Battery testing is an important part of ensuring battery safety and reliability. Since the battery itself has some risks (such as short circuit, leakage, corrosion leakage, etc.), the detection process also hides various security risks. In the research process, there is often a need for fast charging, current charging and charging systems, and environmental simulation tests. It is useful to carry out a thorough inspection to ensure the safety of the battery laboratory and to ensure the safety of the laboratory staff and the safety of the equipment.
Design of battery tester
First degree
Battery testers can be divided into four types:
visual inspection;
Nature research includes shape, polarity, aspect and quality, etc.
Electrical performance testing;
Electrical performance tests include room temperature discharge capacity, room temperature discharge capacity, charge retention and recovery capacity, safety and lifetime, etc.
Environmental Change Performance Testing
The environmental change test includes high and low discharge capacity, high temperature simulation, constant humidity, resistance to vibration and salt spray, etc.
Safety test
Safety performance tests include mechanical shock, drop, need, crush, collision, thermal shock, thermal cycling, external heat, water absorption, overrun, overrun, external short circuit and thermal abuse, etc.
Second level
The above tests can be divided into three types of tests which are as follows:
Common usage tests
Common usage tests include high pressure simulation, thermal cycling, vibration, and low pressure loading.
Predictive Mistakes Test
Visual usability tests include external short circuit, strong impact, shock, interruption, power failure, negative charge, negative installation, discharge, overcharge, and charge is high.
Error testing
These last two types of tests are more dangerous than conventional tests.
There may be risks of battery testing
Once the battery is used or stored improperly, there may be a fire or explosion. Additionally, there are some safety risks in using test equipment.
Fire / Explosion
Battery explosion is usually caused by external factors such as needle sticking, extrusion, overloading, high temperature and short circuit, resulting in internal short circuit or external circuit of the battery, resulting in reaction chemical reaction between the electrode material and the electrolyte. Such as solid electrolyte fracture interface membrane (SEI) decay, oxidation, reduction of organic electrolyte and positive electrode decay. The oxygen generated by the destruction of the positive electrode is regenerated by an organic electrolyte solution or the like.
If the high heat produced by these reactions cannot be dissipated in the environment in time, it will probably lead to heat escape, which will eventually burn and explode the battery.
Leaks and leakage
Lead acid batteries use dilute sulfuric acid as an electrolyte and are biodegradable. During the detection process, if the battery cell is broken and the electrolyte is leaking, it will cause great danger to the workers and equipment.
Lithium-ion batteries use organic electrolytes, such as gases released in safety tests, irritating and toxic substances.
Mechanical hazards
Tests such as mechanical shocks, strong shocks, shocks, collisions and falls can loosen the clamp, causing the battery to be discharged and harming the operator. In addition, the work of the above-mentioned mechanical equipment itself presents some risks.
Electrical hazards
Testing of electronic properties such as energy and lifetime requires continuous equipment operation for a long time and has some safety risks. Also, during the battery connection process, the battery may be reversed or shorted.
Protection of people
The protection of workers is a top priority. The monitor interacts directly with the samples and equipment and is a safety advocate. It is also under security protection. Take all possible measures to ensure the safety of employees. Minimize contact and don’t touch if you can’t touch it.
Staff training should be enhanced to improve safety awareness and competence. It is important to prepare protective equipment. The wearing of protective equipment to perform unsafe or dangerous work inspections is strictly prohibited. Monitoring and testing areas should be separated, using controlled equipment as much as possible.
Security check
The protection of the sample is done mainly during storage. Keep a dry environment at a stable temperature. Lock the electrodes to prevent accidental short circuit. Regular inspections should be done to ensure that hidden hazards are eliminated immediately. It is important to adjust the mask properly to avoid other effects.
Equipment safety
One thing, make sure that the device is working properly. On the other hand, it is important to prevent unexpected things that affect the device. Research and development should be strengthened. To load and unload test equipment, dust must always be removed. For equipment such as vibrating tables and impact tables, it is important to use regular dust and oil. Always check that the alarm function is normal. Safety equipment such as safety nets must be installed. For equipment that has been turned off for a long time, it is necessary to turn off the water and electricity.
Environmental protection
If conditions are not good in a closed test environment (eg lab environment), the test must be stopped. After obtaining evidence (such as taking pictures of smoke and fire), it must be properly extinguished and removed from the tank’s exhaust. The test room should be kept in a smoke-free place, which is equipped with fire extinguishers, sand boxes and hot water. Discarded batteries must be disposed of after safe evidence collection in accordance with the supplier’s instructions and relevant laboratory specifications, or handed over to a professional facility for reasonable disposal such as standards and procedures exist.
Summary
Laboratory protection can be initiated through control equipment and hardware. With the continuous development of battery detection technology, the continuous improvement of laboratory management standards, and the improvement of battery safety itself, the safety factors of the battery laboratory will continue to – increase.
The safety of equipment and equipment is the most important aspect of laboratory safety. Our environmental testing and battery testing facilities are well equipped. Examples: automatic detonation device, chain detonator, three-color fire protection device, remote control, smoke exhaust device, fire extinguishing device, etc.
