CN-224216570-U - Auxiliary device for auxiliary observation of state of lithium battery single-piece diaphragm

Abstract

The utility model belongs to the technical field of lithium ion batteries, and in particular relates to an auxiliary device for auxiliary observation of a single diaphragm state of a lithium battery, which comprises a bottom fixing plate, a diaphragm pressing mechanism and an LED backlight plate; the LED backlight plate is characterized in that threaded holes are formed in two sides of the bottom fixing plate and used for fixing the diaphragm pressing mechanism, the diaphragm pressing mechanism comprises a pneumatic pressing device, an air cylinder fixing plate, a vertical plate, a pressing plate and a buffer layer, the vertical plate is connected with the bottom fixing plate through bolts, the air cylinder fixing plate is arranged on the outer side of the vertical plate, the pneumatic pressing device is vertically fixed on the air cylinder fixing plate, the pressing plate is in threaded connection with a piston rod of the pneumatic pressing device, the buffer layer is attached to the bottom surface of the pressing plate, and the LED backlight plate is embedded into a groove of the bottom fixing plate. According to the utility model, through the collaborative design of the diaphragm pressing mechanism and the LED backlight plate, the detection precision and stability of the single diaphragm of the lithium battery are obviously improved.

Inventors

• XIN YI
• JIA BIN
• WANG YUNTAO

Assignees

• 天津力神聚元新能源科技有限公司
• 天津力神电池股份有限公司

Dates

Publication Date

20260508

Application Date

20250519

Claims (6)

1. 1. An auxiliary device for auxiliary observation of a state of a single-piece separator of a lithium battery, comprising: the LED backlight module comprises a bottom fixing plate (1), a diaphragm pressing mechanism (2) and an LED backlight plate (3); Screw holes are formed in two sides of the bottom fixing plate (1) and used for fixing the diaphragm pressing mechanism (2); The diaphragm pressing mechanism (2) comprises a pneumatic pressing device (4), an air cylinder fixing plate (5), a vertical plate (6), a pressing plate (7) and a buffer layer (8), wherein the vertical plate (6) is connected with the bottom fixing plate (1) through bolts, the air cylinder fixing plate (5) is arranged on the outer side of the vertical plate (6), the pneumatic pressing device (4) is vertically fixed on the air cylinder fixing plate (5), the pressing plate (7) is in threaded connection with a piston rod of the pneumatic pressing device (4), and the buffer layer (8) is attached to the bottom surface of the pressing plate (7); The LED backlight plate (3) is embedded into the groove of the bottom fixing plate (1).
2. 2. Auxiliary device according to claim 1, characterized in that the buffer layer (8) is of foam material for providing a flexible compression force to avoid membrane damage.
3. 3. Auxiliary device according to claim 1, characterized in that the maximum fitting membrane width of the LED backlight (3) is 250mm.
4. 4. Auxiliary device according to claim 1, characterized in that the diaphragm pressing mechanism (2) further comprises a lifting plate (9), and the vertical plates (6) are fixed on both sides of the lifting plate (9) through bolts to form a vertical supporting structure.
5. 5. Auxiliary device according to claim 1, characterized in that the pneumatic pressing device (4) is of a cylinder-driven structure, the pressing force of the pressing plate (7) being controlled by adjusting the air pressure.
6. 6. Auxiliary device according to claim 1, characterized in that the threaded hole between the bottom fixing plate (1) and the diaphragm pressing mechanism (2) is of M6 gauge.

Description

Auxiliary device for auxiliary observation of state of lithium battery single-piece diaphragm Technical Field The utility model belongs to the technical field of lithium ion batteries, and particularly relates to an auxiliary device for auxiliary observation of a single diaphragm state of a lithium battery. Background The lithium battery is used as a core energy storage element in the field of new energy, and the safety and the performance stability of the lithium battery are important. The lithium battery diaphragm is used as one of the core components of the battery, plays a key role in isolating the positive electrode from the negative electrode, preventing short circuit and allowing ions to pass through, and the porosity, thickness uniformity and surface defects (such as scratches, holes, impurity adhesion and the like) of the lithium battery diaphragm directly influence the cycle life, charge-discharge efficiency and safety of the battery. Therefore, accurate detection of the lithium battery diaphragm is a key link for guaranteeing the battery quality. Currently, detection of lithium battery separators mainly relies on manual visual detection or semi-automatic equipment detection. In the traditional manual detection mode, an operator needs to hold the diaphragm to observe under natural light, and the method has the obvious defects that on one hand, the diaphragm is easy to observe unstably due to hand shake to cause misjudgment when being held manually, and on the other hand, the human eye resolution is limited for the defects of micro-scale tiny pores, tiny black points or surface grains and the like, so that the effective identification is difficult, and the quantitative analysis of the defect properties is more impossible. Although some semi-automatic equipment can assist in detection, the equipment is mainly aimed at diaphragm coiled materials running continuously on a production line, and is difficult to adapt to independent detection scenes of single diaphragms after the disassembly of a battery. It is worth noting that in the lithium battery research and development, failure analysis or quality tracing scene, microscopic state observation is often required to be carried out on the disassembled single-piece diaphragm so as to locate the cause of battery failure or evaluate the performance attenuation condition of the diaphragm. However, the lack of an auxiliary observation device specially aiming at the state of the single diaphragm after the disassembly of the lithium battery in the prior art leads to the difficulty that a detector stably and clearly observes the detail characteristics of the single diaphragm under the controllable illumination condition, and restricts the accuracy and the efficiency of the quality analysis of the lithium battery. Disclosure of utility model The utility model aims to provide an auxiliary device for auxiliary observation of the state of a single diaphragm of a lithium battery, which solves the problems in the prior art. In order to achieve the above purpose, the utility model provides the following technical scheme that the auxiliary device for auxiliary observation of the state of the lithium battery single-piece diaphragm comprises: the bottom fixing plate, the diaphragm pressing mechanism and the LED backlight plate; Screw holes are formed in two sides of the bottom fixing plate and used for fixing the diaphragm pressing mechanism; The diaphragm pressing mechanism comprises a pneumatic pressing device, an air cylinder fixing plate, a vertical plate, a pressing plate and a buffer layer, wherein the vertical plate is connected with the bottom fixing plate through bolts, the air cylinder fixing plate is arranged on the outer side of the vertical plate, the pneumatic pressing device is vertically fixed on the air cylinder fixing plate, the pressing plate is in threaded connection with a piston rod of the pneumatic pressing device, and the buffer layer is attached to the bottom surface of the pressing plate; The LED backlight plate is embedded into the groove of the bottom fixing plate, the uniformity of the surface illuminance of the LED backlight plate is more than or equal to 85%, the adjustable range of the light source intensity is 100-2000lux, and the LED backlight plate supports quick assembly and disassembly to adapt to diaphragms with different sizes. Preferably, the buffer layer is made of foam material and is used for providing flexible pressing force to avoid damage to the diaphragm. Preferably, the maximum adaptive diaphragm width of the LED backlight plate is 250mm. Preferably, the diaphragm pressing mechanism further comprises a lifting plate, and the vertical plates are fixed on two sides of the lifting plate through bolts to form a vertical supporting structure. Preferably, the pneumatic pressing device is of an air cylinder driving structure, and the pressing force of the pressing plate is controlled by adjusting air pressure. Preferably, the thre