view of embodiment 2;

FIG. 5 is a schematic view of the structure of a guide support structure in embodiment 2;

FIG. 6 is a schematic structural view of embodiment 3;

FIG. 7 is a schematic structural view of a guide support structure in example 3;

fig. 8 is a left side view of fig. 7.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 2-3, the device for preventing the tail flicking of the winding battery cell comprises a guide support structure, wherein the guide support structure is positioned below a discharge port of a pole piece cutter 3 of the battery cell winding machine and is used for supporting and guiding a cut pole piece 1.

As a first preferred technical solution, the guiding and supporting structure comprises a rotating support plate 4 with a length larger than a width, and the rotating support plate 4 is in transmission connection with a rotating driving device 41 for driving the rotating support plate 4 to rotate.

Further, the rotation driving device 41 is a servo motor.

Further, the winding machine comprises a pole piece cutter 3 for cutting off the pole piece 1, a winding needle 2 for winding and a plurality of deviation correction rollers 5, wherein the deviation correction rollers 5 are positioned between the pole piece cutter 3 and the winding needle 2.

Further, the pole piece cutter 3 is used for cutting off the cathode piece or the anode piece.

In a normal state, the rotary support plate 4 is not placed transversely, so that interference in winding is prevented, when the pole piece 1 is to be cut off, the rotary drive device 41 drives the rotary support plate 4 to rotate for 90 degrees, the cut-off pole piece 1 is supported and guided, and the phenomenon that the pole piece 1 drops after being cut off and fluctuates greatly to cause the OH tail of the battery cell to exceed the specification is prevented.

Example 2

Referring to fig. 4 to 5, the present embodiment is different from embodiment 1 in that: the guide bearing structure is different, and the guide bearing structure of this embodiment includes telescopic expansion plate 6, and the transmission of expansion plate 6 is connected with the flexible drive arrangement 61 that drives expansion plate 6 and stretch out and contract.

Further, the expansion plate 6 comprises a plurality of stages of sleeve plates which are sleeved together, the last stage of the expansion plate 6 is connected with the expansion driving device 61 through a connecting rod, and the expansion driving device 61 is an air cylinder, a hydraulic cylinder or an electric cylinder.

In a normal state, the retractable plate 6 is in a retracted state to prevent interference with winding, when the pole piece 1 is to be cut off, the retractable driving device 61 drives the retractable plate 6 to stretch out and elongate, so as to support and guide the cut-off pole piece 1 and prevent the pole piece 1 from dropping and greatly fluctuating after being cut off, thereby preventing the OH at the tail of the battery cell from exceeding the specification.

Example 3

Referring to fig. 6 to 8, the present embodiment is different from embodiment 1 in that: the guiding and supporting structure is different, the guiding and supporting structure of the embodiment includes a winding tape 71 and a winding shell 72, a winding shaft is arranged in the middle of the winding shell 72, the winding tape 71 is wound on the winding shaft in the winding shell 72, and the winding shaft is in transmission connection with a winding driving device 73 which drives the winding shaft to rotate. The working principle and the structure are similar to those of ordinary tape measures, the tape measures are straight when being pulled out and are bent when being rolled in, and the rolling ruler 71 can be made of mylar sheets or other materials.

Further, the winding driving device 73 is a servo motor.

Further, the cross section of the tape winding 71 is arc-shaped, so that the drawn tape winding is not easy to bend.

In a normal state, the winding ruler 71 is wound in the winding shell 72 to prevent interference with winding, when the pole piece 1 is to be cut off, the winding driving device 73 drives the winding ruler 71 to extend out, the winding ruler 71 is straight after extending out to support and guide the cut-off pole piece 1, and the phenomenon that the pole piece 1 drops after being cut off and fluctuates greatly to cause the OH over-gauge at the tail of the battery cell is prevented.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a device for preventing winding electricity core drift which characterized in that: the guide support structure is located below a discharge port of a pole piece cutter of the electric core winding machine and used for supporting and guiding the cut pole piece.

2. The device for preventing the tail flick of the winding cell of claim 1, wherein: the guide supporting structure comprises a rotary supporting plate with the length larger than the width, and the rotary supporting plate is in transmission connection with a rotary driving device driving the rotary supporting plate to rotate.

3. The device for preventing the tail flick of the winding cell of claim 2, wherein: the rotary driving device is a servo motor.

4. The device for preventing the tail flick of the winding cell of claim 1, wherein: the guide supporting structure comprises a telescopic expansion plate, and the expansion plate is in transmission connection with a telescopic driving device which drives the expansion plate to stretch out and contract.

5. The device for preventing the tail flick of the winding cell of claim 4, wherein: the telescopic plate comprises a plurality of stages of sleeve plates which are sleeved together, the last stage of the telescopic plate is connected with the telescopic driving device through a connecting rod, and the telescopic driving device is an air cylinder, a hydraulic cylinder or an electric cylinder.

6. The device for preventing the tail flick of the winding cell of claim 1, wherein: the guiding and supporting structure comprises a winding tape and a winding shell, a winding shaft is arranged in the middle of the winding shell, the winding tape is wound on the winding shaft in the winding shell, and the winding shaft is in transmission connection with a winding driving device which drives the winding shaft to rotate.

7. The device for preventing the tail flick of the winding cell of claim 6, wherein: the winding driving device is a servo motor.

8. The device for preventing the tail flick of the winding cell of claim 6, wherein: the cross section of the tape collecting tape is arc-shaped.

9. The device for preventing tail flicking of a wound cell of any one of claims 1 to 8, wherein: the winding machine further comprises a pole piece cutter for cutting off the pole piece, a winding needle for winding and a plurality of deviation correction rollers, wherein the deviation correction rollers are located between the pole piece cutter and the winding needle.

10. The apparatus for preventing tail flicking of a wound cell of claim 9, wherein: the pole piece cutter is used for cutting off the cathode piece or the anode piece.