现在，人们购买新能源汽车客观上要在磷酸铁锂电池和三元锂电池两种技术之间进行二选一的选择，业内人士告诉我们：重视续航能力和车辆轻型化的选三元系，重视安全性的选磷酸铁锂系。对此，消费者迫切希望业内人士能从技术角度切实地给出答案：磷酸铁锂电池安全吗？这一问题要从材料/结构稳定性、生产工艺、充放电特性三个方面来回答。

1. 磷酸铁锂是目前最安全的锂离子电池正极材料，不含任何对人体有害的重金属元素，其橄榄石结构中氧气很难析出，提高了材料的稳定性。

2. 磷酸铁锂电池生产流程与其他锂电池品种大体相同，其核心工序有：配料、涂布、辊压、制片、卷绕。在配料环节，磷酸铁锂材料导电性能相对较差，所以，颗粒一般做得更小一些，这样做的客观效果是：内部排列更为均匀，促使其形成了平衡的电压平台，工作时能够保持电池的状态稳定。

3. 充放电是锂电池两种基本的工作状态。当磷酸铁锂电池充放电时，由于铁离子氧化能力不强，不会放出氧气，自然也就难以与电解质发生氧化还原反应，这使得磷酸铁锂电池充放电过程处在一个安全的环境中。不但如此，磷酸铁锂电池在大倍率放电，甚至过充放电过程中，也难以发生剧烈的氧化还原反应。同时，锂在脱嵌后，晶格变化使晶胞（晶体的最小构成单位）最终体积会缩小，这正好抵销了碳负极在反应中增加的体积，所以，在充放电中磷酸铁锂电池能够保持物理结构的稳定，消除了体积增大而产生电池爆裂现象的隐患。

上面说到的电池安全性是为了方便起见而采用单体为例予以说明，在投放使用时，磷酸铁锂电池需要提供适用于用电器具的额定电压与容量，这时就需要进行磷酸铁锂电池配组工作，即，把单体磷酸铁锂电池通过串联/并联/串并联方式装备成可供实用的锂电池组。这种配组工作最需要注意的是各个单体电池的一致性。通常，它还带有均衡管理系统，通过关键参数控制保证锂电池使用的安全性，这一点则是各类锂电池组的共同特点。

Now, when purchasing new energy vehicles, people objectively have to choose between lithium iron phosphate battery and ternary lithium battery. Industry insiders tell us that the ternary system and lithium iron phosphate system should pay attention to the endurance and vehicle light-weight, and the safety. In this regard, consumers urgently hope that industry insiders can give a practical answer from a technical point of view: Is lithium iron phosphate battery safe? This question should be answered from three aspects: material/structure stability, production process and charge discharge characteristics.

1. Lithium iron phosphate is the safest cathode material for lithium-ion batteries at present. It does not contain any heavy metal elements harmful to human health. It is difficult to separate oxygen from its olivine structure, which improves the stability of the material.

2. The production process of lithium iron phosphate battery is basically the same as that of other lithium battery varieties, and its core processes include: batching, coating, rolling, production and winding. In the batching link, the conductivity of lithium iron phosphate material is relatively poor, so the particles are generally made smaller. The objective effect of this is that the internal arrangement is more uniform, which promotes the formation of a balanced voltage platform, and can keep the battery stable during operation.

3. Charging and discharging are two basic working states of lithium battery. When the lithium iron phosphate battery is charged and discharged, it is difficult to react with the electrolyte due to the weak oxidation capacity of iron ions, which will not release oxygen. This makes the charging and discharging process of the lithium iron phosphate battery in a safe environment. Moreover, it is difficult for lithium iron phosphate battery to undergo severe redox reaction in the process of large rate discharge, even overcharge discharge. At the same time, after lithium is deinked, the lattice change will make the final volume of the crystal cell (the smallest constituent unit of the crystal) shrink, which just offsets the increased volume of the carbon negative electrode in the reaction. Therefore, the lithium iron phosphate battery can maintain the stability of the physical structure during charging and discharging, eliminating the hidden danger of battery bursting caused by the increase of the volume.

The battery safety mentioned above is explained by taking the monomer as an example for convenience. When the lithium iron phosphate battery is put into use, it needs to provide the rated voltage and capacity applicable to electrical appliances. At this time, it is necessary to carry out the lithium iron phosphate battery matching work, that is, the lithium iron phosphate battery is equipped into a practical lithium battery pack through the series/parallel/series parallel mode. The most important thing to pay attention to in this assembly work is the consistency of each single battery. In general, it also has a balanced management system to ensure the safety of lithium battery use through key parameter control, which is a common feature of all types of lithium battery packs