CN213813311U

CN213813311U - Auxiliary tool for manufacturing pole piece stripping force test sample

Info

Publication number: CN213813311U
Application number: CN202023106474.4U
Authority: CN
Inventors: 李少刚; 李洪涛; 刘启凯; 柯克; 郝世伟; 王红伟
Original assignee: Henan Keneng New Energy Technology Co ltd
Current assignee: Henan Keneng New Energy Technology Co ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-07-27
Anticipated expiration: 2030-12-22

Abstract

The utility model discloses an auxiliary fixtures for preparation of pole piece peeling force test sample, including a supporting bench, the rolling mechanism who is used for pasting the flat board of pole piece and is used for the roll extrusion pole piece, the pole piece is pasted at dull and stereotyped top, and rolling mechanism rolls and installs on a supporting bench, and the flat board is placed and is located between rolling mechanism and the supporting bench on a supporting bench, and dull and stereotyped bottom and a supporting bench laminating, rolling mechanism and pole piece contact, rolling mechanism reciprocating motion on a supporting bench rolls the pole piece. The auxiliary tool further comprises a driving mechanism used for driving the rolling mechanism to move, the rolling mechanism comprises a rolling wheel and a middle shaft, the rolling wheel is fixedly connected to the middle shaft, and the middle shaft is connected with the driving mechanism. The weight of the rolling wheel is a fixed value, the rolling wheel rolls the pole piece by means of dead weight, and the rolling force borne by the pole piece is a constant value. The problem of among the prior art personnel can't hold pressure size when the operation and lead to the stripping force test result difference that same pole piece obtained when testing is very big is solved.

Description

Auxiliary tool for manufacturing pole piece stripping force test sample

Technical Field

The utility model belongs to the technical field of lithium ion battery, concretely relates to an auxiliary fixtures that is used for pole piece peeling strength test sample preparation.

Background

Compared with the traditional power supply, the lithium ion battery has the advantages of high open-circuit voltage, high specific energy, long service life, low self-discharge rate, no memory effect, small environmental pollution and the like, becomes the most promising and competitive secondary battery at present, and rapidly permeates into various fields in national economy at present.

Coating and rolling are the two most critical processes for manufacturing lithium ion batteries. The coating and rolling processes affect the capacity exertion, impedance magnitude, rate capability of the battery and ultimately the cycle life of the battery. If the pole piece has poor cohesiveness, active substances on the surface of the pole piece of the battery can fall off, so that the short circuit rate of the battery is increased, the self-discharge performance of the battery is deteriorated, and safety accidents can be caused seriously. Therefore, the work of detecting the bonding force of the pole piece after coating and rolling is particularly important.

The Chinese patent with application number 201410734582.6 discloses a method for measuring the adhesive force between foil and powder under the condition of high surface density coating of a positive plate, which comprises the steps of firstly preparing slurry and foil into a battery positive plate according to the conventional battery positive electrode production process, rolling the positive plate and cutting the positive plate into strips with the width of 15-30 mm; clamping the strip-shaped positive plate at two ends of a tensile machine, then stretching the strip-shaped positive plate at a constant speed until new fracture of the powder is not generated, and stopping stretching. The binding power is obtained through a certain calculation formula.

The Chinese patent with application number 201911371611.6 discloses a method for measuring the adhesive force between powder materials of a battery pole piece. According to the measuring method, the lithium ion battery slurry is prepared firstly, then the lithium ion battery slurry is shaped to obtain a pure powder film, tension is directly applied to the pure powder film, the tension value when the pure powder film is broken is read, and the magnitude of the tension can represent the magnitude of the cohesive force of the pure powder film.

GB2792-81 pressure-sensitive adhesive tape 180 ℃ peel strength determination method stipulates a method for measuring the force required to separate a pressure-sensitive adhesive tape from an adherend by a peeling method.

