聚合物锂电池蓝牙耳机电池的安全性能有没有保障？
来源：宝鄂实业
2019-05-12 14:15
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蓝牙耳机可分为三大种类：
1、单声道
单声道蓝牙耳机就是单耳耳机，它多为无线小巧样式，可直接塞进耳朵里，其主要的功能就是接听和挂断通话之用，可进行控制音量调节，单耳式蓝牙耳机部分机型还拥有双待、双麦、丽音等技术。
2、立体声
立体声耳机是基于智能手机支持A2DP蓝牙立体声协议之上的，只有我们的手机设置有支持A2DP蓝牙立体声协议，方可连接立体声蓝牙耳机欣赏蓝牙耳机音乐。立体声蓝牙耳机拥有颈挂、耳麦、夹子、眼镜等样式，歌词等功能。
3、真无线
真无线蓝牙耳机与传统蓝牙耳机有很大的区别，真无线蓝牙耳机在于采用了Multiplexlink多点无线互联技术。实现了左右耳之间的无线连接，外部完全摒弃了线材连接的方式，且左右耳塞都能单独工作。
接下来我们言归正转，讲一讲聚合物锂电池蓝牙耳机电池的安全性能有没有保障？？
首先蓝牙最新版本2.1的功能，透过设定在2个装置之间互相确认讯号的发送间隔来达到节省功耗的目的。一般来说，当2个进行连结的蓝牙装置进入待机状态之后，蓝牙装置之间仍需要透过相互的呼叫来确定彼此是否仍在联机状态，当然，也因为这样，蓝牙芯片就必蓝牙耳机须随时保持在工作状态，即使手机的其它组件都已经进入休眠模式。为了改善了这样的状况，蓝牙2.1将装置之间相互确认的讯号发送时间间隔从旧版的0.1秒延长到0.5秒左右，如此可以让蓝牙芯片的工作负载大幅降低，也可让蓝牙可以有更多的时间可以彻底休眠。根据官方的报告，采用此技术之后，蓝牙装置在开启蓝牙联机之后的待机时间可以有效延长5倍以上。这样蓝牙耳机聚合物锂电池就处在低功耗的状态下，不会有什么安全方面的考虑。
目前市场上蓝牙耳机电池用的都是聚合物锂电池，我们鸿伟能源有限公司也生产蓝牙产品上用的这种聚合物无锂电池 ( 常见的型号有501235-150mAh,401120-60mAh，601113-30mAh,301223-75mAh，401323-90mAh )。与液态锂离子电池相比，这种聚合物锂离子电池不但安全性高，同时还具有可薄形化、任意面积化与任意形状化等优点，外壳也使用了更轻的铝塑复合薄膜。不过，其低温放电性能可能还有提升的空间。但是目前任然担任蓝牙耳机锂电池主角，它的体积小，重量轻，容量密度大等优势是其他电池不可替代的。
现在我们国内的聚合物锂电池多数仅仅是软包装的电池，外壳用的是铝塑膜，其中电解液的话还是没有改变。聚合物锂电池同样可以薄型化，其低温放电特性比聚合物电池更好，而材料能量密度则与液态锂电池、普通聚合物电池基本一致，但因为使用了铝塑膜，因此比普通液态锂电更轻。安全方面，当液体刚沸腾时软包电池的铝塑膜会自然鼓包或破裂，同样不会爆炸。但是一定要注意的是，新型电池依然可能燃烧或膨胀裂开，锂电池的安全方面不是绝对的，任何事物都没有绝对安全。比如生命之水是生命的起源，可以救人，同样在某些特定的情况也存在安全问题。以前对钛酸锂电池的发展不太看好，但是那是已经过去式了，如今的钛酸锂电池发展如何？能否在动力锂电池市场担当大任？经统计目前钛酸锂电池的能量密度约为 92 wh/kg，磷酸铁锂为 108 – 120 wh/kg之间，而磷酸铁锂电池能量密度虽然是较高，但与钛酸锂电池的能量密度差距很小差距不是很大。比如东莞的鸿伟能源公司正研发一款正极是镍锰材料、负极搭配钛酸锂的锂电池，要是研发实验成功后，钛酸锂电池能量密度可达 120 wh/kg或者更高，期待试验成功的喜讯。
钛酸锂电池与磷酸铁锂电池的能量密度差距正在不断缩小，而且还有望突破比磷酸铁锂电池还要高一点，另外钛酸锂电池研发技术进入补贴政策目录这一利好因素刺激，锂电池行业乐观预计， 未来的几年钛酸锂电池将可快速发展，并与三元锂电池和磷酸铁锂电池一起在动力锂电池市场形成三足鼎立。那么下面我就对电动公交车钛酸锂电池优缺点分析
About: is there any guarantee for the safety performance of polymer lithium battery Bluetooth headset battery? It is not fun to explode on ears.
