松下蓄电池达不到使用寿命的原因
尽管今天松下蓄电池在结构设计与使用原材料方面比过去有了很大的改进，性能有了相当大的提高，许多设计和用料精良的
免维护铅酸松下蓄电池浮充使用的理论寿命为15~20年以上，但真正能在使用中达到如此寿命的电池恐怕是少之又少。究其原因,
我们认为有以下几点：
1)
影响松下蓄电池使用寿命的原因不外乎两个方面：
1)铅酸蓄电池在环境温度变化时对其充电设备有苛刻要求。由于过去的充电设备在设计上的缺陷，因此影响了蓄电池的正常使用
寿命。
2)铅酸蓄电池放电后，由于过去充电设备的使用不方便，致使用户不能及时给电池补充电，其造成的伤害是使电池的寿命大为缩
短。
研究发现：电池充电过程对电池寿命影响最大，放电过程的影响较少。也就是说，绝大多数的蓄电池不是用坏的，而是“充坏”
的。因此在使用的过程中一定要注意。显然，日常使用中的铅酸蓄电池不可能长期处在的环境中，一日中尚有早、中、晚的温差
变化，更何况一年中还有春、夏、秋、冬四季更大的温差，因此目前市面上普遍使用的各种晶闸管整流型、变压器降压整流型、
以及一般的开关稳压电源型的铅酸蓄电池充电器。以恒压或恒流方式对电池进行的充电，是无法达到铅酸蓄电池补充充电所需要
满足的严格技术要求的。纵观过去所采用的这些对铅酸蓄电池充电的方法，以及根据这些方法开发的铅酸蓄电池充电器。我们不
难看出，其技术是不够完善的用这些产品给松下电池充电，势必直接影响铅酸蓄电池的使用寿命。同时这些充电器还存在着工作
电压适应范围窄、体积大、效率低、安全系数差等问题。充电设备的设计不够完善，使用也不方便。
2)松下蓄电池放电后得不到及时的补充充电，特别是过放电对电池造成致命之伤。
3)少数厂家的产品质量低劣，以次充好。
以上原因，我们认为第二、三点从技术上讲是比较容易预防和做好的，唯第一点牵涉比较难以解决的技术问题，下面重点谈谈这
方面存在的问题。
2对蓄电池充电的技术要求
厂家提供的松下蓄电池保证使用寿命的技术指标是在环境温度为25℃下给出的。当环境温度一定，充电电压比要求的电压高
100mv，充电电流将增大数倍。因此，将导致电池的热失控和过充损坏。当充电电压比要求电压低100mv时，又将使电池充电不足
，也会导致电池损坏。另外松下蓄电池的容量也和温度有关，大约是温度每降低所以厂家要求松下蓄电池的使用者在夏天电池放
出额定容量的50%后，冬天放出25%后就应及时充电。
Reasons for Matsushita Battery Not Reaching Service Life
Although Panasonic batteries have been greatly improved in structure design and use of raw materials, their performance has been greatly improved, and many of them are well designed and used.
The theoretical life of maintenance-free Panasonic lead-acid batteries for floating charge is more than 15-20 years, but few batteries can really achieve such life in use. The reasons are as follows:
We believe that there are the following points:
1)
There are two reasons that affect the service life of Panasonic batteries:
1) Lead-acid batteries have stringent requirements for charging equipment when ambient temperature changes. Due to the design defects of charging equipment in the past, the normal use of batteries is affected.
Life.
2) After discharge of lead-acid batteries, due to inconvenient use of charging equipment in the past, users can not replenish the batteries in time. The damage is that the life of batteries is greatly reduced.
Short.
It is found that the battery charging process has the greatest impact on the battery life, while the discharge process has less impact. That is to say, the vast majority of batteries are not damaged, but "charged and damaged".
. Therefore, we must pay attention to the use of the process. Obviously, lead-acid batteries in daily use can not be in the environment for a long time, and there is still a temperature difference between early, middle and late in the day.
Moreover, there is a greater temperature difference in spring, summer, autumn and winter in a year. Therefore, various kinds of thyristor rectifiers, transformer step-down rectifiers are widely used in the market at present.
And general switching regulated power supply type lead-acid battery charger. Charging batteries in a constant voltage or current manner is not enough to meet the requirements of supplementary charging of lead-acid batteries.
It meets the strict technical requirements. Throughout the past, these methods of charging lead-acid batteries and the lead-acid battery chargers developed according to these methods are reviewed. We do not
It is difficult to see that the technology is not perfect enough to charge Panasonic batteries with these products, which will directly affect the life of lead-acid batteries. At the same time, these chargers are still working.
The problems of narrow voltage range, large volume, low efficiency and poor safety factor are discussed. The design of charging equipment is not perfect and its use is inconvenient.
2) Panasonic batteries can not be recharged in time after discharge, especially when overdischarge causes fatal damage to batteries.
3) The products of a few manufacturers are inferior in quality and inferior in quality.
For the above reasons, we believe that the second and third points are technically relatively easy to prevent and do well, but the first point involves technical problems that are relatively difficult to solve. Here we will focus on these points.
The existing problems.
2. Technical Requirements for Battery Charging
The technical specifications for ensuring the service life of Panasonic batteries provided by the manufacturer are given at ambient temperature of 25 C. When the ambient temperature is constant, the charging voltage is higher than the required voltage.
100 mv, charging current will increase several times. Therefore, it will lead to thermal runaway and overcharge damage of batteries. When the charging voltage is 100 mV lower than the required voltage, the battery will be undercharged.
It can also lead to battery damage. In addition, the capacity of Panasonic batteries is also related to temperature, which is about every time the temperature drops, so manufacturers require Panasonic batteries users to release batteries in summer.
After 50% of the rated capacity is released, 25% of the capacity should be charged in time in winter
