CN217689189U

CN217689189U - Lithium battery diaphragm surface static and internal charge amount detection device

Info

Publication number: CN217689189U
Application number: CN202220841475.3U
Authority: CN
Inventors: 张涛钢; 王郗; 林敬; 潘思宁; 王东; 胡明明; 许洪
Original assignee: Hefei Xingyuan New Energy Material Co ltd
Current assignee: Hefei Xingyuan New Energy Material Co ltd
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2022-10-28
Anticipated expiration: 2032-04-12

Abstract

The utility model discloses a device for detecting the surface static electricity and the internal charge quantity of a lithium battery diaphragm, which comprises a vessel with an upward opening, wherein the vessel is connected with a charge quantity tester; two brackets are arranged on the outer wall of the vessel; wherein, one bracket is connected with a static tester in a vertical sliding way, and the other bracket is connected with a static eliminator in a vertical sliding way; the static tester and the static eliminator are arranged above the opening of the vessel. The utility model discloses combine the surface static and the inside micropore charge volume test that lithium cell diaphragm static relates to, and use a testing arrangement can test to realize synthesizing aassessment lithium cell diaphragm static level, it is more comprehensive, simple and convenient to lithium cell diaphragm static test.

Description

Lithium battery diaphragm surface static electricity and internal charge quantity detection device

Technical Field

The utility model relates to a lithium battery diaphragm detects technical field, specifically is a lithium battery diaphragm surface static and inside electric charge amount detection device.

Background

The diaphragm is one of four key materials of the lithium battery, and the performance of the diaphragm determines the interface structure, the internal resistance and the like of the battery, and directly influences the capacity, the circulation, the safety performance and other characteristics of the battery. The diaphragm made of polyethylene material is difficult to avoid static electricity; when static electricity in the diaphragm exceeds the standard, the production stability of a battery winding procedure is seriously influenced, and the production efficiency is reduced; meanwhile, when the static electricity is too high, the diaphragm can be wrinkled, so that the anode and the cathode of the battery are contacted, and great safety risk exists; and the diaphragm has micropores, so static electricity exists on the surface of the diaphragm and possibly exists in the micropores, the static electricity gradually migrates to the surface of the diaphragm along with the lapse of time, the risk is higher, and the detection difficulty is high.

At present, surface static electricity and internal micropore charge quantity tests related to lithium battery diaphragm static electricity are separately carried out, factors such as change of test environment, diaphragm area size and the like can cause interference to test data, and large errors exist in measurement results.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lithium cell diaphragm surface static and inside charge amount detection device to solve the problem of proposing in the above-mentioned background art, combine lithium cell diaphragm surface static and inside micropore charge amount test, use an equipment can test, thereby realize comprehensive aassessment lithium cell diaphragm static level, it is more comprehensive, simple and convenient to lithium cell diaphragm static test.

In order to achieve the above object, the utility model provides a following technical scheme:

a device for detecting the surface static and internal charge quantity of a lithium battery diaphragm comprises a vessel with an upward opening, wherein the vessel is connected with a charge quantity tester; two brackets are arranged on the outer wall of the vessel; wherein, one bracket is connected with a static tester in a vertical sliding way, and the other bracket is connected with a static eliminator in a vertical sliding way; the static tester and the static eliminator are arranged above the opening of the vessel.

As a further aspect of the present invention: the static tester comprises a static tester main body and a probe pivoted on the static tester main body.

As a further aspect of the present invention: the support comprises a vertical rod, a slide way arranged along the length direction of the vertical rod and a slide block connected with the slide way in a sliding manner.

As a further aspect of the present invention: the static eliminator is connected with a high-voltage power supply.

As a further aspect of the present invention: the vessel is connected with the charge quantity tester through a signal line.

As a further aspect of the present invention: the vessel includes a cylindrical housing and a faraday cage housed within the cylindrical housing.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model combines the surface static electricity related to the lithium battery diaphragm static electricity and the internal micropore charge quantity test, and can test by using one test device, thereby realizing comprehensive evaluation of the static level of the lithium battery diaphragm, and more comprehensive and simple and convenient test of the lithium battery diaphragm static electricity;

the utility model discloses be in under the test environment of certain condition when using to adopt the diaphragm of same block area size to test. The method avoids the interference of environmental change and diaphragm area to test data, reduces test error and makes the result more accurate.

