Method and equipment for establishing flow field simulation model of liquid cooling system of battery changing device

Abstract

The invention discloses a method and equipment for establishing a flow field simulation model of a liquid cooling system of a battery changing device. The method comprises the following steps: acquiring set flow resistance, calculated flow resistance, a first flow velocity and a first inertial coefficient value of a flow channel of the battery pack thermal management system, and determining a first viscosity coefficient value according to the set flow resistance, the calculated flow resistance, the first flow velocity and the first inertial coefficient value; according to the first inertial coefficient value and the first viscosity coefficient value, establishing an initial model of flow field simulation of the liquid cooling system of the battery changing device; simulating the initial model, performing an entity test on the liquid cooling system of the battery changing device, or simulating a battery pack thermal management system model, correcting the first inertial coefficient value to be a second inertial coefficient value, and correcting the first viscosity coefficient value to be a second viscosity coefficient value; and according to the second inertia coefficient value and the second viscosity coefficient value, establishing a correction model of the liquid cooling system flow field simulation of the battery changing device. According to the invention, the effect of reducing the flow field simulation error of the liquid cooling system of the battery replacement device is achieved.

Description

technical field [0001] The embodiments of the present invention relate to the field of simulation technology, and in particular to a method and equipment for establishing a flow field simulation model of a liquid cooling system of a power exchange device. Background technique [0002] The power exchange device is a key component of the vehicle power exchange station. The thermal management performance of the power exchange device is related to whether it can work normally. To ensure the thermal management performance, it is necessary to ensure the performance of the flow field of the liquid cooling system of the power exchange device. Therefore, it is necessary to In the early stage of the design of the power exchange device, the flow field of the liquid cooling pipeline of the power exchange device was simulated and analyzed by means of simulation, and the uniformity and flow resistance of the flow field were checked. [0003] In the initial stage of design, the flow channe...

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Problems solved by technology

[0003] In the initial stage of design, the flow channel of the battery pack thermal management system has not been designed in detail, and often only a rough flow resistance requirement can be given. The flow resistance of the battery pack thermal management system flow channel is generally relatively large. The liquid cooling system of the battery pack is simulated , if the flow resistance of the flow channel of the battery pack thermal management system is directly ignored, the error of the flow field simulation results of the liquid cooling system of the power exchange device will be large

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