Device for compounding lithium strip

Abstract

The utility model provides a device for compounding a lithium strip, which is mainly used for compounding and positioning a lithium-copper composite strip and a wound battery cell, and comprises a positioning mechanism and a rubberizing mechanism, the lithium-copper composite strip and the battery cell are sequentially placed in a limiting groove of the positioning mechanism during compounding, and the rubberizing mechanism is used for rubberizing the lithium-copper composite strip and the battery cell. Then a shaping plate on the positioning mechanism is manually closed, so that the lithium-copper composite belt can be attached to the battery cell, then the adhesive tape is pulled to the corresponding scale of a scale plate and then wound below the battery cell to be fixed at one end, then the adhesive tape is cut off at the corresponding position of a cutting roller, and the positioning roller is clockwise rotated to enable the adhesive tape extending out of the lower portion of the battery cell to be attached to the bottom of the battery cell; and finally, taking down the battery cell, and manually smoothing the residual adhesive tape to the back surface of the battery cell to complete lithium strip compounding. At the moment, the joint on the adhesive tape is adhered to the cutting roller for next use. By adopting the device, the lithium-copper composite belt can be effectively and quickly compounded with the wound battery cell, and the consistency of the compounded battery cell can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a device for lithium strip compounding. Background Art

[0002] At present, with the growing demand for lithium-ion batteries, the energy density and cycle life of lithium-ion batteries are being improved. Therefore, various lithium-replenishing technologies in batteries are being explored and verified. One of the pre-lithiation technologies for wound batteries is to wrap the cut lithium-copper composite tape on the surface of the wound battery. The lithium-copper composite tape pole ear corresponds to the position of the battery negative pole ear, and is fixed with tape after compounding. If manual compounding and gluing are used, it may be difficult to align the pole ears and cause the lithium-copper composite tape to shift on the core. Different positions of the tape may also affect the pre-lithiation effect, resulting in poor consistency of the pre-lithiation battery. Utility Model Content

[0003] In order to solve the technical problems existing in the background technology, the utility model proposes a device for lithium strip compounding.

[0004] The utility model provides a device for lithium strip compounding, comprising parallel platforms, with brackets installed at the bottoms of both sides of the platforms, and also comprising a tape sticking mechanism and a positioning mechanism;

[0005] The tape applying mechanism is installed on the platform and the bracket, and is used to provide tape to the battery cell;

[0006] The positioning mechanism is installed on the top of the platform and is used to position the battery core.

[0007] Preferably, the tape attaching mechanism comprises a tape unloading shaft, a tape positioning roller and a cutting roller, the two groups of brackets are provided with openings for fixing the tape unloading shaft, and the axis of the tape unloading shaft is parallel to the plane where the platform is located;

[0008] One side of the platform has a mounting frame protruding from the platform for fixing an adjusting positioning roller and a cutting roller. The axes of the adjusting positioning roller and the cutting roller are parallel to the axis of the tape unwinding shaft. The cutting roller is located between the tape positioning roller and the tape unwinding shaft.

[0009] Preferably, the mounting frame is provided with a first waist-shaped hole in the vertical direction for adjusting and positioning the tape positioning roller in the vertical direction, and the mounting frame is also provided with a second waistline hole in the horizontal direction for adjusting and positioning the cutting roller in the horizontal direction.

[0010] Preferably, the positioning mechanism includes a shaping plate and a positioning block, the shaping plate is U-shaped, the planes of the two vertical parts of the shaping plate are parallel to each other and perpendicular to the axis of the tape unloading shaft, and the positioning block is installed on the platform and located on both sides of the two end faces of the shaping plate.

[0011] Preferably, the shaping plate is composed of at least two materials, a combination of a flexible material and a hard material. When the shaping plate is unfolded, the hard material in the area corresponding to the rounded corners of the battery cell is serrated. When compounded, the area corresponding to the rounded corners of the battery cell is compressed into an arc shape to fit the rounded corners of the battery cell. The combination of the two materials includes but is not limited to connection with adhesion or fasteners.

[0012] Preferably, the mounting bracket is located at an end surface of the shaping plate, and a boss is provided at a horizontal position on a positioning block on a side away from the mounting bracket, and a scale plate is provided on the boss for measuring the stretched length of the tape.

