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With the "ultimate energy" and "green energy" known as lithium-ion battery laptop battery, 90 years since the inception of the last century, from the electronic products in the button batteries, cell phone, DC class of digital products lithium battery to the electric car in the battery power has been increasingly widely used in people's production and life. Compared with other batteries, lithium-ion battery, whether from the size, the weight, or from the performance, all have a great advantage.
To use in a reasonable range of voltage is within the capacity of lithium batteries
One-sided pursuit of super-large capacity, ultra-high-voltage approach is wrong. First of all, everything must go through a simple to complex, from hard to easy process, like same flammable gases, effectively guarantee the safety of lighters is relatively easy, to effectively guarantee the safety of vehicle fuel tanks should much more difficult, still does not completely solve the collision situation when the car caught fire and exploded. In a limited volume of the energy accumulated inside the more the more hard to manage, at present, Suzhou Star Constant only ensure maximum 92P1089 battery 48V10Ah portfolio security. Second, the higher the voltage, the greater the capacity, protection circuitry and balanced circuit the greater the difficulty and failure rate, so do not advocate Suzhou Star Constant, does not support the combination of excess 48V10Ah battery.
Depends on the safety of lithium battery testing and certification
1, UL Certified
  Today, most countries and regions in the world, involving safety, health, environmental protection projects such as product demand must be obtained before entering the market, secure authentication. UL mark has become world famous as one of the safety certification mark.
Testing standards are as follows:
1, shell
  lithium battery shell should have sufficient strength and rigidity sufficient to resist the excessive increase of pressure, without causing a fire. User-replaceable lithium battery should have sufficient strength, they would not hurt to people.
2, electrolyte
  user-replaceable 92P1087 battery should not contain pressure of vapor or spray injury to the eyes of toxic vapor and liquid, or the battery shell in the normal laboratory conditions (temperature 23 ℃), by the shock of the spilled liquid should be less than 5ml.
3, using
  lithium batteries should be used to take measures to avoid the abnormal charge current, the test has an acceptable battery charge current Ic, not under normal conditions, it should be in the end product use protective measures.
4, leakage
  leakage or leakage of mass loss of standards, the quality of batteries or battery maximum loss does not exceed 1g0.5%, 1 ~ 5g0.2%> 5g0.1%.
5, mechanical testing
  (1) Extrusion: 32mm diameter by a hydraulic piston to the flat surface of the battery 2 to exert pressure 13KN (the pressure 17.2Mpa), when the maximum pressure 08K8194 reached after the pressure relief. Sample did not fire, not explode.
(2) Impact: The diameter of 15.8mm center of the rod on the sample, so that the weight of 9.1Kg of weight from a height of 610mm onto the sample. Sample did not fire, not explode.
(3) Acceleration: battery on the fixture, respectively, along the three mutually perpendicular to the direction of acceleration (acceleration requirements: the initial 3ms smallest average acceleration should reach 75g, peak acceleration of between 125-175g). Test temperature 20 ± 5 ℃. Samples should be no fire, no explosion, no leakage other samples.
  (4) Vibration: battery to withstand a simple tuning vibration (along the three mutually perpendicular directions), vibration frequency 10-55Hz rate 1Hz/min within the scope of changes in the 90-100min resume back, amplitude of 0.8 mm. Samples should be no fire, no explosion, no leak.
  (5) Thermal Shock: samples in a natural convection or forced convection oven heating, oven temperature to 5 ± 2 ℃ / min rate of heating to 150 ℃, and 08K8196 maintain the cease after 10min. Samples should be no fire, not explode.
  (6) thermal cycling test: the battery put the test room, and bear the following cycles:
  ① 30min in temperature to 70 ± 3 ℃, thermal insulation 4h.
  ② 30min down to within 20 ± 3 ℃, thermal insulation 2h.
  ③ 30min in temperature to 40 ± 3 ℃, thermal insulation 4h.
  ④ 30min down to within 20 ± 3 ℃.
  ⑤ Repeat the above cycle of nine times.
  ⑥ 10 cycles, the battery placement to 7 days for inspection. Samples should be no fire, no explosion, no leakage.
  (7) high-altitude simulation: the sample cell in absolute pressure 11.6Kpa (1.68psi), 20 ± 3 ℃ (68 ± 5 ° F) under the conditions of storage of 6 hours. The sample cell is not an explosion or fire, can not have perforation or leakage.
  6, charge-discharge test
  (1) charge-discharge cycles: test temperature 25 ℃, batteries according to the manufacturer's requirements of charge-discharge cycles, cycle to the capacity of the initial nominal capacity of 25% or 90 days after the termination of a continuous loop. Samples should not be any security incidents.
  (2) short-circuit test: The resistance of copper is less than 0.1Ω for the 92P1102 battery anode and cathode shorted, the battery discharge until the fire or explosion, or until the battery fully discharged, the shell temperature down to room temperature again to stop (test in the at room temperature 60 ± 2 ℃ circumstances). Samples should be no fire, no explosion, the shell casing or the battery temperature does not exceed 150 ℃.
  (3) non-normal charge test: normal discharge is completed, with three times the normal charge current of the current charge. No fire, no explosion.
  (4) a forced discharge test: fully discharged batteries at room temperature, and a number of new batteries of the same model series, the groups on the formation of short-circuit the battery test. Samples should be no fire, not explode.
  (5) Overcharge: Battery at full power conditions, with 3C, 10V constant current, constant voltage charging the battery, when the current reaches 100mA, the conversion constant voltage charging for 48 hours.
  7, ID
  battery shall identify the manufacturer's name, trade name or trademark, style setting. Batteries shall identify the Warning, and a corresponding description.

  2, Extra Energy Standards
  Extra Energy certification is a non-profit organization based in Germany, Tanzania to take, the main work is focused on the global neutrality of light electric 92P1077 vehicles of information, and provide value-added services, which related to the safety of lithium batteries are very strict testing , rigorous, to be recognized for most European customers.
Testing standards as indicated below.
Test methods test the safety standards before the state test method
An abnormal charging at room temperature, and air power, factory assembled. Remove protection circuit and managing circuit, full power in the battery case, battery with 10A current overcharge to 1.5 times the nominal voltage. No fire, no explosions; testing process battery shell temperature is less than 120 ℃; experimental wooden table is not burning coke; the release of toxic gases.
2 short-circuit
 at room temperature, original charger charge to full power, factory assembled. Remove protection circuit and managing circuit, full power in the battery case, 92P1073 battery positive and negative direct short-circuit. No fire, no explosions; testing process battery shell temperature is less than 120 ℃; experimental wooden table is not burning coke; the release of toxic gases.
3 weight extrusion at room temperature, original charger charge to full power, factory assembled. 15 cm diameter steel rolls, 10 tons of pressure on the battery pack to squeeze. No fire, no explosions; battery overflow of gas, solid and liquid non-toxic.

  3, CE certification
  In recent years, the European Economic Area (the European Union, the European Free Trade Association member countries, except Switzerland) into marketable commodities, CE certification mark used more and more CE certification mark affixed to goods that are consistent with safety, health, environmental protection and consumer protection by a series of European directives to 08K8199 express requirements.