Device for stably measuring thickness of laminated battery

Abstract

The utility model relates to the technical field of battery thickness measurement, in particular to a device for stably measuring the thickness of a laminated battery, which comprises four groups of device support frames, a support plate fixedly welded at the top of the device support frames is arranged above the device support frames, and the thickness of the laminated battery is measured by the support plate. A battery placing module is arranged among the four groups of device supporting frames, the battery placing module comprises a placing platform for placing a laminated battery, the placing platform is located under the supporting plate, and an electric cylinder corresponding to the placing platform is fixedly arranged above the supporting plate; the lower end of the electric cylinder is provided with a counterweight pressure system which is connected with the electric cylinder and controlled by the electric cylinder, the thickness of the battery can be automatically measured in a low-pressure environment through the counterweight pressure system, and compared with a traditional mechanism which depends on servo connection, the repeated measurement precision is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of battery thickness measurement, in particular to a device for stably measuring the thickness of a laminated battery. Background Art

[0002] A laminated battery is a type of automotive lithium battery that uses a lamination process. The principle is to stack multiple battery cells of the same specification together to form a battery pack to increase the total voltage and capacity of the battery. The thickness measurement of laminated batteries is an important part of the battery manufacturing and quality control process. Accurate thickness measurement is essential to ensure battery performance, safety and life. When measuring the thickness of laminated batteries, professional measuring tools or equipment are usually used, such as a thickness gauge or a microscope, and the battery thickness needs to be measured under a certain pressure. When measuring the battery thickness under low pressure, the surface of the battery cannot be completely flat due to the presence of electrolyte inside the battery, and irregular bulging occurs on the plane of the laminated battery, resulting in unstable values ​​of the measurement sensor and failure to achieve high-precision repeated measurements.

[0003] At present, a Chinese patent with publication number CN216679113U discloses a device for detecting the thickness of laminated batteries, which includes a transmission mechanism and a detection mechanism. The transmission mechanism includes a frame, a conveyor belt, a support, a threaded rod, a movable seat, an electric push rod and a motor. The conveyor belt is fixed on the surface of the frame and is loosely matched with the frame. The support is fixed on the surface of the frame. Both ends of the threaded rod are rotatably connected to the surface of the support. The transmitting part and the receiving part are symmetrically fixed on the surface of the bracket respectively. The second motor is fixed on one side of the support. A shift rod is installed at the output end of the second motor, and the shift rod is loosely matched with the surface of the conveyor belt.

[0004] Although this stacked battery thickness measuring device can continuously measure the thickness of the battery and classify the batteries that do not meet the standards, this device is accompanied by a transportation structure for battery classification and processing, which is large in size and has a complicated structure other than the detection function. It is impossible to place the entire set of equipment in a high-pressure environment. When measuring the thickness in a low-pressure environment, the above-mentioned defects are likely to occur, and continuous and repeated accurate measurements cannot be achieved. It is easy to make errors when only using the photoelectric sensor set in the above-mentioned device for measurement, and the repeated measurement structure of the same group of batteries is also unstable. Utility Model Content

[0005] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the utility model is to provide a device for stably measuring the thickness of laminated batteries, which has high repeated measurement accuracy.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A device for stably measuring the thickness of laminated batteries, characterized in that: it comprises a device support frame, wherein the device support frame is provided with four groups in total, a support plate fixedly welded to the top of the device support frame is provided above the device support frame, a battery placement module is provided between the four groups of the device support frames, the battery placement module comprises a placement platform for placing laminated batteries, the placement platform is located directly below the support plate, and an electric cylinder corresponding to the placement platform is fixedly provided above the support plate;

[0008] The lower end of the electric cylinder is provided with a counterweight pressure system connected to the electric cylinder and controlled by the electric cylinder, and the counterweight pressure system includes a pressure sensor, a movable plate, a lateral support block, a U-shaped block and a counterweight block. The pressure sensor is directly connected to the electric cylinder, and the movable plate is installed below the pressure sensor and is controlled by the electric cylinder to perform lifting actions together with the pressure sensor. The lateral support blocks are provided with two groups and are respectively fixed to the left and right ends of the movable plate. The U-shaped block is inverted and supported on the outside of the lateral support block, and the counterweight block is fixed to the lower end of the U-shaped block;

[0009] Displacement sensor transmitting ends with the same structure are respectively installed on the left and right sides of the placement platform, and the displacement sensor transmitting ends are arranged upwards. Displacement sensor receiving ends corresponding to the displacement sensor transmitting ends are fixedly arranged on the left and right sides of the counterweight block.