[0013] Preferably, a tape slot is provided on the platform for tape sticking.

[0014] Preferably, the tape positioning roller and the cutting roller are provided with a plurality of groups of transverse grooves for cutting the tape.

[0015] Preferably, the cutting roller can only rotate clockwise along the central axis direction, so as to fix the initial position of the tape after the tape is cut.

[0016] The utility model proposes a device for lithium ribbon compounding. When in use, the lithium ribbon and the winding core are placed on the platform of the bracket in sequence, and then the shaping plate is slowly closed to achieve the bonding of the lithium ribbon and the battery cell. At this time, the lithium ribbon pole ear is aligned with the negative pole ear of the battery cell, and then the adhesive tape is pulled to achieve the fixation of the lithium ribbon on the winding core. The device can quickly achieve standardized compounding of the lithium ribbon and the winding core, ensuring the consistency of the relative position of the lithium ribbon on the battery cell and the consistency of the adhesive tape sticking position, thereby greatly increasing the consistency of the pre-lithium battery cell while improving production efficiency.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the utility model after positioning the battery cell;

[0020] Figure 3 It is a top view of the structure of the utility model;

[0021] Figure 4It is a structural schematic diagram of the shaping plate in the utility model.

[0022] Explanation of the numbers in the figure: 1. Platform; 2. Bracket; 3. Tape unloading shaft; 4. Tape roll; 5. Tape positioning roller; 6. Cutting roller; 7. Positioning block; 8. Shaping plate; 9. Tape notch; 10. Scale plate. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] like Figure 1-Figure 4 A device for lithium strip compounding shown includes parallel platforms, with brackets installed at the bottom of both sides of the platforms, and also includes a tape sticking mechanism and a positioning mechanism;

[0025] The tape applying mechanism is installed on the platform and the bracket, and is used to provide tape to the battery cell;

[0026] The positioning mechanism is installed on the top of the platform and is used to position the battery core.

[0027] Preferably, the tape attaching mechanism comprises a tape unloading shaft, a tape positioning roller and a cutting roller, and the two groups of brackets are provided with openings for fixing the tape unloading shaft, and the axis of the tape unloading shaft is parallel to the plane where the platform is located;

[0028] One side of the platform has a mounting frame protruding from the platform for fixing an adjusting positioning roller and a cutting roller. The axes of the adjusting positioning roller and the cutting roller are parallel to the axis of the tape unwinding shaft. The cutting roller is located between the tape positioning roller and the tape unwinding shaft.

[0029] Preferably, the mounting frame is provided with a first waist-shaped hole in the vertical direction for adjusting and positioning the tape positioning roller in the vertical direction, and the mounting frame is also provided with a second waistline hole in the horizontal direction for adjusting and positioning the cutting roller in the horizontal direction.

[0030] Preferably, the positioning mechanism includes a shaping plate and a positioning block, the shaping plate is U-shaped, the planes of the two vertical parts of the shaping plate are parallel to each other and perpendicular to the axis of the tape unloading shaft, and the positioning block is installed on the platform and located on both sides of the two end faces of the shaping plate.

[0031] Preferably, the shaping plate is composed of at least two materials, a combination of a flexible material and a hard material. When the shaping plate is unfolded, the hard material in the area corresponding to the rounded corners of the battery cell is serrated. When compounded, the area corresponding to the rounded corners of the battery cell is compressed into an arc shape to fit the rounded corners of the battery cell. The combination of the two materials includes but is not limited to connection with adhesion or fasteners.

[0032] The shaping board is composed of a flexible leather material and a hard PP material. The PP material is adhered to the leather material, and the central area is fixed at a corresponding position of the support platform.

[0033] Preferably, the mounting bracket is located at an end surface of the shaping plate, and a boss is provided at a horizontal position on a positioning block on a side away from the mounting bracket, and a scale plate is provided on the boss for measuring the stretched length of the tape.

[0034] Preferably, a tape slot is provided on the platform for tape sticking.

[0035] Preferably, the tape positioning roller and the cutting roller are provided with a plurality of groups of transverse grooves for cutting the tape.

