CN218917239U

CN218917239U - Diaphragm inspection device for lithium ion battery

Info

Publication number: CN218917239U
Application number: CN202320148188.9U
Authority: CN
Inventors: 王克飞; 黄磊; 王艳飞; 张妍; 郭大利; 周朕良; 刘玉涛; 刘通; 曲鹏利; 李佳
Original assignee: Shandong Juxin New Energy Technology Co ltd
Current assignee: Shandong Juxin New Energy Technology Co ltd
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2023-04-25
Anticipated expiration: 2033-01-31

Abstract

A diaphragm inspection device for a lithium ion battery relates to the technical field of diaphragm inspection, and the technical scheme is as follows: the measuring device comprises a winding and unwinding assembly and a measuring assembly, wherein the winding and unwinding assembly comprises an unwinding mechanism and a winding mechanism, a diaphragm with a measuring radian is wound on the unwinding mechanism and the winding mechanism together, the measuring assembly comprises two connecting rods, a measuring standard line is connected between the two connecting rods, and the measuring standard line extends along the moving direction of the diaphragm. The beneficial effects of this technical scheme are: through the cooperation of winding mechanism and measurement subassembly, detect the diaphragm outward appearance under the prerequisite of not damaging the diaphragm, can monitor and measure the diaphragm radian under the outward appearance of different specification diaphragms and the different tension effect simultaneously, the verification of diaphragm usability of being convenient for.

Description

Diaphragm inspection device for lithium ion battery

Technical Field

The utility model relates to the technical field of diaphragm inspection, in particular to a diaphragm inspection device for a lithium ion battery.

Background

The separator is an important component in the lithium ion battery, and is mainly used for blocking the physical aspects of positive and negative electrode materials and conducting ions, wherein the physical aspects of blocking relate to the safety of the battery, and the separator is a very critical ring for the lithium battery, so that the appearance and radian aspects of the separator need to be monitored and confirmed before the separator is used.

Certain radian phenomenon can appear in the diaphragm actual production cutting process, and the size of diaphragm radian decides the cladding of anodal, negative pole piece, and in lithium cell actual production process, the diaphragm can receive certain tension effect, and the radian that produces in the diaphragm manufacturing process can change because of the tension effect in the battery production, and then influences cladding between the anodal pole piece, and serious person can lead to incident such as battery fire.

When the diaphragm is detected, the diaphragm is thinner, and only has the thickness of a few micrometers to tens of micrometers, so that the diaphragm can be abnormal or damaged in appearance due to the action of an accidental external force in the actual detection operation, the judgment result is affected, the diaphragm is wrinkled, enough tension is not generated, and the detection can generate deviation, so that the radian of the diaphragm is required to be monitored and measured under the condition of a certain tension.

Disclosure of Invention

The utility model aims to overcome the defect that the current diaphragm radian detection is accurate and the detection can generate deviation, and provides a diaphragm detection device for a lithium ion battery.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a diaphragm verifying attachment for lithium ion battery, includes receive and releases the subassembly and measures the subassembly, receive and releases the subassembly and including unreeling mechanism and winding mechanism, unreels the diaphragm that has the measurement radian on mechanism and the winding mechanism jointly, measures the subassembly and includes two connecting rods, is connected with between two connecting rods and measures the standard line, and the direction that the measurement standard line removed along the diaphragm extends, and the lower surface of measurement standard line contacts with the upper surface of diaphragm.

The diaphragm appearance detection can be carried out on the premise of not damaging the diaphragm by measuring the standard line to calibrate the diaphragm radian measurement standard line, the diaphragm is compared with the standard line, the radian condition of the diaphragm in different stress states can be simulated, the verification of the usability of the diaphragm is facilitated, the setting of winding and unwinding tension is carried out through the cooperation between the unwinding mechanism and the winding mechanism, the radian state of the diaphragm in different tension conditions is simulated, and the measurement accuracy is ensured.

