Title:
電源装置
Document Type and Number:
Japanese Patent JP5661414
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To quickly detect disconnection of a voltage detection line with a simple circuit configuration.SOLUTION: A power supply device comprises: a plurality of battery modules 1 connected in series; a voltage detection circuit 2 which is connected to an electrode terminal of each of the battery modules 1 via a voltage detection line 9, and which detects a voltage of each battery module 1 and determines disconnection of the voltage detection line 9 based on the detected voltage; and a short circuit 3 for temporarily short-circuiting an input side of the voltage detection circuit 2. The short circuit 3 comprises: a short-circuit transistor 4 having a collector and an emitter connected to the input side of the voltage detection circuit 2; and a mirror circuit 5 connected to a base of the short-circuit transistor 4. When the voltage detection line 9 is in a non-disconnected state, the mirror circuit 5 cuts off a base current of the short-circuit transistor 4 so as to turn the short-circuit transistor 4 into an off-state, whereas it switches the short-circuit transistor 4 over to an on-state without cutting off the base current of the short-circuit transistor 4 so as to short-circuit the input side of the voltage detection circuit 2 when the voltage detection line 9 is in a disconnected state.
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Inventors:
平原 省吾
中村 豊重
中村 豊重
Application Number:
JP2010230887A
Publication Date:
January 28, 2015
Filing Date:
October 13, 2010
Export Citation:
Assignee:
三洋電機株式会社
International Classes:
H01M10/48; G01R31/02; G01R31/36; H02J7/00; H02J7/02; H02J7/10
Attorney, Agent or Firm:
Yasuhiro Toyosu
Yasushi Toyosu
Yasushi Toyosu