A flow test method and device for electric vehicle power battery thermal management pipeline

Abstract

Embodiments of the present invention disclose a flow testing method and device of an electric vehicle power battery thermal management pipe. The method comprises: arranging a contact flow meter, a heating component and a cooling component in a coolant main circuit of a thermal management pipe, recording first flow reading of the contact flow meter, dismantling the contact flow meter, the heating component and the cooling component in the coolant main circuit of the thermal management pipe, arranging a first non-contact flow meter and a regulating valve in the coolant main circuit, dismantlinga battery pack in each branch pipe, respectively arranging water chamber parts in all the branch pipes, adjusting an opening degree of a regulating valve so that the flow reading of the first non-contact flow meter is equal to the first flow reading and reading flow reading of each branch pipe through a second non-contact flow meter. The device reduces the thermal management connection components,has a simple structure, is easy to implement, reduces time and a material cost, has high measurement accuracy, has a large installation space and is easy to operate.

Description

technical field [0001] The present invention relates to the technical field of automobiles, and more particularly, to a flow testing method and device for a thermal management pipeline of a power battery of an electric vehicle. Background technique [0002] Energy shortages, oil crises and environmental pollution are intensifying, which have a huge impact on people's lives and are directly related to the sustainable development of the country's economy and society. All countries in the world are actively developing new energy technologies. As a new energy vehicle with reduced oil consumption, low pollution, and low noise, electric vehicles are considered to be an important way to solve the energy crisis and environmental degradation. [0003] In electric vehicles, the power battery drives the motor to generate power, so the performance and life of the power battery are the key factors affecting the performance of electric vehicles. Due to the limited space on the vehicle, ...

AI Technical Summary

Problems solved by technology

[0006] (1) Use the model built by each battery pack for flow test, especially for parallel pipelines, if there are multiple flow test points, then there will be many contact flowmeters installed or repeated tests will be repeated, which will increase the cost of time and materials, and The location where the contact flowmeter is installed is narrow and difficult to operate, or the contact flowmeter cannot be installed at all, and the flow rate of each pipeline cannot be accurately measured

[0007] (2) The thermal management components of the front cabin of electric vehicles are usually arranged according to the actual vehicle method, and the heating or cooling pipes and their components cannot be omitted, which increases the cost of components and the complexity of construction

[0008] (3) Most of the contact flowmeters are installed inside the pipeline. The contact flowmeter itself is prone to flow pressure loss and cannot accurately measure the pipeline flow.

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