Preferably, the device also comprises two cases, wherein the case is internally provided with a cylinder, and the connecting rod is connected to a piston rod of the cylinder.

The connecting rod controls the measuring standard line to move up and down, and adjusts according to the position of the diaphragm.

Preferably, the unreeling mechanism and the reeling mechanism are of an inflatable shaft structure.

The unreeling mechanism and the reeling mechanism can set reeling and unreeling tension, and the size of the shaft diameter is controlled by charging and unreeling compressed air, so that the reeling and unreeling mechanism is suitable for diaphragms with multiple specifications of shaft diameter sizes and has high universality.

Preferably, the device further comprises two groups of LED lamps for inspecting the appearance defects of the diaphragm, wherein one group of LED lamps is arranged above the diaphragm, and the other group of LED lamps is arranged below the diaphragm.

Preferably, the winding and unwinding assembly further comprises two conveying rollers, the two conveying rollers are respectively located at two ends of the measuring standard line, the distance between the two conveying rollers is larger than the length of the measuring standard line, the diaphragm is in contact with the two conveying rollers, and the diaphragm located between the two conveying rollers is parallel to the measuring standard line.

The two conveying rollers are of horizontal structures, and stable conveying of the diaphragm in a parallel state can be ensured.

Preferably, the two transfer rolls are smooth-surfaced carbon fiber rolls.

The conveying roller is made of carbon fiber and has a smooth surface, so that the appearance damage of the diaphragm can be avoided.

Compared with the prior art, the utility model has the beneficial effects that: through the cooperation of winding mechanism and measurement subassembly, detect the diaphragm outward appearance under the prerequisite of not damaging the diaphragm, can monitor and measure the diaphragm radian under the outward appearance of different specification diaphragms and the different tension effect simultaneously, the verification of diaphragm usability of being convenient for.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

Fig. 2 is a schematic structural diagram of a chassis according to an embodiment of the present utility model.

In the figure: 1 unreeling mechanism, 2 conveying roller, 3LED lamp, 4 machine case, 5 winding mechanism, 6 diaphragm, 7 measurement guideline, 8 connecting rod.

Detailed Description

In order to make the objects, features and advantages of the present utility model more obvious and understandable, the technical solutions of the present utility model will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the utility model are intended to be within the scope of the patent protection.

Referring to fig. 1-2, a diaphragm inspection device for lithium ion batteries comprises a winding and unwinding assembly and a measuring assembly, wherein the winding and unwinding assembly comprises an unwinding mechanism 1 and a winding mechanism 5, a diaphragm 6 for measuring radian is wound on the unwinding mechanism 1 and the winding mechanism 5 together, the unwinding mechanism 1 and the winding mechanism 5 are of inflatable shaft structures and can set winding and unwinding tension, the winding mechanism 1 and the winding mechanism 5 are controlled to set test speed and test tension and control test start and close through a control system, the diaphragm radian states under different tension conditions are simulated, two cases 4 are also included, an air cylinder is installed in the cases 4, a connecting rod 8 is connected to a piston rod of the air cylinder, the position of the connecting rod 8 is controlled through the air cylinder, the connecting rod 8 controls the up and down movement of a measuring standard line 7, the high and low movement of the measuring standard line 7 is controlled, the diaphragm 6 is adjusted according to the position of the diaphragm 6, the measuring assembly comprises two connecting rods 8, a measuring standard line 7 is connected between the two connecting rods 8, the measuring standard line 7 extends along the moving direction of the diaphragm 6, the lower surface of the measuring standard line 7 is abutted against the upper surface of the diaphragm 6 to calibrate the measuring standard line of the diaphragm 6, the color of the diaphragm 6 is different from that of the measuring standard line 7, the diaphragm 6 is white, the measuring standard line 7 is black, the radian of the diaphragm 6 is convenient to check, the appearance of the diaphragm can be realized on the premise of not damaging the diaphragm, meanwhile, the radian condition of the diaphragm in different stress states can be simulated, the collecting assembly also comprises two conveying rollers 2 for conveying the diaphragm 6, the two conveying rollers 2 are respectively positioned at two ends of the measuring standard line, the distance between the two conveying rollers 2 is larger than the length of the measuring standard line 7, the diaphragm 6 is contacted with the conveying rollers 2, the diaphragm 6 positioned between the two conveying rollers 2 is parallel to the measuring standard line 7, the two conveying rollers 2 are carbon fiber rollers with smooth surfaces, the distance between the two conveying rollers 2 is larger than the length of the measuring standard line 7, the two conveying rollers 2 are of a horizontal structure, one can avoid the appearance damage of a diaphragm, the other can ensure the stable conveying of the diaphragm in a parallel state, and the two conveying rollers 2 enable the diaphragm 6 positioned below the measuring standard line 7 to be arranged horizontally, so that the inspection quality is ensured.