[0036] Preferably, the cutting roller can only rotate clockwise along the central axis direction, so as to fix the initial position of the tape after the tape is cut.

[0037] The tape roll is inserted into the tape unloading shaft and fixed under the platform. When in use, the height of the tape positioning roller is adjusted to be consistent with the height of the upper side of the composite roll core. The stretched tape is sequentially passed around the cutting roller and the tape positioning roller until it reaches the specified scale position on the positioning block boss. Then the tape is pressed down to make it adhere to the joint of the lithium tape. The top of the tape is passed through the notch on the shaping plate and the bracket platform and is wrapped around the bottom of the composite roll core for adhesion and fixation. The tape is cut at the corresponding slot on the cutting roller. The tape positioning roller is rotated clockwise to make the end tape adhere to the lower end of the composite battery cell. The tape is then smoothed along the notch to the bottom of the composite roll core to complete the fixation of the lithium tape. At this time, the initial position of the tape on the tape roll is pasted on the cutting roller to facilitate the composite of the next battery cell, ensuring that the relative position of the lithium tape on the battery cell is consistent and the tape pasting position is consistent, thereby greatly increasing the consistency of the pre-lithium battery cell while improving production efficiency.

[0038] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] 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.

[0041] 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.

[0042] 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 device for lithium strip compounding, comprising platforms (1) placed in parallel, with brackets (2) installed at the bottom of both sides of the platform (1), characterized in that: It also includes a taping mechanism and a positioning mechanism; The adhesive tape applying mechanism is installed on the platform (1) and the bracket (2) and is used to provide adhesive tape to the battery cell; The positioning mechanism is installed on the top of the platform (1) and is used to position the battery cell; The tape attaching mechanism comprises a tape unloading shaft (3), a tape positioning roller (5) and a cutting roller, the two sets of brackets (2) are provided with openings for fixing the tape unloading shaft (3), and the axis of the tape unloading shaft (3) is parallel to the plane where the platform (1) is located; One side of the platform (1) has a mounting frame protruding from the platform (1) and used to fix an adjusting positioning roller and a cutting roller, wherein the axes of the adjusting positioning roller and the cutting roller are both parallel to the axis of the tape unwinding shaft (3), and the cutting roller is located between the tape positioning roller (5) and the tape unwinding shaft (3); The mounting frame is provided with a first waist-shaped hole in the vertical direction for adjusting and positioning the tape positioning roller (5) in the vertical direction, and the mounting frame is also provided with a second waistline hole in the horizontal direction for adjusting and positioning the cutting roller in the horizontal direction; The positioning mechanism comprises a shaping plate (8) and a positioning block (7); the shaping plate (8) is U-shaped; the planes of the two vertical parts of the shaping plate (8) are parallel to each other and perpendicular to the axis of the tape unwinding shaft (3); the positioning block (7) is mounted on the platform (1) and is located on both sides of the two end faces of the shaping plate (8).

2. The device for lithium strip compounding according to claim 1, characterized in that: The shaping plate (8) is composed of at least two materials, a combination of a flexible material and a hard material. When the shaping plate (8) is unfolded, the hard material in the area corresponding to the rounded corner of the battery cell is serrated. When the shaping plate (8) is combined, the area corresponding to the rounded corner of the battery cell is compressed into an arc shape to fit the rounded corner of the battery cell. The combination of the two materials includes but is not limited to connection with adhesive or fasteners.

3. The device for lithium strip compounding according to claim 1, characterized in that: The mounting frame is located at an end surface of the shaping plate (8), and a boss is provided at a horizontal position on a positioning block (7) on a side away from the mounting frame. The boss is provided with a scale plate (10) for measuring the stretched length of the adhesive tape.

4. The device for lithium strip compounding according to claim 1, characterized in that: The platform (1) is provided with a tape notch (9) for adhesive tape sticking.

5. The device for lithium strip compounding according to claim 1, characterized in that: The adhesive tape positioning roller (5) and the cutting roller are provided with a plurality of groups of transverse slots for cutting the adhesive tape.

6. The device for lithium strip compounding according to claim 1, characterized in that: The cutting roller can only rotate clockwise along the direction of its central axis.

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