Clamping device for battery detection

Abstract

The utility model relates to a clamping device used for battery detection, the clamping device comprises a tray assembly used for bearing a battery and a clamping assembly used for clamping the battery in a releasable manner, the clamping assembly comprises a fixed part and a movable part, the movable part can be actuated to move in the direction towards or away from the fixed part, and the tray assembly is used for holding the battery. The tray assembly comprises an X-ray permeable tray comprising a carrier designed to allow the battery to be placed on the carrier in at least a first orientation and a second orientation, where the second orientation is rotated 90 DEG with respect to the first orientation. By the adoption of the clamping device, particularly the X-ray penetrable tray made of the carbon fiber material, the clamping device can be compatible with batteries with different sizes and different orienting / positioning directions, the field flexibility and the production efficiency are improved, the X-ray attenuation is small, and the imaging quality and the detection accuracy are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery detection, in particular to a clamping device used for battery detection. Background Art

[0002] With the continuous popularization of new energy vehicles, battery technology is also developing rapidly. Lithium-ion batteries have been widely studied and applied in the field of new energy vehicles due to their advantages such as high operating voltage, light weight and high energy density. Due to the high safety performance requirements of lithium-ion batteries, there are extremely high requirements for the accuracy, stability and automation level of lithium battery equipment in the battery manufacturing process. At the same time, how to judge the quality and safety and reliability of the manufactured batteries, battery testing is a very important link. The production process of lithium batteries is relatively long. On the whole, the manufacturing process of lithium batteries can be divided into the front-end process (pole sheet manufacturing), the middle-end process (cell synthesis) and the back-end process (formation packaging). X-ray non-destructive testing is usually used in the back-end process of lithium battery production. It is mainly used to detect whether the internal structure of the packaged lithium battery meets the production process, such as the alignment of the stacking or winding, the internal structure of the pole ear and the coating of the positive and negative pole sheets, and the condition of the negative electrode and the shell wall in the battery (such as spacing, touch distance, bending state of the pole ear, etc.). The internal defects of the packaged lithium battery can be intuitively found through the detection image to control the product quality. X-ray inspection equipment can be connected to lithium battery production lines to achieve 100% inspection of lithium batteries, automatic judgment, data storage, identification, screening and isolation of defective products, thereby realizing automated control of the entire battery inspection process.

[0003] Lithium-ion battery packaging is divided into two categories, one is soft-pack batteries and the other is metal-cased batteries. Metal-cased batteries are widely used in the field of new energy vehicles due to their large single-cell capacity, large assembly, simple capacity battery process, continuous high-current discharge, greatly improved internal protection of the battery cell, and the ability to be customized according to customer needs.

[0004] However, the complex process and variable size of metal case batteries also bring many inconveniences to the process of X-ray nondestructive testing. Because metal case batteries are highly customized batteries, and each customer has different requirements for them, the size, lug length, and lug position of square case batteries may vary greatly, which makes it difficult for existing fixtures in the prior art to meet the testing requirements for different square case batteries, and therefore lacks versatility. At the same time, due to the complex process, the image of metal case batteries in X-rays is relatively complex, and existing fixtures are difficult to meet image quality and detection accuracy.

[0005] Therefore, it is necessary to provide an improved clamping device for battery testing, so as to solve at least one of the above problems and / or other problems existing in the prior art. Utility Model Content

[0006] To achieve the above-mentioned purpose, the utility model provides a clamping device for battery testing, the clamping device comprising a tray assembly for carrying a battery and a clamping assembly for releasably clamping the battery, wherein the clamping assembly comprises a fixed part and a movable part, and the movable part can be actuated to move in a direction toward or away from the fixed part; wherein the tray assembly comprises an X-ray transparent tray, the tray comprises a bearing portion, and the bearing portion is designed to allow the battery to be placed on the bearing portion in at least a first orientation and a second orientation, wherein the second orientation is rotated 90° relative to the first orientation.

[0007] As an implementation mode of the present invention, the tray is made of carbon fiber material.

[0008] As an implementation mode of the present utility model, the bearing portion is in a cross shape and has four radially extending portions.

[0009] As an embodiment of the present invention, the tray assembly further includes a moving frame, and the tray further includes two mounting plates extending at an angle from two opposite radially extending portions of the four radially extending portions, respectively, and the tray is fixed to the moving frame via the two mounting plates.

[0010] As an implementation manner of the present utility model, the movable frame is in a quadrilateral shape.

[0011] As an embodiment of the utility model, the fixed part of the clamping assembly includes a mounting seat and a first clamping jaw, and the movable part of the clamping assembly includes an adjustment mechanism and a second clamping jaw, and the second clamping jaw can be actuated to move in a direction toward or away from the first clamping jaw.

