Lithium battery cell flattening device

Abstract

The utility model discloses a flattening device for a lithium battery cell. The flattening device comprises a base, a support frame, a bottom plate, a pressing plate and a pressing cylinder, the bottom plate and the support frame are both mounted on the base, and the support frame and the base are matched to form a cell flattening processing space; the pressing cylinder is mounted on the support frame, and a piston rod of the pressing cylinder extends into the cell flattening processing space; the lower pressing plate is connected with the piston rod and is arranged above the bottom plate; a battery cell inlet, an electrode channel and a battery cell outlet are formed in the side surface of the support frame; the electrode channel is horizontally arranged, two ends of the electrode channel are respectively communicated with the cell inlet and the cell outlet, and the width of the electrode channel is slightly greater than the thickness of the electrode; and the battery cell outlet is over against the flattening processing position of the battery cell. The battery cell inlet is circular, the diameter of the circle is slightly larger than that of the circular section of the cylindrical battery cell, or the battery cell inlet and the lower pressing plate are arranged in a staggered manner. According to the utility model, the conditions of finger pressing and positive and negative electrode bending or breaking can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery processing equipment, in particular to a lithium battery cell flattening device. Background Art

[0002] A lithium battery is a battery with lithium metal or lithium alloy as the positive / negative electrode material and using a non-aqueous electrolyte solution. Its shape can be divided into rectangular or cylindrical. The rectangular lithium battery includes a rectangular outer shell and a rectangular lithium battery (rolled) cell. The lithium battery cell is initially cylindrical, then placed in a flattening device for flattening treatment, and then installed in the rectangular outer shell.

[0003] The existing flattening device only includes a bottom plate, a lower pressing plate placed above the bottom plate, and a lower pressing cylinder. During the flattening process, the worker places the cylindrical lithium battery cell on the bottom plate, and the lower pressing cylinder drives the lower pressing plate to press down, so as to cooperate with the bottom plate to flatten the lithium battery cell. However, when using the flattening device with such a structure for flattening processing, there is a safety hazard of pinching fingers, and it is easy to bend or break the positive and negative electrodes, affecting the performance of the cell or causing the cell to be unusable. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a lithium battery cell flattening device. To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0005] A lithium battery cell flattening device includes a base, a support frame, a bottom plate, a lower pressing plate, and a lower pressing cylinder;

[0006] The bottom plate and the support frame are both installed on the base, and the support frame and the base cooperate to form a cell flattening processing space;

[0007] The lower pressing cylinder is installed on the support frame, and its piston rod extends into the cell flattening processing space;

[0008] The lower pressing plate is connected to the piston rod and is arranged above the bottom plate;

[0009] An electrode inlet, an electrode channel, and an electrode outlet are formed on the side surface of the support frame;

[0010] The electrode channel is horizontally arranged, and its two ends are respectively communicated with the electrode inlet and the electrode outlet, and the width of the electrode channel is slightly larger than the thickness of the electrode;

[0011] The electrode outlet is directly opposite to the position where the cell is flattened.

[0012] In this technical solution, the worker holds the positive and negative electrodes of the battery cell, inserts the main body of the battery cell into the battery cell inlet, and moves it in the direction of battery cell flattening processing; during the movement, the positive and negative electrode parts are located in the electrode channel and move along the electrode channel. Limited by the electrode channel, when the main body of the battery cell moves to the position of battery cell flattening processing, the positive and negative electrodes are both in a horizontal state. Therefore, when the pressing cylinder drives the lower pressing plate to press down and cooperate with the bottom plate to flatten the lithium battery cell, the positive and negative electrodes will not be bent or broken, ensuring the performance of the battery cell.

[0013] Further, the battery cell outlet is rectangular; the length of the rectangle is slightly greater than the length of the major axis of the elliptical cross-section after the battery cell is flattened, and the width of the rectangle is slightly greater than the length of the minor axis of the elliptical cross-section after the battery cell is flattened.

[0014] Further, the battery cell inlet is circular, and the diameter of the circle is slightly larger than the diameter of the circular cross-section of the cylindrical battery cell, which can prevent the fingers holding the battery cell from entering the battery cell flattening processing space and avoid the situation of pressing the fingers.

