Battery performance testing device capable of simulating actual working conditions

Abstract

The utility model relates to a battery performance testing device for simulating actual working conditions, and relates to the technical field of battery production. The device comprises a fixed top plate, a pressing plate, a placing plate and a base which are arranged from top to bottom, a sliding rod is vertically arranged on the bottom wall of the fixed top plate, the sliding rod sequentially penetrates through the pressing plate and the placing plate, and a clamping space for placing a battery cell is formed between the pressing plate and the placing plate; the side wall of the placing plate is provided with a connecting channel for a wire of the charging and discharging cabinet to pass through. A plurality of stand columns are vertically arranged on the surface of the base, telescopic holes allowing the stand columns to penetrate through are formed in the bottom wall of the containing plate, the peripheral walls of the stand columns are sleeved with elastic pieces, the elastic pieces abut against the positions between the containing plate and the base, and the elastic pieces enable the containing plate to keep the moving tendency in the direction away from the base. A pressure sensor is arranged between the placing plate and the base in an abutting mode. The application has the effect of improving the reliability of the battery cell test result.

Description

Technical Field

[0001] The present application relates to the field of battery production technology, and in particular to a battery performance testing device that simulates actual working conditions. Background Art

[0002] Lithium battery is a battery with lithium metal or lithium alloy as positive and negative electrode materials and non-aqueous electrolyte solution. It has the advantages of high energy density, long service life, high rated voltage, etc., and is widely used in many fields. When the production of lithium batteries is completed, the battery cells will be tested for performance. The positive and negative pole ears of the battery cells are connected to the output terminals of the charging and discharging cabinet respectively to test the various performance of the battery cells. However, due to the difference between the test environment and the actual working environment, the test results are inconsistent with the actual working performance. The reliability of the test data is low, which is not conducive to the control of the subsequent battery cell production quality, so it needs to be improved. Utility Model Content

[0003] In order to improve the reliability of battery cell test results, the present application provides a battery performance testing device that simulates actual working conditions.

[0004] The present application provides a battery performance test device that simulates actual working conditions and adopts the following technical solutions:

[0005] A battery performance testing device simulating actual working conditions comprises a fixed top plate, a pressure plate, a placement plate and a base arranged from top to bottom, a sliding rod is vertically arranged on the bottom wall of the fixed top plate, the sliding rod passes through the pressure plate and the placement plate in sequence, a clamping space for placing a power core is formed between the pressure plate and the placement plate, a connecting channel for the wires of a charging and discharging cabinet to pass through is provided on the side wall of the placement plate; a plurality of columns are vertically arranged on the surface of the base, a telescopic hole for the columns to pass through is provided on the bottom wall of the placement plate, an elastic member is sleeved on the peripheral wall of the column, the elastic member is abutted between the placement plate and the base, the elastic member enables the placement plate to maintain a movement trend in a direction away from the base, and a pressure sensor is abutted between the placement plate and the base.

[0006] By adopting the above technical scheme, the battery cell to be tested is placed in the clamping space, the battery cell is abutted by the pressure plate, and the input and output terminals of the charging and discharging cabinet are respectively connected to the positive and negative electrodes of the battery cell through the connecting channels, so that the working condition of the battery cell can be simulated. When the battery cell is working, it will produce a certain expansion, and the expansion will produce an extrusion force on the placement plate. The pressure generated is further transmitted to the pressure sensor through the placement plate, the elastic part is compressed, and the value is detected by the pressure sensor. Therefore, the power-on performance of the battery cell can be analyzed through the detected pressure value and expansion degree, so as to facilitate subsequent improvements, thereby helping to improve the reliability of the detection data and the production quality of the battery cell.

[0007] Optionally, a locking cylinder is provided on the bottom wall of the fixed top plate, a piston rod of the locking cylinder is connected to the pressure plate, and the locking cylinder drives the pressure plate to slide along the length direction of the sliding rod.

[0008] By adopting the above technical solution, the locking cylinder can adjust the position of the pressure plate to facilitate the placement of the battery cell, and can also lock the pressure plate so that when the battery cell expands, it can drive the placement plate to slide.

[0009] Optionally, a distance meter is provided on the side wall of the base to detect the distance between the bottom wall of the placement plate and the top wall of the base.

[0010] By adopting the above technical solution, setting up a rangefinder can intuitively measure the expansion value of the battery cell, thereby further improving the reliability of the detection data.

