Diagnosis and control method for power battery management system

A battery management system and diagnostic control technology, applied in battery circuit devices, secondary battery repair/maintenance, measurement of electricity, etc., can solve problems such as the inability to guarantee system effectiveness and safety, and the imperfect diagnostic function of the management system, etc. Achieving high safety and efficacy

Active Publication Date: 2012-01-25
奇瑞新能源汽车股份有限公司
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Problems solved by technology

[0002] As an emerging industry, power batteries have broad application prospects. Its wide application is inseparable from reliable, safe, and advanced management technologies. Since the current penetration rate of electric vehicles is not very high, with the increasing demand for environmental protection , electric vehicles have broad market prospects, and power battery management technology, as a core technology, is not only widely used in hybrid vehicles and pure electric vehicles, but also has great market potential in other power battery industries. The diagnostic function of the system is not very perfect, and the effectiveness and safety of the system cannot be guaranteed

Method used

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  • Diagnosis and control method for power battery management system

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Embodiment Construction

[0030] The present invention will be described in detail below according to the accompanying drawings, which is a preferred embodiment among various implementations of the present invention.

[0031] The diagnostic strategies of the power battery management system involved in this embodiment are mainly divided into two categories: one is the related diagnosis of the battery management system itself, and the other is the diagnosis for the state of the power battery.

[0032] [1] Security

[0033] The system monitors the voltage and temperature of each battery in the battery pack, and at the same time monitors the reliability of the battery pack's current, voltage, internal resistance, leakage, water immersion, collision and the connection between the single cells. monitor. Electric vehicles generally have potential dangers of current or voltage. Under normal operating conditions, safe high-voltage electrical isolation can be obtained using physical isolation measures such as ...

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Abstract

The invention relates to a diagnosis and control method for a power battery management system (BMS). The BMS performs self-diagnosis and self-control, namely diagnosis and processing for own faults; and the BMS performs diagnosis and control on a power battery, namely diagnosis for the safety of the battery, diagnosis for a voltage sampling fault, diagnosis for a current sensor or circuit damage, diagnosis for a temperature sampling fault, diagnosis for a controller area network (CAN) communication fault, processing for startup sequence, diagnosis for a contactor fault and diagnosis and processing for battery state information.

Description

technical field [0001] The present invention relates to a power battery management system (BMS), especially related diagnosis work of power battery management systems such as pure electric vehicles, hybrid vehicles, and plug-in hybrid vehicles, and specifically relates to a diagnosis control of a power battery management system method. Background technique [0002] As an emerging industry, power batteries have broad application prospects. Its wide application is inseparable from reliable, safe, and advanced management technologies. Since the current penetration rate of electric vehicles is not very high, with the increasing demand for environmental protection , electric vehicles have broad market prospects, and power battery management technology, as a core technology, is not only widely used in hybrid vehicles and pure electric vehicles, but also has great market potential in other power battery industries. The diagnostic function of the system is not very perfect, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36H01M10/42H02J7/00
CPCY02E60/12Y02E60/10
Inventor 许莉
Owner 奇瑞新能源汽车股份有限公司
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