首页            产品服务    简介            标准        标准动向          召回预警       质量热点           法律法规       WTO/TBT通报        认证标志
实验室新闻      微博        检测须知        中国标准    IEC标准           技术前沿       产业新闻           运输规则       政策动向           国内政策法律
联系我们        帮助中心    对外合作        美国标准    日本标准          会议通报       电池知识           国内技术法规   国外技术法规       检测知识介绍
服务项目

IEC 62619《Secondary cells and batteries containing alkaline or other non-acid electrolytes – Safety requirements for secondary lithium cells and batteries, for use in industrial applications》

来源:吴江电池产品检测实验室 | 时间:2016-3-23 19:02:00 |  【字号:
 

8.2 Reasonably foreseeable misuse

试验项目

章节号

标准要求

External short circuit test (cell or cell block)

8.2.1

Fully charged cells are stored in an ambient temperature of 25 °C ± 5 °C. Each cell is then short circuited by connecting the positive and negative terminals with a total external resistance of 30 +/-10 mΩ.

The cells are to remain on test for 6 h or until the case temperature declines by 20 % of the maximum temperature rise, whichever is the sooner

Impact test (cell or cell block)

8.2.2

The test sample is to be placed on a flat surface. A 15,8 mm diameter bar is to be placed across the  centre of the sample. A 9,1 kg mass is to be dropped from a height of 61 ± 2,5 cm onto the bar  placed on the sample.

A cylindrical or prismatic cell is to be impacted with its longitudinal axis parallel to the flat surface and perpendicular to the longitudinal axis of the 15,8 mm diameter curved surface lying across the  centre of the test sample. A prismatic cell is also to be rotated 90 degrees around its longitudinal axis so that both the wide and narrow sides will be subjected to the impact. Each sample is to be subjected to only a single impact with separate samples to be used for each impact. (see figure 2)

Drop test (cell or cell block, and battery system)

8.2.3

The drop test is conducted on a cell or cell block, and battery system*. The test method and the height of the drop are determined by the test unit weight as shown in the table 2.

Whole drop test (cell or cell block, and battery system)

8.2.3.1

Each fully charged test unit is dropped three times from a height shown in table 2 onto a concrete floor.

In the case of the mass of test unit is less than 7kg, the test units are dropped so as to obtain impacts in random orientations. In the case of the mass of test unit is 7kg or more and less than 20 kg, the test shall be performed with the test unit dropped in the bottom down direction. The bottom surface of the test unit is specified by the manufacturer.

After the test, the test units shall be put on rest for a minimum of one hour and then 434 a visual inspection shall be performed.

Edge and corner drop test (cell or cell block, and battery system)

8.2.3.2

Each fully charged test unit is dropped two times from a height shown in table 2 onto a concrete floor.  The drop test conditions shall assure, with test arrangements as shown in Figure 3, Figure 4 and Figure 5 5, reproducible impact points for the shortest edge drop impact and the corner impacted. The two impacts, per impact type, shall be on the same corner and on the same shortest edge. For the corner and edge drops, the test unit shall be oriented in such a way that a straight line drawn through the struck corner/edge and the test unit geometric centre is approximately perpendicular to the impact surface.

Thermal abuse test (cell or cell block)

8.2.4

Each fully charged cell, stabilized at room temperature, is placed in a gravity or circulating air convection oven.

The oven temperature is raised at a rate of 5°C / min ± 2 °C /min to a temperature of 85 °C ± 5 °C. The cell remains at this temperature for 3h before the test is discontinued.

Overcharge test (cell or cell block)

8.2.5

The test shall be carried out at an ambient temperature of 25 °C ± 5 °C. Each test cell shall be discharged at a constant current of 0,2 It A to a final discharge voltage specified by the manufacturer. Sample cells shall then be charged with a constant current equal to the maximum specified charge current of the battery system until the voltage reaches the maximum voltage value that is possible when any single failure on the charge control or charge protection function occurs. Then, the charge is terminated. The voltage and temperature should be monitored during the test.