[0012] As an embodiment of the present utility model, the clamping assembly further includes a movable base, and the mounting base and the adjusting mechanism are fixed to the movable base.

[0013] As an implementation manner of the present utility model, the first clamping jaw and the second clamping jaw are respectively connected to the mounting seat and the adjusting mechanism in a detachable manner.

[0014] As one embodiment of the utility model, the adjustment mechanism includes a push rod, an adjustment assembly, a bearing and an elastic member, wherein the push rod includes an adjustment bevel; as the push rod moves from an initial position under the action of an external force, the bearing moves along the adjustment bevel in a first direction so that the adjustment assembly compresses the elastic member and drives the second clamping jaw to move away from the first clamping jaw; as the push rod returns to the initial position in the absence of an external force, the bearing moves along the adjustment bevel in a second direction opposite to the first direction, and the elastic member provides a restoring force to prompt the adjustment assembly to drive the second clamping jaw to move toward the first clamping jaw.

[0015] As an implementation manner of the present utility model, the first clamping jaw and the second clamping jaw are made of rubber material.

[0016] Compared with the prior art, the clamping device for battery detection according to the utility model can achieve at least one of the following technical effects: since the tray is made of X-ray transparent materials such as carbon fiber, it improves the stability, imaging quality and detection accuracy of the imaging; since the tray is cross-shaped, it ensures compatibility with batteries of different sizes and different positioning directions / orientations of the batteries, thereby improving the flexibility of the site, saving the time of tray replacement due to battery replacement, and greatly improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The features and advantages of the present invention will be clearly understood through the detailed description provided below with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and thus cannot be regarded as limiting the present invention, wherein:

[0018] Figure 1 A perspective view of a clamping device for battery testing according to an embodiment of the utility model is shown, wherein the battery is carried by a tray assembly and clamped by a clamping assembly in a first orientation;

[0019] Figure 2 Shows Figure 1 A three-dimensional view of the clamping device (without a battery placed thereon);

[0020] Figure 3 A perspective view of a tray included in a tray assembly according to an embodiment of the present invention is shown;

[0021] Figure 4 A perspective view showing batteries having different size specifications arranged in a second orientation different from the first orientation being carried by a tray assembly and clamped by a clamp assembly;

[0022] Figure 5a Shows Figure 1 A side view of the clamping device in which the battery is in an unclamped state; Figure 5b Shows Figure 1 A side view of the clamping device in which the battery is in a clamped state; and

[0023] Figure 6 a perspective view partially showing a movable portion included in the clamping assembly; DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, many specific details are set forth so that those skilled in the art can more fully understand and implement the present invention. However, it is obvious to those skilled in the art that the implementation of the present invention may not have some of these specific details. In addition, it should be understood that the present invention is not limited to the specific embodiments described. On the contrary, any combination of the features and elements described below may be considered to implement the present invention, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments and advantages are for illustrative purposes only and should not be regarded as elements or limitations of the claims unless clearly stated in the claims.

[0025] In the following, terms such as "first", "second", etc. are used to describe the elements of the present application. These terms are only used to distinguish the various elements, and are not used to limit the nature, order or number of these elements. The terms "including" and "having" are used to express an open-ended inclusive meaning, and mean that there may be additional elements / components in addition to the listed elements / components.

[0026] Figure 1 A stereoscopic view of a clamping device 1 for battery testing according to an embodiment of the utility model is shown, wherein a battery 2 is carried and clamped by the clamping device 1 in a first orientation. The clamping device 1 includes a tray assembly 10 for carrying the battery 2 and a clamping assembly 20 for releasably clamping the battery 2 (i.e., the battery can be clamped or loosened). The tray assembly 10 and the clamping assembly 20 can be partially fixed to a conveying mechanism (such as a belt drive, a chain drive, a magnetic suspension drive, or other transmission schemes known in the art) so that the entire clamping device 1 and the battery 2 can be driven forward or backward by a conveying member in the conveying mechanism. The tray assembly 10 may include an X-ray-transmissive tray 11. In this way, the clamping device according to the utility model can be used in a battery production line in combination with an X-ray detection device. Figure 1 As shown in , the X-rays emitted by the X-ray source 3 can directly irradiate the battery 2 and penetrate the tray 11 made of, for example, carbon fiber material, and finally reach the flat plate to display the internal structure of the battery, thereby facilitating the detection of the battery.

