Solar Energy+HPC1520+ER14250——Perfect Dual Power Supply Solutions for the OBU of ETC System
With the rapid development of highway construction and the increase of automobile ownership in China, the traditional collection system is difficult to meet the development needs. Thus the intelligent transportation electronic toll collection system (ETC) is one of the effective means to solve the problem, and the on-board equipment OBU is an important part of ETC system. This paper gives a brief description the working characteristics of OBU and power consumption mode in the process of transaction, and develops a dual power supply solution of ER14250 (1400mAh) +HPC1520+ photovoltaic panels with high reliability and long lifespan as well as high power output based on the practical application characteristics of OBU and the advantages and disadvantages of power demand. Through the test of the market, the solution can meet the work demand of OBU well, which is better than other options.
I. Overview of ETC
The electronic toll collection system is the most advanced road and bridge toll collection system in the world. Through the microwave special short-range communication between the OBU electronic tag installed on the vehicle windshield and the microwave antenna in the toll station ETC lane, it uses the computer networking technology and bank settlement process in the background, so as to achieve the vehicle through the road and bridge toll station without parking and can achieve the purpose of road and bridge fees. High sensitivity OBU system modules can be divided into three working states: dormant, pre-trade and on-trade. The change in communication state is a reflection of the OBU transaction status as it passes through the ETC system. And the largest power consumption in the whole trading process is the card reading process in the trading state, and the instantaneous current can reach more than 150mA.
II. Analysis of power consumption and lifespan of OBU in practical application environment
According to the characteristics of OBU power supply in ETC, it needs to meet not only the discharge requirements of extreme outdoor weather such as winter (-40℃) in Northeast China, summer (+85℃) in Southwest China and high humidity (85%RH) in Southeast coastal areas, but also the requirements of long lifespan, high reliability, safety and environmental protection at the same time. In addition, it also requires instantaneous large current pulse for power supply. On average, the vast majority of OBU in the current Chinese market are traded less than 10 times or even less than 1 time per day. Calculated from the power consumption data measured in the laboratory, as long as the power supply has a capacity of more than 1000mAh, it can theoretically achieve a total of 20 thousand transactions and a working life of more than 5 years.
III. Comparison of OBU power solutions
3.1 Rechargeable batteries + photovoltaic batteries
They have features of low material cost, high discharge current, high self-discharge rate, narrow range of applicable temperature, low capacity retention, complex power management circuits, solar batteries + voltage conversion chip, high conversion efficiency, good voltage stabilization performance, high price of voltage conversion chip, interference with OBU electrical lines.
3.2 ER14250+HPC1520+photovoltaic batteries
They have features of high reliability, wide operating temperature range, low self-discharge rate, limited output capacity of large current pulse. In order to solve the problem of OBU power supply safety and reliability and environmental adaptability of intelligent transportation ETC system, LONGSING has designed and developed a composite power supply which combines the lithium-thionyl chloride batteries ER14250 (capacity 1400mAh) of high energy density as the backup power supply and the battery capacitor HPC1520 with high power characteristics according to the outdoor temperature collector dual power supply solution which has been applied for five years. The composite power supply has the features of long lifespan, high power output, safety and reliability, wide temperature operation, etc., especially suitable for outdoor low and high temperature environment, and it also has the features of high pulse power output of HPC battery capacitor and high reliability and long lifespan of ER lithium-thionyl chloride battery. Generally speaking, HPC1520 is charged by photovoltaic battery. When large current pulse output is needed, power is supplied directly from the HPC battery capacitor; while when the photovoltaic does not work, the lithium-thionyl chloride battery charges the HPC with a small current, so that the capacity of the lithium-thionyl chloride battery can be fully released under a small current, and the maximum utilization of the battery capacity can be obtained. And this working principle is also in line with the requirements of OBU power intermittent operation.
Ⅳ. Tracking evaluation of long-term reliability
4.1 Test of performance reliability
Whether the composite power supply can provide stable output capacity during the entire lifespan cycle of the OBU is an issue that needs to be paid attention to in practical applications. The HPC1520, which has been used in on-board unit OBU of ETC system on the market for five years, was collected to conduct discharge performance test with new battery: -10℃ 800mA, 10 ms/1min, compare to the performance changes of HPC1520 as follows: Through testing and comparison, it is found that HPC1520 has been working for five years at low temperature -10℃, and the load voltage of 800mA pulse discharge is slightly lower than the new load voltage of 0.1V, but it still has the ability to provide pulse discharge of large current in practical application.
4.2 Test of long-term reliability
The on-board unit OBU installed in the windshield of the vehicle is in an outdoor enclosed environment for a long time. In order to better evaluate the reliability of the performance of the composite power supply under such use conditions, it is necessary to put the battery pack in the glass sun room to conduct insolation experiment to simulate the actual working conditions, and to keep track of changes in the performance of battery pack under these storage conditions. Through long-term tracking in the insolation experiment, both the open circuit voltage and load voltage of the composite power supply remain stable. Besides, there is no failed battery, which can maintain a high reliability according to the current actual storage data of 450 days. The Arrhenius formula shows that the reaction rate constant is exponentially related to temperature, which means the rate of chemical reaction increases by 2 to 4 times for every 10 degree increase in temperature, and 200 days stored at 60℃ is equivalent to 10 years stored at room temperature. Through the long-term tracking of the storage experiment at 60℃, both the open circuit voltage and load voltage of the composite power supply remain stable. And from the current data of 300 days (equivalent to 15 years of room temperature storage), there is no failure of the battery, which can provide a very stable current output capability.
Ⅴ. Summary of application
ER14250+HPC1520+photovoltaic batteries, the dual power supply composite power supply solution has the features of full sealing, wide temperature range, low self-discharge rate, long lifespan, high reliability, light weight, safe design, etc, which has been successfully applied in various products of intelligent transportation system. Through the long-term test of the market, its stability has been widely recognized, and it is preferred by comparing performance with others.
