Brief introduction

VRLA Battery (NM-450) for internal-combustion locomotive is researched and developed by Shuangdeng Group together with Locomotive. Research Institute of Development Academy of Ministry of Railway. The post seal of the product adopts the patent technology and has quite high assembly and open valve pressure which can reduce water loss to a great extent. Compared with traditional VRLA Battery, NM-450 has a lot of advantage, such as good start-up ability under low temperature, high specific energy, safer and longer cycle life. It can be the most ideal power source as internal-combustion locomotive start-up, illumination and other standby power source system.

The product is executed in accordance with the industry standards issued by Ministry of Railway of P.R. China TB/T3061-2008 "Valve-regu-lated Lead-acid Accumulator for Railway Locomotive".

Structure Characteristics

Perfect seal of post: unique structure of triple seal (patent: ZL 02 2 20024.X) to prevent the acid leakage.

Retardant- lame and blast-guard safety valve: the open and close pressure of the valve is stale and reliable.

Grid which is designed by the latest modern technology to enhance the utilization of active material and the uniformity of the current distribution is made of special multi-element alloy to ensure the longer lifetime of the battery.

Die-casting copper core of bigger diameter, with large cross-sectional area is large, and high strength, enhance to the large discharge acceptability.

Effective structure for quakeproofing and heat dissipation.

Handle is mounted on all cells for easy handing.

Performance Characteristics

Designed service life of the battery for locomotive operation is more than 6 years or 900000 km.

Cycle life: start-up times is more than 10000 times and C 5 is more than 85% (DOD≤55%).

Start up at normal temperature：start-up current is 1700-1800 A and start-up time is more than 300s under 25℃±5℃.

Start up at low temperature：start-up current is 1500 A and start-up time is more than 50s under-35℃±2℃.

Self-discharge performance is less than 4%/month

Charge acceptability：charge current is more than 80 A.

Seal reaction efficiency is more than 98%.

Environmental Operation

Altitude is not more than 2500m.（For service at the altitude over 2500 m, an clear indication shall be given in the contract）

Environmental temperature is between -40℃ and +40℃.

Relative humidity is not more than 95%.

Service in windy, blowing dust, rainy and snowy weather is acceptable.

Charge voltage is 110±2 V(only 48).

Max discharge current is not more than 2200 A.

The cell of one string can not used separately.