Auxiliary device for assisting in observing state of single diaphragm of lithium battery

Abstract

The utility model belongs to the technical field of lithium ion batteries, and particularly relates to an auxiliary device for assisting in observing the state of a single diaphragm of a lithium battery, which comprises a bottom fixing plate, a diaphragm pressing mechanism and an LED (light-emitting diode) backlight plate, threaded holes are formed in the two sides of the bottom fixing plate and used for fixing the diaphragm pressing mechanism. The diaphragm pressing mechanism comprises a pneumatic pressing device, a 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 installed on the outer side of the vertical plate, the pneumatic pressing device is vertically fixed to 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 face of the pressing plate. And the LED backlight plate is embedded into the 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.

Description

Technical Field

[0001] This utility model belongs to the field of lithium-ion battery technology, specifically relating to an auxiliary device for assisting in observing the state of a single separator in a lithium battery. Background Technology

[0002] As a core energy storage component in the new energy field, the safety and performance stability of lithium batteries are of paramount importance. The lithium battery separator, as one of the core components of the battery, plays a crucial role in isolating the positive and negative electrodes to prevent short circuits and allowing ions to pass through. Its porosity, thickness uniformity, and surface defects (such as scratches, pores, and impurities) directly affect the battery's cycle life, charge / discharge efficiency, and safety. Therefore, accurate testing of lithium battery separators is a key step in ensuring battery quality.

[0003] Currently, the inspection of lithium battery separators mainly relies on manual visual inspection or semi-automatic equipment. In traditional manual inspection, operators must hold the separator under natural light for observation. This method has significant drawbacks: firstly, hand tremors can easily cause unstable observations and misjudgments; secondly, the human eye has limited resolution to effectively identify defects such as micron-level pores, tiny black spots, or surface textures, making quantitative analysis of the defect's nature impossible. Although some semi-automatic equipment can assist in inspection, such equipment is mainly designed for continuously running separator rolls on production lines and is ill-suited for the independent inspection of individual separators after battery disassembly.

[0004] It is worth noting that in lithium battery R&D, failure analysis, or quality traceability scenarios, it is often necessary to observe the microscopic state of disassembled individual separators to pinpoint the cause of battery failure or assess the performance degradation of the separator. However, current technologies lack specialized auxiliary observation devices for the state of individual separators after lithium battery disassembly, making it difficult for inspectors to stably and clearly observe the detailed features of individual separators under controlled lighting conditions, thus limiting the accuracy and efficiency of lithium battery quality analysis. Utility Model Content

[0005] The purpose of this invention is to provide an auxiliary device for observing the state of a single separator in a lithium battery, thereby solving the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an auxiliary device for assisting in observing the state of a single separator cell in a lithium battery, comprising:

[0007] Bottom fixing plate, diaphragm pressing mechanism, and LED backlight panel;

[0008] The bottom fixing plate has threaded holes on both sides for fixing the diaphragm pressing mechanism;

[0009] The diaphragm pressing mechanism includes a pneumatic pressing device, a cylinder fixing plate, a vertical plate, a pressure plate, and a buffer layer; the vertical plate is connected to the bottom fixing plate by bolts, the cylinder fixing plate is installed on the outside of the vertical plate, the pneumatic pressing device is vertically fixed on the cylinder fixing plate, the pressure plate is threadedly connected to the piston rod of the pneumatic pressing device, and the buffer layer is attached to the bottom surface of the pressure plate.

[0010] The LED backlight panel is embedded in the groove of the bottom fixing plate, with a surface illuminance uniformity of ≥85%, an adjustable light source intensity range of 100-2000 lux, and supports quick disassembly and assembly to adapt to diaphragms of different sizes.

[0011] Preferably, the buffer layer is made of foam material to provide flexible clamping force to avoid damage to the diaphragm.

[0012] Preferably, the maximum width of the adaptable diaphragm for the LED backlight panel is 250 mm.

[0013] Preferably, the diaphragm pressing mechanism further includes a support plate, and the upright plate is fixed to both sides of the support plate by bolts to form a vertical support structure.

[0014] Preferably, the pneumatic clamping device is a cylinder-driven structure, and the clamping force of the pressure plate is controlled by adjusting the air pressure.

[0015] Preferably, the threaded hole between the bottom fixing plate and the diaphragm pressing mechanism is of specification M6.

[0016] The beneficial effects of this utility model are as follows: Through the synergistic design of the diaphragm pressing mechanism and the LED backlight panel, this utility model significantly improves the detection accuracy and stability of single-piece lithium battery diaphragms; the diaphragm pressing mechanism adopts a pneumatically driven pressing plate in conjunction with a foam buffer layer, which can apply a uniform and flexible pressing force to the diaphragm, avoiding misjudgments caused by manual hand-held shaking, while the rigid vertical support structure ensures the mechanical stability of the fixation; the LED backlight panel supports a variable light source intensity of 100-2000 lux and ≥85% illuminance uniformity, allowing inspectors to flexibly adjust the illumination according to the characteristics of the diaphragm, enhancing the sensitivity of identifying defects such as micron-level pores and impurities, and eliminating the blind spots of observation under traditional natural light. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a side view of the present invention. Detailed Implementation