[0015] Further, the battery cell inlet and the lower pressing plate are arranged in a dislocation manner, so that even if the fingers holding the battery cell enter the battery cell flattening processing space, the situation of pressing the fingers will not occur.

[0016] Further, a guiding part is provided between the battery cell inlet and the electrode channel, reducing the difficulty of the positive and negative electrodes moving from the battery cell inlet to the electrode channel.

[0017] Further, a limiting structure facing the battery cell inlet is provided in the battery cell flattening processing space. When the main body of the battery cell is inserted into the battery cell inlet while holding the positive and negative electrodes of the battery cell by hand, the limiting structure resists the main body of the battery cell to prevent the main body of the battery cell from extending too far.

[0018] Further, the limiting structure includes a limiting member, and the limiting member is connected to the base.

[0019] Further, the base is provided with an adjustment groove;

[0020] The limiting member is matched with the adjustment groove through a bolt assembly to adjust the distance between it and the battery cell inlet, so that the limiting member adapts to the main bodies of battery cells with different lengths.

[0021] Further, it also includes a guiding column;

[0022] The top of the support frame is provided with through holes on both sides of the pressing cylinder and guiding tubes located on the through holes;

[0023] The guiding column is inserted into the corresponding guiding tube, passes through the corresponding through hole, and is connected to the lower pressing plate, improving the stability of the pressing cylinder driving the lower pressing plate to lift and lower.

[0024] Furthermore, level adjustment feet are provided at the four corners of the bottom of the base for adjusting the levelness of the entire flattening device.

[0025] Compared with the prior art, the principles and advantages of this technical solution are as follows:

[0026] 1. The worker holds the positive and negative electrodes of the battery cell, inserts the main body of the battery cell into the entrance of the battery cell, and moves it in the direction of the battery cell flattening process; during the movement, part of the positive and negative electrodes are placed in the electrode channel and move along the electrode channel. The electrode channel limits the main body of the battery cell, so that when the positive and negative electrodes are moved to the position of the battery cell flattening process, the positive and negative electrodes are in a horizontal state, so that the downward pressure cylinder drives the downward pressure plate to press down, and cooperates with the bottom plate to flatten the lithium battery cell without bending or breaking the positive and negative electrodes, thereby ensuring the performance of the battery cell.

[0027] 2. The entrance of the battery cell is circular, and the diameter of the circle is slightly larger than the diameter of the circular cross-section of the cylindrical battery cell, which can prevent the fingers holding the battery cell from entering the battery cell flattening processing space and avoid pressing the fingers.

[0028] 3. In addition to the above method, the battery cell entrance and the lower pressure plate are staggered, so that even if the fingers holding the battery cell enter the battery cell flattening processing space, the fingers will not be pressed.

[0029] 4. A limit structure facing the cell entrance is provided in the cell flattening processing space. When the positive and negative electrodes of the cell are held in the hand and the main body of the cell is inserted into the cell entrance, the limit structure resists the main body of the cell to prevent the main body of the cell from being inserted too far. Even an inexperienced worker can grasp the depth of the main body of the cell inserted into the cell entrance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the services required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 This is one of the structural schematic diagrams of a lithium battery cell flattening device according to the first embodiment of the utility model;

[0032] Figure 2 This is a second structural schematic diagram of a lithium battery cell flattening device according to the first embodiment of the utility model;

[0033] Figure 3 This is a schematic diagram of a limiting structure in a lithium battery cell flattening device according to an embodiment of the present invention ( Figure 2is the back side);

[0034] Figure 4 This is a schematic diagram when the battery cell extends into the battery cell inlet in the first embodiment of the present invention (the fingers holding the positive and negative electrodes are omitted);

[0035] Figure 5 This is a schematic diagram when the positive and negative electrode parts are located in the electrode channels in the first embodiment of the present invention (the main body of the battery cell moves in the direction of the battery cell flattening process, and the fingers holding the positive and negative electrodes are omitted);

[0036] Figure 6 This is a schematic diagram when the main body of the battery cell has moved to the position of the battery cell flattening process in the first embodiment of the present invention (the fingers holding the positive and negative electrodes are omitted).

