Method for detecting cycle durability of storage battery for parking air conditioner

Abstract

The invention discloses a method for detecting the cycle durability of a storage battery for a parking air conditioner, and the method specifically comprises the steps: completely charging the storage battery for the parking air conditioner, and then putting the completely charged storage battery into a constant-temperature water bath for charging and discharging detection, thereby determining the cycle durability of the storage battery for the parking air conditioner. According to the cycle durability detection method for the storage battery for the parking air conditioner, the problem that the test period of the storage battery for the parking air conditioner is long in the prior art is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of lead-acid battery detection methods, and relates to a method for detecting the cycle durability of a battery for a parking air conditioner. Background Art

[0002] In order to improve the working comfort of drivers and passengers, commercial vehicles, especially heavy trucks, are basically designed with electric air conditioning systems. To reduce fuel consumption, when the vehicle engine stops, the air conditioning system is powered by the onboard battery. Since the working mode of the parking air conditioning battery is quite different from the starting mode of the original vehicle, the performance requirements of the battery in the relevant standards cannot meet the actual use requirements of the parking air conditioning battery, or due to the long test cycle, the performance of the battery cannot be effectively controlled. Summary of the invention

[0003] The purpose of the present invention is to provide a method for detecting the cycle endurance of a storage battery for a parking air conditioner, which solves the problem of a long test cycle of the storage battery for the parking air conditioner in the prior art.

[0004] The technical solution adopted by the present invention is a method for detecting the cycle endurance of a battery for a parking air conditioner, specifically: fully charging the battery for the parking air conditioner, and then placing the fully charged battery in a constant temperature water bath for charge and discharge detection to determine the cycle endurance of the battery for the parking air conditioner.

[0005] The present invention is also characterized in that:

[0006] The parking air conditioning battery is a battery with a rated voltage of 12V composed of 6 single cells connected in series, or a battery with a rated voltage of 24V composed of 12 single cells connected in series.

[0007] The constant temperature in the thermostatic water bath is 25±2°C.

[0008] When a fully charged battery is placed in a constant temperature water bath, the battery terminals are 15 to 25 mm above the water surface in the water bath.

[0009] The specific process of charge and discharge detection is as follows:

[0010] S1, use a current of 40A to continuously discharge the fully charged battery placed in a constant temperature water bath until the average voltage of a single cell reaches 1.85±0.05V, and then record the discharge time;

[0011] S2, use the average voltage of single cell 2.33±0.05V and current limit 70~90A to charge the battery discharged by S1 for 6.0h;

[0012] S3: Use a current of 40A to continuously discharge the battery charged in S2 for 20 minutes. If the average voltage of the battery cell after 20 minutes of discharge is lower than 1.85V, the test ends. Otherwise, execute S4.

[0013] S4, use the average voltage of single cell 2.33±0.05V and current limit 70~90A to charge the battery discharged by S3 for 1.5h;

[0014] S5: Use a current of 40A to continuously discharge the battery charged in S4 for 20 minutes. If the average voltage of the battery cell after 20 minutes of discharge is lower than 1.85V, the test ends. Otherwise, execute S6.

[0015] S6, use the average voltage of single cell 2.33±0.05V and current limit 70~90A to charge the battery discharged by S5 for 2h;

[0016] S7, use a current of 50A to continuously charge the battery charged in S6 for 2 to 4 minutes;

[0017] S8, continuously discharge the battery charged in S7 with a current of 40A until the average voltage of a single cell reaches 1.85±0.05V and the discharge is terminated. Record the discharge time. If the discharge time is less than 40% of the discharge time recorded in S1, the test is terminated. Otherwise, execute S9;

[0018] S9, the battery discharged in S8 is continuously processed according to the steps of S2 to S8 until the experiment is finished. The number of effective cells completed at the end of the experiment is the cycle endurance of the battery for the parking air conditioner.

[0019] The beneficial effects of the present invention are:

[0020] The method for detecting the cycle endurance of a battery for a parking air conditioner of the present invention simulates the operating parameters of a vehicle to subject the battery to a certain charge and discharge cycle, and according to the change in battery capacity during the battery discharge process, a method for detecting the cycle endurance of a starting battery is proposed. The method of the present invention has a short detection time, that is, two cycles of detection can be completed every day, and is simple and easy to implement, and the result is reliable. It is suitable for the technical research, product development, manufacturing and quality control processes of batteries for parking air conditioners. DETAILED DESCRIPTION

[0021] The present invention is described in detail below in conjunction with specific implementation modes.

