Lithium battery pole piece cutting tooling

Abstract

The utility model relates to a kind of lithium battery pole piece cutting tool, including base, adjusting mechanism, pressure mechanism, upper die and lower die, adjusting mechanism is equipped on base, adjusting mechanism connects pressure mechanism;The output end of pressure mechanism connects upper die;The bottom of upper die is replaceably connected with punch;Base is equipped with a bidirectional dovetail groove guide rail, the bottom of lower die is integrated dovetail slider, and dovetail groove guide rail of base is matched sliding;The center of lower die is equipped with a die hole, die hole is used to be opposite to punch to cut pole piece between the both. The utility model is provided with the setting mode of the punch of quick replacement and the lower die of quick replacement, can replace mould more simply, replace cutting specification, improve test efficiency, ensure the accuracy of cutting and the accuracy of test.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery manufacturing equipment technology, and in particular to a lithium battery electrode cutting tool. Background Technology

[0002] With the rapid development of lithium-ion battery technology, people have increasingly higher requirements for the quality of battery cells. In the lithium-ion battery industry, electrodes are an integral part of lithium batteries, divided into positive and negative electrodes. Electrodes mainly consist of active materials, with different materials selected for the positive and negative electrodes. During production, electrodes are typically prepared using a dry method. First, the active material particles are prepared into a slurry, which is then shaped into electrodes using an electrode forming device. After forming, the electrodes need to be rolled using a rolling device to ensure the thickness meets production requirements. During production, quality personnel will test the electrodes for items such as true density. Before testing, the electrodes need to be cut into circular pieces of a certain diameter to facilitate subsequent testing and calculations.

[0003] In the lithium battery production process, the rolled electrode sheets need to be cut into standard round pieces for tests such as true density and compacted density. Traditional cutting methods have significant drawbacks:

[0004] (1) Circular shear cutting: burrs are easily generated at the cutting edge, and the uniformity of the circular pieces cannot be guaranteed;

[0005] (2) Wood board die cutting: The die replacement is cumbersome, the positioning accuracy is poor, and the wood board deforms after long-term use, resulting in the cutting surface tilting.

[0006] These two cutting methods are simple and low-cost, but they can only cut electrode sheets of the same size. Furthermore, the cutting quality is difficult to control, and the precision and smoothness of the cut cannot be guaranteed, affecting the accuracy of testing and calculations. While some existing solutions propose cutting fixtures with guide pillars, their lower die fixing methods are simplistic, requiring bolt removal for die replacement, resulting in low efficiency. Therefore, this invention proposes a lithium battery electrode sheet cutting fixture to solve the problem of inaccurate cutting that affects testing accuracy. Utility Model Content

[0007] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a lithium battery electrode cutting fixture with stable structure, quick mold change and accurate alignment, thus solving the problems of low cutting accuracy and poor efficiency in the prior art.

[0008] The purpose of this utility model is achieved as follows:

[0009] A lithium battery electrode cutting fixture includes a base, an adjustment mechanism, a pressure mechanism, an upper die, and a lower die. The base is provided with an adjustment mechanism, which is connected to the pressure mechanism. The pressure mechanism is connected to the upper die. The lower die is provided below the upper die and is slidably mounted on the base.

[0010] The adjustment mechanism includes a lifting screw and a slider sleeve. The bottom of the lifting screw is located on the left side of the base. A horizontal slider is sleeved on the lifting screw, and a slider sleeve is sleeved on the horizontal slider.

[0011] The slider sleeve has two through holes, one for fitting onto the lifting screw and the other for inserting into the upper die. A pressure mechanism is vertically mounted on the slider of the adjusting mechanism. The output end of the pressure mechanism is connected to the upper die. A punch is replaceably connected to the bottom of the upper die.

[0012] The base is provided with a two-way dovetail groove guide rail on the right side, and the bottom of the lower mold is integrated with a dovetail slider, which matches and slides with the dovetail groove guide rail of the base to realize the movement of the lower mold;

[0013] The lower die has a die hole at its center, which is used to cut the electrode sheet placed between the punch and the punch.

[0014] As a preferred technical solution of this utility model, the pressure mechanism is a pneumatic cylinder or a hydraulic cylinder.

[0015] As a preferred technical solution of this utility model, the upper mold is connected to the output end of the pressure mechanism via a flange.

[0016] As a preferred technical solution of this utility model, a rectangular quick-change slot is provided at the bottom of the upper mold, and a permanent magnet is embedded in the inner side of the slot of the upper mold 4.

[0017] As a preferred technical solution of this utility model, the top of the punch is provided with a steel positioning plate, which is magnetically attached to the slot of the upper die to realize the quick replacement of the punch.

[0018] As a preferred technical solution of this utility model, the cross section of the dovetail groove guide rail is a symmetrical trapezoid with an inclination angle of 50~60°, and limit blocks are provided at both ends to prevent the lower mold from coming out.

