TEST REPORT IEC 61427:2005 Secondary cells and batteries for photovoltaic energy systems (PVES) General requirements and methods of test

Transcription

1 age 1 of 13 Ref. No: SCC Report TEST REORT Secondary cells and batteries for photovoltaic energy systems (VES) General requirements and methods of test Report reference No...: SCC Tested by (+ signature)..: Reviewed by (+ signature)..: Approved by (+ signature) : Date of issue : Number of pages (Report).: Apr. 15, Testing laboratory Name.... : Address... : CHINA CEREI (SICHUAN) LABORATORY. No.45 Wenming Dong Road Longquanyi Chengdu R. China Testing location... : Same as above Client Name... : Address... : Sunstone ower Industry Co., Ltd Room 711, Liwan Building, Qianhai Road, Nanshan Dist. Shenz China Test specification Standard...: Test procedure...: rocedure deviation...: Non-standard test method...: Commission N.A. N.A. Test report form/blank test report Test report form No : Master TRF : Copyright blank test report.. : SCC61427 Reference No.61427,dated 2005 Copyright reserved to the bodies participating in the IECEE CB and/or the bodies participating in the CENELEC Certification Agreement(CCA).

2 age 2 of 13 Test item Description.. : Trademark : Model and/or type reference : Manufacturer.: Rating(s).: Battery OG Sunstone ower Industry Co., Ltd 2500AH Testing Date of receipt of test item : Date(s) of performance of test: Apr. 2, 2014 Apr. 2, 2014 Apr. 15, 2014 test case verdicts Test case does not apply to the test object... : N (Not Applicable) Test item does meet the requirement...: (ass) Test item does not meet the requirement... : F (Fail) General remarks This test report shall not be reproduced except in full without the written approval of the testing laboratory. The test results presented in this report relate only to the object tested. "(see remark #)" refers to a remark appended to the report. "(see appended table)" refers to a table appended to the report. Throughout this report a comma is used as the decimal separator. Brief description of the tested sample(s): Ambient temperature: 25 humidity: 60% Complete test was conducted on OG OG2-100, OG2-150, OG2-200, OG2-250, OG2-300, OG2-350, OG2-420, OG2-490, OG2-500, OG2-600, OG2-770, OG2-800, OG2-1000, OG2-1200, OG2-1500, OG2-2000, OG2-2500, OG are series products. roduct Description: Stationary vented lead-acid batteries with tubular positive plate

3 age 3 of 13 1 Scope This International Standard gives general information relating to the requirements of the secondary batteries used in photovoltaic energy systems (VES) and to the typical methods of test used for the verification of battery performances. 3 Terms and definitions For the purpose of this document, the definitions and terms for secondary cells and batteries given in IEC , and those for photovoltaic generator systems given in IEC apply. 4 Conditions of use This clause specifies the particular operating conditions experienced by secondary batteries in photovoltaic applications during their use. 4.1 hotovoltaic energy system The photovoltaic energy system with secondary batteries referred to in this standard can supply a constant, variable, or intermittent energy to the connected equipment. This system may include hybrid or grid-connected systems. The connected equipments may be pumps, refrigerators, lighting systems, communication systems, etc. Lighting systems 4.2 Secondary cells and batteries Secondary cells and batteries mainly used in Valve-regulated, including those photovoltaic energy systems are of the following with partial gas recombination types: The cells and batteries can normally be delivered in the following conditions: Charged and filled For optimum service life, the battery manufacturer s instructions for initial charge of the battery shall be followed. ass muster 4.3 General operating conditions Batteries in a typical V system operating under average site weather conditions may be subjected to the following conditions: Autonomy time The battery is designed to supply energy under ass muster

4 age 4 of 13 specified conditions for a period of time, typically from 3 days to 15 days, with or without solar irradiation Typical charge and discharge currents The charge current generated by the photovoltaic generator and the discharge current determined by the load are shown in Table Daily cycle The battery is normally exposed to a daily cycle as follows: a) charging during daylight hours; b) discharging during night-time hours. A typical daily usage results in a discharge between 2 % to 20 % of the battery capacity Seasonal cycle The battery may be exposed to a seasonal cycle of state of charge. This arises from varying average- charging conditions as follows: - periods with low solar irradiation, for instance during winter causing low energy production. The state of charge of the battery (available capacity) can go down to 20 % of the rated capacity or less; - periods with high solar irradiation, e.g. in summer, which will bring the battery up to the fully charged condition, with the possibility that the battery could be overcharged eriod of high state of charge During summer for example, the battery will be operated at a high state of charge (SOC), typically ass muster between 80 % and 100 % of rated capacity. A voltage regulator system normally limits the maximum battery voltage during the recharge period. The system designer normally chooses the maximum charge voltage of the battery as a compromise allowing to recover to a maximum state of charge (SOC) as early as possible in the summer season but without substantially overcharging the battery. The system designer normally chooses the maximum charge voltage of the battery as a ass muster

