Detection method of lead-carbon battery oil-resistant plastic shell strength detection device

Abstract

This invention relates to the field of battery casing testing, and discloses a testing method for a lead-carbon battery oil-resistant casing strength testing device. Two clamping rods (2) have their clamping ends symmetrically penetrating the lower parts of two oppositely arranged testing sidewalls (101) of a base (1) and extending into the base. Their adjusting ends are located outside the base, and a clamping adjustment handle (4) is fixed to the adjusting ends of each clamping rod. The two clamping rods are threadedly connected to the two testing sidewalls. Two tensioning rods (3) have their tensioning ends symmetrically penetrating the upper parts of the two testing sidewalls and extending into the base. Their adjusting ends are located outside the base, and a tension block (5) is provided at the tensioning ends of each tensioning rod. A tension adjustment handle (9) is fixed to the adjusting ends of each tensioning rod. Using this device, the strength of the battery casing can be easily measured, ensuring the accuracy of the test.

Description

Case Analysis

[0001] This invention is a divisional application filed on August 14, 2018, with application number 2018109221506, entitled "Engine and Method for Testing the Strength of Oil-Resistant Plastic Casing of Lead-Carbon Batteries". Technical Field

[0002] This invention relates to the field of battery casing testing, and particularly to a testing method for a lead-carbon battery oil-resistant casing strength testing device. Background Technology

[0003] Batteries are a crucial component of electric vehicles, but assembly processes by electric vehicle manufacturers frequently result in the cracking of the battery casing. Common causes include excessive pressure on fasteners damaging the casing, or contact with oily solvents such as brake fluid, which easily leads to casing cracking. Therefore, casing manufacturers have optimized and upgraded the material properties, improving the casing's strength and oil resistance. The upgraded casings significantly reduce the probability of cracking during use. However, due to the changes in casing strength and oil resistance after the upgrade, conventional sampling inspection standards and methods can no longer guarantee accuracy, necessitating the invention of a device and testing method to determine the quality of incoming battery casings. Summary of the Invention

[0004] Purpose of the invention: To address the problems existing in the prior art, the present invention provides a testing method for a lead-carbon battery oil-resistant plastic shell strength testing device. Using this device, the strength of the plastic shell of the battery under test can be easily measured, ensuring the accuracy of the test.

[0005] Technical Solution: This invention provides a strength testing device for the oil-resistant plastic casing of lead-carbon batteries, comprising a base, two clamping rods, and two tensioning rods. The clamping ends of the two clamping rods symmetrically penetrate the lower parts of two oppositely arranged detection sidewalls of the base and extend into the base. The adjusting ends are located outside the base, and a clamping adjustment handle is fixed to the adjusting ends of each of the two clamping rods. The two clamping rods are threadedly connected to the two detection sidewalls. The tensioning ends of the two tensioning rods symmetrically penetrate the upper parts of the two detection sidewalls and extend into the base. The adjusting ends are located outside the base, and a tension block is provided at the tensioning ends of each of the two tensioning rods. A tension adjustment handle is fixed to the adjusting ends of each of the two tensioning rods.

[0006] Furthermore, each of the two detection sidewalls has an adjustment groove, which is perpendicular to the bottom surface of the base and extends through the detection sidewall. The tensioning ends of the two tensioning rods symmetrically pass through the corresponding adjustment grooves through the two detection sidewalls, and each tensioning rod is threaded with an adjustment nut. To enable this device to measure the strength of battery casings of different sizes, two adjustment grooves perpendicular to the base are symmetrically arranged on the two detection sidewalls. This allows the height of the two tensioning rods on the two detection sidewalls to be adjusted, and consequently, the height of the two tension blocks on the detection sidewalls to be adjusted, making this device suitable for measuring battery casings of different sizes.

[0007] Preferably, the adjusting groove is located between the adjusting nut and the tension block; or, the adjusting nut is located between the adjusting groove and the tension block. The adjusting nut is provided to fix the position of the tension rod after the plastic casing of the battery under test is placed in the base.

[0008] Preferably, the two tension blocks are rotatably connected to the tensioning ends of the two tensioning rods. This rotatable connection between the tension blocks and the tensioning rods allows for easy adjustment of the position between the tension blocks and the sidewalls of the battery casing under test. This ensures that when the battery casing is placed inside the base, the two opposite sides can be easily positioned between the corresponding tension blocks and the clamping ends of the clamping rods.

[0009] Preferably, the two clamping rods, the two tensioning rods, and the two adjusting grooves are all located in the same plane. Having these components in the same plane effectively ensures that the position of the battery casing under test within the base remains stable during measurement, preventing displacement that could lead to inaccurate measurement results.

[0010] Furthermore, a clamping block is fixed to the clamping end of each of the two clamping rods. The clamping block increases the contact area between the clamping end of the clamping rod and the outer wall of the battery casing under test, ensuring the stability of the battery casing within the base during measurement and preventing displacement that could lead to inaccurate measurement results.

