CN111007415A - Storage battery life testing method for 30% depth of discharge - Google Patents
Storage battery life testing method for 30% depth of discharge Download PDFInfo
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- CN111007415A CN111007415A CN201911180327.0A CN201911180327A CN111007415A CN 111007415 A CN111007415 A CN 111007415A CN 201911180327 A CN201911180327 A CN 201911180327A CN 111007415 A CN111007415 A CN 111007415A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
- G01R31/379—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator for lead-acid batteries
Abstract
A battery life test method for 30% depth of discharge, the test method comprising the steps of: the method comprises the following steps: ensuring that the temperature of the storage battery to be tested is discharged at 35 ℃, and adopting 0.3C10 for discharging for 1 hour during discharging, or considering that the discharging is finished when the discharging reaches the cut-off voltage of 1.8V/monomer; step two: after the discharging in the first step is finished, charging the storage battery for 1.5-2.5 hours by using a constant voltage of 2.4-2.55V and a current limiting of 0.35-0.45C 10; step three: circularly performing the operations of the first step and the second step to a preset number of times, and continuously charging the storage battery for 12 hours at a constant voltage of 2.35V/monomer and a current limiting value of 0.15C10 every 30 times of circulation; step four: carrying out 10-hour rate capacity detection on the storage battery; step five: and circularly performing the first step to the fourth step until reaching a preset number of times or reaching a preset residual capacity of the storage battery. The acceleration method of the invention achieves the test effect on the premise of saving time, and greatly shortens the test time.
Description
Technical Field
The invention belongs to the technical field of storage battery service life testing, and particularly relates to a storage battery service life testing method for 30% of discharge depth.
Background
Lead-acid batteries have been developed for more than 100 years, the research on batteries is mature, the batteries themselves have no great improvement space, and the development direction of the lead-acid batteries is the direction for catering to the market, improving the product competitiveness and reducing the cost. However, the production cost is not reduced too much, and only the cost reduction from the aspects of maintenance and service of the battery can be used for obtaining profit.
The battery life test of 30% depth of discharge is one kind in the battery life test, and the cycle test cycle time of battery in this kind of depth of discharge's lead acid battery trade is longer at present, and most battery cycle life tests are more than a year, and this must occupy a large amount of test resources, consumes huge manpower and materials, is in the wait state basically in the whole test constitutes, and this brings very big risk to the project development, and is very unfavorable to the development of enterprise. Shortening the whole cycle charge-discharge test period and accelerating the test speed, is a bottleneck problem needing to be solved urgently in the industry, and is urgently needed to be solved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method for testing the service life of a storage battery with 30% depth of discharge, which has the following specific technical scheme:
a battery life test method for 30% depth of discharge, the test method comprising the steps of:
the method comprises the following steps: ensuring that the temperature of the storage battery to be tested is discharged at 35 ℃, and adopting 0.3C during discharging10Discharging for 1 hour, or when the discharge reaches the cut-off voltage of 1.8V/monomer, the discharge can be considered to be finished;
step two: after the discharge in the first step is finished, a constant voltage of 2.4-2.55V and a current limit of 0.35-0.45C are used10Charging the storage battery for 1.5-2.5 hours;
step three: circularly performing the operations of the first step and the second step to a preset number of times, and circulating every 30 timesThe constant pressure is 2.35V/monomer, the flow limiting value is 0.15C10Continuously charging the storage battery for 12 hours;
step four: carrying out 10-hour rate capacity detection on the storage battery;
step five: and circularly performing the first step to the fourth step until reaching a preset number of times or reaching a preset residual capacity of the storage battery.
Further, the storage battery to be tested is kept still for 24-36 hours at 35 ℃ under the environment of 35 ℃ to ensure that the temperature of the storage battery to be tested is 35 ℃, so that the temperature variation deviation of the storage battery is +/-1%.
Further, said performing a 10 hour rate capacity check comprises 0.1C10Constant current discharge to 1.8V/monomer, constant voltage of 2.35V/monomer, and current limiting of 0.15C10Charging for 16 hours.
The invention has the beneficial effects that:
the acceleration method achieves the test effect on the premise of saving time, greatly shortens the test time, has high reliability and strong practicability, has obvious use advantages, effectively reduces test resources and reduces manpower and material resources in the research and development process of the storage battery; has obvious use advantages, remarkable economic and social benefits, meets the national industrial technology upgrading policy guide and strategic requirements, and has great social and economic significance.
