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Industry Dynamic

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What is Jump Starter?

Date:2016-03-20 Hits:1002
During bad weather or when the vehicle battery is short in power, it is highly possible that you can’t start the engine and finally get stuck in the outdoor. Jump starter is developed to solve this kind of problem. Currently, there are two kinds of jump starters: lead-acid battery type and lithium-polymer battery type.

Lead-acid jump starter is the traditional one which has been in the market for many years. With their big volume and heavy weight, they usually have higher capacity and start current. Most of these traditional jump starters can also work as inflator and offer protection against over-current, overload, over-charge and reverse connection. Some of them can also be used to charge electronic devices and have the invertor function. However, due to its size and weight, buyers of lead-acid jump starters are basically limited to rescue teams and repair shops, which will use them to offer rescue services to clients when needed.

Lithium-polymer jump starters were launched several years ago and due to its small size and light weight, they are getting more and more popular all over the world. Most of these jump starters don’t have the inflator function but can also offer protection against over-current, over-charge and over-discharge. Like power banks, they can be used to charge various electronic devices including mobile phone, tablet and laptop. Besides, its torch function can serve as lighting or SOS signal. When used together with smart jumper cable, this kind of li-polymer jump starters can even provide protection against reverse connection, short circuit, low voltage and reverse charging.
 
Made of high-rate batteries, lithium polymer jump starters can be divided into two categories: lithium iron phosphate (LiFePO4) and lithium cobalt oxide (LiCoO2). Lithium iron phosphate batteries use LiFePO4 as anode material. For lithium polymer batteries, there are various anode materials including lithium cobalt, lithium manganite, lithium nickelate, ternary material (Li[Ni,Co,Mn]O2) and lithium iron phosphate. Among these materials, lithium cobalt is the most popular one and thus most li-polymer jump starters are made of LiCoO2 battery cells. Compared with LiCoO2, LiFePO4 battery is more stable and has better safety performance. However, it also has disadvantages including lower energy density and poorer performance at cold conditions. Besides, the key reason that limits LiFePO4 in the jump starter market is that its voltage is only 3.2V for one single battery cell while LiCoO2 battery cell can reach 3.7V-3.9V. As a result, it requires four LiFePO4 battery cells to reach 12V for jump starting purpose while LiCoO2 type only requires three, which leads to LiCoO2’s substantial cost advantage.

Reference Links:

http://baike.baidu.com/link?url=MoYQUjcSmMX8voDSeSDkmb05G-cKQO7WxPsx4Qn2kpomS4FyTVGrLAWueflqN4JMsDrDrmFLbFPuRXBvNx65mq
http://en.wikipedia.org/wiki/Jump_start_(vehicle)
http://baike.baidu.com/view/1362735.htm