[0010] Furthermore, three groups of positioning inclined surfaces are provided in three directions at the outermost end of the lateral support block, and the U-shaped block is supported outside the lateral support block by the three groups of positioning inclined surfaces and will not loosen easily.

[0011] Furthermore, the battery placement module also includes a reinforced support frame and a support base plate. The support base plate is placed directly below the placement platform. The reinforced support frame is provided with two groups. The two groups of reinforced support frames are fixed between the placement platform and the support base plate to prevent the counterweight block from causing the placement platform to break.

[0012] Furthermore, a positioning sleeve is fixedly provided on the support plate, a limiting column is fixedly provided above the movable plate, the limiting column is slidably assembled with the positioning sleeve, and there are four groups of limiting columns to match each group of movable plates. The number of the positioning sleeves corresponds to the number of the limiting columns one by one, and the tops of the four groups of limiting columns are fixedly welded with limiting plates.

[0013] Furthermore, the battery placement module is provided with two sets in total to form a double-station structure, and the electric cylinder, counterweight pressure system, displacement sensor transmitting end and displacement sensor receiving end are also provided with two sets corresponding to the number of battery placement modules.

[0014] Furthermore, the placement platform is made of marble to improve measurement accuracy.

[0015] In summary, the utility model has the following beneficial effects:

[0016] The utility model can automatically complete the measurement of battery thickness, and by setting a counterweight pressure system, the thickness can be repeatedly measured by controlling a constant counterweight, with high repeated measurement accuracy. When dealing with servo failure, the thickness measurement reading can also be fed back immediately to prevent the thickness measurement value from having a large deviation.

[0017] The various structures of the utility model are stable and reliable, and will not affect the accuracy of the battery thickness measurement step. The overall quality is high and the measurement accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application, but do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 It is a front view of the utility model;

[0020] Figure 2 It is a perspective view of the U-shaped block in the utility model;

[0021] Figure 3 It is an oblique view of the utility model;

[0022] Figure 4 It is a side view of the utility model;

[0023] Figure 5 It is a schematic diagram of the counterweight pressure system of the utility model.

[0024] In the figure, 1. device support frame; 2. support plate; 3. placement platform; 4. electric cylinder; 5. pressure sensor; 6. movable plate; 7. lateral support block; 8. U-shaped block; 9. counterweight block; 10. displacement sensor transmitting end; 11. displacement sensor receiving end; 12. reinforced support frame; 13. support bottom plate; 14. positioning sleeve; 15. limit column; 16. limit plate. DETAILED DESCRIPTION

[0025] The above and other technical contents, features and functions of the present invention are described in detail below with reference to the attached Figure 1 To Attachment Figure 5 The detailed description of the embodiments will clearly show that the structural contents mentioned in the following embodiments are all based on the drawings in the specification.

[0026] Various exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings. Example

[0027] A device for stably measuring the thickness of laminated batteries comprises a device support frame 1, wherein the device support frame 1 is provided with four groups, and a support plate 2 fixedly welded to the top of the device support frame 1 is provided above the device support frame 1. The four groups of device support frames 1 and the support plate 2 together constitute the main bearing structure of the device.

[0028] Two sets of battery placement modules with the same structure are arranged between the four groups of device support frames 1, which together form a double-station structure, wherein the battery placement module includes a placement platform 3 for placing laminated batteries, and the placement platform 3 is made of marble, which has a flatter plane support structure and improves the measurement accuracy. The placement platform 3 is located directly below the support plate 2 as a whole, and the two groups of placement platforms 3 are respectively located on both sides below the support plate 2, and an electric cylinder 4 corresponding to the position of the placement platform 3 is fixed above the support plate 2.

[0029] Furthermore, the battery placement module also includes a reinforced support frame 12 and a support base plate 13. The support base plate 13 is placed directly below the placement platform 3. Two groups of reinforced support frames 12 are provided. The two groups of reinforced support frames 12 are fixed between the placement platform 3 and the support base plate 13. The reinforced support frames 12 are made of S45C steel, and the structure is more stable and reliable, which can prevent the placement platform 3 from breaking due to the excessive weight of the counterweight block 9.