Bluetooth headphones can be divided into three categories:
1. Mono
The single channel Bluetooth headset is a single ear headset. It is mostly wireless and small style. It can be inserted directly into the ear. Its main function is to listen and hang the phone. It can control the volume, and the single ear type Bluetooth headset also has double, double, and rye techniques.
2. Stereophonic
Stereo headphones are based on smart phone support for A2DP Bluetooth stereophonic protocol. Only our mobile phone settings support A2DP Bluetooth stereophonic protocol, and you can connect stereo Bluetooth headphones to enjoy Bluetooth headset music. Stereo Bluetooth headset has neck hanging, headset, clip, glasses and other styles, lyrics and other functions.
3. Real wireless
The real wireless Bluetooth headset is very different from the traditional Bluetooth headset. The real wireless Bluetooth headset is based on the Multiplexlink multi-point wireless interconnect technology. The wireless connection between the left and right ears is realized, and the way of wire connection is completely abandoned, and the left and right earplugs can work independently.
Next, we are going to talk about the safety of the Bluetooth headset battery.
First of all, the function of the latest version 2.1 of Bluetooth is achieved by saving the power consumption by setting the interval between the 2 devices to confirm the sending interval of signals. In general, when 2 connected Bluetooth devices are in standby state, the Bluetooth devices still need to make sure that they are still in the online state through each other. Of course, because of this, the Bluetooth chip must keep the Bluetooth headset at any time, even if all the other components of the cell phone have entered. Dormant mode. In order to improve this situation, Bluetooth 2.1 prolongs the interval between the signal transmission time between the old version of the device from 0. to 0.5 seconds from the old version, so that the workload of the Bluetooth chip can be greatly reduced, and the Bluetooth can have more time to sleep completely. According to the official report, after this technology is used, the standby time of Bluetooth device can be effectively extended by more than 5 times after the Bluetooth connection is opened. Such a Bluetooth headset polymer lithium battery is in a state of low power consumption, and there will be no safety considerations.
At present, the market for Bluetooth headset batteries is made of polymer lithium batteries. Our Hongwei Energy Co., Ltd. also produces the polymer lithium batteries used in Bluetooth products (common models include 501235-150mAh, 401120-60mAh, 601113-30mAh, 301223-75mAh, 401323-90mAh). Compared with the liquid lithium ion battery, this kind of lithium ion battery is not only safe, but also has the advantages of thinning, arbitrary area and arbitrary shape, and the shell also uses a lighter aluminum plastic composite film. However, there may be room for improvement in its low temperature discharge performance. But at the moment, it is still the main body of the lithium headset of Bluetooth headset. Its advantages are small size, light weight, large capacity and so on.
Now our domestic polymer lithium battery is mostly only a flexible packaging battery, the shell is made of aluminum plastic film, and the electrolyte has not changed. The polymer lithium battery can also be thinned, and its low temperature discharge characteristics are better than that of the polymer battery, while the material energy density is basically the same as that of the liquid lithium battery and the ordinary polymer battery, but because of the aluminum plastic film, it is lighter than the ordinary liquid lithium. In safety, when the liquid is just boiling, the aluminum plastic film of the soft battery will naturally burst or burst, and it will not explode. But it is important to note that the new type of battery can still burn or expand, and the safety of the lithium battery is not absolute, and nothing is absolutely safe. For example, the water of life is the origin of life, it can save people, and there are also security problems in certain situations.
