Device and method for managing energy of lithium batteries of electric vehicles

An electric vehicle and energy management technology, which is applied in electric vehicles, electrical devices, measuring devices, etc., can solve the problems of lithium battery nonlinearity, shortened battery life, and reduced performance of battery packs, so as to ensure safe use and improve service life Effect

CN102009595AInactive Publication Date: 2011-04-13LINQING XUNHUA SPECIAL VEHICLE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2011-04-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a device for managing energy of lithium-ion power batteries of electric vehicles and provides a system for managing energy of lithium-ion power batteries of electric vehicles. The system is installed on the vehicle, can monitor the lithium-ion power batteries in real time and can properly control charge and discharge according to the charge and discharge requirements of the lithium-ion power batteries. In the invention, each integrated lithium-ion power battery is controlled by a special control chip, the trickle precharge, quick constant-current charge, constant-voltage charge and supplementary pulse charge occluded stage methods are adopted in the charge process, and equalization discharge control is adopted in the discharge process, which is beneficial to stability of the output voltage and ensures good running smoothness of the electric vehicles. The special control chips have unique address codes and a microprocessor of the system can read and write the information of the special chips. Equalization of charge and discharge processes of each group of lithium-ion power batteries is achieved according to the acquired battery voltage, charge and discharge current and voltage variation of energy transmission control modules of the temperature information control system.
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Description

technical field

[0001] The invention belongs to the field of energy management of electric vehicles, and in particular relates to a management and control method for the charging and discharging process of a lithium power battery pack used in electric vehicles. Background technique

[0002] With the soaring price of international crude oil, the research of various new energy sources has become the focus of public attention. There has been an upsurge in the development of various electric vehicles in China. Lithium power battery has high specific energy density and specific power, which greatly reduces the weight of the on-board battery pack, has no memory effect, can be recharged many times, and has a long service life. It has become the first choice for power electric energy. Batteries are still the bottleneck in the commercialization of electric vehicles. In order to use the battery safely and efficiently, it is very important to develop a battery energy management syste...

Examples

Embodiment Construction

[0037] Below in conjunction with accompanying drawing and example the present invention is described in further detail;

[0038] Such as figure 1 , The electric vehicle power source management system of the present invention includes: lithium power battery control and detection device 1, single cell lithium power battery 2, interface circuit 5, microcontroller 7, display module 6, alarm module 9 and communication module 8, etc.

[0039] Among them, the lithium power battery control and detection device 1 can monitor parameters such as the voltage, charge and discharge current, and temperature of the single cell lithium power battery 2 in real time, and input the signal to the microcontroller 7 through the data bus 4 and the interface circuit 5, and the microcontroller 7 Controlling the energy transmission control module 3 to adjust the voltage and current transmitted through the energy transmission line 10 .

[0040] N integrated lithium power battery systems are connected in...