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A new energy vehicle charging system and its control method

A new energy vehicle and charging system technology is applied in the field of new energy vehicle charging to achieve the effect of shortening charging time and reducing charging waiting time

Active Publication Date: 2021-11-12
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, no domestic and foreign patents have proposed a control method for simultaneous charging of AC and DC vehicles, which is a blank state

Method used

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  • A new energy vehicle charging system and its control method
  • A new energy vehicle charging system and its control method
  • A new energy vehicle charging system and its control method

Examples

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Effect test

Embodiment 1

[0030] This embodiment provides a charging system for new energy vehicles capable of simultaneously charging AC and DC for new energy vehicles.

[0031] In order to solve the above-mentioned technical problems, according to the requirements of GB / T 18487.1 on the AC slow charge control guide circuit and the DC fast charge control guide circuit, the present invention proposes a control method for AC and DC simultaneous charging by taking the AC slow charge charging mode 3 connection mode B as an example .

[0032] A new energy vehicle charging system, including charging mode 3 connection mode B AC charging cable, DC charging cable, on-board charger (Charger), battery management system (BMS) and vehicle control unit (HCU).

[0033] The charging mode 3 connection mode B AC charging cable is used to connect the AC charging pile and the electric vehicle; the DC charging cable is used to connect the DC charging pile and the electric vehicle; the vehicle charger belongs to the AC cha...

Embodiment 2

[0044] This embodiment provides a new energy vehicle charging control method capable of realizing simultaneous AC and DC charging of the new energy vehicle.

[0045] In this embodiment, a control method for simultaneous charging of AC and DC is proposed by setting the following three charging situations:

[0046] (1) AC and DC simultaneous charging, that is, the AC charging pile and the DC charging pile are connected to the electric vehicle at the same time. When the vehicle control device judges that the AC and DC simultaneous charging entry conditions are met, the vehicle enters the AC and DC simultaneous charging process. Such as figure 2 As shown, the vehicle control device sends to the battery management system an instruction to allow AC charging and an instruction to allow DC charging. The battery management system sends the charging voltage and current commands to the on-board charger and the DC charging pile after receiving the command to allow AC charging and the co...

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Abstract

The invention discloses a charging system for a new energy vehicle, comprising a charging mode 3 connection mode B AC charging line, a DC charging line, an on-board charger, a battery management system and a vehicle control device; the on-board charger is used to convert alternating current into direct current ; The battery management system is used to monitor the state of the power battery and the current remaining power; the vehicle control device is used to judge whether the vehicle meets the AC and DC charging entry and exit conditions based on comprehensive vehicle information, and control the vehicle to enter and exit the AC and DC charging process. The invention can realize the simultaneous charging of AC and DC of the whole vehicle, can shorten the charging time of the whole vehicle, reduce the charging waiting time of users, and does not increase additional hardware costs, and all technical solutions can be realized only by changing the software, and compared with the increase in current or voltage The high-power charging solution does not need to increase the cooling system, which is safer.

Description

technical field [0001] The invention relates to the technical field of new energy vehicle charging, in particular to a new energy vehicle charging system and a control method thereof. Background technique [0002] With the increasing popularity of new energy vehicles, users' demand for driving range of new energy vehicles continues to increase. At present, the only way to solve users' "mileage anxiety" is to increase the capacity of the vehicle's power battery. Although new energy vehicles are equipped with AC slow charging and DC fast charging, the output power of the car charger has gradually increased from 3.3kW at the beginning to 6.6kW, 10kW or even 20kW, 40kW, but it is limited by the capacity of the public grid. Restrictions and the popularity of charging infrastructure will lead to a substantial extension of charging time, hindering the comfortable use of new energy vehicles. [0003] For the two charging methods, compared with AC slow charging, DC fast charging ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L58/12B60L53/10B60L53/14B60L53/20
CPCY02T10/70Y02T10/7072Y02T90/14
Inventor 刘健姜瑞
Owner CHINA FIRST AUTOMOBILE
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