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Battery management system

A battery management system, power management system technology, applied in secondary batteries, battery circuit devices, circuits, etc., can solve safety problems, battery performance degradation, performance degradation and other problems, to ensure safety, prevent overcharge and overcharge put effect

Inactive Publication Date: 2015-11-18
HEFEI HUAXIN ELECTRIC VEHICLE TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the inherent characteristics of lithium battery materials, it will cause serious performance attenuation and even safety problems during overcharge, overdischarge and overtemperature; if the lithium battery pack is not effectively managed, the performance of the battery pack will rapidly decay, eventually rendering the battery pack unusable

Method used

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  • Battery management system

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Embodiment Construction

[0016] Referring to the accompanying drawings, a battery management system, the system includes a plurality of battery module monitoring units, a main control unit and a balance module, the battery module monitoring unit is used to detect the voltage and temperature of each battery module in the battery module pack Detect, transmit the data to the main control unit after processing, and manage the imbalance in the module; the balance module is used to charge or discharge the battery pack and other battery packs according to the detected working status of the battery , so that the energy of the battery pack is consistent with that of the batteries in other battery packs; several mode selection modules, each mode selection module is used to connect a certain battery in the battery pack to other battery packs for charging or discharging , the number of mode selection modules is the same as the number of batteries in this battery pack; the equalization module includes: a DC / DC conv...

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Abstract

The invention discloses a battery management system which comprises a plurality of battery module monitoring units, a master control unit and an equalization module. The maser control unit performs the functions of receiving data information which is transmitted from the battery module monitoring units, communicating with an electric vehicle whole-vehicle control unit and a charger, detecting a total voltage, a total current and an insulativity, estimating the charge state and health state of the battery according to the acquired battery data, and protecting charging and discharging of the battery. The battery management system realizes battery data acquisition, state estimation, equalization management and charging / discharging protection. The voltage, the current and the battery temperature of a lithium battery are measured. Charging or discharging is controlled according to the current state of the lithium battery, thereby preventing overcharging and over-discharging, and ensuring high safety of the lithium battery and the electric vehicle.

Description

technical field [0001] The invention relates to the technical field of battery management, in particular to a battery management system. Background technique [0002] With the aggravation of environmental pollution and energy crisis, energy-saving and environmentally friendly electric vehicles have become the future development trend of the automotive industry. Lithium batteries have the highest energy density ratio and power density ratio among all secondary batteries, making them the most widely used electric vehicle batteries. Due to the inherent characteristics of lithium battery materials, it will cause serious performance attenuation and even safety problems during overcharge, overdischarge and overtemperature; if the lithium battery pack is not effectively managed, the performance of the battery pack will rapidly decay, eventually rendering the battery pack unusable. According to the characteristics of lithium batteries, effective management of power lithium batteri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/48
CPCY02E60/10
Inventor 査海星张建军韩昌军孙嘉
Owner HEFEI HUAXIN ELECTRIC VEHICLE TECH DEV
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