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Electric vehicle and its starting method and power system

A technology for electric vehicles and power systems, applied in electric vehicles, electric traction, power management, etc., can solve the problems of increasing cost and battery space, difficult to achieve, etc., and achieve the effect of easy implementation and improved ignition ability.

Active Publication Date: 2018-09-07
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of the above-mentioned related technologies are: it needs to increase the cost and the space occupied by the battery, and it needs to be redesigned and laid out, which is not easy to realize

Method used

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  • Electric vehicle and its starting method and power system
  • Electric vehicle and its starting method and power system
  • Electric vehicle and its starting method and power system

Examples

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Embodiment Construction

[0022] 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.

[0023] 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...

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Abstract

The invention discloses a power system of an electric automobile. The power system comprises a generator, a power cell, a power cell management machine, a starting machine, a bidirectional DC / DC converter, a starting cell, and a starting cell management machine, wherein the power cell is used for providing electric energy for the electric automobile; the starting machine is used for starting the generator; a high-voltage end of the bidirectional DC / DC converter is connected with the power cell; the starting cell is connected with a lower-voltage end of the bidirectional DC / DC converter and is used for supplying electricity for the starting machine; the starting cell management machine is used for detecting the temperature of the starting cell, and when the temperature of the starting cell is lower than a preset temperature, the starting cell management machine controls the bidirectional DC / DC converter, so that the starting cell discharges to the power cell. According to the power system disclosed by the invention, the striking capacity of the complete automobile under the ultralow temperature environment can be improved, the cost does not need to be increased, and the occupied space of the cell does not need to be enlarged. The invention further discloses the electric automobile comprising the power system of the electric automobile and a starting method of the electric automobile.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a starting method of the electric vehicle, a power system of the electric vehicle and an electric vehicle. Background technique [0002] At present, the starting batteries used in most fuel vehicles are lead-acid batteries. Discarded lead-acid batteries and produced lead-acid batteries are extremely polluting to the environment and seriously endanger human health. At the same time, lead-acid batteries have disadvantages such as large self-discharge, low specific capacity, and poor cycle. Therefore, safe and environmentally friendly lithium-ion secondary batteries are used Replacing traditional lead-acid batteries will become a future development trend. However, due to the inherent characteristics of lithium-ion battery materials, under the current technical conditions, it is difficult to guarantee excellent ultra-low temperature (-30°C and below) and high-rate discharg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L11/18
CPCY02T10/70Y02T10/72
Inventor 王聪刘彦初潘晓萍马爱丽
Owner BYD CO LTD
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