Electronic expansion valve control method and device, controller and power battery cooling system
A technology of electronic expansion valve and control method, which is applied in the field of electronic expansion valve control and power battery cooling system, which can solve the problems of slow control response and low precision of EXV opening control, so as to improve the opening control accuracy and ensure fast response Effect
Active Publication Date: 2020-03-13
GUANGZHOU AUTOMOBILE GROUP CO LTD
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Problems solved by technology
[0004] Based on this, it is necessary to provide an electronic expansion valve control method, device, controller and power battery cooling system for the problems of low precision of traditional EXV opening control and slow control response.
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[0057] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. A preferred embodiment of the invention is shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be thorough and complete.
[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0059] The tr...
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The invention relates to an electronic expansion valve control method and device, a controller and a power battery cooling system. The electronic expansion valve control method comprises the steps that at the end of a preset linear regulation period, the compressor speed value, the refrigerant superheat difference value and the power battery discharge power are obtained; based on opening dynamic regulation rules, the compressor speed value, the refrigerant superheat difference value and the power battery discharge power are processed to obtain the dynamic opening value; the opening dynamic regulation rules include opening negative feedback regulation, opening proportional integral control regulation and opening positive feedback regulation; and the opening of the electronic expansion valveis controlled according to the dynamic opening value. According to the electronic expansion valve control method and device, the controller and the power battery cooling system, the change of the heat load and cooling capacity of a system can be quickly and accurately responded, the opening control accuracy of the electronic expansion valve is improved, and the fast responsiveness of the openingcontrol is ensured.
Description
technical field [0001] The invention relates to the technical field of power battery temperature control, in particular to an electronic expansion valve control method, device, controller and power battery cooling system. Background technique [0002] With the advent of "electrification" of vehicles, the research and development of vehicle power batteries are in full swing. However, the power battery will generate a lot of heat when it is charged and discharged at a high current. In order to prevent thermal runaway, the application of the power battery cooling system is essential. The electronic expansion valve (Electronic Expansion Valve, EXV for short) is one of the key components of the power battery cooling system, and it is a throttling element that can enter the refrigerant flow into the refrigeration device according to a preset program. Compared with the widely used thermal expansion valve (Thermal expansion valve, TXV for short), EXV has a larger adjustment range, ...
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IPC IPC(8): F25B1/00F25B41/04F25B49/02F25B41/31
CPCF25B1/00F25B49/02F25B41/20
Inventor 徐磊刘嘉舜陈星龙辛聪向东
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD