Specification for safety performance of lithium ion batteries for miner's lamps

Specification for safety performance of lithium ion batteries for miner's lamps
1 Scope This test specification specifies the terms and definitions, safety performance requirements, test methods and inspection rules for lithium ion batteries for miner's lamps.
This inspection specification applies to lithium ion batteries for miner's lamps (hereinafter referred to as batteries).
2 Normative references The following documents contain provisions which, through reference in this specification, constitute provisions of this specification. For dated references, all subsequent amendments (not including errata content) or revisions do not apply to this specification. However, parties to agreements based on this specification are encouraged to study whether they can use these documents. version. For undated references, the new version of Zui applies to this specification.
GB/T 2900.11-1988 Battery terminology (eqv IEC 486:1986)
ISO/IEC Guide 51 Security Section - Guidelines contained in the standard
3 Terms and Definitions The following terms and definitions established in GB/T 2900.11-1988 and ISO/IEC Guide 51 apply to this standard.
3.1
Lithium ion battery lithium-ion battery
It is a combination of one or more single-cell lithium-ion batteries and accessories, and can be used as a combination of power supplies. Includes enclosure, extreme and may contain electronic protection.
3.2
Charge limit voltage
According to the manufacturer's regulations, the battery is switched from constant current charging to constant voltage charging.
3.3
Final voltage
The load voltage of the battery at the end of discharge is specified, the value of which is specified by the manufacturer.
3.4
Leaking leakage
Visible leakage of liquid electrolyte.
3.5
Deflated venting
When the internal pressure in the battery increases, the gas is released through a pre-designed explosion-proof device.
3.6
Rupture rupture
Mechanical damage to the battery case due to internal or external factors causes internal material to be exposed or spilled but not ejected.
3.7
Fire
The battery has a visible flame.
3.8
Explosion explosion
The shell of the battery violently ruptured causing the main component to be ejected.
3.9
Reference test current
The reference test current is a 5 h rate discharge current.
Note: The reference test current is expressed in amps (A), I5A = C5Ah/5h.
4 Safety performance requirements
4.1 Extrusion BE-6045
The battery shall be tested in accordance with the provisions of 5.2.2 and shall not ignite or explode.
4.2 Thermal shock BE-101 series The battery shall be tested in accordance with the provisions of 5.2.3 and shall not ignite or explode.
4.3 Overcharge The battery shall be tested in accordance with the provisions of 5.2.4 and shall not ignite or explode.
4.4 Forced discharge The battery shall be tested in accordance with the provisions of 5.2.5 and shall not ignite or explode.
4.5 Short circuit BE-1000W
The battery shall be tested in accordance with the provisions of 5.2.6. It shall not ignite or explode. The external surface temperature of the battery shall not exceed 150 °C.
4.6 Acupuncture BE-9002
The battery shall be tested in accordance with the provisions of 5.2.7. It shall not ignite or explode. The temperature of the outer surface of the battery shall not exceed 150 °C.
4.7 Heavy impact BE-5066
The battery shall be tested in accordance with the provisions of 5.2.8 and shall not ignite or explode.
5 Test methods
5.1 Test conditions Unless otherwise specified, the tests in this standard shall be carried out under the following atmospheric conditions:
a) Temperature: 15 ° C ~ 35 ° C;
b) relative humidity: 45% to 75%;
c) Atmospheric pressure: 86 kPa to 106 kPa.
5.2 Security performance
5.2.1 Test conditions The following test is a simulation of the safety issues that may occur in the case of abuse of the battery.
The following tests shall be carried out in a device with forced exhaust conditions and explosion-proof measures. Except for 5.2.4 and 5.2.5, all batteries must be charged according to regulations before the test, and the test should be started within 24 hours after charging. The battery of the electronic protection device is externally installed, and the protection device should be removed when testing.
5.2.2 Squeeze Place the battery between the two extrusion planes of the extrusion equipment, gradually increasing the pressure to 13kN and maintaining the pressure for 1 min.
