Thickness measuring and shaping tool for high-efficiency lithium ion naked battery cell

Abstract

The utility model discloses a thickness measuring and shaping tool for a high-efficiency lithium ion bare cell, which relates to the technical field of lithium ion batteries and comprises a support frame, a guide rod mounted at the upper end of the support frame, a plurality of hot pressboards connected onto the guide rod in a sliding manner, a support table mounted at the top end of the guide rod, a cylinder mounted on the support table, and a pressure sensor mounted at the output end of the cylinder. The bottom side of the pressure sensor is installed on the hot pressing plate located on the upper layer, an abutting block and an installation block are installed on the side wall of the alignment side of the hot pressing plate located on the middle layer, a thickness sensor is installed on the installation block, and a first hook and a second hook are installed on the side wall of the alignment side of the hot pressing plate sliding along the guide rod. The first hooks and the second hooks on the adjacent hot pressing plates are matched with each other and lift the hot pressing plates in sequence. According to the utility model, clear test pressure is applied to the hot-pressing plates through the cylinders and the pressure sensors, the two adjacent hot-pressing plates heat and extrude the battery cell, and the thickness of the battery cell is monitored through the abutting blocks and the thickness sensors.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion battery manufacturing monitoring, in particular to a thickness measuring and shaping tool for a high-efficiency lithium ion bare battery cell. Background Art

[0002] Thickness is one of the important parameters of lithium-ion batteries, which greatly affects the assembly of subsequent modules. In actual production, due to differences in environment, humidity, and incoming materials, lithium-ion batteries are prone to being too thick.

[0003] At present, in actual production, most battery manufacturers only test the thickness of battery cells in the post-process stage when the finished battery cells are shipped, which is not conducive to the collection of thickness data, and it is impossible to clarify the specific process of battery cell thickness failure, which has brought great interference to subsequent failure analysis and improvement, and caused great economic losses. In addition, for lithium iron phosphate square aluminum shell batteries, since most of them adopt the winding process, there are more gaps inside the bare battery cells, and after formation, due to the expansion and rebound of the anode electrode, the battery cells are more likely to wrinkle and deform. This causes the data monitored by the vernier caliper to be greatly affected by human factors, the data reliability is low, and the extrusion force is too large, and the bare battery cells are easily damaged by the sharp angle end of the caliper. At the same time, manual sampling inspection operations are laborious, not convenient for large-scale adoption, and the labor cost is high. Therefore, an efficient lithium-ion bare battery cell thickness measurement and shaping tooling is needed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a high-efficiency thickness measuring and shaping tool for lithium-ion bare cells to solve the above-mentioned multiple defects caused by the prior art.

[0005] A thickness measuring and shaping tool for high-efficiency lithium-ion bare cells comprises the following steps: a support frame, guide rods are installed at the four corners of the upper end of the support frame, a plurality of hot pressing plates are slidably connected to the guide rods, a support platform is installed at the top end of the guide rods, a cylinder is installed on the support platform, a pressure sensor is installed at the output end of the cylinder, the bottom side of the pressure sensor is installed on the hot pressing plate located on the upper layer, abutment blocks and mounting blocks are respectively installed on the side walls on the opposite side of the hot pressing plate located on the middle layer, a thickness sensor is installed on the mounting block, a first hook and a second hook are respectively installed on the side walls on the opposite side of the hot pressing plate sliding along the guide rods, the first hooks and the second hooks on adjacent hot pressing plates cooperate with each other and lift the hot pressing plates in turn.

[0006] Preferably, abutment blocks and mounting blocks are respectively installed on one side of the hot pressing plate located at the upper layer and the hot pressing plate located at the bottom layer, and the abutment blocks and mounting blocks on adjacent hot pressing plates are correspondingly arranged.

[0007] Preferably, the hot pressing plate located at the bottom layer abuts against the upper end surface of the support frame.

[0008] Preferably, the upper end surface of the hot pressing plate and a middle position thereof support a battery cell.

[0009] Preferably, the hot pressing plate is capable of heating the battery core.

