Electric vehicle heating and charging circuit and charging method

A technology of electric vehicles and charging circuits, which is applied in the field of electric vehicle heating and charging circuits, can solve the problems of user inconvenience, limit the use value and popularization of electric vehicles, and achieve the effect of ensuring efficiency and shortening charging time

Inactive Publication Date: 2017-07-21
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Embodiments of the present invention provide a heating and charging circuit and charging method for electric vehicles to solve the problems in the prior art that cause inconvenience to users and limit the use value and popularization of electric vehicles when vehicles are charged at low temperatures

Method used

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  • Electric vehicle heating and charging circuit and charging method
  • Electric vehicle heating and charging circuit and charging method
  • Electric vehicle heating and charging circuit and charging method

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Embodiment Construction

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0047] An embodiment of the present invention provides a heating and charging circuit for an electric vehicle, such as figure 1 As shown, it includes: a battery pack 1, the battery pack 1 is connected to the charging pile 2; a vehicle controller 3 connected to the battery pack 1 and the charging pile 2; the vehicle controller 3 compares the temperature value of the battery pack 1 with the first temperature The threshold is compared with the second temp...

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Abstract

The invention provides an electric vehicle heating and charging circuit and a charging method. The electric vehicle heating and charging circuit comprises a battery pack connected with a charging pile, and a vehicle controller connected with the battery pack and the charging pile. The vehicle controller compares a temperature value of the battery pack with a first temperature threshold value and a second temperature threshold value to obtain a comparison result, and controls the heating and charging states of the battery pack according to the comparison result. According to the electric vehicle heating and charging circuit and the charging method, corresponding charging and heating strategies can be determined according to the temperature information of the battery pack, and fast charging and heating can be achieved under a low temperature condition; and meanwhile, normal charging time is not influenced even a vehicle is in the mode that charging and heating are conducted simultaneously, the charging time can be shortened effectively as the temperature of the battery pack increases, and convenience is provided for a user of the electric vehicle.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a heating and charging circuit and a charging method for electric vehicles. Background technique [0002] At present, my country's electric vehicles are in a stage of rapid development, but the rechargeable batteries of electric vehicles cannot be charged directly in low temperature environments. The current charging methods for electric vehicles are mainly DC fast charging and AC slow charging. Due to the low temperature in winter in some parts of my country, many electric vehicles have adopted a heating strategy for battery AC slow charging in order to be able to charge normally at low temperatures. However, there is no heating strategy for DC fast charging. When the vehicle wants to perform DC fast charging at low temperature, the battery must be heated to a certain temperature through AC slow charging before it can be converted to fast charging. When charging at low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18
CPCB60L58/12B60L58/27Y02T10/70
Inventor 豆斌斌张兆龙邓立军易迪华刘彪李杰王金龙张骞慧
Owner BEIJING ELECTRIC VEHICLE
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