[0019] As a preferred technical solution of this utility model, the side of the base is also provided with a locking mechanism, which includes a wing bolt connected to the dovetail slider of the lower mold to lock the position of the lower mold.

[0020] As a preferred technical solution of this utility model, the surface of the lower mold is provided with laser crosshairs, which are aligned with the center of the punch.

[0021] As a preferred technical solution of this utility model, a digital display dial indicator is installed on the side wall of the upper mold to monitor the stamping stroke in real time.

[0022] As a preferred technical solution of this utility model, the outer surface of the lifting screw is provided with a scale.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] This utility model provides a lithium battery electrode cutting fixture, featuring a quick-change punch and a quick-change lower die, enabling easy die replacement and cutting specification changes, improving testing efficiency, and ensuring cutting precision and testing accuracy. It has the following advantages:

[0025] (1) Precise cutting:

[0026] The dovetail groove guide rail eliminates lateral displacement, greatly reducing the diameter tolerance of the cut circular pieces;

[0027] Laser marking combined with a digital dial indicator eliminates human alignment errors and improves accuracy.

[0028] (2) High-efficiency mold changing:

[0029] Magnetic quick-change punches greatly shorten mold changeover time.

[0030] The dovetail slider design of the lower mold supports multi-station pre-installation, and can be directly pushed in for positioning when switching specifications. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model.

[0032] Figure 2 This is the front view of the present invention.

[0033] Figure 3 This is a side view of the present invention.

[0034] In the picture:

[0035] 1. Base; 2. Adjustment mechanism; 2.1. Lifting screw; 2.2. Sliding sleeve; 3. Pressure mechanism; 4. Upper die; 5. Lower die; 6. Punch; 7. Die hole; 8. Dovetail groove guide rail; 9. Locking mechanism. Detailed Implementation

[0036] To better understand the technical solution of this utility model, a detailed description will be provided below in conjunction with relevant illustrations. It should be understood that the specific embodiments described below are not intended to limit the specific implementation of the technical solution of this utility model, but are merely possible implementations of the technical solution of this utility model. It should be noted that the descriptions of the positional relationships of the components herein, such as component A being located above component B, are based on the relative positions of the components in the illustrations and are not intended to limit the actual positional relationships of the components. Example 1

[0037] See Figures 1-3 , Figure 1A schematic diagram of a lithium battery electrode cutting fixture is shown. As shown in the figure, the lithium battery electrode cutting fixture of this embodiment 1 includes a base 1, an adjustment mechanism 2, a pressure mechanism 3, an upper mold 4, and a lower mold 5. The base 1 is provided with the adjustment mechanism 2, which is connected to the pressure mechanism 3. The pressure mechanism 3 is connected to the upper mold 4. The lower mold 5 is provided below the upper mold 4 and is slidably disposed on the base 1.

[0038] The adjustment mechanism 2 includes a lifting screw 2.1 and a slider sleeve 2.2. The bottom of the lifting screw 2.1 is located on the left side of the base 1. A horizontal slider is sleeved on the lifting screw 2.1, and the slider sleeve 2.2 is sleeved on the horizontal slider.

[0039] The slider sleeve 2.2 is provided with two through holes. One through hole is used to fit onto the lifting screw 2.1, and the other through hole is used to insert the upper mold 4. The slider of the adjusting mechanism 2 is vertically mounted with a pressure mechanism 3; the pressure mechanism 3 is a cylinder or a hydraulic cylinder.

[0040] The upper mold 4 is connected to the output end of the pressure mechanism 3 via a flange. A rectangular quick-change slot is provided at the bottom of the upper mold 4, and a permanent magnet is embedded in the inner side of the slot of the upper mold 4.

[0041] The bottom of the upper mold 4 is replaceably connected to a punch 6. The top of the punch 6 is provided with a steel positioning plate, which is magnetically attached to the slot of the upper mold 4 to achieve quick replacement of the punch 6.

[0042] The right side of the base 1 is provided with a bidirectional dovetail groove guide rail 8, and the bottom of the lower mold 5 is integrated with a dovetail slider, which matches and slides with the dovetail groove guide rail 8 of the base 1 to realize the movement of the lower mold 5.

[0043] The dovetail groove guide rail 8 has a symmetrical trapezoidal cross section with an inclination angle of 50~60° and is equipped with limit blocks at both ends to prevent the lower mold 5 from coming out.

[0044] The lower die 5 has a die hole 7 at its center, which is used to cut the electrode sheet placed between the punch 6.

[0045] The base 1 is also provided with a locking mechanism 9 on its side. The locking mechanism 9 includes a wing bolt, which is connected to the dovetail slider of the lower mold 5 and is used to lock the position of the lower mold 5.

[0046] In this embodiment, the surface of the lower mold 5 is provided with laser crosshairs, which are aligned with the center of the punch 6.