[0011] Preferably, the difference between the distance between the two detection sidewalls and the width of the battery casing under test is greater than 10mm. This design ensures that there is a 4-5mm distance between the two opposite sidewalls of the battery casing under test and the two detection sidewalls of the base, allowing sufficient tensile displacement for the tension rod to stretch the sidewalls of the battery casing during subsequent measurements.

[0012] Preferably, both clamping rods and both tensioning rods are screws.

[0013] This invention also provides a testing method for a lead-carbon battery oil-resistant plastic shell strength testing device, comprising the following steps: S1: placing the plastic shell of the battery to be tested with its opening facing upwards inside the base, such that the two opposite sidewalls of the plastic shell are respectively located between the pressing end of the corresponding pressing rod and the tension block of the tension rod; S2: adjusting the two pressing adjustment handles so that the pressing ends of the two pressing adjustment handles lock and fix the plastic shell of the battery to be tested from both sides; S3: adjusting the two tension adjustment handles so that the two tension blocks are locked and fixed between the two opposite sidewalls of the plastic shell of the battery to be tested. S4: Gently press the inner sides of the opposing sidewalls together, and measure the distances d1 and d2 between the outer sidewalls of the two opposing sidewalls and the inner sidewalls of the corresponding test sidewalls; S5: Adjust the two tensioning handles again to reduce d1 and d2 by 4~5mm respectively; S6: Place the testing device together with the battery shell to be tested in a temperature chamber, keep it at 50~60℃ for 20~30h, and then take it out and cool it at room temperature; S7: Observe whether there are cracks on the two opposing sidewalls of the battery shell to be tested. If there are no cracks, it means that the strength of the battery shell to be tested is qualified.

[0014] Furthermore, in step S1, before placing the battery casing under test with its opening facing upwards into the base, DOT4 brake fluid is uniformly applied to the outer surfaces of the two opposite sidewalls of the battery casing under test. Applying DOT4 brake fluid to the outer surfaces of the two opposite sidewalls of the battery casing before performing the strength measurement ensures that this strength measurement process is simultaneously a measurement of the oil resistance of the battery casing.

[0015] Beneficial effects: When using this testing device, the battery casing to be tested is placed in the base. The two clamping levers are adjusted to tighten the two clamping rods, and the two tension levers are adjusted to tighten the two opposite sidewalls of the casing between the clamping ends of the clamping rods and the tension blocks of the tension levers. The distances d1 and d2 between the two opposite outer sidewalls of the casing and the two test sidewalls of the base are recorded. Then, the two tension levers are adjusted again to reduce d1 and d2 by a preset distance. The device and the battery casing to be tested are then placed in an insulated chamber and kept at a preset temperature for a preset time. The strength of the battery casing can then be measured. Therefore, using this device to measure the strength of battery casings is simple and ensures accurate testing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the lead-carbon battery oil-resistant plastic shell strength testing device in embodiments 1 and 2;

[0017] Figure 2 This is a schematic diagram of the lead-carbon battery oil-resistant plastic shell strength testing device in the testing state in embodiments 1 and 2.

[0018] Figure 3 This is a schematic diagram of the strength testing device for the oil-resistant plastic casing of lead-carbon batteries in Embodiment 2;

[0019] Figure 4 This is a schematic diagram of the lead-carbon battery oil-resistant plastic shell strength testing device in the testing state in Implementation Method 2. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings.

[0021] Implementation method 1:

[0022] This embodiment provides a device and method for testing the oil-resistant plastic casing strength of lead-carbon batteries, such as... Figure 1 As shown, the testing device mainly consists of a base 1, two clamping rods 2, and two tensioning rods 3. The base 1 has an opening at the top, and two testing sidewalls 101 are arranged opposite each other on the left and right sides. The two testing sidewalls 101 are parallel to each other and perpendicular to the bottom surface of the base 1. The difference between the distance w1 between the two testing sidewalls 101 and the width w2 of the plastic shell 8 of the battery to be tested is greater than 10mm. The clamping ends of the two clamping rods 2 symmetrically penetrate the testing sidewalls 101 from the bottom and are located inside the base 1. The two clamping rods 2 are respectively connected to the two testing sidewalls 101. In practical applications, the threaded connection means that the clamping rod 2 is typically a screw. Each clamping end of the two clamping rods 2 is fixed with a clamping block 7, and each adjusting end exposed outside the base 1 is fixed with a clamping adjustment handle 4. The tensioning ends of the two tensioning rods 3 symmetrically penetrate the upper parts of the two detection sidewalls 101 and extend into the base 1. The adjusting ends are located outside the base 1, and each tensioning end of the two tensioning rods 3 is provided with a tension block 5. Each adjusting end of the two tensioning rods 3 is also fixed with a tension adjustment handle 9, and each tensioning end of the two tensioning rods 3 is connected with a tension block 5. In this embodiment, the two tensioning rods 3 are also threadedly connected to the two detection sidewalls 101, and the tensioning rods 3 are typically screws.

