Visual detection device for wettability of electrolyte

Abstract

The utility model provides an electrolyte wettability visualized detection device, relates to the battery technical field, including bottom plate, weighing mechanism and elevating mechanism, wherein the weighing mechanism is installed on the bottom plate, the elevating mechanism is installed on the weighing mechanism, the elevating mechanism is connected with the clamping part for clamping the roll core, the electrolyte is placed on the bottom plate, and the clamping part is connected with the clamping part for clamping the roll core. The roll core can be immersed into the electrolyte through the lifting mechanism; according to the device, the electrolyte infiltration degree can be intuitively judged according to the time required for performing color marking on the electrolyte and diffusing the same scale, the electrolyte component change is disassembled and centrifugally detected through weight comparison, the operation is simple and efficient, the device is closer to the actual use state, and the device has guiding significance for actual production.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a visual detection device for electrolyte wettability. Background Art

[0002] Lithium-ion batteries are increasingly being used in various fields of new energy due to their environmentally friendly properties, including new energy vehicles. At present, new energy vehicles still face many challenges. The range, charging time, winter mileage, and warranty period of new energy vehicles are all important factors for consumers to consider.

[0003] To increase the range of electric vehicles, it is necessary to increase the energy density of the entire battery pack and carry more power in a fixed space. Therefore, increasing the volume energy density and mass energy density of the single battery cell is one of the effective means; battery cell design, material system, and structural optimization can all increase energy density.

[0004] In terms of battery cell design, higher capacity and energy density can be achieved by increasing the compaction density and surface density of the pole piece while keeping the shell space unchanged. In addition, as the battery cell design improves, the porosity of the pole piece becomes smaller, and the amount of electrolyte that can be accommodated will also decrease. In order to maintain the performance of the battery, a suitable injection volume and injection coefficient are required, and two injections are used to achieve a certain amount of electrolyte injection into the shell, ensuring the high energy density of the battery cell while taking into account the performance indicators. Whether the electrolyte under the high energy density design condition is fully infiltrated in the pole piece is an important basis for judging whether the injection volume meets the requirements; the wettability of the electrolyte in the pole piece is generally judged by disassembling the battery cell formation and volume separation interface, according to the degree of wetting of the interface electrolyte, color, and the presence or absence of other abnormal phenomena. This method requires disassembly and can only be judged in a directional manner. It cannot provide a quantitative basis for the degree of wetting, which makes the judgment process inconvenient. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a visual detection device for electrolyte wettability to avoid disassembly of the winding core and to judge the wettability of the electrolyte in the winding core.

[0006] Based on the technical problems existing in the background technology, the utility model proposes a visual detection device for electrolyte wettability, including a base plate, a weighing mechanism and a lifting mechanism, wherein the weighing mechanism is installed on the base plate, the lifting mechanism is installed on the weighing mechanism, a clamping component for clamping a winding core is connected to the lifting mechanism, an electrolyte is placed on the base plate, and the winding core can be immersed in the electrolyte through the lifting mechanism.

[0007] Preferably, the lifting mechanism comprises a sliding rod and a sliding seat, the sliding rod is vertically mounted on the weighing mechanism, and the sliding seat changes the distance between the sliding seat and the weighing machine by sliding the sliding rod.

[0008] Preferably, the length of the winding core immersed in the electrolyte can be adjusted by a lifting mechanism.

[0009] Preferably, the slide bar is provided with a scale.

[0010] Preferably, the electrolyte contains an electrolyte color marker.

[0011] Preferably, the clamping component is mounted on the slide seat via a rotating shaft.

[0012] Compared with the prior art, the present invention proposes a device for visually detecting wettability of electrolyte, which adopts the above technical solution and achieves the following technical effects:

[0013] The utility model can intuitively judge the degree of electrolyte infiltration by color marking the electrolyte and the time required for diffusion of the same scale, and disassemble and centrifuge to detect changes in electrolyte composition by weight comparison. The operation is simple and efficient, and is closer to the actual use state, which has guiding significance for actual production. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] In the figure: 1, bottom plate; 2, weighing mechanism; 3, lifting mechanism; 4, clamping component; 31, sliding rod; 32, sliding seat; 311, scale. DETAILED DESCRIPTION