- |
- +1 赞 0
- 收藏
- 评论 0
本文由微笑向前转载自LONGSING,原文标题为:Solar Energy+HPC1520+ER14250——Perfect Dual Power Supply Solutions for the OBU of ETC System,本站所有转载文章系出于传递更多信息之目的,且明确注明来源,不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。
相关推荐
【应用】朗升提出太阳能+HPC1520+ER14250的ETC系统OBU双电源方案
朗升提出的ER14250+HPC1520+光伏电池,双电源复合电源解决方案具有全密封性、宽温度使用范围、低自放电率、长寿命、高可靠性、重量轻、安全设计等优点,已成功应用于智能交通系统的各类产品中。经过市场的长期检验,其稳定性能已被广泛认可。
应用方案 发布时间 : 2019-07-21
【应用】朗升(LONGSING)国产物联网电池组ER26500+HPC1520可为智能水表电表气表长效供能
对于智能水表,在无电源或者断电的情况下,需要有电池进行供能,定时给无线模块上传数据,由水电气管理企业统一收集管理数据。朗升(LONGSING)采用的IOT电池ER26500+HPC1520,就可以满足五年以上使用寿命. 极大的方便了智能表数据的统计,节约了很多人力物力。
应用方案 发布时间 : 2019-03-22
【应用】朗升物联网电池组HPC1520+ER18505应用于头戴式耳机上,最大能提供5A电流
在客户某个头戴通话耳机中,需要一个国产大于3000mAh容量、3.6V电压、持续放点电流大于1A的供电电池。按照客户需求给客户推荐了朗升物联网电池组HPC1520+ER18505。
应用方案 发布时间 : 2022-03-24
朗升电池助力智慧城市应用
朗升系列电池产品为智慧城市的智慧井盖,智慧废弃物管理,智慧消防栓,智慧停车等等应用提供满足高容量、高脉冲电流需求电池解决方案。
产品 发布时间 : 2024-10-24
水表和燃气表为什么使用锂亚电池?朗升柱式锂亚电池放电电压高且稳定,年自放率低于2%
随着物联网的普及,现在的计量表都实现了远程数据传输,控费功能。这类仪表需要长时间的待机,而且平时功耗非常小,只有上传数据或者接收控制指令的时候,功率才比较大。对于这种用电场景,推荐使用朗升一次性的锂亚电池,它电压够高,3.6V;适用范围广,能在-60℃~+85℃区间使用;特别是它自放电率非常小,年自放率低于2%,并且它的能量密度高,更换一次电池能用几年的时间。
应用方案 发布时间 : 2024-05-10
Power Glory (Lijia) Lithium-ion Capacitor Batteries LSC Series Strongly Empowers for Smart City - ETC Application
ETC (Electronic Toll Collection), translated into Chinese as electronic toll collection, is an automatic toll collection system on highways or bridges, and is pre-installed with super lithium-ion capacitor batteries (LSC series).
应用方案 发布时间 : 2024-07-03
【选型】朗升(LONGSING)复合脉冲电容(HPC)电池/ 物联网电池(HPC+锂亚)选型指南(中文)
目录- 产品应用概述 复合脉冲电容(HPC)与物联网电池(IOT)
型号- IOT-ER34615,HPC-1020,ER14505,ER34615,IOT-ER14250,ER26500,HPC1550,HPC1020,IOT-ER18505,HPC1520,IOT-ER14335,HPC-1520,IOT-ER26500,ER14250,IOT-ER14505,HPC-1550,HPC-1530
【产品】物联网IOT电池组HPC1520+ER34615,恒压放电、10年超长寿命
朗升(LONGSING)采用的联网IOT电池组不但能独立使用,寿命长,且经过长期的存储后仍然能获得接近新电池的性能。最重要的是能满足在极低或极高的温度下正常工作。相比于单独使用锂亚硫酰氯电池可靠性呈几何极的增长。物联网IOT电池组 HPC1520+ER34615拥有超长的生命周期(5000次100%DOD 循环),自放电率低(小于2%/每年),储存十年后容量保持率 96%。
新产品 发布时间 : 2019-05-09
分享电池的基础知识——原电池的命名方法
本文朗升将为大家介绍电池的基础知识——原电池的命名方法。现在国际上有ANSI和IEC两种标准。ANSI就是美国国家标准化组织(American National Standardisation Institute),而IEC是国际电工委员会(International Electrotechnical Commission)。
技术探讨 发布时间 : 2023-12-27
【经验】塔迪兰( TADIRAN )HLC1520电池与国产朗升HPC1520参数对比,价格低50%以上
在物联网领域广泛使用电池,朗升推出了HPC1520,最大充电电压 : 4.1 V;最大容量(mAh) : 90mAh;放电终止电压 : 2.5 V;工作温度 : -40℃~+85℃, Ø15 × 20;可媲美塔迪兰( TADIRAN )的HLC1520。
设计经验 发布时间 : 2019-04-10
朗升物联网电池(IOT)选型表
朗升提供了以下技术参数的物联网电池选型,最大脉冲电流5A,电压3.65V,最大容量19000mAh,储存10年后容量保持率最高可达96%,工作温度-40℃~+85℃的物联网电池(IOT)。
产品型号
|
品类
|
标称电压 (V)
|
额定容量 (mAh)
|
电容电压(V)
|
最大脉冲电流(A)
|
电压延迟
|
HPC1520+ER14250
|
物联网电池组
|
3.65V
|
1200mAh
|
3V
|
1A
|
None
|
选型表 - 朗升 立即选型
电子商城
登录 | 立即注册
提交评论