[0027] Continue to see Figure 2, which clearly shows the tray 11 and the mobile frame 12 included in the tray assembly 10, the tray 11 includes a load-bearing portion 111, the load-bearing portion is designed to allow the battery 2 to be at least in a first orientation (see Figure 1 ) and a second orientation different from the first orientation (see Figure 4 ) is placed on the carrying portion 111, wherein the second orientation is rotated 90° relative to the first orientation.

[0028] As an advantageous embodiment, Figure 2 and Figure 3 As shown, the bearing portion 111 is cross-shaped and has four radially extending portions and two mounting pieces 112 extending at an angle (e.g., vertically) from two opposite radially extending portions of the four radially extending portions, respectively. The mounting pieces 112 are provided with a plurality of mounting holes to allow fasteners to pass therethrough to fix the tray 11 to the mobile frame 12. Figure 2 As shown in FIG. 1 , the mobile frame 12 adopts a quadrilateral structure, which greatly improves the stability of the overall frame and the compatibility with different battery weights.

[0029] It should be known that compared with traditional tray materials (aluminum alloy, polyoxymethylene (POM), acrylic, polycarbonate (PC), PU, ​​etc.), carbon fiber boards have the advantages of low density, high transmittance, low attenuation, and single composition. They can reduce the attenuation of X-rays during battery testing, thereby improving the quality of imaging. At the same time, carbon fiber boards have high strength and high rigidity, and can withstand batteries of different weights (for example, they can be compatible with batteries of higher weights) without deformation, thus improving the stability of imaging. In addition, because carbon fiber materials have high wear resistance, they will not introduce impurities that interfere with the imaging results, thus improving the imaging quality and detection accuracy, and meeting the customer's maintenance-free requirements.

[0030] In addition, since the carbon fiber tray is in a cross shape, compatibility with batteries of different sizes and different placement directions / orientations of batteries is ensured, such as Figure 4 The stereogram shows a different Figure 1 The batteries arranged in the first and second orientations of the battery (which may have different size specifications) are carried and clamped by the clamping device according to the embodiment of the utility model, which improves the flexibility on site, saves the time of pallet replacement caused by battery replacement, and thus greatly improves production efficiency.

[0031] The clamping assembly 20 according to the embodiment of the present invention includes a fixed portion and a movable portion, wherein the movable portion can be actuated to move in a direction toward or away from the fixed portion, thereby allowing the battery 2 to be clamped, or the battery 2 to be placed in or removed from the tray 11. Figure 2As shown, the fixed part includes a mounting seat 21 and a first clamping jaw 22, and the movable part includes an adjustment mechanism 23 and a second clamping jaw 24, and the second clamping jaw 24 can be actuated to move in a direction toward or away from the first clamping jaw 22. The mounting seat 21 and the adjustment mechanism 23 are fixed to a mobile base 25. The mobile base 25 is similar to the aforementioned mobile frame 12, and is intended to be fixed to a conveying mechanism to allow the conveying member to drive the mobile base together with the clamping assembly 1. The mounting seat 21 includes a fixing hole 212 to allow a fastener to pass through the fixing hole and connect to the mobile base. The fixing hole 212 can be waist-shaped (see Figure 2 ) to facilitate the adjustment of batteries of different sizes within a certain range.

[0032] According to an advantageous embodiment, the first clamping jaw 22 and the second clamping jaw 24 are made of rubber material to protect the battery during the process of clamping the battery, and the first clamping jaw 22 and the second clamping jaw 24 are respectively connected to the mounting base 21 and the adjusting mechanism 23 in a detachable manner. In this way, when the clamping jaw needs to be replaced in order to be compatible with batteries of different sizes or with different placement directions or orientations, the original clamping jaw can be directly removed and replaced with other suitable clamping jaws. For example, see Figure 4 When the battery is changed from being placed horizontally to being placed vertically (the battery can also be replaced with a battery 2' having other different sizes), the first clamping jaw 22' and the second clamping jaw 24' can be replaced to realize the replacement of different battery types.

[0033] Continue to see Figure 5a-5b Combined with Figure 6 Next, it will be described how to clamp and release the battery 2 by the clamping device 1 of the embodiment of the utility model. The adjustment mechanism 23 included in the movable part of the clamping assembly 20 includes a push rod 231, an adjustment assembly 232, a bearing 233 and an elastic member such as a bias spring (not specifically shown in the figure). The push rod 231 includes an adjustment slope 2311. At the loading position, the lifting mechanism (such as a lifting cylinder, not shown) lifts the push rod 231 upward, and as the push rod moves from the initial position (such as a lifting cylinder, not shown) under the action of an external force, the push rod 231 is lifted upward. Figure 6 The bearing 233 moves along the adjustment slope 2311 in the first direction A, for example, to the plane connected to the adjustment slope on the right side, and the adjustment assembly 232 compresses the bias spring and drives the second clamping jaw 24 to move away from the first clamping jaw 22 (such as Figure 5a The clamping assembly 20 is in the open state, which allows the battery to be placed on the tray (or taken out of the tray).