5 age 5 of 13 compromise allowing to recover to a maximum state of charge (SOC) as early as possible in the summer season but without substantially overcharging the battery. The expected life-time of a battery in a V system even kept regularly at a high state of charge may be considerably less than the published life of the battery used under continuous float charge. ass muster eriod of sustained low state of charge During periods of low solar irradiation, the energy produced by the photovoltaic array may not be sufficient to fully recharge the battery. The state of charge will then decrease and cycling will take place ass muster at a low state of charge. The low solar irradiation on Comply with the requirements the photovoltaic array may be a result of the geographical location combined with the winter periods, heavy clouds, rains or accumulation of dust on photovoltaic array Electrolyte stratification Electrolyte stratification may occur in lead-acid batteries. In vented lead-acid batteries, electrolyte stratification can be avoided by electrolyte agitation or periodic overcharge whilst in service. In valve ass muster regulated lead-acid (VRLA) batteries, electrolyte Comply with the requirements stratification can be avoided by design or by operating them according to the manufacturer s instructions Storage Manufacturers recommendations for storage shall be observed. In the absence of such information, the storage period may be estimated according to the climatic conditions as shown in Table 2 as below. With electrolyte, a lead-acid or nickel-cadmium battery shall be stored at full state of charge. A loss of capacity may result from exposure of a battery to high temperature and humidity during storage Operating temperature The temperature range during operation experienced by the battery at the site is an important factor for the

6 age 6 of 13 battery selection and the expected lifetime (see IEC for definitions of climatic conditions). Manufacturers recommendations for operating temperatures and humidity shall be observed. In the absence of such information, operating temperatures and humidity may be those shown in Table Charge control Excessive overcharge does not increase the energy stored in the battery. Instead, overcharge affects the water consumption in vented batteries and consequently the service interval. In addition, valve-regulated lead-acid batteries may dry out resulting in a loss of capacity and / or overheating. Overcharge can be controlled by use of proper charge controllers. Vented lead-acid or nickel-cadmium batteries including those with partial gas recombination shall have sufficient electrolyte to cover at least the period between planned service visits. Overcharge in ass muster valve-regulated lead-acid batteries shall be carefully controlled to reach optimum lifetime. The water consumption is measured during the cycle test (see 8.4.5) and can be used together with the system s design information to estimate the service intervals hysical protection hysical protection shall be provided against consequences of adverse site conditions, for example, against the effects of: - uneven distribution and extremes of temperature; - exposure to direct sun light (UV radiation); - air-borne dust or sand; - explosive atmospheres; - flooding, water vapor condensation and water spray; - earthquakes; - shock and vibration (particularly during transport 5 General requirements 5.1 Mechanical endurance

7 age 7 of 13 Batteries for photovoltaic application shall be designed to withstand mechanical stresses during normal transportation and handling. Additional packing or protection shall be used for off-road conditions. articular care shall be taken while handling unpacked batteries. Manufacturer s instructions shall be observed. In case of specific requirements regarding mechanical stresses, such as earthquakes, shock and vibration, these shall be individually specified or referred to the relevant standard. 5.2 Charge efficiency The charge efficiency is the ratio between the quantity of electricity delivered during the discharge of a cell or battery and the quantity of electricity necessary to restore the initial state of charge under specified conditions (see IEV ). Where no data are available from the battery manufacturer, the following efficiencies as given in Table 4 may be assumed. 5.3 Deep discharge protection Lead-acid batteries shall be protected against deep discharge to avoid capacity loss due to irreversible sulphation. This could be achieved by using a system which monitors the battery voltage and automatically disconnects the battery before it reaches its maximum depth of discharge Nickel-cadmium batteries do not normally require this type of protection. 5.4 Marking Cells or monobloc batteries shall follow the instructions of the applicable standards defined in clause Safety Refer to applicable local regulations and the manufacturer s instructions for procedures to be observed during installation, commissioning, operation, taking out of service, and disposal. 5.6 Documentation

8 age 8 of 13 Refer to the manufacturer's documentation for transport and storage, commissioning, putting into service, operation and maintenance. The manufacturer shall advise if there are special considerations for the initial charging of batteries with only the photovoltaic array available as the power source. Comply with the requirements 6 Functional characteristics The batteries shall be characterized by their: rated capacity (see 8.1); 2500AH endurance in cycling (see 8.2); charge retention (see 8.3); cycling endurance in photovoltaic application (extreme conditions) 7 General test conditions 7.1 Accuracy of measuring instruments When testing batteries, the parameters and accuracy values shall be in accordance with relevant clauses of the IEC standards listed in 7.2. The accuracy of the measuring instruments shall be in compliance with the relevant IEC standard listed in reparation and maintenance of test samples IEC for nickel cadmium Test samples shall be prepared in accordance with the prismatic rechargeable single following established procedures in the following cells with partial gas standards: recombination. 8 Test method 8.1 Capacity test Test samples shall be set up in accordance with the applicable standards in 7.2. Tests to verify the rated capacity shall be performed using a current of I10 (A) ass muster for lead-acid batteries and It/5(A) for nickel-cadmium 2500AH batteries according to the relevant clauses in the IEC standards listed in Endurance in cycle test