[0047] In this embodiment, a digital dial indicator is installed on the side wall of the upper mold 4 to monitor the stamping stroke in real time.

[0048] In this embodiment, the dovetail groove inclination angle of the dovetail groove guide rail 8 is set to 55°, which improves the impact resistance and extends the service life to more than 200,000 cycles.

[0049] In this embodiment, the outer surface of the lifting screw 2.1 is provided with a scale, and the lifting screw scale can achieve ±0.1mm level height repeatability positioning.

[0050] Working principle:

[0051] This utility model provides a lithium battery electrode cutting fixture, which features simple structure, convenient operation, time-saving and high efficiency, good versatility, wide applicability, and low manufacturing cost. The cutting operation process is as follows:

[0052] 1. Mold changing stage:

[0053] Press down the upper die spring pin and remove the old punch;

[0054] Magnetically fix the new punch to the slot;

[0055] Push the corresponding lower mold along the dovetail groove guide rail and tighten the wing bolts.

[0056] 2. Alignment Phase:

[0057] Adjust the lifting screw to align the center of the laser marking line with the punch;

[0058] The stamping stroke was set to 2.0 mm (electrode thickness 1.0 mm) using a digital dial indicator.

[0059] 3. Cutting stage:

[0060] The electrode is placed on the surface of the lower mold;

[0061] The pressure mechanism is activated, and the punch descends through the electrode sheet and enters the die hole to complete the cutting.

[0062] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model. All technical solutions formed by equivalent transformations or equivalent substitutions fall within the scope of protection of this utility model.

Claims

1. A lithium battery electrode cutting fixture, characterized in that: It includes a base (1), an adjustment mechanism (2), a pressure mechanism (3), an upper mold (4) and a lower mold (5). The base (1) is provided with an adjustment mechanism (2), which is connected to the pressure mechanism (3). The pressure mechanism (3) is connected to the upper mold (4). The lower mold (5) is provided below the upper mold (4). The lower mold (5) is slidably disposed on the base (1). The adjustment mechanism (2) includes a lifting screw (2.1) and a slider sleeve (2.2). The bottom of the lifting screw (2.1) is located on the left side of the base (1). A horizontal slider is sleeved on the lifting screw (2.1), and a slider sleeve (2.2) is sleeved on the horizontal slider. The slider sleeve (2.2) is provided with two through holes. One through hole is used to fit on the lifting screw (2.1), and the other through hole is used to insert the upper mold (4). A pressure mechanism (3) is vertically installed on the slider of the adjusting mechanism (2). The output end of the pressure mechanism (3) is connected to the upper mold (4). A punch (6) can be replacedly connected to the bottom of the upper mold (4). The base (1) is provided with a bidirectional dovetail groove guide rail (8) on the right side. The bottom of the lower mold (5) is integrated with a dovetail slider, which matches and slides with the dovetail groove guide rail (8) of the base (1) to realize the movement of the lower mold (5). The lower die (5) has a die hole (7) at its center, which is used to cut the electrode sheet placed between the punch (6) and the punch (6).

2. The lithium battery electrode cutting fixture according to claim 1, characterized in that: The pressure mechanism (3) is a pneumatic cylinder or a hydraulic cylinder.

3. The lithium battery electrode cutting fixture according to claim 1, characterized in that: The upper mold (4) is connected to the output end of the pressure mechanism (3) via a flange.

4. The lithium battery electrode cutting fixture according to claim 1, characterized in that: The bottom of the upper mold (4) is provided with a rectangular quick-change slot, and a permanent magnet is embedded in the inner side of the slot of the upper mold (4).

5. The lithium battery electrode cutting fixture according to claim 4, characterized in that: The top of the punch (6) is provided with a steel positioning plate, which is magnetically attached to the slot of the upper mold (4) to realize the quick replacement of the punch (6).

6. The lithium battery electrode cutting fixture according to claim 1, characterized in that: The dovetail groove guide rail (8) has a symmetrical trapezoidal cross section with an inclination angle of 50~60° and is equipped with limit blocks at both ends to prevent the lower mold (5) from coming out.

7. The lithium battery electrode cutting fixture according to claim 1, characterized in that: The base (1) is also provided with a locking mechanism (9) on its side. The locking mechanism (9) is connected to the dovetail slider of the lower mold (5) and is used to lock the position of the lower mold (5).

8. The lithium battery electrode cutting fixture according to claim 1, characterized in that: The surface of the lower die (5) is provided with laser crosshairs, which are aligned with the center of the punch (6).

9. The lithium battery electrode cutting fixture according to claim 1, characterized in that: A digital dial indicator is installed on the side wall of the upper die (4) to monitor the stamping stroke in real time.

10. The lithium battery electrode cutting fixture according to claim 1, characterized in that: The outer surface of the lifting screw (2.1) is provided with a scale.

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