[0011] Optionally, a heating sheet is provided on the bottom wall of the pressure plate, an annular sheet is provided around the heating sheet, the annular sheet is made of heat-insulating material, and a docking groove for embedding the bottom end of the annular sheet is provided on the surface of the placement plate.

[0012] By adopting the above technical solution, setting up a heating plate can simulate the working conditions of the battery cell in a high temperature environment, so that the test result data is closer to the actual working data and the accuracy is improved; the setting of the annular plate can reduce the dissipation of heat, thereby ensuring the accuracy of the test results.

[0013] Optionally, a positioning groove for placing the power core is opened on the surface of the placement plate, the connecting channel is connected to the positioning groove, and the heating plate is located above the positioning groove.

[0014] By adopting the above technical solution, the positioning groove is provided to position the battery cell to be tested, so as to prevent the battery cell from shaking and deviating during the testing process, thereby affecting the test result.

[0015] Optionally, an elastic abutment sheet is provided on the inner wall of each side of the positioning groove.

[0016] By adopting the above technical solution, due to the different sizes of the battery cells tested, a battery cell with a smaller size may be unstable when placed in the positioning groove. The elastic contact piece can press the battery cell in all directions to ensure stability.

[0017] Optionally, a temperature detection module is provided on the bottom wall of the positioning groove, and an audible and visual alarm is provided on the side wall of the fixed top plate. The audible and visual alarm is electrically connected to the temperature detection module, and the temperature detection module controls the opening and closing of the audible and visual alarm based on the detection value.

[0018] By adopting the above technical solution, a temperature detection module is provided to detect the temperature in the positioning groove in real time to prevent the heating plate from generating too much heat, causing the battery cell to burn, thereby reducing safety hazards.

[0019] Optionally, an anti-slip block is provided at one end of the sliding rod passing through the placement plate.

[0020] By adopting the above technical solution, the anti-drop block can be set to prevent the problem that the placement plate falls off the sliding rod and cannot be reset due to excessive expansion of the battery cell, thereby improving the stability and safety of the device of the present application.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The battery cell to be tested is placed in the clamping space, and the battery cell is abutted by the pressing plate. The input and output terminals of the charging and discharging cabinet are respectively connected to the positive and negative electrodes of the battery cell through the connecting channel, so as to simulate the working condition of the battery cell. When the battery cell is working, it will produce a certain expansion, and when it expands, it will produce a squeezing force on the placement plate. The pressure generated is further transmitted to the pressure sensor through the placement plate, and the pressure sensor detects the value. Therefore, the power-on performance of the battery cell can be analyzed through the detected pressure value and expansion degree, so as to facilitate subsequent improvements, thereby helping to improve the reliability of the test data and the production quality of the battery cell;

[0023] 2. Setting the heating sheet can simulate the working condition of the battery cell in a high temperature environment, so that the test result data is closer to the actual working data and improves the accuracy; the setting of the annular sheet can reduce the heat dissipation, so as to ensure the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a battery performance testing device that simulates actual working conditions in an embodiment of the present application.

[0025] Figure 2 It is a cross-sectional view of the test device in the embodiment of the present application.

[0026] Figure 3 It is a cross-sectional view of the column in the embodiment of the present application.

[0027] Explanation of the accompanying drawings: 1. Fixed top plate; 11. Sliding rod; 111. Anti-slip block; 12. Locking cylinder; 13. Sound and light alarm; 2. Pressing plate; 21. Heating plate; 22. Annular plate; 3. Placement plate; 31. Connecting channel; 32. Telescopic hole; 33. Docking groove; 34. Positioning groove; 35. Elastic abutment plate; 36. Temperature detection module; 4. Base; 41. Column; 42. Elastic part; 43. Rangefinder; 5. Clamping space; 6. Pressure sensor. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-3 This application is described in further detail.

[0029] The present application embodiment discloses a battery performance testing device that simulates actual working conditions. Figure 1 , including a fixed top plate 1, a pressing plate 2, a placing plate 3 and a base 4 which are arranged in sequence from top to bottom, wherein the top wall of the fixed top plate 1 is fixed, and a locking cylinder 12 is arranged at the center position of the bottom wall of the fixed top plate 1. The piston rod of the locking cylinder 12 is arranged in the vertical direction, and the end of the piston rod of the locking cylinder 12 is connected to the top wall of the pressing plate 2 through a flange, so as to drive the pressing plate 2 to rise and fall and fix the pressing plate 2.

