Active balanced battery management system and application of active balanced battery management system to electric vehicle
A battery management system, active balancing technology, applied in electric vehicles, battery/fuel cell control devices, vehicle energy storage, etc. low heat effect
Inactive Publication Date: 2019-08-02
YANSHAN UNIV
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Problems solved by technology
But at present, active equalization needs to work with a DC / DC converter, which not only increases the volume, but also costs a lot
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[0030] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0031] The invention describes an active balancing battery management system, which includes a battery pack and a converter; it also includes a switch group and a polarity switch; the switch group is composed of a plurality of bidirectional switches and has two common terminals; the battery One electrode of each battery in the group is connected to a bidirectional switch of the switch group and then connected to a common end of the switch group, and the other electrode is connected to a bidirectional switch of the switch group and then connected to the other common end of the connection switch group; The polarity switch has two left common terminals and two right common terminals, and each left common terminal is respectively connected to two right common terminals, and a A bidirectional switch; one common end of the switch group is connecte...
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The invention discloses an active balanced battery management system, and belongs to the field of battery management systems. The active balanced battery management system includes a battery pack anda converter, and further includes a switch group and a polarity switch; the switch group is composed of a plurality of two-way switches, the switch group is provided with two common ends, the polarityswitch is provided with two left-side common ends and two right-side common ends, and four two-way switches are arranged between the left-side common ends and the right-side common ends; and one of the common ends of the switch group is connected with one of the left-side common ends of the polarity switch, and the other one of the common ends is connected with the other one of the left-side common ends of the polarity switch, the right-side common ends of the polarity switch are connected with the low-voltage end of the converter, and the high-voltage end of the converter is connected with the battery pack. The active balanced electric vehicle power battery management system can monitor, balance and protect the battery pack safely and efficiently, and has the advantages of low energy loss, low calorific value, simple circuit and easy control, high reliability and the like.
Description
technical field [0001] The invention belongs to the field of battery management systems for electric vehicles, and in particular relates to an active balancing battery management system and its application in electric vehicles. Background technique [0002] With the vigorous promotion and application of electric vehicles, there are increasingly higher requirements for the battery life of electric vehicles. Since there will be differences in the manufacturing process of lithium batteries, and the differences will become larger and larger as the use time increases, and the cruising range of electric vehicles has a direct relationship with the current state of the battery, so it is necessary to use a battery management system Manage the battery pack of electric vehicles, monitor the voltage, current, temperature, SOC and health status of the battery pack in real time, make different treatments for different situations, protect the battery pack from damage, prevent safety accide...
Claims
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IPC IPC(8): B60L58/22
CPCB60L58/22Y02T10/70
Inventor 荣亚君刘超李聪冯海潮藏怀泉
Owner YANSHAN UNIV