[0022] Example 1

[0023] The method for detecting the cycle endurance of a battery for a parking air conditioner of the present invention is specifically as follows: fully charging the battery for the parking air conditioner, and then placing the fully charged battery in a constant temperature water bath for charge and discharge detection to determine the cycle endurance of the battery for the parking air conditioner, wherein the battery for the parking air conditioner is a battery with a rated voltage of 12V composed of 6 single cells connected in series or a battery with a rated voltage of 24V composed of 12 single cells connected in series.

[0024] The specific process of charge and discharge detection is as follows:

[0025] S1, use a current of 40A to continuously discharge the fully charged battery placed in a constant temperature water bath until the average voltage of a single cell reaches 1.85±0.05V, and then record the discharge time;

[0026] S2, use the average voltage of single cell 2.33±0.05V and current limit 70~90A to charge the battery discharged by S1 for 6.0h;

[0027] S3: Use a current of 40A to continuously discharge the battery charged in S2 for 20 minutes. If the average voltage of the battery cell after 20 minutes of discharge is lower than 1.85V, the test ends. Otherwise, execute S4.

[0028] S4, use the average voltage of single cell 2.33±0.05V and current limit 70~90A to charge the battery discharged by S3 for 1.5h;

[0029] S5: Use a current of 40A to continuously discharge the battery charged in S4 for 20 minutes. If the average voltage of the battery cell after 20 minutes of discharge is lower than 1.85V, the test ends. Otherwise, execute S6.

[0030] S6, use the average voltage of single cell 2.33±0.05V and current limit 70~90A to charge the battery discharged by S5 for 2h;

[0031] S7, use a current of 50A to continuously charge the battery charged in S6 for 2 to 4 minutes;

[0032] S8, continuously discharge the battery charged in S7 with a current of 40A until the average voltage of a single cell reaches 1.85±0.05V and the discharge is terminated. Record the discharge time. If the discharge time is less than 40% of the discharge time recorded in S1, the test is terminated. Otherwise, execute S9;

[0033] S9, the battery discharged in S8 is continuously processed according to the steps of S2 to S8 until the experiment is finished. The number of effective cells completed at the end of the experiment is the cycle endurance of the battery for the parking air conditioner.

[0034] Example 2

[0035] On the basis of Example 1, the constant temperature in the constant temperature water bath is 25±2° C. When a fully charged battery is placed in the constant temperature water bath, the starting terminal of the battery is 15 to 25 mm above the water surface in the water bath.

[0036] Example 3

[0037] On the basis of Example 2, this example tests the cycle endurance of a 6-QWD-220 type battery composed of 6 cells connected in series and with a rated voltage of 12V, as follows:

[0038] After the battery is fully charged, place it in a constant temperature water bath at 25°C. The starting terminal should be 20mm above the water surface. Then, perform the charge and discharge test. The charge and discharge test process is as follows:

[0039] S1, discharge continuously with a current of 40A until the battery terminal voltage reaches 11.10V and the discharge is terminated. The discharge time is recorded;

[0040] S2, charging continuously for 6.0h with a constant voltage of 14.0V and a current limit of 70-90A;

[0041] S3, discharge continuously with a current of 40A for 20 minutes. If the average voltage of a single cell of the battery is lower than 11.1V after 20 minutes of discharge, the test ends, otherwise continue to S4;

[0042] S4, charge for 1.5h with constant voltage 14.0V and current limit 70~90A;

[0043] S5: Discharge continuously for 20 minutes with a current of 40A. If the average voltage of a single cell of the battery is lower than 11.1V after 20 minutes of discharge, the test ends. Otherwise, continue to S6.

[0044] S6, charge for 2h with constant voltage 14.0V and current limit 70~90A;

[0045] S7, charge continuously for 2 to 4 minutes with a current of 50A;

[0046] S8, discharge continuously with a current of 40A until the battery terminal voltage reaches 11.10V and the discharge is terminated. The discharge time is recorded. If the discharge time is less than 40% of the discharge time measured in S1, the test is terminated. Otherwise, execute S9;

[0047] S9, the battery discharged in S8 is continuously processed according to the steps of S2 to S8 until the experiment is finished. The number of effective cells completed at the end of the experiment is the cycle endurance of the battery for the parking air conditioner.

[0048] According to the test of this embodiment, the cycle endurance of the 6-QWD-220 parking air conditioner battery is 310 times.

