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How To Keep An Electric Bus Battery At Optimal Performance?

Dec 29, 2022
Electric buses are the future of public transportation. They're cleaner, quieter and more efficient than their diesel counterparts. But electric bus batteries are heavy and expensive to replace, which makes thermal management even more crucial. The right thermal management system can help you keep your battery at the optimal temperature while ensuring its long lifespan.
electric buses

Batteries are the very Core of Electric Buses

Battery Pack: The battery pack of an electric bus is designed to meet the power requirements of an electric bus. It consists of several individual modules, which can be connected together depending on the bus type, size and range requirement. The battery pack is usually located under the floor of an electric bus.
Essential role: The battery is responsible for storing all of the energy required to drive an electric bus, therefore it is a crucial component in the electric bus's powertrain. That's why they need to be designed and built with care. Batteries also need to be able to operate under extreme conditions: they must be able to withstand mechanical shocks and vibrations, and withstand extreme temperatures.
electric bus battery

Battery Performance and Lifespan are Crucial Factors Influencing the Total Cost of Ownership (TCO) of Electric Buses

The TCO is defined as the total cost of ownership over a specified period of time, which includes initial purchase price, operating costs, maintenance costs and residual value. Batteries are the most expensive component in an electric bus and their performance directly influences the TCO of an electric bus.
Battery performance mainly includes two aspects: energy density and cycle life. Energy density refers to how much energy can be stored per unit volume and weight, while cycle life refers to how many times a battery can be charged and discharged until it reaches 80% capacity. The ideal battery has high energy density, long cycle life and good safety performance.
Batteries are a key component of electric buses, providing energy when needed, but only if they are managed properly. As a result, companies are looking for ways to improve battery performance and extend its lifetime.
Electric bus battery thermal management systems (BTMS) play a critical role in ensuring the safety and reliability of batteries during operation.

integrated BTMS for electric bus

Integrated BTMS for electric buses

Thermal Management Allows Batteries with the Longest Possible Lifespan

Thermal management allows batteries to operate at peak efficiency and with the longest possible lifespan. Proper TMS is required to increase the batteries' efficiency and lifetime. It is an important part of the battery design process for electric buses.

The BTMS is responsible for managing all aspects of battery operation including charging/discharging, balancing, temperature control, monitoring system health, and performance of batteries in order to maximize their life cycle.
The BMS also provides information on a real-time basis to the driver and fleet managers, enabling them to make informed decisions about how to maximize the life of the bus.

Successful TMS design requires a thorough understanding of the battery and its operating environment. The system must be designed 
1) to prevent overheating or overcharging while ensuring that the battery is sufficiently cooled during operation.
2) to monitor and manage the battery while also providing information on its health. 
3) to adjust cooling, charging, and other parameters in real time as conditions change. 
4) to function with minimal maintenance, which can be difficult given the harsh conditions faced by electric buses.

integrated battery thermal management system

Guchen Industry Provides Custom-made Battery Thermal Management Systems for Electric Buses

Guchen Industry is a professional manufacturer of electric bus climate control products, such as pure electric bus AC systems, integrated BTMS, independent battery chiller for electric buses etc.
We have developed our own battery thermal management system to meet the requirements of different customers. The system can be customized according to different cooling requirements and electrical parameters.
Guchen's BTMS are available in different configurations: 3kW, 4kW, 8KW, 9KW and 13kW capacity models. Our product line includes battery thermal management systems for electric vehicles, including electric bus, heavy trucks and light trucks. The product line also includes electric bus defroster and electric vehicle ac compressor.
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