Power battery management system of electric car

A battery management system and management system technology, applied in the field of electric vehicle power battery management system, can solve problems such as difficulty in guaranteeing functional safety, difficult effective management of charge and discharge, and inability to use, etc., to achieve the effect of guaranteed functional safety

Active Publication Date: 2016-06-29
HIGER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned management system will lose its function due to a single point of failure, and it is difficult to guarantee the functional safety. Moreover, if a part of the battery manag...

Method used

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  • Power battery management system of electric car

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Embodiment Construction

[0019] Such as figure 1 As shown, a power battery management system includes a power battery pack, a total battery management system CBMS, an insulation detection circuit, a total current detection circuit, a total voltage detection circuit, a protection circuit, a temperature management circuit, several sub-battery management systems SBMS, a single Body voltage detection circuit, temperature detection circuit, equalization circuit and CAN communication circuit. in:

[0020] The total battery management system CBMS is connected with the insulation detection circuit, the total current detection circuit, the total voltage detection circuit, the protection circuit, and the temperature management circuit, and the sub-battery management system is connected with the single voltage detection circuit, temperature detection circuit, and equalization circuit. The total battery management system and sub-battery management systems exchange data through CAN communication.

[0021] The in...

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Abstract

The invention discloses a power battery management system of an electric car.The power battery management system comprises a power battery pack, a center power management system (CBMS) and a plurality of sub battery management systems (SBMSs).The sub battery management systems (SBMSs) comprise unit voltage detecting circuits, temperature detecting circuits and balance circuits connected with battery cells respectively.The sub battery management systems (SBMSs) exchange information through CAN communication circuits, and the information is reported to the center power management system (CBMS) through the CAN communication circuits.The power battery pack is connected with a main current detecting circuit, a main voltage detecting circuit and an insulation detecting circuit.Each battery cell is provided with one independent sub battery management system (SBMS), the whole battery system is provided with the center power management system (CBMS), one CBMS and an arbitrary number of random SBMSs form one battery management system, the CBMS can automatically adapt to the new battery number, capacity, battery states and the like by increasing or reducing or replacing the SBMSs, and unique advantages are achieved on a battery system in an alternating current mode.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an electric vehicle power battery management system. Background technique [0002] With its many advantages, such as high energy density, high voltage platform, and no heavy metal pollutants, lithium-ion batteries have become the main force of mobile power and power batteries. However, lithium-ion batteries are also quite delicate, and their chemical characteristics determine that their operating voltage has strict upper and lower limits, and the charging and discharging power characteristics have a great correlation with temperature and state of charge. When applied to electric vehicles, various overcharge and overdischarge, overheating, collision extrusion, puncture, etc. will not only lead to rapid damage to the battery, but may also cause safety accidents. Therefore, it is necessary to develop a good battery management system to protect the battery. indispensable. ...

Claims

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Application Information

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IPC IPC(8): B60L11/18
CPCB60L58/10B60L58/21Y02T10/70Y02T90/16
Inventor 王世强孙翼峰羌嘉曦张卫林邱远红
Owner HIGER
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