[0016] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0018] Example

[0019] Please refer to Figure 1 The utility model proposes a visual detection device for electrolyte wettability, comprising a bottom plate 1, a weighing mechanism 2 and a lifting mechanism 3, wherein the weighing mechanism 2 is mounted on the bottom plate 1, the lifting mechanism 3 is mounted on the weighing mechanism 2, a clamping component 4 for clamping a core is connected to the lifting mechanism 3, an electrolyte is placed on the bottom plate 1, and the core can be immersed in the electrolyte through the lifting mechanism 3. The electrolyte includes electrolyte A and electrolyte B, the core is fixed by a clamping component, and the initial weight is recorded by a weighing component; then the core is completely immersed in electrolyte A through a rotating component, and is returned to the original position after the weight reaches a certain value; then the core is transferred to electrolyte B, which has a marking color, and part of the core is immersed in electrolyte B, and is returned to the original position after the weight reaches a certain value again; the core is rotated at a certain angle, and the part immersed in electrolyte B is located at the upper part, and then the marking color in electrolyte B is observed to gradually diffuse from the upper part to the middle part and then to the lower part, and the time taken for each diffusion scale is recorded. The time required for color change under a fixed scale is used to achieve quantitative visualization and thus determine the wettability of the electrolyte.

[0020] In a specific embodiment, refer to Figure 1 The lifting mechanism 3 includes a slide bar 31 and a slide seat 32. The slide bar 31 is vertically mounted on the weighing mechanism 2. The slide seat 32 changes the distance between the slide bar 31 and the weighing machine. The weighing mechanism 2 can record the original weight of the winding core, the weight after the electrolyte is absorbed once, and the weight after the electrolyte is absorbed twice.

[0021] In a specific embodiment, refer to Figure 1 The length of the winding core immersed in the electrolyte can be adjusted by the lifting mechanism 3. In the utility model, the lifting is achieved by means of a slider and a slide rod 31. Further, the lifting function can also be achieved by means of a wire coil.

[0022] In a specific embodiment, refer to Figure 1, a scale 311 is provided on the slide bar 31. The scale 311 on the slide bar 31 can quantitatively mark the position where the electrolyte color changes. The core is recorded with the weighing mechanism 2 to realize the original weight, and then immersed in the electrolyte through the lifting mechanism 3 to record the weight, and then transferred into the electrolyte, the core is partially immersed in the electrolyte, and the electrolyte has a marked color, and the weight is recorded again; by observing the marked color in the electrolyte, the time taken for the diffusion scale is recorded according to the measuring component; different components work in sequence to realize the visual detection of wettability.

[0023] In a specific embodiment, refer to Figure 1 The electrolyte contains an electrolyte color marker. The electrolyte color marker is a non-aqueous solvent, and the color can be a visible natural color or other reagents that require infrared or ultraviolet light to develop color.

[0024] In a specific embodiment, refer to Figure 1 The clamping component 4 is installed on the slide seat 32 through a rotating shaft.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A visual detection device for electrolyte wettability, characterized in that: The invention comprises a base plate (1), a weighing mechanism (2) and a lifting mechanism, wherein the weighing mechanism (2) is mounted on the base plate (1), the lifting mechanism (3) is mounted on the weighing mechanism (2), a clamping component (4) for clamping a winding core is connected to the lifting mechanism (3), an electrolyte is placed on the base plate (1), and the winding core can be immersed in the electrolyte through the lifting mechanism (3).

2. The electrolyte wettability visualization detection device according to claim 1, characterized in that: The lifting mechanism (3) comprises a sliding rod (31) and a sliding seat (32). The sliding rod (31) is vertically mounted on the weighing mechanism (2). The sliding seat (32) changes the distance between the sliding rod (31) and the weighing machine.

3. The electrolyte wettability visualization detection device according to claim 1, characterized in that: The length of the winding core immersed in the electrolyte can be adjusted by a lifting mechanism (3).

4. The electrolyte wettability visualization detection device according to claim 2, characterized in that: The sliding rod (31) is provided with a scale (311).

5. The electrolyte wettability visualization detection device according to claim 1, characterized in that: The electrolyte has an electrolyte color marker in it.

6. The electrolyte wettability visualization detection device according to claim 2, characterized in that: The clamping component (4) is mounted on the slide seat (32) via a rotating shaft.

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