[0023] To ensure the stability of the battery casing 8 within the base 1 during testing, the two clamping rods 2 and the two tensioning rods 3 are all positioned in the same plane.

[0024] The method for testing the strength of the lead-carbon battery oil-resistant plastic casing using the lead-carbon battery oil-resistant plastic casing strength testing device in this embodiment is as follows:

[0025] S1: Place the battery casing 8, with the opening facing upwards, inside the base 1, such as... Figure 2 This ensures that the two opposite sidewalls 801 of the battery casing 8 to be tested are located between the pressing end of the corresponding pressing rod 2 and the tension block 5 of the tension rod 3, respectively.

[0026] S2: Adjust the two clamping adjustment handles 4 so that the clamping ends of the two clamping adjustment handles 4 lock and fix the battery plastic shell 8 from both sides.

[0027] S3: Adjust the two tension adjustment handles 9 so that the two tension blocks 5 gently fit against the inner sides of the two opposite side walls 801 of the battery shell 8 to be tested. Then measure the distances d1 and d2 between the outer side walls of the two opposite side walls 801 and the inner side walls of the corresponding detection side walls 101 at this time.

[0028] S4: Adjust the two tension adjustment handles 9 again to adjust the distances d11 and d21 (not shown in the figure) between the outer sidewalls of the two opposite sidewalls 801 and the inner sidewalls of the corresponding detection sidewalls 101, ensuring that d1-d11 = 4~5mm and d2-d21 = 4~5mm.

[0029] S5: Place the testing device along with the plastic casing 8 of the battery under test in a temperature chamber and keep it at 50~60℃ for 20~30 hours. Then remove it and cool it at room temperature.

[0030] S6: Observe whether there are cracks on the two opposite sidewalls 801 of the battery shell 8 under test. If there are no cracks, it means that the strength of the battery shell 8 under test is qualified.

[0031] If it is necessary to test the oil resistance of the battery shell 8, in S1, first apply DOT4 brake fluid evenly to the outer surface of the two opposite sidewalls 801 of the battery shell 8, then place the battery shell 8 in the base 1, and then proceed with S2~S6.

[0032] Implementation method: 2

[0033] This embodiment is a further improvement on embodiment 1. The main improvement is that in embodiment 1, the tension block 5 is fixed to the tensioning end of the tensioning rod 3. When the battery shell 8 to be tested is placed inside the base 1, since the tension block 5 cannot rotate, it is not easy to position the two opposite sidewalls 801 of the battery shell 8 to be tested precisely between the pressing end of the corresponding pressing rod 2 and the tension block 5. In this embodiment, the tension block 5 is configured to be rotatably connected to the tensioning end of the tensioning rod 3. Thus, when the battery shell 8 to be tested is placed inside the base 1, rotating the tension block 5 makes it easy to position the two opposite sidewalls 801 of the battery shell 8 to be tested between the pressing end of the corresponding pressing rod 2 and the tension block 5.

[0034] Apart from the above, this implementation method is exactly the same as implementation method 1, and will not be described again here.

[0035] Implementation method: 3

[0036] This embodiment is a further improvement on embodiment 1. The main improvement is that in embodiment 1, since the tension rod 3 is a screw, and the two tension rods 3 are threadedly connected to the two detection sidewalls 101, the detection device can only be used for one size of battery casing 8. When the size of the battery casing 8 becomes smaller or larger, a detection device matching the size needs to be replaced, resulting in high detection costs. In contrast, the detection device in this embodiment can be used to detect the strength and oil resistance of battery casings 8 of different sizes.

[0037] Specifically, in the lead-carbon battery oil-resistant plastic shell strength testing device of this embodiment, an adjustment groove 102 with a long strip-shaped through hole structure is also provided on each of the two testing side walls 101, such as... Figure 3 Two adjustment slots 102 are symmetrically arranged on the two detection sidewalls 101 and are perpendicular to the bottom surface of the base 1. The two adjustment slots 102 are parallel to each other. The tensioning ends of the two tensioning rods 3 pass through the two adjustment slots 102 to the inner side of the two detection sidewalls 101, and are fixed to one side of the corresponding adjustment slot 102 by an adjustment nut 6.