[0030] Reference Figure 1 , sliding rods 11 are integrally formed at the four corners of the bottom wall of the fixed top plate 1, and the sliding rods 11 are arranged in the vertical direction. The sliding rods 11 pass through the pressing plate 2 and the placing plate 3 in sequence, and the sliding rods 11 pass through one end wall of the placing plate 3 to form an anti-falling block 111 integrally formed thereon. The diameter of the anti-falling block 111 is larger than the diameter of the sliding rod 11 to prevent the placing plate 3 from falling off the sliding rod 11. Both the pressing plate 2 and the placing plate 3 can slide along the length direction of the sliding rod 11.

[0031] Reference Figure 1 and Figure 2 A clamping space 5 for placing the battery cell to be tested is formed between the pressing plate 2 and the placing plate 3. A positioning groove 34 for embedding the battery cell is provided on the surface of the placing plate 3. At least two elastic abutment sheets 35 are connected to the inner wall of each side of the positioning groove 34 by gluing. In this embodiment, the elastic abutment sheets 35 are supported by insulating materials. The elastic abutment sheets 35 on four sides can keep the battery cell to be tested in the center of the positioning groove 34 at all times, so as to facilitate the fixation of battery cells of different sizes. A connecting channel 31 for the input and output terminals of the charging and discharging cabinet to pass through is provided on the side wall of the placing plate 3. The connecting channel 31 is communicated with the positioning groove 34 for circuit connection of the battery cell.

[0032] Reference Figure 1 and Figure 2 A heating sheet 21 is provided on the bottom wall of the pressing plate 2 above the positioning groove 34. The heating sheet 21 can generate heat after being energized, thereby simulating the working condition of the high-temperature environment of the battery cell to improve the reliability of subsequent detection data; an annular sheet 22 is provided around the heating sheet 21, and the heating sheet 21 is located inside the annular sheet 22. A docking groove 33 for embedding the bottom end of the annular sheet 22 is correspondingly opened on the surface of the placing plate 3 to achieve closure during battery cell testing, prevent heat dissipation, and ensure the accuracy of the experimental results. In this embodiment, the annular sheet 22 is made of heat-insulating material, such as ceramic fiber.

[0033] Reference Figure 1 and Figure 2 A temperature detection module 36 is embedded in the bottom wall of the positioning groove 34. In this embodiment, the temperature detection module 36 includes a thermometer and a PLC controller for detecting the temperature in the positioning groove 34. The thermometer measures the temperature and sends it to the PLC controller in real time. An audible and visual alarm 13 is arranged on the side wall of the fixed top plate 1. The audible and visual alarm 13 is communicated with the temperature detection module 36. When the detected temperature value exceeds a preset value (such as 100°C), the audible and visual alarm 13 will be controlled to start and sound an alarm to remind the detection personnel to turn off the heating plate 21 in time and stop the test to dissipate heat in the positioning groove 34.

[0034] Reference Figure 2 and Figure 3 The base 4 is placed on the ground, and the four corners of the surface of the base 4 are vertically provided with columns 41 by welding. The bottom wall of the placement plate 3 is provided with a telescopic hole 32 for the column 41 to pass through. The diameter of the telescopic hole 32 should be slightly larger than the diameter of the column 41 to reduce wear. In this embodiment, the end of the column 41 away from the base 4 is connected by welding with a cylindrical structure with a diameter larger than the column 41. Correspondingly, the bottom wall of the telescopic hole 32 is provided with a hole for the cylindrical structure to be embedded to prevent the placement plate 3 and the column 41 from falling off. Therefore, the placement plate 3 also needs to be provided with two upper and lower structures that can be assembled to facilitate the installation of the column 41; the peripheral wall of the column 41 is sleeved with an elastic member 42, and the elastic member 42 adopts a spring, and the elastic member 42 abuts between the bottom wall of the placement plate 3 and the top wall of the base 4. Under the action of the elastic member 42, the placement plate 3 always maintains a movement trend in the direction away from the base 4, and after the placement plate 3 slides toward the base 4, the placement plate 3 is driven to reset.