9 age 9 of 13 Test samples shall be cycled according to the applicable standards described in Charge retention test Test samples shall follow the procedures of the applicable standards described in Cycle endurance test in photovoltaic application (extreme conditions) In photovoltaic applications the battery will be exposed to a large number of shallow cycles but at different states of charge. The cells or batteries shall therefore comply with the requirements of the test below, which is a simulation of the photovoltaic energy system operation. The cycle endurance test is an accelerated simulation in extreme conditions of the battery operation in a photovoltaic energy system and shall be conducted by submitting the cells or monobloc batteries to a period of 150 cycles (50 cycles with the phase A and 100 cycles with the phase B). Test samples shall be set up in accordance with the applicable standards listed in 7.2 after control of the capacity test in 8.1. Start the test with the battery fully charged. Bring the battery to a temperature of 40 C ± 3 C and stabilize for 16 h. Maintain the battery at 40 C ± 3 C throughout the test Capacity check After the phase B, the battery is cooled down to the temperature defined in the relevant standard as described in 7.2 and stabilized at this value for 16 h. The capacity test (C10 for lead-acid batteries and C5 for nickel-cadmium batteries) is carried out according to the relevant standard as described in End of test condition Capacity is checked after each period of 150 cycles (phases A + B). The value of actual capacity determined in shall be recorded. The cycle life shall be expressed in number of 150 cycle (A+B) sequences completed.

10 age 10 of 13 The test is finished: Water consumption of flooded battery types and cells with partial gas recombination During the cycle endurance test, vented type cells or monoblocs may be topped up with water. The amount of water added shall be measured and reported Requirements The number of complete cycle sequences (150 cycles) achieved at the end of the test shall be not less than the value stated by the manufacturer. ass muster 9 Recommended use of tests 9.1 Type test Type tests are: the rated capacity test and the charge retention test; the endurance test in cycling; the cycling endurance test in photovoltaic application (extreme conditions). The minimum number of cells or monobloc batteries shall be as specified in the relevant standards listed in 7.2. The cycling endurance test in photovoltaic application shall be performed with a minimum of six cells or 2 monobloc batteries. 9.2 Acceptance test Factory test The acceptance test shall be agreed between the customer and the supplier. Compliance to marking, labelling or to the rated capacity may be verified. ass muster Commissioning test A commissioning test is recommended to prove the integrity of the installed battery system by means of a capacity test. ass muster

11 age 11 of 13 hotos of the sample icture 1 icture 2

12 age 12 of 13 LIST OF INSTRUMENTS NO Equipment name Type Serial NO period of validity 1 Digital AC ower Source 6200 series Angui Radiation Tester 440RF/D Angui Line Leakage Tester 7620 Angui Electrical Safety Compliance analyzer 7452 Angui Safely-testing instrument ST-1001 Angui Digital display caliper 0.01 mm Angui Dual display LCR instrument ELC-131D Angui Impact testing hammer ST-1002 Angui Surge-insulation tester NF2675 Angui Lecroy Oscillocope Storage 9304A Angui Trillion-Ohm Instrument ZC25B-3 Angui Digital temperature tester DR030 Angui rogram control combustion Instrument CS-1 Angui Torque driver RTD60CN Angui Digital micrometer Angui ushing ergometer Tube-shaped KL-10 Angui Noncontact thermometer ST60 Angui

13 age 13 of Dynamometer KL-2 Angui Dynamometer TK-30 Angui Alternating Moisture testing instrument Measuring instrument for temperature raise of live windings SDJ020 Angui RC-3 Angui Audio analyzer V-7720A YL FM/AM signal generator V-8179B10 YXH FM/AM signal generator V-8179B10 YXH Frequency counter 500A YL Muitiplex modulator srereo V-7633A YQT WOW flutter meter MK-668E YDBW

14 Notice 1. This test report shall be invalidation without the cachet of the testing laboratory. 2. This copied report shall be invalidation without sealed the cachet of the testing laboratory. 3. This report shall be invalidation without tester signature, reviewer signature and approver signature. 4. This altered report shall be invalidation. 5. Client shall put forward demurrer within 15days after received report. The testing laboratory shall refuse disposal if exceeded the time limit. 6. The test results presented in this report relate only to the object tested. Tel: Fax: ost code: Add : No.45 Wenming Dong Road Longquanyi District, Chengdu, Sichuan.