In summary, the published patent and GB2792-81 provide methods for peel force testing, but the preparation and requirements for peel force test specimens are not detailed. During actual test, the peeling force test results obtained by the same pole piece are greatly different and can be different by 20 times, and the rolling pressure is inconsistent after the peeling force sample is prepared, so that a person cannot master the pressure during operation.

SUMMERY OF THE UTILITY MODEL

To the not enough of existence among the prior art, the utility model aims to provide a simple structure, convenient to use's an auxiliary fixtures that is used for pole piece peeling force test sample preparation.

In order to achieve the above purpose, the technical scheme of the utility model is that: the utility model provides an auxiliary fixtures that is used for pole piece peel force test sample preparation which characterized in that: the pole piece rolling mechanism is mounted on the supporting platform in a rolling mode, the flat plate is placed between the rolling mechanism and the supporting platform on the supporting platform, the bottom of the flat plate is attached to the supporting platform, the rolling mechanism is in contact with the pole piece, and the rolling mechanism performs reciprocating motion on the supporting platform to roll the pole piece.

Furthermore, the auxiliary tool further comprises a driving mechanism for driving the rolling mechanism to move, the rolling mechanism comprises a rolling wheel and a middle shaft, the rolling wheel is fixedly connected to the middle shaft, and the middle shaft is connected with the driving mechanism.

Furthermore, the auxiliary tool further comprises supports symmetrically connected to two sides of the supporting table, the driving mechanism is connected to the supports, and the driving mechanism drives the rolling mechanism to move back and forth between the supports on the two sides of the supporting table.

Furthermore, the driving mechanism comprises a pulley and a traction rope, the pulley is connected to the support, the traction rope is connected with a middle shaft of the rolling mechanism, and the other end of the traction rope bypasses the pulley to serve as a force application end.

Furthermore, the driving mechanism further comprises pull rings for applying force to the traction rope, the pull rings are connected to one end, far away from the rolling mechanism, of the traction rope, and pull rings on two sides are pulled to move back and forth on the pole pieces through pulley driving rollers on two sides.

Furthermore, the weight of the rolling wheel is a fixed value, the rolling wheel rolls the pole piece by means of self weight, and the rolling force borne by the pole piece is a constant value.

Adopt the utility model discloses technical scheme's advantage does:

1. the utility model discloses a pulley and haulage rope come the drive roller to carry out the roll extrusion to the pole piece, and the use of pulley and haulage rope can avoid exerting on the pole piece at the roll extrusion in-process other external power, guarantees only the gravity of roller wheel at the roll extrusion in-process, and pressure is unanimous when guaranteeing pole piece peel force test sample preparation, has solved the very big problem of peel force test result difference that the same pole piece reachs when personnel can't hold pressure size when the operation among the prior art leads to the test.

2. The utility model discloses an auxiliary fixtures structural design is compact reasonable, and convenience simple to use can stop personnel because the test result deviation that the uncontrollable roll extrusion pressure leads to when actual operation.

Drawings

The invention will be described in further detail with reference to the following drawings and detailed description:

fig. 1 is the structure schematic diagram of the auxiliary tool of the utility model.

The labels in the above figures are respectively: 1. a support table; 2. pole pieces; 3. a support; 4. a pulley; 5. a rolling mechanism; 51. a rolling wheel; 52. a middle shaft; 6. a hauling rope; 7. and (4) a pull ring.

Detailed Description

In the present invention, it is to be understood that the term "length"; "Width"; "Up"; "Down"; "front"; "Back"; "left"; "Right"; "vertical"; "horizontal"; "Top"; "bottom" "inner"; "outer"; "clockwise"; "counterclockwise"; "axial"; "planar direction"; the directional or positional relationship indicated as "circumferential" or the like is based on the directional or positional relationship shown in the drawings, and is only for convenience of description and simplified description, and does not indicate or imply that the device or element referred to must have a particular orientation; constructed and operative in a particular orientation and therefore should not be construed as limiting the invention.

