The demand for efficient and environmentally friendly power systems in the construction machinery industry is constantly increasing. As an important component of the power supply solution for engineering vehicles, 540v power lithium battery solution is characterized by high voltage, high energy density, safety and reliability, it is widely used in various engineering vehicles, such as excavators, loaders, bulldozers, aerial work platforms, etc. This article will briefly introduce the power lithium battery scheme of 540v engineering vehicle, covering its composition structure, technical parameters, performance characteristics, application scenarios and precautions for installation and use, help understand the core advantages and application value of this solution.

I. Scheme overview

the 540v power lithium battery solution usually refers to a battery pack composed of multiple lithium-ion battery monomer series, with a nominal voltage of about 540V, which is suitable for the demand of engineering vehicles for high-voltage and high-power power power supply. This kind of battery pack is mainly lithium iron phosphate (LiFePO4) or ternary lithium battery, which has high energy density, long service life and excellent safety performance, and can provide continuous and stable power output for engineering vehicles.

II. Scheme structure

1. Battery monomer

the core of power lithium battery solution is high-performance battery monomer. Common cell type are:

• lithium iron phosphate battery (LiFePO4): high safety, long cycle life, good thermal stability, suitable for high-intensity use environment.
• Ternary lithium battery (NMC): higher energy density, small volume, light weight, suitable for engineering vehicles with high requirements on endurance and volume.

2. Battery module and assembly

battery cells are combined into modules in series and parallel, and multiple modules are regrouped to form the whole group of battery packs. Modular design facilitates production, maintenance and replacement. The 540v battery pack generally contains about 140 cells connected in series, and the specific number is determined according to the voltage and capacity of the cells.

3. Battery management system (BMS)

BMS is the "brain" of the battery pack. It is responsible for monitoring key parameters such as battery voltage, current, temperature, SOC (remaining battery power), SOH (battery health status) and so on to ensure safe and efficient operation of the battery. BMS also implements balanced management to prevent uneven power between cell, prolong battery life, and has protection functions such as overcharge, overdischarge, overcurrent, short circuit, and abnormal temperature.

4. Heat dissipation system

the working environment of engineering vehicle battery pack is complex, and the design of heat dissipation system is particularly important. Air cooling or liquid cooling technology is commonly used to ensure that the battery temperature is kept within a reasonable range to avoid performance degradation or potential safety hazards caused by overheating.

5. Shell and interface

the battery pack shell is made of high-strength protective materials and has the function of waterproof and dustproof, meeting the requirements of IP54 and above levels and adapting to harsh working conditions. The electrical interface design conforms to the high current transmission standard to ensure safe and reliable connection.

III. Main technical parameters

IV. Performance characteristics

1. High voltage and high power output

540v high-voltage design meets the demand of engineering vehicles for high-power power, realizes high-efficiency motor drive, and improves vehicle power performance and operation efficiency.

2. Long service life and high reliability

using high-quality cell and advanced BMS technology, it can withstand long-term high-intensity charge-discharge cycles, with a cycle life of more than 2,000 times, significantly reducing the replacement frequency and maintenance cost.