[0010] The advantages of the utility model are: the utility model applies a clear test pressure to the hot pressing plate through the cylinder and the pressure sensor, the two adjacent hot pressing plates heat and extrude the battery cells, and the thickness of the battery cells is monitored by the abutment block and the thickness sensor. On the one hand, the test tolerance caused by the artificial caliper test can be avoided; on the other hand, the battery cells are shaped by temperature and pressure, which can effectively improve the thickness of the battery cells. The device is detachable and can operate on multiple battery cells at the same time. The whole operation is simple, and the thickness data of a large number of battery cells can be quickly collected. Hot pressing shaping can effectively improve the thickness of the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 , Figure 2 It is a schematic diagram of the structure of the utility model from different perspectives.

[0012] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of A.

[0013] Among them: 1-support frame; 2-guide rod; 3-hot pressing plate; 4-support platform; 5-cylinder; 6-pressure sensor; 7-abutment block; 8-mounting block; 9-thickness sensor; 10-first hook; 11-second hook; 12-battery cell. DETAILED DESCRIPTION

[0014] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0015] like Figures 1 to 3As shown, a thickness measuring and shaping tool for high-efficiency lithium-ion bare cells comprises a support frame 1, guide rods 2 are installed at the four corners of the upper end of the support frame 1, a plurality of hot pressing plates 3 are slidably connected to the guide rods 2, a support platform 4 is installed at the top of the guide rods 2, a cylinder 5 is installed on the support platform 4, a pressure sensor 6 is installed at the output end of the cylinder 5, the bottom side of the pressure sensor 6 is installed on the hot pressing plate 3 located on the upper layer, abutment blocks 7 and mounting blocks 8 are respectively installed on the side walls of the hot pressing plate 3 located on the middle layer on the opposite side, a thickness sensor 9 is installed on the mounting block 8, a first hook 10 and a second hook 11 are respectively installed on the side walls of the hot pressing plate 3 sliding along the guide rods 2, the first hooks 10 and the second hooks 11 on adjacent hot pressing plates 3 cooperate with each other and lift the hot pressing plates 3 in turn. The pressure sensor 6 and the thickness sensor 9 are both electrically connected to the control circuit, and the pressure data and the thickness data are displayed in real time through the display. When the pressure sensor 6 detects that the pressure value reaches the target pressure, the cylinder 5 is closed. The thickness sensor 9 is a contact type. When the abutment block 7 abuts against the thickness sensor 9, the detection end of the thickness sensor 9 produces a deformation displacement, thereby detecting the thickness of the battery cell 12. When the cylinder 5 pushes the hot pressing plate 3 downward, the first hook 10 and the second hook 11 are located at the bottom side. The hook 10 and the second hook 11 are disengaged first, so that the bottom layer of the hot pressing plate 3 and the upper layer of the hot pressing plate 3 are clamped on both sides of the battery cell 12, and the cylinder 5 continues to drive the hot pressing plate 3 to move downward, and the first hook 10 and the second hook 11 are separated one by one from bottom to top, and the battery cell 12 is clamped by the adjacent layers of the hot pressing plate 3. At the same time, when the cylinder 5 drives the hot pressing plate 3 to move upward, the first hook 10 and the second hook 11 are hooked together one by one from top to bottom, and drive the hot pressing plate 3 to separate layer by layer, and then the battery cell 12 is removed to complete the shaping and thickness detection of the battery cell 12.

[0016] In this embodiment, the hot pressing plate 3 located at the upper layer and the hot pressing plate 3 located at the bottom layer are respectively installed with abutment blocks 7 and mounting blocks 8, and the abutment blocks 7 and mounting blocks 8 on adjacent hot pressing plates 3 are correspondingly arranged. The thickness sensor 9 on the mounting block 8 of the next layer cooperates with the abutment block 7 of the adjacent upper layer to detect the thickness of the battery cell 12.

[0017] In this embodiment, the hot pressing plate 3 located at the bottom layer abuts against the upper end surface of the support frame 1. The hot pressing plate 3 located at the bottom layer can be fixedly mounted on the support frame 1 by bolts.

[0018] In this embodiment, the upper end surface of the hot pressing plate 3 and the middle position thereof support the battery core 12 .