The test shall be continued until the temperature of the cell surface reaches steady state conditions (less than 10 °C change in a 30-minute period) or returns to ambient.

Forced discharge test (cell or cell block)

8.2.6

A discharged cell is subjected to a forced discharge at 1,0 It A for a test period of 90min. After the test period, a visual inspection shall be performed.

If the discharge voltage reaches the target voltage shown below within the test period, the voltage shall be kept at the target voltage by reducing the current for the remaining test period. The target voltage is determined as follows:

i. Battery system provided with redundant independent protection for discharge voltage control or the battery system has only single cell or cell block:

Target voltage = - (upper limit charge voltage of the cell)

ii. Battery system provided with only a single protection or less for discharge voltage control:

Target voltage = - [upper limit charge voltage of the cell × (n-1)].

n; the number of cells connected in series in the battery system.

8.3 Considerations for internal short-circuit 529 – Design evaluation

Internal short-circuit test (cell or cell block)

8.3.2

Refer to clause 8.3.9 of IEC 62133 Ed.2

The sample preparation procedure may be changed from the procedure outlined in IEC 62133 prior to performing the final pressing process with the corresponding charging procedure according to clause 542 8.3.9 of IEC 62133 Ed.2.

Propagation test (battery system)

8.3.3

The battery system is fully charged and then left until the cells stabilize at 25 °C ± 5 °C. One cell in the battery system is heated until the cell enters thermal runaway, for example, using resistive heating or through thermal conductive heat transfer using an external heat source. The method used to create a thermal runaway in one cell is to be described and documented in the test report. After thermal runaway in the cell is initiated, the heater is turned off and battery system is observed for 1 hour.

Other methods than the examples noted above to initiate thermal runaway in one cell are allowed. See normative Annex-1 for more details.

9 Functional safety (system safety)

Overcharge control of voltage (battery system)

9.2.2

The test shall be carried out in an ambient temperature of 25 °C ± 5 °C and under normal operating conditions with the cooling system (if any) operating (main contactors are closed with the battery system controlled by the BMU). Each test battery system shall be discharged at a constant current of 0,2 It A, to a final discharge voltage specified by the manufacturer. Sample batteries shall then be charged at the maximum current of the recommended charger with set voltage exceeding the upper limit charge voltage by 10% for each cell in the battery.

The exceeded voltage can be applied by an additional charger if it is difficult to do it by the original charger. Also the exceeded voltage can be applied to a part of the cell(s) in the battery system if it is difficult to do it in using the whole battery system.

The test shall be carried out until the BMU terminates the charge, which should occur before reaching 110 % of the upper limit charge voltage. Data acquisition/monitoring shall be continued for one hour after charge is stopped. All functions of the battery system shall be fully operational as designed during the test.

Overcharge control of current (battery system)

9.2.3

The test shall be carried out in an ambient temperature of 25 °C ± 5 °C and under normal operating conditions with the cooling system (if any) operating (main contactors closed with the battery system being controlled by the BMU). Each test battery system shall be discharged at a constant current of 0,2 It A, to a final discharge voltage specified by the manufacturer. Sample batteries shall then be charged at a current exceeding the maximum charge current by 20%. Data acquisition/monitoring shall be continued for one hour after charge is stopped. All functions of the battery system shall be fully operational as designed during the test

Overheating 661 control (battery system)

9.2.4

The test shall be carried out in an initial ambient temperature of 25 °C ± 5 °C and under normal operating conditions (main contactors are closed with battery system being controlled by the BMU) with the exception that the cooling system, if provided, shall be disconnected. Each test battery system shall be discharged at a constant current of 0,2 It A, to a final discharge voltage specified by the manufacturer. Sample batteries shall then be charged at the recommended current to a 50% state of charge. The temperature of the battery system shall be increased to 5 °C above the maximum operating temperature. The charge is continued at the elevated temperature until the BMU terminates the charge. Data acquisition/monitoring shall be continued for one hour after sequence is stopped (e.g. the BMU has terminated charge).

 

 

点击数:10343
- 打印 -                      - 关闭 -