NF EV Battery Thermal Management Solution

Short Description:

Battery Thermal Management (BTM) for electric buses is a specialized temperature control system designed specifically for large-capacity, high-safety, long-lifespan, and all-climate operations. Its core objective is to maintain Lithium Iron Phosphate (LFP) batteries within a stable temperature range of 25–40°C—with a module temperature differential of ≤ 3–5°C—while meeting the requirement for two-hour thermal runaway protection (as mandated by the new 2026 national standard). Compared to passenger vehicles, electric buses place a greater emphasis on high reliability, robust cooling capabilities, low-temperature preheating, safety redundancy, extended driving range, and ease of maintenance.

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Product Detail

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Product Description

Battery thermal management system keep electric vehicle battery pack temperatures within the right range to maintain their longer driving range and extend battery life. We also call it BTMS Battery or Battery Chiller or Battery Pack Cooling System.

We specializes in developing thermal management systems for electric bus batteries, electric truck batteries, electric boat batteries and electric heavy equipment batteries. With a cooling/heating capacity of 3KW-10KW, they keep the temperature of the power battery pack in the optimal range by means of coolant cooling and PTC heating. This allows electric vehicles to achieve longer range and service life.

The optimal operating temperature of the battery is 20° to 45°. If this temperature is exceeded, the driving range and the life of the battery will drop dramatically. What’s more, it may also affect the surrounding equipment and cause the consequences of combustion and explosion. That’s why electric vehicles especially need a battery thermal management system, which we also call a BTMS or battery cooler or battery pack cooling system.

If the battery is below this temperature, its electrochemical reaction activity will become poor and the performance of the battery will be greatly reduced. It may even cut off the power directly. Our product can heat it, so we call it battery heating or battery heater.

Product Parameter

NO.	Project	Parameter Specifications
1	Model	EHP6.0-1
2	Refrigeration capacity	7kW
3	Heating capacity	8kW
4	Rated voltage	600V DC
5	Low voltage power supply	18-32V DC
6	Overvoltage protection/recovery voltage	750/720V DC
7	Undervoltage protection/recovery	400/430V DC
8	Refrigerant carrier	50%/50%Ethylene Glycol/Water Solution
9	Refrigerant	R134a
10	Compressor displacement	34cc
11	working temperature	-40℃～50℃
12	Unit protection level	IP67
13	Outer diameter of water inlet pipe	Φ20mm
14	Outer diameter of water outlet pipe	Φ20mm
15	Total weight	＜55kg
16	Overall dimensions	See drawings
17	Installation method	M10 bolt installation
18	Installation dimensions	See drawings
19	Communication method	CAN2.0

Working Principle

The schematic diagram of our EHP battery thermal management system is shown in Figure 2-1. The solid red line in the figure represents the refrigeration cycle, and the dashed blue line represents the coolant cycle. This unit has three modes, including cooling mode, heating mode, and self-circulation mode. The unit switches between these three modes based on the parameters feedback from the battery pack BMS.