[0019] In this embodiment, the hot pressing plate 3 can heat the battery core 12. The hot pressing plate 3 heats and presses the battery core 12, and shapes the battery core 12 through pressure and temperature.

[0020] Specific operation of thickness measuring tool:

[0021] 1. Install appropriate amount of hot pressing plates 3 and thickness sensors 9 as required;

[0022] 2. Place the target battery cell 12 on the hot pressing plate 3, start the hot pressing plate 3, adjust the heating temperature, and set the target test pressure, such as 300Kgf, 500Kgf;

[0023] 3. Start the cylinder 5 to push the pressure sensor 6 and the hot pressing plate 3 with the bottom layer removed to move downward;

[0024] 4. The hot pressing plate 3 is sequentially placed on the upper side of the battery cell 12, and the abutment block 7 abuts against the thickness sensor 8;

[0025] 5. The cylinder 5 applies pressure to the pressure sensor 6 and detects the pressure value through the pressure sensor 6; when the pressure sensor 6 detects that the pressure reaches the target pressure value, the cylinder 5 is closed;

[0026] 6. The thickness of the battery cell 12 under the target pressure is read by the thickness sensor 9 , and the thickness of the battery cell 12 is improved by hot pressing and shaping by the hot pressing plate 3 .

[0027] The utility model applies a clear test pressure to the hot pressing plate 3 through the cylinder 5 and the pressure sensor 6. The two adjacent hot pressing plates 3 heat and extrude the battery cells 12, and monitor the thickness of the battery cells 12 through the abutment block 7 and the thickness sensor 9. On the one hand, the test tolerance caused by the artificial caliper test can be avoided; on the other hand, the battery cells 12 are shaped by temperature and pressure, which can effectively improve the thickness of the battery cells 12. The device is detachable and can operate on multiple battery cells 12 at the same time. The whole operation is simple, and the thickness data of a large number of battery cells 12 can be quickly collected. Hot pressing shaping can effectively improve the thickness of the battery cells 12.

[0028] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the embodiments disclosed above are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A thickness measuring and shaping tool for high-efficiency lithium-ion bare cells, characterized in that: The invention comprises a support frame (1), wherein guide rods (2) are installed at the four corners of the upper end of the support frame (1), and a plurality of hot pressing plates (3) are slidably connected to the guide rods (2), a support platform (4) is installed at the top end of the guide rods (2), a cylinder (5) is installed on the support platform (4), a pressure sensor (6) is installed at the output end of the cylinder (5), the bottom side of the pressure sensor (6) is installed on the hot pressing plate (3) located on the upper layer, abutment blocks (7) and mounting blocks (8) are respectively installed on the side walls of the hot pressing plate (3) located on the middle layer on the opposite side, a thickness sensor (9) is installed on the mounting block (8), a first hook (10) and a second hook (11) are respectively installed on the side walls of the hot pressing plate (3) sliding along the guide rods (2), and the first hooks (10) and the second hooks (11) on adjacent hot pressing plates (3) cooperate with each other and lift the hot pressing plates (3) in sequence.

2. The thickness measuring and shaping tool for a high-efficiency lithium-ion bare battery cell according to claim 1, characterized in that: Abutment blocks (7) and mounting blocks (8) are respectively installed on one side of the hot pressing plate (3) located at the upper layer and the hot pressing plate (3) located at the bottom layer, and the abutment blocks (7) and mounting blocks (8) on adjacent hot pressing plates (3) are arranged correspondingly.

3. The thickness measuring and shaping tool for a high-efficiency lithium-ion bare battery cell according to claim 1, characterized in that: The hot pressing plate (3) located at the bottom layer abuts against the upper end surface of the support frame (1).

4. The thickness measuring and shaping tool for a high-efficiency lithium-ion bare battery cell according to claim 1, characterized in that: The upper end surface of the hot pressing plate (3) and a position located in the middle thereof support a battery core (12).

5. The thickness measuring and shaping tool for a high-efficiency lithium-ion bare battery cell according to claim 4, characterized in that: The hot pressing plate (3) is capable of performing a heating operation on the battery core (12).

Images