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Battery insulation detection circuit

A technology of detection circuit and voltage measurement circuit, which is applied in the direction of test circuit, high resistance measurement, resistance/reactance/impedance measurement, etc. It can solve the problems of long detection time, poor precision and high cost, and achieve short detection time and high precision. High and low cost effect

Pending Publication Date: 2020-06-12
RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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Problems solved by technology

[0003] In view of this, an embodiment of the present disclosure provides a battery insulation detection circuit, which at least solves the problems of poor precision, long detection time and high cost in the prior art

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Embodiment Construction

[0029] Preferred embodiments of the present disclosure will be described in more detail below. Although preferred embodiments of the present disclosure are described below, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein.

[0030] Such as figure 1 As shown, a battery insulation detection circuit includes:

[0031] Battery pack voltage acquisition voltage divider circuit, insulation detection voltage acquisition voltage divider circuit, battery pack voltage measurement circuit, insulation detection voltage measurement circuit, measurement data synchronous acquisition circuit, processor, insulation adaptation resistor and measurement switch,

[0032] The battery pack voltage collection voltage divider circuit and the insulation detection voltage collection voltage divider circuit are respectively connected to the battery pack;

[0033] The battery pack voltage measuring circui...

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Abstract

The embodiment of the invention discloses a battery insulation detection circuit, which comprises a battery pack voltage acquisition voltage division circuit, an insulation detection voltage acquisition voltage division circuit, a battery pack voltage measurement circuit, an insulation detection voltage measurement circuit, a measurement data synchronous acquisition circuit, a processor, an insulation adaptive resistor and a measurement switch. Voltage of a battery pack voltage acquisition voltage division circuit and voltage of an insulation detection voltage acquisition voltage division circuit are respectively measured through a battery pack voltage measurement circuit and an insulation detection voltage measurement circuit. The measured voltage value is synchronously transmitted to theprocessor; the processor detects the insulativity of the battery according to the resistance values and the acquired voltage values of the battery pack voltage acquisition voltage division circuit and the insulation detection voltage acquisition voltage division circuit, and the detection result is not influenced by the voltage fluctuation of the battery pack, so that the purposes of high availability, high precision, short detection time and low cost are achieved.

Description

technical field [0001] The disclosure belongs to the technical field of battery detection, and more specifically relates to a battery insulation detection circuit. Background technique [0002] The battery pack, especially the vehicle battery pack, has a high voltage range of 300V-750V. This level of high voltage is enough to endanger personal safety, and it is necessary to avoid the danger of electric shock. As the brain of the battery system, the battery management system must predict risks in advance, so the battery management system can accurately and quickly complete the diagnosis of the insulation resistance of the battery system is a necessary measure to avoid hazards. At present, the insulation detection method of battery packs in the industry generally uses the balanced bridge method recommended by GB / T18384.1-2015. The standard clearly stipulates that a stable voltage should be maintained during the test period. When this method is applied to a battery system in a ...

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Application Information

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IPC IPC(8): G01R31/389G01R31/14G01R27/02
CPCG01R27/025G01R31/14G01R31/389
Inventor 郭长新吴栋宇
Owner RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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