[0030] The lower end of the electric cylinder 4 is provided with a counterweight pressure system connected to the electric cylinder 4 and controlled by the electric cylinder 4, wherein the counterweight pressure system includes a pressure sensor 5, a movable plate 6, a lateral support block 7, a U-shaped block 8 and a counterweight block 9. The pressure sensor 5 is directly connected to the electric cylinder 4, the movable plate 6 is installed below the pressure sensor 5, and is controlled by the electric cylinder 4 to perform lifting actions together with the pressure sensor 5. Two groups of lateral support blocks 7 are provided, and are respectively fixed to the left and right ends of the movable plate 6. The U-shaped block 8 is inverted and supported on the outside of the lateral support block 7, and the counterweight block 9 is fixed to the lower end of the U-shaped block 8.

[0031] It is further configured that three groups of positioning inclined surfaces are provided in three directions at the outermost end of the lateral support block 7, and the U-shaped block 8 is supported on the outside of the lateral support block 7 by the three groups of positioning inclined surfaces. The positions in the three directions are all locked, and the U-shaped block 8 will not loosen easily when supported above the lateral support block 7. The space below the U-shaped block 8 can be used for the lateral support block 7 to move downward, and the two can be separated from each other.

[0032] It is further provided that displacement sensor transmitting ends 10 of the same structure are respectively installed on the left and right sides of the placement platform 3, and the displacement sensor transmitting ends 10 are arranged upward, and displacement sensor receiving ends 11 corresponding to the displacement sensor transmitting ends 10 are fixedly arranged on the left and right sides of the counterweight block 9, and the above structure is used to measure the thickness of the battery.

[0033] It is further provided that a positioning sleeve 14 is fixedly provided on the support plate 2, and a limiting column 15 is fixedly provided above the movable plate 6. The limiting column 15 is slidably assembled with the positioning sleeve 14. There are four groups of limiting columns 15 to match each group of movable plates 6. The number of positioning sleeves 14 corresponds to the number of limiting columns 15 one by one. Limiting plates 16 are fixedly welded to the tops of the four groups of limiting columns 15. When the electric cylinder 4 drives the counterweight pressure system to descend, the above structure can play a role of positioning limitation, thereby promoting the stability and reliability of the structure during activity and improving the measurement accuracy.

[0034] In the above structure, the electric cylinder 4, the counterweight pressure system, the displacement sensor transmitting end 10 and the displacement sensor receiving end 11 are also provided with two sets corresponding to the number of battery placement modules, and are used in conjunction with the double-station structure.

[0035] In the implementation mode of the utility model, the battery is first moved to the top of the placement platform 3. Since the present embodiment has a double-station structure, the device can simultaneously perform measurement operations on two groups of laminated batteries. The electric cylinder 4 serves as the driving source of the present embodiment. The electric cylinder 4 controls the pressure sensor 5 and the movable plate 6 to descend in height. When the movable plate 6 descends, it is limited by the positioning rod to perform a linear downward movement, and drives the U-shaped block 8 and the counterweight block 9 supported on the outside of the lateral support block 7 to descend together until the lower plane of the counterweight block 9 contacts the upper plane of the laminated battery. At this time, the electric cylinder 4 continues to work to control the movable plate 6 to continue to descend. Since there is space for the lateral support block 7 to continue to descend and move below the U-shaped block 8, and the two structures are not welded and fixed together, the lateral support block 7 continues to descend with the movable plate 6, causing the movable plate 6 to separate from the counterweight block 9. At this time, the counterweight block 9 is completely placed flat on the upper plane of the laminated battery by its own gravity, and the uneven bulge on the upper plane of the laminated battery is flattened. The battery thickness under the current counterweight condition can be measured through the measurement work of the displacement sensor transmitting end 10 and the displacement sensor receiving end 11.

[0036] If servo failure occurs during the execution of the above steps, after the counterweight 9 has contacted the upper plane of the laminated battery, the movable plate 6 will continue to descend under the control of the electric cylinder 4, and the lower plane of the movable plate 6 will contact and squeeze the upper plane of the counterweight 9. At this time, additional pressure will be applied to the counterweight 9, affecting the accuracy of the data and making it impossible to control a constant counterweight. In addition, due to the presence of electrolyte inside the laminated battery, greater pressure will cause the laminated battery to deform, affecting the accuracy of thickness measurement. This requires pressure feedback through the pressure sensor 5 for judgment. At the moment when the counterweight 9 is pressed against the surface of the laminated battery, the displacement sensor transmitting end 10 and the displacement sensor receiving end 11 immediately measure the battery. The measurement repeatability can reach 5 microns, and an alarm operation is required subsequently to prevent the electric cylinder 4 from continuing to control the movable plate 6 to descend and ultimately damage the laminated battery.