[0049] Example 4

[0050] On the basis of Example 2, this example tests the cycle endurance of a 12-QWD-200 parking air conditioner battery composed of 12 cells connected in series and with a rated voltage of 24V, as follows:

[0051] After the battery is fully charged, place it in a constant temperature water bath at 25°C, with its terminals 20mm above the water surface, and then perform charge and discharge tests. The charge and discharge test process is as follows:

[0052] S1, discharge continuously with a current of 40A until the battery terminal voltage reaches 22.20V and the discharge is terminated. The discharge time is recorded;

[0053] S2, charging continuously for 6.0h with a constant voltage of 28.0V and a current limit of 70-90A;

[0054] S3, discharge continuously with a current of 40A for 20 minutes. If the average voltage of a single cell of the battery is lower than 22.2V after 20 minutes of discharge, the test ends, otherwise continue to S4;

[0055] S4, charge for 1.5h with constant voltage 28.0V and current limit 70~90A;

[0056] S5: Discharge continuously for 20 minutes with a current of 40A. If the average voltage of a single cell of the battery is lower than 22.2V after 20 minutes of discharge, the test ends. Otherwise, continue to S6.

[0057] S6, charge for 2h with constant voltage 28.0V and current limit 70~90A;

[0058] S7, charge continuously for 2 to 4 minutes with a current of 50A;

[0059] S8, discharge continuously with a current of 40A until the battery terminal voltage reaches 22.20V and the discharge is terminated. The discharge time is recorded. If the discharge time is less than 40% of the discharge time measured in S1, the test is terminated. Otherwise, execute S9;

[0060] S9, the battery discharged in S8 is continuously processed according to the steps of S2 to S8 until the experiment is finished. The number of effective cells completed at the end of the experiment is the cycle endurance of the battery for the parking air conditioner.

[0061] According to the test of this embodiment, the cycle endurance of the 12-QWD-200 parking air conditioner battery is 265 times.

Claims

1. A method for testing the cycle durability of a battery for a parking air conditioner, characterized in that: Specifically, the parking air conditioner battery is fully charged, and then the fully charged battery is placed in a constant temperature water bath for charge and discharge testing to determine the cycle endurance of the parking air conditioner battery.

2. The method for detecting cycle durability of a parking air conditioner battery according to claim 1, characterized in that: The parking air conditioner battery is a battery with a rated voltage of 12V composed of 6 cells connected in series or a battery with a rated voltage of 24V composed of 12 cells connected in series.

3. The method for detecting cycle durability of a parking air conditioner battery according to claim 2, characterized in that: The constant temperature in the constant temperature water bath is 25±2°C.

4. The method for detecting cycle durability of a parking air conditioner battery according to claim 3, characterized in that: When a fully charged battery is placed in a constant temperature water bath, the starting terminal of the battery is 15 to 25 mm above the water surface in the water bath.

5. The method for detecting cycle durability of a battery for a parking air conditioner according to claim 4, characterized in that: The specific process of charge and discharge detection is as follows: S1, use a current of 40A to continuously discharge the fully charged battery placed in a constant temperature water bath until the average voltage of a single cell reaches 1.85±0.05V, and then record the discharge time; S2, use the average voltage of single cell 2.33±0.05V and current limit 70~90A to charge the battery discharged by S1 for 6.0h; S3: Use a current of 40A to continuously discharge the battery charged in S2 for 20 minutes. If the average voltage of the battery cell after 20 minutes of discharge is lower than 1.85V, the test ends. Otherwise, execute S4. S4, use the average voltage of single cell 2.33±0.05V and current limit 70~90A to charge the battery discharged by S3 for 1.5h; S5: Use a current of 40A to continuously discharge the battery charged in S4 for 20 minutes. If the average voltage of the battery cell after 20 minutes of discharge is lower than 1.85V, the test ends. Otherwise, execute S6. S6, use the average voltage of single cell 2.33±0.05V and current limit 70~90A to charge the battery discharged by S5 for 2h; S7, use a current of 50A to continuously charge the battery charged in S6 for 2 to 4 minutes; S8, continuously discharge the battery charged in S7 with a current of 40A until the average voltage of a single cell reaches 1.85±0.05V and the discharge is terminated. Record the discharge time. If the discharge time is less than 40% of the discharge time recorded in S1, the test is terminated. Otherwise, execute S9; S9, the battery discharged in S8 is continuously processed according to the steps of S2 to S8 until the experiment is finished. The number of effective cells completed at the end of the experiment is the cycle endurance of the battery for the parking air conditioner.