battery

Lithium-ion batteries currently have liquid lithium-ion battery (LIB) and polymer lithium-ion battery (PLB) types. Among them, the liquid lithium ion battery refers to a secondary battery in which the Li + intercalation compound is a positive electrode and a negative electrode. The positive electrode employs lithium compounds - lithium cobaltate, lithium manganate, and the negative electrode employs a lithium-carbon intercalation compound. Lithium-ion batteries are ideal energy carriers for development in the 21st century because of their high operating voltage, small size, light weight, high energy, no memory effect, no pollution, low self-discharge, and long cycle life.
In 1992, Sony successfully developed lithium-ion batteries. Its practical application has greatly reduced the weight and volume of portable electronic devices such as mobile phones and notebook computers. The use time is greatly extended. Since lithium-ion batteries do not contain heavy metal cadmium, the pollution to the environment is greatly reduced compared to nickel-cadmium batteries.
Lithium battery pollution is still there, but it is relatively small.
Lithium batteries generally have two appearances: cylindrical and square. The spiral wound structure is used inside the battery, and a very fine and highly pervious polyethylene film is used to separate the positive and negative electrodes. The positive electrode includes a current collector composed of lithium cobaltate (or lithium nickel cobalt manganese oxide, lithium manganate, lithium iron phosphate, etc.) and aluminum foil. The negative electrode consists of a current collector consisting of a graphitized carbon material and a copper foil. The battery is filled with organic electrolyte solution. In addition, a safety valve and a PTC element (partially cylindrical) are installed to protect the battery from damage in abnormal conditions and output short circuit.
The voltage of a single-cell lithium battery is 3.7V (3.2V for a lithium iron phosphate cathode), and the battery capacity cannot be infinitely large. Therefore, a single-cell lithium battery is often subjected to serial and parallel processing to meet the requirements of different occasions.

With the development of the microelectronics technology in the 20th century, miniaturized equipment has been increasing, placing high demands on power supplies. Lithium batteries have subsequently entered a large-scale practical stage. Lithium-ion batteries have been widely used in portable appliances such as laptops, video cameras, and mobile communications because of their unique performance advantages. The development of large-capacity lithium-ion batteries has begun trials in electric vehicles and is expected to become one of the main power sources for 21st-century electric vehicles. It will also be used in sideboard satellites, aerospace and energy storage applications. With the shortage of energy and the pressure of the world's environmental protection. Lithium is widely used in the electric vehicle industry, especially the appearance of lithium iron phosphate battery, which further promotes the development and application of lithium battery industry.

 

Battery product testing range

 

                                                                                                                                                                                                                                

One battery	Ordinary dry cell, alkaline zinc manganese cell, lithium manganese cell zinc silver cell, zinc air Battery, Lithium Iodide Battery...
Secondary nickel battery	NiCd, NiMH...
Mobile Lithium Battery	Lithium ion, Lithium polymer battery...
Various digital secondary batteries	Laptop battery, digital camera battery, camcorder battery, various cylindrical batteries, wireless Communication batteries, portable DVD batteries, CD and MP3 player batteries, tablet battery, etc...
Borders: 0px currentColor; border-image: none;	Automotive starter lead-acid batteries, fixed lead-acid batteries, small valve-regulated lead seals Acid battery...
Powered Secondary Battery	Batteries for Power Vehicles, Batteries for Electric Road Vehicles, Batteries for Power Tools, Hybrids Power car battery...

                                                                                                                                                                    

Range/Region	Certification Project	Product	Test Standard
Global	UN38.3	Lithium Battery	S/SG/AC.10/11 UN Danger Section 38.3 Dangerous Goods Transport Simulation Test
EU	CB or IEC/EN Report	Portable secondary batteries and batteries	IEC/EN62133, IEC/EN60950
	CB	Portable secondary lithium battery and battery	IEC61960
		Electric vehicle traction secondary battery	IEC61982，IEC62660
	CE	battery	EN55022,EN55024
North America	UL	Lithium battery cell	UL1642
		Domestic and commercial batteries	UL2054
		Power Battery	UL2580
		Energy storage battery	UL1973
	FCC	battery	Part 15B
Japan	PSE	Sealed small secondary battery	JIS C 8712
		Lithium batteries and battery packs for portable electronic devices	JIS C 8714
Russia	Gost	Lithium batteries/batteries	12.02-007,12-88
Korea	KC	Lithium batteries/batteries	K62133
Thailand	TISI	Lithium batteries/batteries	TIS 2217-2548(2005)
Australia	C-Tick	battery	CISPR22, CISPR24
China	CQC	Lithium battery for cellular phone	GB/T 18287,GB/T 18288

Battery test standards

 Environmental testing

Low pressure

Temperature cycling

Thermal abuse

 Electric Testing

 Rated capacity      Discharge performance

 Over discharge     Over charge

 Forced discharge     High-rate charging

 External short circuit    Endurance

    Charge relenition and recovery     Internal resistance

  Environmental testing

 Vibration

  Mechanical shock

  Free fall

 Crush

  Impact
  Electrostatic discharge

 EMC testing

  Electrochemical analysis

  Battery materials analysis