[0037] Reference numerals:

[0038] 1 - Base; 2 - Support frame; 3 - Bottom plate; 4 - Lower pressing plate; 5 - Lower pressing cylinder; 6 - Battery cell flattening processing space; 7 - Battery cell inlet; 8 - Electrode channel; 9 - Battery cell outlet; 10 - Guide part; 11 - Limiting part; 12 - Adjusting groove; 13 - Guide post; 14 - Guide tube; 15 - Horizontal adjusting foot. Detailed implementation manners

[0039] The present invention will be further described below in conjunction with two specific implementation manners:

[0040] Embodiment 1

[0041] As Figures 1 to 6 shown, a lithium battery cell flattening device described in this embodiment includes a base 1, a support frame 2, a bottom plate 3, a lower pressing plate 4, a lower pressing cylinder 5, and a guide post 13.

[0042] Among them,

[0043] Four corners of the bottom of the base 1 are provided with horizontal adjusting feet 15 for adjusting the levelness of the entire flattening device.

[0044] The bottom plate 3 and the support frame 2 are both installed on the base 1, and the support frame 2 and the base 1 cooperate to form a battery cell flattening processing space 6.

[0045] The lower pressing cylinder 5 is installed on the support frame 2, and its piston rod extends into the battery cell flattening processing space 6.

[0046] The lower pressing plate 4 is connected to the piston rod and is arranged above the bottom plate 3.

[0047] The top of the support frame 2 is provided with through holes located on both sides of the downward pressure cylinder 5, and a guide tube 14 is provided on the through holes; the guide column 13 is inserted into the corresponding guide tube 14, and passes through the corresponding through hole, and is connected to the downward pressure plate 4, so as to improve the stability of the downward pressure cylinder 5 driving the downward pressure plate 4 to rise and fall; in addition, the side of the support frame 2 is provided with a battery cell inlet 7, an electrode channel 8, and a battery cell outlet 9.

[0048] The electrode channel 8 is arranged horizontally, and its two ends are respectively connected to the battery cell inlet 7 and the battery cell outlet 9, and the width of the electrode channel 8 is slightly larger than the thickness of the electrode.

[0049] The battery cell outlet 9 is directly opposite to the position where the battery cell is flattened.

[0050] Specifically, in this embodiment,

[0051] The battery cell outlet 9 is a rectangle; the length of the rectangle is slightly larger than the length of the major axis of the elliptical cross section after the battery cell is flattened, and the width of the rectangle is slightly larger than the length of the minor axis of the elliptical cross section after the battery cell is flattened.

[0052] The cell inlet 7 and the lower pressing plate 4 are arranged in a staggered manner.

[0053] A guide portion 10 is provided between the cell inlet 7 and the electrode channel 8 .

[0054] A limiting structure facing the battery cell entrance 7 is provided in the battery cell flattening processing space 6, and the limiting structure includes a limiting member 11 and an adjustment groove 12; the adjustment groove 12 is provided on the base 1; the limiting member 11 cooperates with the adjustment groove 12 through a bolt assembly to adjust the distance between the limiting member 11 and the battery cell entrance 7, so that the limiting member 11 can adapt to battery cell bodies of different lengths.

[0055] The working principle of this embodiment is as follows:

[0056] When performing the cell flattening process, the worker holds the positive and negative electrodes of the cell, inserts the main body of the cell into the cell inlet 7, and moves in the direction of the cell flattening process;

[0057] When the main body of the battery cell is inserted into the battery cell entrance 7 , the limiting member 11 of the limiting structure resists the main body of the battery cell to prevent the main body of the battery cell from being inserted too far. Even an inexperienced worker can grasp the depth of the main body of the battery cell inserted into the battery cell entrance 7 .

[0058] The cell inlet 7 and the lower pressing plate 4 are arranged in a staggered manner, so that even if the fingers holding the cell enter the cell flattening processing space 6, the fingers will not be pressed.