[0035] Reference Figure 2 and Figure 3 A pressure sensor 6 is provided between the placement plate 3 and the base 4, and the pressure sensor 6 is abutted between the bottom wall of the placement plate 3 and the top wall of the base 4 to detect the pressure generated after the battery cell expands during operation; a distance meter 43 is provided on the side wall of the base 4 to detect the distance between the top wall of the base 4 and the bottom wall of the placement plate 3, so as to measure the expansion amount of the battery cell during operation.

[0036] The implementation principle of a battery performance testing device that simulates actual working conditions in an embodiment of the present application is as follows: the battery cell to be tested is placed in the positioning groove 34, the input and output terminals of the charging and discharging cabinet are respectively connected to the positive and negative electrodes of the battery cell through the connecting channel 31, and the portion of the battery cell protruding from the positioning groove 34 is abutted by the pressing plate 2, and the heating plate 21 is started to simulate the working condition of the battery cell in a high temperature environment. The battery cell will expand to a certain extent when energized, and will generate an extrusion force on the placement plate 3 during expansion. The generated pressure is further transmitted to the pressure sensor 6 through the placement plate 3, and the value is detected by the pressure sensor 6, and the expansion amount is measured by the rangefinder 43. In this way, the power-on performance of the battery cell can be analyzed through the pressure value and the expansion amount, so as to facilitate subsequent improvements, thereby helping to improve the reliability of the detection data and the production quality of the battery cell.

[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A battery performance testing device simulating actual working conditions, characterized in that: The invention comprises a fixed top plate (1), a pressing plate (2), a placement plate (3) and a base (4) arranged from top to bottom, wherein a sliding rod (11) is vertically arranged on the bottom wall of the fixed top plate (1), and the sliding rod (11) passes through the pressing plate (2) and the placement plate (3) in sequence, and a clamping space (5) for placing a power core is formed between the pressing plate (2) and the placement plate (3), and a connecting channel (31) for the wires of the charging and discharging cabinet to pass through is opened on the side wall of the placement plate (3); the base (4) has a surface A plurality of columns (41) are vertically arranged on the surface; a telescopic hole (32) for the columns (41) to pass through is opened on the bottom wall of the placement plate (3); an elastic member (42) is sleeved on the peripheral wall of the column (41); the elastic member (42) is abutted between the placement plate (3) and the base (4); the elastic member (42) enables the placement plate (3) to maintain a movement tendency in a direction away from the base (4); and a pressure sensor (6) is abutted between the placement plate (3) and the base (4).

2. A battery performance testing device simulating actual working conditions according to claim 1, characterized in that: The bottom wall of the fixed top plate (1) is provided with a locking cylinder (12), the piston rod of the locking cylinder (12) is connected to the pressure plate (2), and the locking cylinder (12) drives the pressure plate (2) to slide along the length direction of the sliding rod (11).

3. A battery performance testing device simulating actual working conditions according to claim 1, characterized in that: The side wall of the base (4) is provided with a distance meter (43) for detecting the distance between the bottom wall of the placement plate (3) and the top wall of the base (4).

4. A battery performance testing device simulating actual working conditions according to claim 1, characterized in that: The bottom wall of the pressure plate (2) is provided with a heating plate (21), an annular plate (22) is provided around the heating plate (21), the annular plate (22) is made of a heat-insulating material, and the surface of the placement plate (3) is provided with a docking groove (33) for the bottom end of the annular plate (22) to be embedded.

5. A battery performance testing device simulating actual working conditions according to claim 4, characterized in that: A positioning groove (34) for placing the power core is provided on the surface of the placement plate (3), the connection channel (31) is connected to the positioning groove (34), and the heating plate (21) is located above the positioning groove (34).

6. A battery performance testing device simulating actual working conditions according to claim 5, characterized in that: An elastic contact piece (35) is provided on the inner wall of each side of the positioning groove (34).

7. A battery performance testing device simulating actual working conditions according to claim 5, characterized in that: The bottom wall of the positioning groove (34) is provided with a temperature detection module (36), and the side wall of the fixed top plate (1) is provided with an audible and visual alarm (13); the audible and visual alarm (13) is electrically connected to the temperature detection module (36), and the temperature detection module (36) controls the opening and closing of the audible and visual alarm (13) based on the detection value.

8. A battery performance testing device simulating actual working conditions according to claim 1, characterized in that: An anti-falling block (111) is provided at one end of the sliding rod (11) passing through the placement plate (3).

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