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Method and device for controlling coolant flow distribution of electric vehicle drive system

A flow distribution and drive system technology, applied in the automotive field, can solve problems such as unreasonable flow distribution ratio of coolant, and achieve the effect of reducing control complexity, reducing power consumption, and reasonable flow distribution ratio coefficient

Active Publication Date: 2019-11-22
BORGWARD AUTOMOTIVE CHINA CO LTD
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Problems solved by technology

[0005] The purpose of the present disclosure is to provide a control method and device for the distribution of coolant flow in the driving system of an electric vehicle, which is used to solve the problem of unreasonable distribution ratio of the coolant flow of the electric vehicle

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  • Method and device for controlling coolant flow distribution of electric vehicle drive system
  • Method and device for controlling coolant flow distribution of electric vehicle drive system
  • Method and device for controlling coolant flow distribution of electric vehicle drive system

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Embodiment Construction

[0061] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0062] In the present disclosure, the control method is applied to an electric vehicle, and the electric vehicle may be a pure electric vehicle or a hybrid electric vehicle. The driving system of the electric vehicle includes a front-drive system and a rear-drive system, and the drive system adopts a circuit cooling form in which the front-drive circuit and the rear-drive circuit are connected in parallel. The cooling liquid flow distribution proportional coefficient is represented by k in this disclosure, and the cooling liquid flow distribution proportional coefficient refers to the ratio of the cooling liquid flow distributed to the front drive circuit div...

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Abstract

The invention discloses a method and device for control of coolant flow distribution of an electric automobile drive system. The control method comprises the steps that current temperatures of a front controller and a front motor in a front drive system, as well as current temperatures of a rear controller and a rear motor in a rear drive system are acquired; first ratios of the current temperatures of the front controller to the current temperatures of the rear controller, as well as second ratios of the current temperatures of the front controller to the current temperatures of the rear motor are computed; amplitude-limiting computation is conducted on maximum ratios among the first ratios and the second ratios, so coolant flow distribution proportional coefficients of a front drive loop and a rear drive loop are acquired; and the coolant flow distribution is conducted according to the coolant flow distribution proportional coefficients. The computation method for coolant flow distribution proportions disclosed by the invention considers the difference in cooling effects of a coolant with the same flow rate on the controllers and the motors, namely the coolant flow distribution proportions are more rational. Hence, the problem in irrational coolant flow distribution proportions of the electric automobile is solved.

Description

technical field [0001] The present disclosure relates to the field of automobiles, and in particular, relates to a method and device for controlling flow distribution of coolant in a drive system of an electric vehicle. Background technique [0002] The drive motor is the main source of traction power for electric vehicles (especially pure electric vehicles), and its cooling work has a major impact on the power, economy, and drivability of the vehicle. The drive system of an electric vehicle generally includes a front drive system and a rear drive system, and the matching cooling circulation loops have a series form or a parallel form. [0003] For the electric vehicle whose driving system adopts the cooling form of parallel circuit, the proportional coefficient k of coolant flow distribution between the front drive circuit and the rear drive circuit can be realized by an adjustable three-way valve device. The conventional k value calculation process is: respectively compar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60K11/02H02K9/19
CPCB60K11/02H02K9/19Y02T10/64
Inventor 高宝泉
Owner BORGWARD AUTOMOTIVE CHINA CO LTD
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