Charging system for electric vehicle and electric vehicle comprising the same

Patent metadata

Field	Value
Publication number	US-9969290-B2
Application number	US-201214369946-A
Country	US
Kind code	B2
Filing date	Dec 31, 2012
Priority date	Dec 31, 2011
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

A charging system for an electric vehicle and an electric vehicle including the same are provided. The charging system includes: a power battery; a first charging interface and a second charging interface connected with an external power source respectively; a first charging control branch connected between the power battery and the first charging interface, and a second charging control branch connected between the power battery and the second charging interface; and a controller connected with the first charging interface and the second charging interface respectively.

First claim

What is claimed is:

1. A charging system for an electric vehicle, comprising:
a power battery;
a first charging interface connected with a first external charging device, and a second charging interface connected with a second external charging device, both the first external charging device and the second external charging device being connected with an external power source;
a first charging control branch connected between the power battery and the first charging interface, and a second charging control branch connected between the power battery and the second charging interface; and
a controller connected with the first charging interface and the second charging interface respectively,
wherein during a charge, the controller is configured to:
control the first charging control branch to start to establish a charging path between the power battery and the first charging interface until the first charging control branch enters a half-load operation state in which a charging power of the first charging control branch reaches half-load;
control the second charging control branch to start to establish a charging path between the power battery and the second charging interface until the second charging control branch enters a half-load operation state in which a charging power of the second charging control branch reaches half-load;
after both the first charging control branch and the second charging control branch entered the half-load operation state and stably operate in the half-load state, adjust an operation power of the first charging control branch and an operation power of the second charging control branch so as to make the first charging control branch and the second charging control branch enter a full-load operation state respectively.

2. The charging system according to claim 1 , further comprising:
a high-voltage distribution box connected with the power battery and comprising:
a first pre-charging control module and a first switch connected with the first pre-charging control module in parallel, wherein a first terminal of the first pre-charging control module and a first terminal of the first switch are connected with a first terminal of the power battery respectively, and a second terminal of the first pre-charging control module and a second terminal of the first switch are connected with a second terminal of the first charging control branch and a second terminal of the second charging control branch;
a driving control switch having a first terminal connected with the first terminal of the power battery, and connected with a third terminal of the first charging control branch and a third terminal of the second charging control branch respectively,
wherein the first pre-charging control module, the first switch and the driving control switch are connected with the controller respectively.

3. The charging system according to claim 2 , wherein when the electric vehicle is in a charge-discharge mode, the controller pre-charges the first charging control branch and the second charging control branch via the first pre-charging control module and controls the first pre-charging control module to turn on, and when a bus voltage of the first charging control branch and a bus voltage of the second charging control branch are a predetermined multiple of a voltage of the power battery, the controller controls the first pre-charging control module to turn off and controls the first switch to turn on.

4. A charging system for an electric vehicle, comprising:
a power battery;
a first charging interface connected with a first external charging device, and a second charging interface connected with a second external charging device, both the first external charging device and the second external charging device being connected with an external power source;
a first charging control branch connected between the power battery and the first charging interface, and a second charging control branch connected between the power battery and the second charging interface; and
a controller connected with the first charging interface and the second charging interface respectively,
wherein during a charge, the controller is configured to:
control the first charging control branch to start to establish a charging path between the power battery and the first charging interface until the first charging control branch enters a half-load operation state in which a charging power of the first charging control branch reaches half-load;
control the second charging control branch to start to establish a charging path between the power battery and the second charging interface until the second charging control branch enters a half-load operation state in which a charging power of the second charging control branch reaches half-load;
adjust an operation power of the first charging control branch and an operation power of the second charging control branch so as to make the first charging control branch and the second charging control branch enter a full-load operation state respectively;
wherein the charging system further includes:
a high-voltage distribution box connected with the power battery and comprising:
a first pre-charging control module and a first switch connected with the first pre-charging control module in parallel, wherein a first terminal of the first pre-charging control module and a first terminal of the first switch are connected with a first terminal of the power battery respectively, and a second terminal of the first pre-charging control module and a second terminal of the first switch are connected with a second terminal of the first charging control branch and a second terminal of the second charging control branch;
a driving control switch having a first terminal connected with the first terminal of the power battery, and connected with a third terminal of the first charging control branch and a third terminal of the second charging control branch respectively,
wherein the first pre-charging control module, the first switch and the driving control switch are connected with the controller respectively;
wherein each of the first charging control branch and the second charging control branch comprises:
a bidirectional DC/DC module having a first DC terminal connected with a second terminal of the power battery and a second DC terminal connected with a second terminal of the first switch, wherein the first DC terminal is a common DC terminal for an input to and an output from the bidirectional DC/DC module;
a bidirectional DC/AC module having a first DC terminal connected with a second terminal of the driving control switch and a second DC terminal connected with the second terminal of the power battery;
a charge-discharge control module having a first terminal connected with an AC terminal of the bidirectional DC/AC module, wherein a second terminal of the charge-discharge control module of the first charging control branch is connected with the first charging interface, and a second terminal of the charge-discharge control module of the second charging control branch is connected with the second charging interface.

5. The charging system according to claim 4 , further comprising:
a motor control switch having a first terminal connected with the AC terminal of the bidirectional DC/AC module and a second terminal connected with a motor, and controlled by the controller, wherein when the electric vehicle is in a driving mode, the controller controls the motor control switch to turn on.

6. The charging system according to claim 5 , wherein when a current operation mode of the charging system is the driving mode, the controller controls the driving control switch to turn on to stop the bidirectional DC/DC module, controls the motor control switch to turn on, and controls t

Assignees

• Shenzhen Byd Auto R&D Co Ltd
• Byd Co Ltd

Inventors

• Tang Zheqing
• Du Zhiyong
• Tang Fu

Classifications

• B60L50/60

  using power supplied by batteries (in combination with fuel cells B60L50/75) · CPC title

• H02J2105/37

  exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV] · CPC title

• H02J4/25

  for transfer of electric power between AC and DC networks, e.g. for supplying the DC section within a load from an AC mains system · CPC title

• H02J7/977

  of the battery · CPC title

• H02J7/865

  Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence) · CPC title