Drawings
Fig. 1 shows a schematic diagram comparing the effect of the inventive battery life test method for 30% depth of discharge with the conventional method.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a method for testing the service life of a storage battery with 30% depth of discharge, which is used for testing the storage battery with 30% DOD (depth of discharge), and comprises the following steps:
the method comprises the following steps: ensuring that the temperature of the storage battery to be tested is discharged at 35 ℃, and adopting 0.3C during discharging10Discharging for 1 hour, or when the discharge reaches the cut-off voltage of 1.8V/monomer, the discharge can be considered to be finished;
specifically, in order to ensure that the temperature of the storage battery to be tested is 35 ℃, the storage battery to be tested is kept still for 24-36 hours in the environment of 35 ℃ so that the temperature of the storage battery reaches 35 ℃, the temperature variation deviation of +/-1% can be achieved, and meanwhile, the temperature is ensured to be kept stable in the testing process, and the temperature variation deviation is +/-1%.
Step two: after the discharge in the first step is finished, a constant voltage of 2.4-2.55V and a current limit of 0.35-0.45C are used10Charging the storage battery for 1.5-2.5 hours;
step three: circularly performing the operations of the first step and the second step to a preset number of times, and performing constant pressure of 2.35V/monomer at each 30 times of circulation, wherein the flow limiting value is 0.15C10Continuously charging the storage battery for 12 hours;
step four: carrying out 10-hour rate capacity detection on the storage battery;
specifically, the performing of the 10-hour rate capacity test comprises 0.1C10Constant current discharge to 1.8V/monomer, constant voltage of 2.35V/monomer, and current limiting of 0.15C10Charging for 16 hours.
Step five: and circularly performing the first step to the fourth step until reaching a preset number of times or reaching a preset residual capacity of the storage battery.
The method can effectively save the test time of the storage battery life test, the test method provided by the invention is combined with a Lean Six-Sigma quality management tool (Lean Six Sigma, abbreviated as LSS, is the combination of Lean production and Six-Sigma management, and essentially eliminates waste) to carry out experimental design, suspension fluctuation is carried out according to the latest test method in the storage battery industry, test factors and test level numbers are determined, the experimental design is used for determining the experimental method, and finally the test process is determined. And verifying the new process again, and determining a final test method when the test result is identical with the design result.
To demonstrate the effectiveness of the method of the present invention, the present invention is illustrated by tests, which select a 2V200Ah battery for communication and a 2V200Ah battery for 30% DOD, and finally generalize the method to the entire battery system for communication, which is suitable for all types of batteries.
Summarizing and analyzing historical data of deep circulation of the lead-acid storage battery by combining a lean six-sigma management tool, carding statistical test indexes, determining that 30% DOD of a 2V200Ah battery is tested 1500 times at 35 ℃, testing the residual capacity of the battery after circulation, and finishing the test and analyzing the data when the circulation times reach requirements or the residual capacity of the battery is lower than 80%;
in order to achieve accurate test data, consistency selection is carried out on the test batteries, the batteries with high consistency are selected for the test, the consistency indexes are weight, capacity, internal resistance, open-circuit voltage and the like which are all within 5 per thousand, and the appearance of the batteries is intact.
The precision of a microcomputer cyclic charge and discharge tester and a thermostat (constant temperature water bath) device is confirmed, the test error of the battery is reduced, and the precision of test data is ensured;
and (3) testing: testing of battery life at 30% DOD (depth of discharge)
1.1: conventional methods test (prior art method):
(1) the fully charged 2V200Ah battery is kept stand for 24-36 hours at the temperature of 35 ℃ to ensure that the temperature of the battery is 35 ℃;
(2) 0.15C for given battery cycle process10Discharging for 2 hours, constant voltage 2.35V/monomer, current limiting 0.3C10Charging for 3 hours is a cycle;
(3) repeating the step (2) for 30 cycles;
(4) full charge at every 30 cycles, charge conditions: constant pressure of 2.35V/monomer and flow limiting value of 0.15C10The continuous charging time is 12 hours;
(5) repeating the steps (2) to (4) to reach the preset times, wherein the invention is exemplified by taking 60 times as the preset times, and 60 cycles are performed in total;
(6)10 hour rate capacity test: 0.1C10Constant current discharge to 1.8V/monomer, constant voltage of 2.35V/monomer, and current limiting of 0.15C10Charging for 16 hours;
(7) and (5) repeating the steps (2) to (6), and ending when the circulation times reach the requirement or the residual capacity of the battery is lower than 80%.