[0037] When performing the above measurement steps, the weight of the counterweight block 9 can be adjusted arbitrarily by adding weights above the specified minimum pressure range, thereby achieving the purpose of making the counterweight flexible.

[0038] The above is a further detailed description of the present invention in combination with a specific implementation method, and it cannot be determined that the specific implementation of the present invention is limited to this; for technical personnel in the field of the present invention and related technical fields, based on the technical solution of the present invention, the expansion and replacement of operating methods and data should all fall within the protection scope of the present invention.

Claims

1. A device for stably measuring the thickness of laminated batteries, characterized in that: It comprises a device support frame (1), wherein the device support frame (1) is provided with four groups in total, a support plate (2) fixedly welded to the top of the device support frame (1) is provided above the device support frame (1), a battery placement module is provided between the four groups of the device support frames (1), the battery placement module comprises a placement platform (3) for placing laminated batteries, the placement platform (3) is located directly below the support plate (2), and an electric cylinder (4) corresponding to the placement platform (3) is fixedly provided above the support plate (2); The lower end of the electric cylinder (4) is provided with a counterweight pressure system connected to the electric cylinder (4) and controlled by the electric cylinder (4), the counterweight pressure system comprising a pressure sensor (5), a movable plate (6), a lateral support block (7), a U-shaped block (8) and a counterweight block (9), the pressure sensor (5) being directly connected to the electric cylinder (4), the movable plate (6) being installed below the pressure sensor (5) and being controlled by the electric cylinder (4) to perform a lifting action together with the pressure sensor (5), the lateral support block (7) being provided with two groups and being fixed to the left and right ends of the movable plate (6), respectively, the U-shaped block (8) being supported in an inverted manner on the outside of the lateral support block (7), and the counterweight block (9) being fixed to the lower end of the U-shaped block (8); Displacement sensor transmitting ends (10) of the same structure are respectively installed on the left and right sides of the placement platform (3), and the displacement sensor transmitting ends (10) are arranged upwards. Displacement sensor receiving ends (11) corresponding to the displacement sensor transmitting ends (10) are fixedly arranged on the left and right sides of the counterweight block (9).

2. The device for stably measuring the thickness of laminated batteries according to claim 1, characterized in that: Three sets of positioning inclined surfaces are provided in three directions at the outermost end of the lateral support block (7), and the U-shaped block (8) is supported on the outside of the lateral support block (7) by the three sets of positioning inclined surfaces and will not become loose easily.

3. The device for stably measuring the thickness of laminated batteries according to claim 1, characterized in that: The battery placement module further comprises a reinforced support frame (12) and a support base plate (13), wherein the support base plate (13) is placed directly below the placement platform (3), and the reinforced support frame (12) is provided with two groups, wherein the two groups of reinforced support frames (12) are fixed between the placement platform (3) and the support base plate (13) to prevent the counterweight block (9) from causing the placement platform (3) to break.

4. The device for stably measuring the thickness of laminated batteries according to claim 1, characterized in that: A positioning sleeve (14) is fixedly provided on the support plate (2), and a limiting column (15) is fixedly provided above the movable plate (6). The limiting column (15) is slidably assembled with the positioning sleeve (14). Four groups of limiting columns (15) are provided to match each group of movable plates (6). The number of the positioning sleeves (14) corresponds to the number of the limiting columns (15). The limiting plates (16) are fixedly welded to the tops of the four groups of limiting columns (15).

5. The device for stably measuring the thickness of laminated batteries according to claim 3, characterized in that: The battery placement modules are provided in two sets in total, forming a double-station structure, and the electric cylinder (4), the counterweight pressure system, the displacement sensor transmitting end (10) and the displacement sensor receiving end (11) are also provided in two sets corresponding to the number of battery placement modules.

6. The device for stably measuring the thickness of laminated batteries according to claim 5, characterized in that: The placement platform (3) is made of marble to improve measurement accuracy.

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