The utility model provides a static tester and static eliminator height can be adjusted in a flexible way, is applicable to the operating mode of different grade type, thickness and quantity diaphragm survey.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the installation of the middle bracket of the present invention;

in the figure: 1-vessel, 2-charge tester, 3-support, 31-vertical rod, 32-slide, 33-slide, 4-static tester, 41-static tester main body, 42-probe, 5-static eliminator, 6-high voltage power supply, 7-signal line and 8-diaphragm.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the connection can be mechanical connection or communication connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Referring to fig. 1-2, in an embodiment of the present invention, a device for detecting surface electrostatic charge and internal charge of a lithium battery diaphragm includes a vessel 1 with an upward opening, wherein the vessel 1 is used for accommodating a diaphragm 8 to be detected. The vessel 1 is connected with the charge tester 2 through a signal wire 7; the outer wall of the vessel 1 is provided with two brackets 3; wherein, one bracket 3 is connected with a static electricity tester 4 in a vertical sliding way, and the other bracket 3 is connected with a static electricity eliminator 5 in a vertical sliding way; the static electricity tester 4 and the static electricity eliminator 5 are arranged above the opening of the vessel 1.

Further, the static electricity tester 4 includes a static electricity tester main body 41, and a probe 42 pivotally connected to the static electricity tester main body 41. The height of the probe 42 can be changed as the electrostatic tester main body 41 slides up and down on the stand 3, and the probe angle can also be changed. The static tester 4 also includes a display screen that displays the surface static value of the test diaphragm 8 by the probe 42.

Further, the charge quantity tester 5 includes a display and a switch, and the display is used for displaying the quantity of the charge contained in the diaphragm 8 to be tested.

Further, the bracket 3 comprises a vertical rod 31, a slide way 32 arranged along the length direction of the vertical rod 31, and a slide block 33 connected with the slide way 32 in a sliding manner, wherein the slide block 33 slides up and down in the slide way 32 in a limited manner, and the back surface of the slide block 32 is fixedly connected with the static electricity tester 4 or the static electricity eliminator 5 through bolts. The static eliminator 5 is connected to a high-voltage power supply 6, and electric power is supplied from the high-voltage power supply 6.

Further, the vessel 1 comprises a cylindrical housing 11 and a faraday cage 12 accommodated in the cylindrical housing 11. The bracket 3 is fixedly connected with the cylindrical shell 11.

Please refer to fig. 2, which is a schematic diagram illustrating the connection between the electrostatic tester 4 and the bracket 3; the connection between the electrostatic eliminator 5 and the bracket 3 is similar to that shown in fig. 2, and will not be described herein.

The utility model discloses when using, need in humidity 15% +/-5 and temperature 25 deg.C + -5 environment. The electrostatic tester 4 and the charge amount tester 2 are switched on. Adjusting the bracket 3, and adjusting the static tester 4 and the static eliminator 5 to proper heights; an 80mm by 80mm (length by width) membrane 8 to be measured is cut and placed in a faraday cup 12. After reading the display screen of the static electricity tester 4, the static electricity eliminator 5 is started to eliminate the static electricity on the surface of the diaphragm 8, then the reading of the display of the charge tester 2 is read, and the reading is recorded. If the electric charge quantity of the single diaphragm 8 is too small, a plurality of diaphragms 8 can be placed for testing and averaging.

Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.

Therefore, the above description is only for the preferred embodiment of the present application and is not intended to limit the scope of the present application; all the equivalent changes made within the scope of the claims of the present application are the protection scope of the claims of the present application.

Claims

1. A device for detecting the surface electrostatic and internal charge quantity of a lithium battery diaphragm comprises a vessel (1) with an upward opening, and is characterized in that the vessel (1) is connected with a charge quantity tester (2); the outer wall of the vessel (1) is provided with two brackets (3); wherein, one support (3) is connected with a static electricity tester (4) in a vertical sliding way, and the other support (3) is connected with a static electricity eliminator (5) in a vertical sliding way; the static tester (4) and the static eliminator (5) are arranged above the opening of the vessel (1).

2. The device for detecting the surface electrostatic charge and the internal charge quantity of the lithium battery diaphragm as claimed in claim 1, wherein the static tester (4) comprises a static tester main body (41) and a probe (42) pivoted on the static tester main body (41).

3. The device for detecting the surface electrostatic charge and the internal charge quantity of the lithium battery diaphragm as claimed in claim 1, wherein the bracket (3) comprises a vertical rod (31), a slide way (32) arranged along the length direction of the vertical rod (31), and a slide block (33) connected with the slide way (32) in a sliding manner.

4. The lithium battery separator surface electrostatic and internal charge amount detecting device as claimed in claim 1, wherein the static eliminator (5) is connected with a high voltage power supply (6).

5. The device for detecting the surface electrostatic and internal charge quantity of the lithium battery diaphragm as claimed in claim 1, wherein the vessel (1) is connected with a charge quantity tester (2) through a signal wire (7).

6. The lithium battery separator surface electrostatic and internal charge amount detection device as claimed in claim 1, wherein the vessel (1) comprises a cylindrical housing (11) and a faraday cage (12) accommodated in the cylindrical housing (11).