When the cylindrical or square battery is subjected to the extrusion test, its longitudinal axis is parallel to the extrusion plane and perpendicular to the extrusion direction. The square battery zui face is perpendicular to the extrusion direction. Each battery is only subjected to a squeeze test.
5.2.3 Thermal shock Place the battery in a hot box, raise the temperature to 130 °C ± 2 °C at a rate of (5 °C ± 2 °C) / min and keep it for 30 min, then take it out and return to room temperature.
5.2.4 Overcharge The test shall be carried out at an ambient temperature of 20 °C ± 5 °C. The battery is first discharged to the termination voltage with I5A current, the battery is placed in the fume hood, the battery is connected to the DC power supply, the output current of the battery is adjusted to 15I5A, the output voltage is not lower than 10V, the battery is continuously charged for 7h or the battery voltage is no longer increased. Big.
Internally installed rechargeable temperature or overcurrent protection device and battery that can not withstand high current. It can be used to charge the battery without causing the device to operate or the electrode is damaged. Until the battery voltage is no longer increased, continuous charging The time is not less than 7h.
5.2.5 Forced discharge The test is required to be carried out at an ambient temperature of 20 °C ± 5 °C. The battery was discharged to the termination voltage with an I5A current, and then the battery was reversely charged for 90 min at a current of 5I5A.
An internal battery with a recoverable temperature or overcurrent protection device can be used to reverse charge the battery without causing the device to operate until the terminal voltage of the battery is below 0.2V.
5.2.6 Short circuit The test shall be carried out at ambient temperatures of 20 °C ± 5 °C and 55 °C ± 5 °C, respectively. Place the battery with the thermocouple (the contact of the thermocouple is fixed at the center of the large surface of the battery) in the fume hood and the high temperature box. (The battery with a short circuit test of 55 °C ± 5 °C should be placed in the high temperature box first. 55 ° C ± 5 ° C for 1.5h ~ 2h), short circuit of its positive and negative, the total resistance of the line is not more than 100mΩ. The test was terminated until the battery load voltage was less than 0.1 V and the battery surface temperature returned to 10 ° C which was not higher than the ambient temperature. Three batteries were tested for each temperature.
Internally installed battery with recoverable temperature or overcurrent protection device, the positive and negative terminals of the battery can be short-circuited with a large load that does not cause the device to operate. 5.2.7 The needling test shall be carried out at an ambient temperature of 20 °C ± 5 °C. The battery with the thermocouple (the contact of the thermocouple is fixed on the large surface of the battery) shall be placed in a fume hood with a diameter of 3 mm. The rust steel needle pierces the center of the large surface of the battery zui at a speed of 20 mm/s to 40 mm/s and is kept for 1 min. 5.2.8 Heavy impact battery placed on a plane, a steel column of 15.8mm is placed in the center of the battery. The longitudinal axis of the steel column is parallel to the plane, allowing the weight of 9.1kg to fall freely from the height of 610mm to the center of the battery. Above the steel column.
Cylindrical or square cells, when subjected to an impact test, have a longitudinal axis that is parallel to the plane and perpendicular to the longitudinal axis of the steel column. The long axis of the square battery zui is perpendicular to the steel column, and the large surface of the zui is perpendicular to the impact direction. Each battery receives only one impact test.
6 Inspection rules
6.1.1 The samples to be inspected shall be randomly selected from a batch or batches that have passed the factory inspection.
6.1.2 The items, requirements, test methods and sample quantities of the inspection shall comply with the requirements of Table 1.

Table 1

6.1.3 When conducting inspections, the test items specified in Table 1 shall be carried out. In the case of a certain test, if one sample fails, the item is judged as unqualified; if one test fails, the test is unqualified. In the case of a certain test, if the sample is unqualified and affects other test items, the spare sample should be used for other items.

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