As shown in fig. 1, an auxiliary tool for manufacturing a pole piece peeling force test sample comprises a supporting table 1, a flat plate 8 used for adhering a pole piece 2 and a rolling mechanism 5 used for rolling the pole piece, wherein the pole piece is adhered to the top of the flat plate 8, the rolling mechanism 5 is installed on the supporting table 1 in a rolling manner, the flat plate 8 is placed on the supporting table 1 and located between the rolling mechanism 5 and the supporting table 1, the bottom of the flat plate 8 is adhered to the supporting table 1, the rolling mechanism 5 is in contact with the pole piece 2, and the rolling mechanism 5 moves back and forth on the supporting table 1 to roll the pole piece 2.

The auxiliary tool further comprises a driving mechanism for driving the rolling mechanism 5 to move, the rolling mechanism 5 comprises a rolling wheel 51 and a middle shaft 52, the rolling wheel 51 is fixedly connected to the middle shaft 52, and the middle shaft 52 is connected with the driving mechanism. The weight of the rolling wheel 51 is a fixed value, the rolling wheel 51 rolls the pole piece 2 by self weight, and the rolling force borne by the pole piece 2 is a constant value. The specific weight of the roller 51 can be adjusted according to the actual requirements of the enterprise.

The auxiliary tool further comprises supports 3, the supports 3 are symmetrically connected to two sides of the supporting table 1, the driving mechanism is connected to the supports 3, and the driving mechanism drives the rolling mechanism 5 to move back and forth between the supports 3 on the two sides of the supporting table 1.

The driving mechanism comprises a pulley 4 and a traction rope 6, the pulley 4 is connected to the support 3, the traction rope 6 is connected with a middle shaft 52 of the rolling mechanism 5, and the other end of the traction rope 6 rounds the pulley 4 to serve as a force application end. The driving mechanism further comprises pull rings 7 for applying force to the traction ropes 6, the pull rings 7 are connected to one ends, far away from the rolling mechanism 5, of the traction ropes 6, and the pull rings 7 on the two sides are pulled to drive the roller wheels 51 to move back and forth on the pole pieces 2 through the pulleys 4 on the two sides.

When rolling pole pieces, the pole pieces 2 to be rolled are placed between the support table 1 and the rolling device 5, testers pull the pull rings 7 on the two sides to drive the rolling device 5 to reciprocate for a certain number of times on the pole pieces 2 to be rolled through the pulleys 4 on the two sides, and the rolling number can be determined by enterprises according to self conditions. Preferably, the dead weight of the rolling wheel 51 is 1-2 kg, the rolling frequency of the rolling wheel 51 on the rolled pole piece sample is 2-3 times, and the dead weight and the rolling frequency of the rolling wheel can be adjusted according to actual requirements. However, the dead weight of the roller wheel cannot be too heavy, the rolling frequency cannot be too many, otherwise, when the pole piece peeling force test is carried out, the double-sided adhesive and the pole piece are bonded too firmly, the pole piece and the double-sided adhesive are peeled off simultaneously, and the test result has serious deviation because the peeling force of the pole piece is not the sticking force of the double-sided adhesive.

In order to prevent the flat plate 8 with the pole piece from moving at the position of the support table 1 during rolling, a clamping groove for limiting the flat plate 8 is arranged on the support table 1, and the flat plate 8 with the pole piece is placed in the clamping groove. Also can be equipped with the locating hole that is used for fixing a position dull and stereotyped 8 on brace table 1, paste dull and stereotyped 8 of pole piece and place on brace table 1, the locating hole is located dull and stereotyped 8 all around, and the locating pin is pegged graft and is fixed a position dull and stereotyped 8 at the locating hole.

