Lithium battery charging control method special for electric car
A charging control method and technology for pure electric vehicles, applied in electric vehicle charging technology, electric vehicles, battery/fuel cell control devices, etc. Lithium battery damage and other problems, to achieve the effect of safe and efficient charging control
Active Publication Date: 2017-11-03
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
At present, in the field of new energy, the charging control method for lithium batteries is mainly controlled by the battery management system and the on-board charger. However, in the way of optimizing the on-board charger to improve the charging efficiency of the lithium battery, the on-board charger usually charges with a large charging current, which ignores the state of the lithium battery itself, and easily causes the charging current of the lithium battery to be too large It will cause damage to the lithium battery and affect the service life of the lithium battery.
Moreover, the influence of the vehicle state on charging is ignored during the charging process, and the safety performance of the vehicle cannot be well guaranteed.
Method used
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[0023] The technical solution of the present invention will be described in further detail below in combination with specific embodiments according to the drawings in the description.
[0024] Combine below figure 1 A brief description of the charging control system of the present invention:
[0025] Such as figure 1 As shown, the charging system is mainly composed of an AC charging pile or a 220V household socket, a vehicle controller VCU, an on-board charger OBC, a lithium-powered battery pack, and a battery management controller BMS. The charging interface and the on-board charger are connected through the charging interface connection signal (CC signal) and the control pilot signal (CP signal), and the vehicle controller VCU, the on-board charger OBC, and the battery management controller BMS are connected through the CAN bus. Information exchange. The vehicle controller VCU manages the vehicle system and coordinates the work of the entire charging system. The battery m...
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The invention discloses a lithium battery charging control method special for an electric car. The lithium battery charging control method special for the electric car comprises the following steps that, A, after a charging gun is inserted, all parts of a charging system is aroused, connection of a charging plug is confirmed, and the parts comprises a whole car controller, a car-mounted charging machine and a battery managing controller; B, after the connecting state is confirmed, system self-detecting before charging is conducted; C, if there is no abnormal conditions, the whole car controller sends a charging starting order to the car-mounted charging machine, and normal charging of the car-mounted charging machine is conducted according to the final charging current; and D, if charging is abnormal or charging is completed, the whole car controller sends a charging stopping order to the car-mounted charging machine for stopping charging. According to the lithium battery charging control method special for the electric car, the whole car controller is in communication with the car-mounted charging machine and the battery managing controller through a CAN bus wire, the whole car controller plays supervising and monitoring roles in the whole charging process, the whole car safety performance during charging is improved, meanwhile, the lithium battery charging efficiency is efficiently improved, and the service life of the lithium battery is prolonged.
Description
technical field [0001] The invention belongs to the field of new energy vehicles, and in particular relates to a charging control method for a lithium battery used in a pure electric vehicle. Background technique [0002] Power battery is the core energy source of pure electric vehicles, and lithium battery is a new type of battery, which has the characteristics of high energy, high safety, high stability, long life and environmental protection, and lithium battery has no memory effect, can be discharged It can be charged at any point in the cycle and can maintain the charge very effectively, so it is widely used in the fields of electric vehicles and energy vehicles. At present, in the field of new energy, the charging control method for lithium batteries is mainly controlled by the battery management system and the on-board charger. However, in the way of optimizing the on-board charger to improve the charging efficiency of the lithium battery, the on-board charger usuall...
Claims
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Login to View More IPC IPC(8): B60L11/18
CPCB60L53/60B60L58/10B60L58/12Y02T10/70Y02T10/7072Y02T90/12Y02T90/14Y02T90/16
Inventor 陈秋利付振元李巍华张润生
Owner SOUTH CHINA UNIV OF TECH