Electric vehicle and its charging control method and charging system
A charging control method and electric vehicle technology, applied in electric vehicles, battery circuit devices, current collectors, etc., can solve problems such as short life of power batteries, prolong service life and achieve simple effects
Active Publication Date: 2019-11-08
BYD CO LTD
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] However, when the discharge voltage of the power battery is too low (for example, the voltage of a single-cell lithium iron phosphate battery is lower than 2.0V), it is difficult for the charger in the related art to take into account both the charging voltage and the charging current range, making the life of the power battery shorter
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0021] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicat...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a charge control method of an electric automobile. The charge control method of the electric automobile comprises the steps of controlling an N-line switching device and a pre-charge switching device to be in a closed state, and detecting whether the voltage of a power battery is less than a preset voltage threshold; if the voltage of the power battery is less than the preset voltage threshold, further detecting whether a charging current is greater than a first preset current threshold; and if the charging current is greater than the first preset current threshold, switching off the pre-charge switching device. The charge control method of the electric automobile can prolong the service life of the power battery efficiently, is easy to realize, can reuse a pre-charge resistor, the pre-charge switching device and the like in a pre-charge circuit, and is low in economic cost. The invention also discloses a charging system of the electric automobile and the electric automobile comprising the charging system of the electric automobile.
Description
technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an electric vehicle charging control method, an electric vehicle charging system and an electric vehicle. Background technique [0002] At present, the power battery of electric vehicles is gradually developing towards high voltage, and the charging and discharging voltage range of the power battery is relatively wide. For a 150-cell lithium iron phosphate battery, the discharge voltage range of the power battery is 300V to 547.5V. Therefore, a supporting charger must be provided to solve the charging problem of the power battery. The charging voltage designed by the charger in the related art fully satisfies the discharge voltage range and satisfies the charging current multiplier. [0003] However, when the discharge voltage of the power battery is too low (for example, the voltage of a single-cell lithium iron phosphate battery is lower than 2.0V), it is difficult f...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/04
Inventor 滕景翠邓林旺
Owner BYD CO LTD