[0059] When the positive and negative electrodes of the battery cell pass through the connection between the battery cell inlet 7 and the electrode channel 8 , the cooperation of the guide portion 10 can reduce the difficulty of moving the positive and negative electrodes from the battery cell inlet 7 to the electrode channel 8 .

[0060] When the positive and negative electrode parts are located in the electrode channel 8 and move along the electrode channel 8, they are restricted by the electrode channel 8. When the main body of the battery cell moves to the position for flattening the battery cell, the positive and negative electrodes are both in a horizontal state. Therefore, when the downward pressing cylinder 5 drives the downward pressing plate 4 to press downwards and cooperate with the bottom plate 3 to flatten the lithium battery cell, the positive and negative electrodes will not be bent or broken, ensuring the performance of the battery cell.

[0061] The main body of the battery cell is taken out from the battery cell outlet 9 after the flattening operation.

[0062] Embodiment 2

[0063] Compared with Embodiment 1, the battery cell inlet 7 is circular, and the diameter of this circle is slightly larger than the diameter of the circular cross-section of the cylindrical battery cell. In this embodiment, it is also possible to prevent the fingers holding the battery cell from entering the battery cell flattening processing space 6, avoiding the situation of pressing the fingers.

[0064] The above-described embodiments are only the preferred embodiments of the present invention, and do not limit the scope of implementation of the present invention. Therefore, all changes made according to the shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A lithium battery cell flattening device, characterized in that, It includes a base, a support frame, a bottom plate, a lower pressing plate, and a lower pressing cylinder; Both the bottom plate and the support frame are installed on the base, and the support frame cooperates with the base to form a processing space for flattening the battery cell; The lower pressing cylinder is installed on the support frame, and its piston rod extends into the processing space for flattening the battery cell; The lower pressing plate is connected to the piston rod and is arranged above the bottom plate; The side of the support frame is provided with a battery cell inlet, an electrode channel, and a battery cell outlet; The electrode channel is horizontally arranged, and its two ends are respectively communicated with the battery cell inlet and the battery cell outlet, and the width of the electrode channel is slightly larger than the thickness of the electrode; The battery cell outlet is opposite to the position where the battery cell is flattened; 2. The flattening device for a lithium battery cell according to claim 1, wherein, The battery cell outlet is rectangular; the length of the rectangle is slightly larger than the length of the major axis of the elliptical cross-section after the battery cell is flattened, and the width of the rectangle is slightly larger than the length of the minor axis of the elliptical cross-section after the battery cell is flattened; 3. A lithium battery cell flattening device according to claim 2, characterized in that, The battery cell inlet is circular, and the diameter of the circle is slightly larger than the diameter of the circular cross-section of the cylindrical battery cell; 4. The flattening device for a lithium battery cell according to claim 2, wherein, The battery cell inlet is arranged in a staggered manner with the lower pressing plate; 5. A lithium battery cell flattening device according to claim 3 or 4, characterized in that, A guiding part is arranged between the battery cell inlet and the electrode channel; 6. A lithium battery cell flattening device according to claim 3 or 4, characterized in that, A limiting structure facing the battery cell inlet is arranged in the processing space for flattening the battery cell; 7. A lithium battery cell flattening device according to claim 6, characterized in that, The limiting structure includes a limiting part, and the limiting part is connected to the base; 8. A lithium battery cell flattening device according to claim 7, characterized in that, The base is provided with an adjustment groove; The limiting part is matched with the adjustment groove through a bolt assembly to adjust the distance between it and the battery cell inlet; 9. A lithium battery cell flattening device according to claim 3 or 4, characterized in that, It further includes a guiding column; Through holes located on both sides of the lower pressing cylinder are opened at the top of the support frame, and guiding tubes are arranged on the through holes; The guiding column is inserted into the corresponding guiding tube, passes through the corresponding through hole, and is connected to the lower pressing plate; 10. A lithium battery cell flattening device according to claim 3 or 4, characterized in that, Horizontal adjusting feet are arranged at the four corners of the bottom of the base.

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