Power supply management device of electric automobile

Abstract

The present invention provides a power supply management device for managing the power supply section of an electric automobile having a plurality of modules accurately and easily. In the power supply management device (30) for an electric automobile, module state detection means (12A-12L) for detecting the voltage and the temperature of each module are mounted, respectively, on modules (5A-5L) constituted by collecting a plurality of battery cells constituting the power supply section (5) of a motor (2), and a control means (10) judges the state of each module based on the information detected by each module state detection means. Each module state detection means is connected in series through a numbering communication line (21), imparts an identification number to itself based on ID information transmitted from a module state detection means in the upstream of connection, and transmits ID information including that identification number to a module state detection means in the downstream of connection. The control means is connected with each module state detection means through the numbering communication line and a communication line (22), and specifies abnormality of each module based on the detection information transmitted through the numbering communication line and the communication line.

Description

technical field [0001] The present invention relates to a power supply management device of an electric vehicle including a power supply unit provided with a plurality of modules. Background technique [0002] In an electric vehicle, a motor serving as a driving source and a battery serving as a power source thereof are mounted in a vehicle body. In an electric vehicle, since the performance and capacity of the battery affect the driving distance, multiple rechargeable batteries are usually loaded. However, batteries for electric vehicles rapidly deteriorate in life performance due to repeated charging and discharging, and the temperature environment is also a major cause of degradation. The progress is also different, which makes it difficult to judge which battery has deteriorated to what extent. Therefore, in Japanese Patent Application Laid-Open No. 7-311248, at the time of maintenance or the like, a detection line is connected to a terminal of each battery, and a batt...

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Problems solved by technology

[0003] According to the description of Patent Document 1, when performing work, the operator uses a clip (clip) or the like to attach a measuring line for voltage detection to the terminal of the battery, connect it to the detection circuit, and designate the battery that has deteriorated based on the detected voltage. battery, however, this must be detected one by one by the operator, so it is very cumbersome

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