1.2: accelerated method test (method of the invention):
(1) the fully charged 2V200Ah battery is kept stand for 24-36 hours at the temperature of 35 ℃ to ensure that the temperature of the battery is 35 ℃;
(2)0.3C10discharging for 1 hour, or stopping when the discharge reaches the voltage of 1.8V/monomer,
(3) constant pressure of 2.4-2.55V and current limiting of 0.4C10Charging for 2 hours;
(4) repeating the steps (2) and (3) for 30 cycles;
(5) full charge every 30 cycles, i.e.: constant pressure of 2.35V/monomer and flow limiting value of 0.15C10The continuous charging time is 12 hours;
(6) repeating the steps (2) to (5) to reach the preset times, wherein the invention is exemplified by taking 60 times as the preset times, and 60 cycles are performed in total;
(7)10 hour rate capacity test: 0.1C10Constant current discharge to 1.8V/monomer, constant voltage of 2.35V/monomer, and current limiting of 0.15C10Charging for 16 hours;
(8) and (5) repeating the steps (2) to (7), and ending when the circulation times reach the requirement or the residual capacity of the battery is lower than 80%.
From the above tests, we can conclude that the table of the times used in the above tests is shown in the following table (1):
as can be seen from the above table (1), with the acceleration method of the present invention, in one cycle, 5 hours are required for the conventional method and 3 hours are required for the acceleration method for the 30% DOD test, so that two hours can be saved at one time.
Table (2) is a battery consistency selection data table, which records the relevant information of internal resistance and open circuit voltage of the test battery in the test process in the test, as shown in the following table (2):
the test result of the test method is shown in fig. 1, wherein fig. 1 is a comparison graph of 30% DOD cycle test data, and as can be seen from fig. 1, the effect of the method for testing the service life of the storage battery is basically the same as that of the conventional method, but the acceleration method of the invention achieves the test effect on the premise of saving time, greatly shortens the test time, and has high reliability, strong practicability and obvious use advantages; in addition, testing resources are effectively reduced, and manpower and material resources in the research and development process of the storage battery are reduced; has obvious use advantages, remarkable economic and social benefits, meets the national industrial technology upgrading policy guide and strategic requirements, and has great social and economic significance.
In addition, the experiment of the invention needs to be supplemented with the following attention: the final failure modes of the battery unit under the conventional test and the battery unit under the accelerated test are the same; the test unit meets the requirements of test production standards, and the performance consistency reaches 1%; the temperature is kept stable in the testing process, and the temperature variation deviation is +/-1%; the precision of the charging and discharging equipment is maintained stably, the occurrence of faults is avoided, the running condition of the equipment needs to be checked periodically, the instrument needs to be maintained periodically, and the measurement precision is 5 per thousand; and analyzing the measurement system, wherein the measurement system meets the test requirement, and the deviation is not more than 1 per thousand. .
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. A method for testing the service life of a storage battery with 30% depth of discharge is characterized in that: the test method comprises the following steps:
the method comprises the following steps: ensuring that the temperature of the storage battery to be tested is discharged at 35 ℃, and adopting 0.3C during discharging10Discharging for 1 hour, or when the discharge reaches the cut-off voltage of 1.8V/monomer, the discharge can be considered to be finished;
step two: after the discharge in the first step is finished, a constant voltage of 2.4-2.55V and a current limit of 0.35-0.45C are used10Charging the storage battery for 1.5-2.5 hours;
step three: circularly performing the operations of the first step and the second step to a preset number of times, and performing constant pressure of 2.35V/monomer at each 30 times of circulation, wherein the flow limiting value is 0.15C10Continuously charging the storage battery for 12 hours;
step four: carrying out 10-hour rate capacity detection on the storage battery;
step five: and circularly performing the first step to the fourth step until reaching a preset number of times or reaching a preset residual capacity of the storage battery.
2. A battery life test method for 30% depth of discharge, according to claim 1, characterized in that: and the storage battery to be tested is kept still for 24-36 hours at 35 ℃ under the environment of 35 ℃ to ensure that the temperature of the storage battery to be tested reaches 35 ℃ and the temperature variation deviation is +/-1%.
3. A battery life test method for 30% depth of discharge, according to claim 2, characterized in that: the performing of the 10 hour rate capacity test comprises 0.1C10Constant current discharge to 1.8V/monomer, constant voltage of 2.35V/monomer, and current limiting of 0.15C10Charging for 16 hours.
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Application publication date: 20200414 |