[0019] It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixed connection," and "fixed connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0023] like Figure 1 As shown, an auxiliary device for observing the state of a single lithium battery separator consists of three core modules: a bottom fixing plate 1, a separator pressing mechanism 3, and an LED backlight panel 2. The components are assembled via standardized mechanical interfaces. The specific implementation steps are as follows:

[0024] The bottom fixing plate 1 is a rectangular flat plate structure made of aluminum alloy or engineering plastic with a matte finish to reduce glare. It has symmetrically machined M6 threaded holes on both sides for fixing the diaphragm pressing mechanism 3; a rectangular groove is provided in the center for embedding the LED backlight panel 2. The LED backlight panel 2 is fixed in the groove by slots or bolts, with a surface illuminance uniformity of ≥85%, and integrates a light source intensity adjustment module such as a knob or touch panel, supporting continuous adjustment from 100-2000 lux.

[0025] The upright plate 6 is a vertically set rectangular plate, which is fixed to both sides of the raised plate 9 with bolts at the bottom to form a "door"-shaped vertical support structure. The height of the raised plate 9 is designed according to the thickness of the diaphragm and the observation space requirements, usually 10-30mm, to ensure that there is enough space under the diaphragm to accommodate the light transmission of the LED backlight plate 2.

[0026] M6 threaded holes are machined on both outer sides of the upright plate 6, and the horizontal plate structure of the cylinder fixing plate 5 is fixed by screws. The pneumatic clamping device 4, such as a small cylinder, is vertically installed at the center of the cylinder fixing plate 5 by bolts, and its piston rod extends downward. The pressure plate 7 is a rectangular flat plate with internal threaded holes machined on the top surface, which are connected to the lower end of the cylinder piston rod by threads to ensure coaxiality. The bottom surface of the pressure plate 7 is fully covered with foam 8, such as polyurethane foam, with a foam thickness of 2-5mm, to provide flexible clamping force.

[0027] After disassembling the lithium battery, lay the single-piece separator flat on the surface of the bottom fixing plate 1, aligning it with the projection area of ​​the LED backlight panel 2; start the pneumatic pressing device 4, and the cylinder piston rod drives the pressure plate 7 to move vertically downward. After the foam 8 contacts the separator, the cylinder air pressure is usually set to 0.2-0.5MPa to provide a flexible pressing force, evenly fixing the two sides of the separator and avoiding hard squeezing that would cause the separator to deform.

[0028] Adjust the intensity of the LED backlight panel 2 according to the diaphragm thickness and defect type: When detecting thin diaphragms with a thickness of <12μm or light-colored defects, use low illumination such as 200-500 lux to reduce reflection; when detecting thick diaphragms with a thickness of ≥12μm or dark impurities, use high illumination such as 1000-2000 lux to enhance contrast.

[0029] Inspectors can visually inspect the diaphragm surface for defects such as pore distribution, black spots, and scratches under LED backlight transmission, or with the aid of a magnifying glass. Because the uniformity of the light source is ≥85%, blind spots caused by excessive brightness in some areas under traditional natural light can be avoided.

[0030] When testing diaphragms of different widths up to 250mm, the LED backlight panel 2 can be quickly disassembled without tools, and a backlight module of the appropriate size can be replaced. If it is necessary to adjust the fixed position of the diaphragm in the length direction, the applicable range of the device can be expanded by increasing or decreasing the number of shims 9 or replacing the vertical plates 6 of different lengths.

[0031] For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. An auxiliary device for assisting in observing the state of a single separator cell in a lithium battery, characterized in that, include: Bottom fixing plate (1), diaphragm pressing mechanism (2) and LED backlight plate (3); The bottom fixing plate (1) has threaded holes on both sides for fixing the diaphragm pressing mechanism (2); The diaphragm pressing mechanism (2) includes a pneumatic pressing device (4), a cylinder fixing plate (5), a vertical plate (6), a pressure plate (7), and a buffer layer (8); the vertical plate (6) is connected to the bottom fixing plate (1) by bolts, the cylinder fixing plate (5) is installed on the outside of the vertical plate (6), the pneumatic pressing device (4) is vertically fixed on the cylinder fixing plate (5), the pressure plate (7) is threadedly connected to the piston rod of the pneumatic pressing device (4), and the buffer layer (8) is attached to the bottom surface of the pressure plate (7); The LED backlight panel (3) is embedded in the groove of the bottom fixing plate (1).

2. The auxiliary device according to claim 1, characterized in that, The buffer layer (8) is made of foam and is used to provide flexible clamping force to avoid damage to the diaphragm.

3. The auxiliary device according to claim 1, characterized in that, The maximum width of the diaphragm that the LED backlight panel (3) can be adapted to is 250 mm.

4. The auxiliary device according to claim 1, characterized in that, The diaphragm pressing mechanism (2) also includes a raised plate (9), and the upright plate (6) is fixed to both sides of the raised plate (9) by bolts to form a vertical support structure.

5. The auxiliary device according to claim 1, characterized in that, The pneumatic clamping device (4) is a cylinder-driven structure, and the clamping force of the pressure plate (7) is controlled by adjusting the air pressure.

6. The 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 specification.

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