Referring to fig. 1-2, two sets of LED lamps 3 for inspecting the appearance defects of the diaphragm 6 are further included, one set of LED lamps 3 is arranged above the diaphragm 6, one set of LED lamps 3 is arranged below the diaphragm 6, and the two sets of LED lamps 3 facilitate the inspection of the appearance by workers.

When the device is used, the diaphragm 6 to be tested is fixed on the unreeling mechanism 1, one end of the diaphragm 6 passes through the two conveying rollers 2 and is connected with the reeling mechanism 5, a diaphragm paper tube is also fixed on the reeling mechanism 5 for rewinding the diaphragm, the test speed and the test tension are set, the test start and the test close are controlled, the unreeling mechanism 1 and the reeling mechanism 5 operate under the control of the controller, the cylinder control connecting rod 8 moves downwards, the lower surface of the measuring standard line 7 is abutted on the upper surface of the diaphragm 6, the radian of the diaphragm 6 is measured by the measuring standard line 7, and the appearance test is carried out under the LED lamp 3.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a diaphragm verifying attachment for lithium ion battery, includes receive and releases subassembly and measurement component, its characterized in that: the winding and unwinding assembly comprises an unwinding mechanism (1) and a winding mechanism (5), a diaphragm (6) with a measuring radian is wound on the unwinding mechanism (1) and the winding mechanism (5) together, the measuring assembly comprises two connecting rods (8), a measuring standard line (7) is connected between the two connecting rods (8), the measuring standard line (7) extends along the moving direction of the diaphragm (6), and the lower surface of the measuring standard line (7) is in contact with the upper surface of the diaphragm (6).

2. The separator inspection device for lithium ion batteries according to claim 1, wherein: the device also comprises two machine cases (4), wherein the machine cases (4) are internally provided with air cylinders, and the connecting rods (8) are connected to piston rods of the air cylinders.

3. The separator inspection device for lithium ion batteries according to claim 1, wherein: the unreeling mechanism (1) and the reeling mechanism (5) are of an inflatable shaft structure.

4. The separator inspection device for lithium ion batteries according to claim 1, wherein: the LED lamp assembly is characterized by further comprising two groups of LED lamps (3) for inspecting appearance flaws of the diaphragm (6), wherein one group of LED lamps (3) are arranged above the diaphragm (6), and the other group of LED lamps (3) are arranged below the diaphragm (6).

5. The separator inspection device for lithium ion batteries according to claim 1, wherein: the winding and unwinding components further comprise two conveying rollers (2), the two conveying rollers (2) are respectively located at two ends of the measuring standard line (7), the distance between the two conveying rollers (2) is larger than the length of the measuring standard line (7), the diaphragm (6) is in contact with the two conveying rollers (2), and the diaphragm (6) located between the two conveying rollers (2) is parallel to the measuring standard line (7).

6. The separator inspection device for lithium ion batteries according to claim 5, wherein: the two conveying rollers (2) are carbon fiber rollers with smooth surfaces.