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What is Battery Thermal Management System?
Battery thermal management system is a system that keeps the electric vehicle power battery within a suitable temperature range. Its existence increases the service life of the battery and ensures the safety and driving mileage of the entire vehicle. Its abbreviation is BTMS. But BTMS is often used to refer to betamethasone or emulsifying wax. To differentiate, I will refer to it as a BTMS battery below.
Battery Liquid Cooling Principle
The main principle of cooling is that the coolant contacts the battery core through the water pipe. Currently, a mixed solution of water and ethylene glycol is mostly used. The liquid cooling BTMS battery system couples a heat exchanger to the refrigeration cycle to remove heat from the battery through the refrigerant. Its core components are the compressor, heat exchanger and water pump. As the starting point of refrigeration power, the compressor determines the heat exchange capacity of the entire system. The heat exchanger plays a role in exchanging refrigerant and coolant. The amount of heat exchanged directly determines the temperature of the coolant. The water pump determines the flow rate of the coolant in the pipeline. The faster the flow rate, the better the heat exchange performance, and vice versa.
BTMS Battery Installation Requirements
BTMS battery is connected to high-voltage batteries, and the voltage is usually above 280v. Be careful and pay attention to personal safety during installation, commissioning and maintenance.
Location & Direction
1. The expansion water tank must be located at the highest point of the entire system. And an overflow pipe must be arranged. The overflow pipe is a device that can instantly warn the water level. It is very important for the safe use of the BTMS battery. The exhaust pipe of the expansion water tank has a smooth passage. The pipe cannot have a curved design, otherwise water will easily accumulate in the curved part, which will lead to failure. The expansion water tank water pipe runs smoothly and ensures that the water line can continue to flow downwards during operation.
2. BTMS battery should be installed in the direction required by the “drawings” and random rotation is strictly prohibited. It must be ensured that the axis of the compressor is perpendicular to the direction of vehicle travel.
3. The driving environment of vehicles is different, and there is often water wading. The installation location for side-mounted BTMS battery system is usually on the chassis. It cannot operate in water, so it must exceed the vehicle’s wading height.
Pipeline & Waterway
1. The main pipe of the BTMS battery should be smooth and not deformed. At the same time, avoid too many curves and undulations. Too much will cause excessive flow resistance and affect system flow.Unsmooth and efficient flow will lead to reduced cooling effect.
2. The exhaust tee-water injection tee-water pump water inlet (battery cooling module water inlet) should be arranged and connected in a pipeline from high to low. The reason for this is to facilitate the removal of air.
3. Ensure that the air inlet and outlet of the battery thermal management system are smooth. If the air inlet and outlet are not clear, it can easily lead to poor cooling effect. In severe cases, it will cause a high-voltage alarm and stop working. Secondly, do a good job of waterproof sealing to ensure that there is no cross-wind phenomenon.
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| BTMS battery 10kw |
BTMS Battery Case
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