Power lithium iron phosphate battery pack management system for electric automobiles and working method of system

A technology for battery pack management and electric vehicles, applied in battery pack components, secondary battery repair/maintenance, circuits, etc., can solve the problems of restricting the development of electric vehicle technology, good platform characteristics, and small voltage differences, and improve the use of Life, improve safety performance, prolong the effect of life

Inactive Publication Date: 2011-05-04
SHANGHAI INST OF SPACE POWER SOURCES
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  • Description
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AI Technical Summary

Problems solved by technology

[0003] The power lithium iron phosphate battery pack is a new type of battery pack. The difference between it and the traditional lithium-ion battery pack is that it has good platform characteristics and small voltage differences under different states of charge. The control method is no longer suitable, which restricts the development of electric vehicle technology

Method used

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  • Power lithium iron phosphate battery pack management system for electric automobiles and working method of system
  • Power lithium iron phosphate battery pack management system for electric automobiles and working method of system
  • Power lithium iron phosphate battery pack management system for electric automobiles and working method of system

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Embodiment approach

[0028] The implementation is as follows, see in conjunction with figure 1 , figure 2 , image 3 , Figure 4 :

[0029] like figure 1 As shown, a power lithium iron phosphate battery pack management system for electric vehicles includes 9 module management devices 1, 1 overall management device 2, positive power high voltage contactor 3, negative power high voltage contactor 4, pre-charging Resistor 5, pre-charging high-voltage contactors 6 and 7, charging high-voltage contactor 8, temperature control system fan 9. The module management device 1 is connected to the battery group, collects the voltage and temperature signals of the battery group modules, and exchanges information with the overall management device 2 through the CAN network. The overall management device 2 controls the on-off of the positive power high-voltage contactor 3, the negative power high-voltage contactor 4, the pre-charging high-voltage contactors 6 and 7, the charging high-voltage contactor 8, an...

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Abstract

The invention belongs to the field of battery pack management systems, and aims to provide a power lithium iron phosphate battery pack management system for electric automobiles and a working method of the system. The invention is characterized in that all lithium iron phosphate batteries forming the battery pack are uniformly divided into a plurality of battery sub-packs; each module management device (1) is connected with one battery sub-pack to acquire voltage and temperature signals of the battery sub-pack, and communicates with a general management device (2) through a controller area network (CAN); and the general management device (2) controls the on-off state of a positive terminal power high-voltage contactor (3), a negative terminal power high-voltage contactor (4), precharging high-voltage contactors (6 and 7) and a charging high-voltage contactor (8), and the operation of a temperature control system fan (9). In the invention, the problem in managing the power lithium iron phosphate battery pack for electric automobiles is solved, the high-voltage safety of the battery pack is ensured and the service life of the battery pack is prolonged.

Description

technical field [0001] The invention belongs to the field of battery pack management systems. Specifically, the invention relates to a management system and a working method of a power lithium iron phosphate battery pack for an electric vehicle. technical background [0002] Lithium-ion battery packs are used more and more widely, and are gradually used in electric bicycles, electric vehicles, large-scale energy storage systems, etc. Lithium-ion battery pack management systems and their working methods are one of several key technologies that affect the widespread application of lithium-ion battery packs . The new system power lithium iron phosphate battery pack has the advantages of good safety performance and long cycle life, which promotes the development of the electric vehicle industry. However, in the past few years, all units and scientific research institutes have studied lithium cobalt oxygen system, lithium manganese oxygen system and ternary system power battery...

Claims

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Application Information

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IPC IPC(8): H01M10/42H01M2/20
CPCY02E60/10
Inventor 蒋新华刘勇那伟周钦哲解晶莹
Owner SHANGHAI INST OF SPACE POWER SOURCES
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