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Lithium ion battery management system and method

A lithium-ion battery and management system technology, applied in the field of lithium-ion battery management systems, can solve problems such as inconsistent working status, large working current, and battery heating, and achieve the effect of convenient and stable collection

Inactive Publication Date: 2012-03-21
TSINGHUA UNIV
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0003] Lithium-ion batteries are often in a state of large current changes under vehicle operating conditions, and the operating current is large, and the battery heat is very serious; the working status of each battery cell in the battery pack is inconsistent; the characteristics of lithium-ion batteries determine that they are not resistant to overheating Charging and over-discharging; the high voltage of the battery may cause danger to the passengers in the car

Method used

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  • Lithium ion battery management system and method
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  • Lithium ion battery management system and method

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Embodiment Construction

[0044] The lithium-ion battery management system in the present invention adopts a master-slave distributed design mode: the system includes a master controller and four slave controllers (or multiple). The main controller can measure the total voltage, current, ambient temperature and temperature of the controller itself, and calculate the SOC of the battery based on the initial SOC estimated by the four slave controllers. The main controller communicates with the upper-level electric vehicle vehicle controller through the CAN bus, sends battery working status information to the vehicle controller, and receives battery control commands issued by the vehicle controller. The master controller and the slave controller communicate through the CAN network. The slave controller can measure battery cell voltage, cell temperature, ambient temperature, and the temperature of the controller itself. All four slave controllers are connected to the CAN network.

[0045] The situation of...

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Abstract

The invention discloses a lithium ion battery management system and a lithium ion battery management system method. The lithium ion battery management system comprises a master controller and one or more than one slave controller, wherein each slave controller is used for acquiring working parameters of each battery in a set of batteries and estimating initial battery SOC (state of charge) according to average voltage of all individual batteries, the main controller is used for acquiring overall working parameters of each battery set and calculating battery SOC by ampere-hour integration according to initial SOC transmitted by the slave controllers combining with battery operating current. The lithium ion battery management system is capable of realizing management and control of vehicular lithium ion batteries, and has the functions of monitoring battery working parameters, estimating battery SOC, controlling connection and disconnection of the batteries, performing battery thermal management, communicating with a full-vehicle controller and the like.

Description

technical field [0001] The invention relates to a lithium ion battery management system and method, in particular to the system management and method of the vehicle lithium ion battery. Background technique [0002] At present, in the promotion and application of electric vehicles, the safety and cost of use of lithium-ion power batteries are important factors. Prolonging the service life of lithium-ion batteries is one of the effective ways to reduce the cost of use. In order to ensure the good performance of the lithium-ion power battery and prolong its life, it is necessary to manage and control the battery reasonably and effectively. [0003] Lithium-ion batteries are often in a state of large current changes under vehicle operating conditions, and the operating current is large, and the battery heat is very serious; the working status of each battery cell in the battery pack is inconsistent; the characteristics of lithium-ion batteries determine that they are not resis...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18
CPCY02T10/70
Inventor 高大威卢青春金振华曹建华宣智渊
Owner TSINGHUA UNIV
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