GB/Z 141-2025Secondary cells and batteries - Test methods for checking the performance of devices designed for reducing explosion hazards for lead-acid starter batteries (English PDF)

1 Scope

This document describes the test methods for verifying the device for reducing the explosion hazard of lead-acid starter batteries (hereinafter referred to as the "device"), and outlines the protective measures to be followed during the test.

This document applies to the performance testing of the device for reducing the explosion hazard of lead-acid starter batteries and battery packs.

2 Normative references

This document has no normative references.

3 Terms and definitions

This document does not contain any terms or definitions that need to be defined.

4 Protective measures

5 Safety precautions

WARNING. The testing equipment may explode. Strict safety precautions must be followed during the test to avoid personal injury.

5.1 The gas source, spark electrode and test fixture shall be completely enclosed in an explosion-proof test chamber with external ventilation (see Figure 1), which can be indirectly observed.

5.2 The battery charging equipment shall be located outside the explosion-proof test chamber for easy access by test personnel. The charging circuit shall be electrically isolated from the spark generation circuit and have two emergency disconnect switches.

The requirements for the emergency disconnect switches are as follows.

a) installed in a location easily accessible to test personnel;

b) a location at least 3 meters away from the explosion-proof test chamber.

These emergency disconnect switches shall only be used in emergency situations, as using them may damage certain types of charging equipment.

5.3 The test should preferably be conducted in an area of not less than 3 m2.When any circuit inside the explosion-proof test chamber is energized or may be energized, signs shall be posted to prohibit unauthorized personnel from entering the area.

5.4 During testing, the area where the explosion-proof test chamber is located shall be clearly marked, and all personnel who are not fully familiar with all safety precautions and who are not wearing protective equipment are prohibited from entering (see 5.6).

5.5 During the test, smoking, open flames, or any source of sparks unrelated to the test are strictly prohibited in the area where the explosion-proof test chamber is located. All lighting fixtures and accessories shall be explosion-proof.

5.6 Full-face protective gear shall be worn in the area where the explosion-proof test chamber is located. In addition, appropriate ear protection shall be worn to prevent exposure to the loud noise generated by a battery explosion.

5.7 A tester shall be stationed near the emergency disconnect switch for the spark-generating circuit and all circuits electrically isolated from the battery charging circuit.

5.8 The exhaust fan of the explosion-proof test chamber shall be in operation throughout the entire test period unless the test method requires it to be turned off (see Appendix B).

After each test, the exhaust fan shall be turned on, and the charging and spark generating circuits shall be interrupted for at least 5 minutes before personnel are allowed to enter.

During this period, it shall be ensured that all hydrogen gas is vented from the explosion-proof test chamber to prevent the possibility of a delayed explosion caused by a hidden flame.

WARNING. Hydrogen can burn without a visible flame.

5.9 A malfunction in the equipment may cause the battery to rupture, resulting in an electrolyte spill. Methods for handling spilled dilute sulfuric acid can be obtained from sulfuric acid suppliers, fire and rescue organizations, etc.

6 Preparations before the test