[0038] like Figure 4 When measuring the height of the battery casing 8, which is relatively small, adjust the adjusting nut 6 a certain distance away from the battery casing 8 (as shown by the arrow in the figure). Then, move the tension rod 3 downward along the adjusting groove 102 until the tension block 5 is just stuck inside the two opposite side walls 801 of the battery casing 8. Then, adjust the adjusting nut 6 towards the battery casing 8 until the tension block 5 gently touches the two opposite side walls 801 of the battery casing 8. Then, continue the subsequent testing steps according to the same steps S3 to S6 as in Embodiment 1. When measuring the height of the battery casing 8, which is relatively large, adjust the position of the tension rod 3 in the opposite manner as described above. This will not be elaborated here.

[0039] Apart from the above, this implementation method is exactly the same as implementation method 1, and will not be described again here.

[0040] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent transformations or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A testing method for a lead-carbon battery oil-resistant plastic casing strength testing device, characterized in that, The device includes a base (1), two clamping rods (2) and two tensioning rods (3). The clamping ends of the two clamping rods (2) symmetrically penetrate the lower part of the two oppositely arranged detection sidewalls (101) of the base (1) and extend into the base (1). The adjusting ends are located outside the base (1), and a clamping adjustment handle (4) is fixed to the adjusting ends of the two clamping rods (2). The two clamping rods (2) are threadedly connected to the two detection sidewalls (101). The tensioning ends of the two tensioning rods (3) symmetrically penetrate the upper part of the two detection sidewalls (101) and extend into the base (1). The adjusting ends are located outside the base (1), and a tension block (5) is provided at the tensioning ends of the two tensioning rods (3). A tension adjustment handle (9) is fixed to the adjusting ends of the two tensioning rods (3). The detection method of this detection device includes the following steps: S1: Place the battery shell (8) to be tested with its opening facing upward inside the base (1), so that the two opposite side walls (801) of the battery shell (8) to be tested are respectively located between the pressing end of the corresponding pressing rod (2) and the tension block (5) of the tension rod (3); S2: Adjust the two clamping adjustment handles (4) so ​​that the clamping ends of the two clamping adjustment handles (4) lock and fix the battery shell (8) from both sides; S3: Adjust the two tension adjustment handles (9) so that the two tension blocks (5) gently fit against the inner sides of the two opposite side walls (801) of the plastic shell of the battery to be tested (8), and measure the distances d1 and d2 between the outer side walls of the two opposite side walls (801) and the inner side walls of the corresponding detection side walls (101) at this time. S4: Adjust the two tension adjustment handles (9) again to reduce d1 and d2 by 4~5mm respectively; S5: Place the detection device together with the plastic shell (8) of the battery to be tested in a temperature chamber, keep it at 50~60℃ for 20~30h, and then take it out and cool it at room temperature; S6: Observe whether there are cracks on the two opposite sidewalls (801) of the battery shell (8) to be tested. If there are no cracks, it means that the strength of the battery shell (8) to be tested is qualified.

2. The testing method of the lead-carbon battery oil-resistant plastic shell strength testing device according to claim 1, characterized in that, Both of the detection sidewalls (101) have adjustment grooves (102), which are perpendicular to the bottom surface of the base (1) and penetrate the detection sidewalls (101); the tensioning ends of the two tensioning rods (3) respectively pass through the corresponding adjustment grooves (102) symmetrically through the two detection sidewalls (101), and each of the two tensioning rods (3) is threaded with an adjustment nut (6).

3. The testing method of the lead-carbon battery oil-resistant plastic shell strength testing device according to claim 2, characterized in that, The adjusting groove (102) is located between the adjusting nut (6) and the tension block (5); or, the adjusting nut (6) is located between the adjusting groove (102) and the tension block (5).

4. The testing method of the lead-carbon battery oil-resistant plastic shell strength testing device according to claim 1, characterized in that, The two tension blocks (5) are rotatably connected to the tensioning ends of the two tension rods (3).

5. The testing method of the lead-carbon battery oil-resistant plastic shell strength testing device according to claim 2, characterized in that, The two clamping rods (2), the two tensioning rods (3), and the two adjusting grooves (102) are all located in the same plane.

6. The testing method of the lead-carbon battery oil-resistant plastic shell strength testing device according to any one of claims 1 to 5, characterized in that, A clamping block (7) is also fixed to the clamping end of each of the two clamping rods (2).

7. The testing method of the lead-carbon battery oil-resistant plastic shell strength testing device according to any one of claims 1 to 5, wherein the difference between the distance between the two testing sidewalls (101) and the width of the battery plastic shell (8) to be tested is greater than 10 mm.

8. The testing method of the lead-carbon battery oil-resistant plastic shell strength testing device according to any one of claims 1 to 5, characterized in that, Both of the clamping rods (2) and the two tensioning rods (3) are screws.

9. The testing method of the lead-carbon battery oil-resistant plastic shell strength testing device according to any one of claims 1 to 5, characterized in that, In S1, before placing the battery shell (8) under test with its opening facing upward into the base (1), DOT4 brake fluid is uniformly applied to the outer surfaces of the two opposite sidewalls (801) of the battery shell (8).

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