BS EN 50342-7:2015 pdf download – Lead acid starter batteries Part 7: General requirements and methods of tests for motorcycle batteries
The cranking current is the discharge current l.. measured in A to be indicated by the manufacturer which abattery can supply at -18 °C according to 7.3.
The charge retention is the ability of a battery to maintain the cold cranking performance after open circuitstorage for a certain time under increased temperature conditions (see 7.5).
The endurance reflects the ability of a battery to perform repeated dischargelrecharge cycles under specifictest conditions (see 7.4).
5.1.5 Water consumption
The water consumption is the loss in weight of a battery measured in g / (Ah C1o.) during overchargeconditions (see 7.6).
lf a test needs to be carried out in a water basin, the following conditions shall be fulfilled.The terminal base ofthe battery shall be at least 15 mm, but not more than 25 mm, above the level of the water. If several batteriesare in the same water bath, the distance between them and the distance to the walls of the bath shall be atleast 25 mm.
5.2Sampling of batteries
All tests shall be carried out on new battery samples. Samples shall be considered as new no longer than
. 30 days after the acid filling and formation date in the case of filled and charged batteries,
. 60 days after shipment date of the manufacturer in the case of dry-charged batteries.
Out of different production or sampling lots, five batteries shall be selected for testing.Four of these batteriesshall be used for the tests. In case of equipment failures or technical deviations, one battery can be replacedto repeat the complete sequence for this battery.
Refer to EN 50342-1.
6 Test sequence
The test sequence for the four required samples is shown in Table 1.
First the batteries have to pass the test steps 1 to 7.The requirements of Cto capacity check and crankingperformance test have to be fulfilled at least once for each sample. lf the requirements are fulfilled in the firstor second capacity check / cranking performance test the following capacity checks / cold cranking tests don’thave to be completed.
Only if the Cto capacity check and the cold cranking test are successful, the test sequence shall be continuedwith steps 8 to 11.These tests shall commence no later than one week after competition of steps 1 to 7.
7 Inspections and test procedures
7.1Charging of batteries
All tests shall commence with fully-charged batteries unless stated differently. Batteries shall be considered asfully-charged if they have undergone the following charging procedures.
Prior to start of the complete test sequence (according to Clause 6) the charging time shall be limited to 16h.
In case of recharging after a test for cold cranking performance (according to 7.3) the charging time may belimited to 16 h.
lf not specified differently by the manufacturer, the following charging methods shall be used.7.1.2 Flooded batteries
The battery shall be charged at a voltage of 16,00 V±0,10 V for 24 h with the maximum current limited to 2,5times l. The battery temperature shall be maintained in the range of 25°℃ to 35°℃. lf necessary anappropriate environmental control system like a water bath shall be used.
7.1.3 Valve regulated batteries (VRLA)
The battery shall be charged at a voltage of 14,80 V±0,10 V for 24 h with the maximum current limited to 2.5times lo. The battery temperature shall be maintained in the range of 25°C to 35°℃. lf necessary anappropriate environmental control system like a water bath shall be used.
7.2 C 10e capacity check
7.2.1 Throughout the duration of the tests, the battery shall be placed in a water bath maintained at a temperature of 25 °C ± 2 °C (see 5.1.6).
7.2.2 The battery shall be discharged with the current I10 (calculated according to 5.1.1) kept constant at ± 1 % of the nominal value until the terminal voltage falls to 10,50 V ± 0,05 V. The duration t [h] of this discharge shall be recorded. The beginning of the discharge shall take place within a period of 1 h to 5 h from the time of the end of charging.