Battery Thermal Management in Electric Vehicles

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Battery Thermal Management

in Electric Vehicles 

 

 

The EHP series thermal management units have advantages such as high efficiency, safety, environmental protection, CAN 2.0 communication, and fault self-diagnosis. They can realize three functional modes: cooling, heating (optional), and self-circulation.

 

The EHP series thermal management unit is a cooling system used to cool the battery packs of new energy vehicles.

 

During vehicle operation or charging, the battery pack temperature rises due to ambient temperature or the battery pack's own charging and discharging characteristics, causing the battery to lose its optimal operating environment. This product is designed for water-cooled battery packs. By controlling the water temperature, it ensures the battery pack operates within a specific temperature range, thereby guaranteeing battery quality, extending its lifespan, and ensuring the vehicle's driving range.

 

Compared to traditional cooling methods, this product features rapid heat dissipation, high efficiency, stable temperature control, significantly improved battery performance, and extended lifespan.

 

 

 

 

Model	NFEHP3.0-3
Working environment	-20~55℃
Refrigerant	R1234yf/R134A
Cooling liquid	50% 50% ethylene glycol/water solution
High voltage	540VDC (450-720VDC)
Low voltage	24VDC (18-32VDC)
Rated refrigeration capacity	4.5KW
Rated heating capacity	5KW
Overvoltage protection/overvoltage recovery	750/720V DC
Under-voltage protection/Under-voltage recovery	400/430V DC
Box color	Black
Weigh	＜35kg
Waterproof protection level	IP67

 

 

 

 

 

 

Figure 1-1 Working principle diagram of water-cooled unit

 

The schematic diagram of the EHP battery thermal management system is shown in Figure1-1. Red represents the cooling cycle, and blue represents the coolant cycle. The unit has three modes: cooling mode, heating mode (optional), and self-circulation mode. The unit switches between these three modes based on parameters fed back from the battery pack BMS.​

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• Before operating the unit, a grounding wire must be connected.

• Before operating the unit, check that the water pipes are secure to prevent antifreeze splashing due to pressure buildup after operation.

• Before operating the unit, check that all electrical components and connectors are installed in the correct positions and are not loose.

• Before operating the unit, confirm that the positive and negative terminals of the high-voltage connectors match the drawings.

 

 

 

 

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