[0034] After the battery is in place on the carbon fiber tray, the lifting head is removed, and the push rod 231 will return to the initial position without external force (such as Figure 6The bearing 233 moves along the adjustment slope 2311 in a second direction B opposite to the first direction A, and the bias spring provides a restoring force to cause the adjustment assembly 232 to drive the second clamping jaw 24 to move toward the first clamping jaw 22 (such as Figure 5b The clamping assembly is in a clamped state, and the battery is pressed to a preset position. During the spring compression process, the batteries in different postures can also be corrected to a uniform posture, ensuring that the batteries can be in a consistent posture during detection, thereby improving the detection precision and accuracy.

[0035] The use of the clamping device for battery detection according to the utility model can not only ensure compatibility with batteries of different sizes and different positioning directions / orientations of batteries, but also allow compatibility with batteries of higher weight due to the carbon fiber tray, thereby improving imaging stability, imaging quality and detection accuracy. When it is combined with X-ray detection equipment and applied to a battery production line, it improves on-site flexibility, enables rapid battery replacement, and greatly improves production efficiency.

[0036] For those skilled in the art, various modifications and variations may be made to the embodiments disclosed above without departing from the scope or spirit of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from the practice of the utility model disclosed in this specification. This specification and the examples disclosed therein should be considered to be illustrative only, and the true scope of the utility model is specified by the appended claims and their equivalents.

Claims

1. A clamping device for battery testing, characterized in that: The clamping device (1) comprises a tray assembly (10) for carrying a battery and a clamping assembly (20) for releasably clamping the battery, wherein the clamping assembly (20) comprises a fixed part and a movable part, and the movable part can be actuated to move in a direction toward or away from the fixed part; wherein the tray assembly (10) comprises an X-ray transparent tray (11), the tray comprising a carrying portion (111), and the carrying portion is designed to allow the battery to be placed on the carrying portion (111) in at least a first orientation and a second orientation, wherein the second orientation is rotated 90° relative to the first orientation.

2. The clamping device according to claim 1, characterized in that: The tray (11) is made of carbon fiber material.

3. The clamping device according to claim 1 or 2, characterized in that: The bearing portion (111) is cross-shaped and has four radially extending portions.

4. The clamping device according to claim 3, characterized in that: The tray assembly (10) further comprises a movable frame (12), and the tray (11) further comprises two mounting plates (112) extending at an angle from two opposite radially extending portions of the four radially extending portions, respectively, and the tray (11) is fixed to the movable frame (12) via the two mounting plates (112).

5. The clamping device according to claim 4, characterized in that: The movable frame (12) is in the shape of a quadrilateral.

6. The clamping device according to claim 3, characterized in that: The fixed part of the clamping assembly (20) includes a mounting seat (21) and a first clamping jaw (22), and the movable part of the clamping assembly (20) includes an adjustment mechanism (23) and a second clamping jaw (24), wherein the second clamping jaw (24) can be actuated to move in a direction toward or away from the first clamping jaw (22).

7. The clamping device according to claim 6, characterized in that: The clamping assembly (20) further comprises a movable base (25), and the mounting base (21) and the adjustment mechanism (23) are fixed to the movable base (25).

8. The clamping device according to claim 6, characterized in that: The first clamping jaw (22) and the second clamping jaw (24) are respectively connected to the mounting seat (21) and the adjustment mechanism (23) in a detachable manner.

9. The clamping device according to claim 8, characterized in that: The adjustment mechanism (23) comprises a push rod (231), an adjustment assembly (232), a bearing (233) and an elastic member, wherein the push rod (231) comprises an adjustment inclined surface (2311); As the push rod (231) moves from the initial position under the action of an external force, the bearing (233) moves along the adjustment inclined surface (2311) in a first direction so that the adjustment component (232) compresses the elastic member and drives the second clamping jaw (24) to move away from the first clamping jaw (22); As the push rod (231) returns to the initial position in the absence of external force, the bearing (233) moves along the adjustment slope (2311) in a second direction opposite to the first direction, and the elastic member provides a restoring force to prompt the adjustment component (232) to drive the second clamping jaw (24) to move toward the first clamping jaw (22).

10. The clamping device according to any one of claims 6 to 9, characterized in that The first clamping jaw (22) and the second clamping jaw (24) are made of rubber material.

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