The utility model discloses a pulley and haulage rope come drive roller wheel 51 to carry out the roll extrusion to pole piece 2, and the use of pulley and haulage rope can avoid exerting on the pole piece at the roll extrusion in-process external other power, guarantees only roller wheel 51's gravity at the roll extrusion in-process, and the pressure is unanimous when guaranteeing that pole piece peeling force test sample preparation, has solved the very big problem of peeling force test result difference that personnel can't hold the pressure size when the operation and result in the test the same pole piece to reachd.

The utility model discloses an auxiliary fixtures structural design is compact reasonable, and convenience simple to use can stop personnel because the test result deviation that the uncontrollable roll extrusion pressure leads to when actual operation.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without the technical solutions of the present invention, or the present invention can be directly applied to other occasions without the improvements, and all are within the protection scope of the present invention.

Claims

1. The utility model provides an auxiliary fixtures that is used for pole piece peel force test sample preparation which characterized in that: including brace table (1), dull and stereotyped (8) that are used for pasting pole piece (2) and rolling mechanism (5) that are used for rolling pole piece, the pole piece is pasted at the top of dull and stereotyped (8), and rolling mechanism (5) roll installation is on brace table (1), and dull and stereotyped (8) are placed and are located between rolling mechanism (5) and brace table (1) on brace table (1), and the bottom and brace table (1) laminating of dull and stereotyped (8), rolling mechanism (5) and pole piece (2) contact, and rolling mechanism (5) round trip motion rolls pole piece (2) on brace table (1).

2. The auxiliary tool for manufacturing the pole piece peeling force test sample as claimed in claim 1, wherein: the auxiliary tool further comprises a driving mechanism used for driving the rolling mechanism (5) to move, the rolling mechanism (5) comprises a rolling wheel (51) and a middle shaft (52), the rolling wheel (51) is fixedly connected to the middle shaft (52), and the middle shaft (52) is connected with the driving mechanism.

3. The auxiliary tool for manufacturing the pole piece peeling force test sample as claimed in claim 2, wherein: the auxiliary tool further comprises supports (3), the supports (3) are symmetrically connected to the two sides of the supporting table (1), the driving mechanism is connected to the supports (3), and the driving mechanism drives the rolling mechanism (5) to move back and forth between the supports (3) on the two sides of the supporting table (1).

4. The auxiliary tool for manufacturing the pole piece peeling force test sample as claimed in claim 3, wherein: the driving mechanism comprises a pulley (4) and a traction rope (6), the pulley (4) is connected to the support (3), the traction rope (6) is connected with a middle shaft (52) of the rolling mechanism (5), and the other end of the traction rope (6) bypasses the pulley (4) to serve as a force application end.

5. The auxiliary tool for manufacturing the pole piece peeling force test sample as claimed in claim 4, wherein: the driving mechanism further comprises a pull ring (7) used for applying force to the traction rope (6), the pull ring (7) is connected to one end, far away from the rolling mechanism (5), of the traction rope (6), and the pull rings (7) on two sides are pulled to move back and forth on the pole piece (2) through pulleys (4) on two sides and a driving roller (51).

6. The auxiliary tool for manufacturing the pole piece peeling force test sample as claimed in any one of claims 2 to 5, wherein: the weight of the rolling wheel (51) is a fixed value, the rolling wheel (51) rolls the pole piece (2) by means of self weight, and the rolling force borne by the pole piece (2) is a constant value.

7. The auxiliary tool for manufacturing the pole piece peeling force test sample as claimed in claim 6, wherein: the supporting table (1) is provided with a clamping groove used for limiting the flat plate (8), and the flat plate with the pasted pole piece is placed in the clamping groove.

8. The auxiliary tool for manufacturing the pole piece peeling force test sample as claimed in claim 6, wherein: the supporting table (1) is provided with a positioning hole for positioning the flat plate (8), the flat plate with the adhered pole piece is placed on the supporting table (1), the positioning hole is located on the periphery of the flat plate, and the positioning pin is inserted into the positioning hole to position the flat plate.