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Storage battery monitoring device

A technology for monitoring devices and storage batteries, which is applied to battery circuit devices, circuit devices, and measuring devices. The effect of power loss

Active Publication Date: 2016-06-29
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the management method of the above-mentioned battery pack, when a poor connection occurs between the battery cell and the voltage measurement circuit due to a disconnection of the voltage detection line, etc., the voltage of the battery cell cannot be accurately measured, so the battery cannot be managed correctly. Group

Method used

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Examples

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Embodiment Construction

[0033] Hereinafter, one embodiment of the present invention will be described based on the drawings.

[0034] figure 1 It is a figure which shows the structure of the battery monitoring apparatus 100 which concerns on one Embodiment of this invention. The battery monitoring device 100 is connected to the battery pack 200 via voltage detection lines 211 , 212 , and 213 .

[0035] The battery pack 200 has battery cells 201 and 202 . The battery cells 201 and 202 are storage batteries each using a secondary battery such as a lithium ion battery, and are discharged by supplying electric power to a load not shown. In addition, the battery cells 201 and 202 can be charged using electric power supplied from a charging device not shown in the figure.

[0036] The voltage detection line 211 is connected to the positive pole of the battery cell 201 , the voltage detection line 212 is connected to the negative pole of the battery cell 201 and the positive pole of the battery cell 202 ...

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PUM

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Abstract

This storage battery monitoring device is provided with: a pair of measurement lines respectively connected to a pair of voltage detection lines which are respectively connected to the positive pole and the negative pole of a storage battery; a pair of regulating lines respectively connected to the pair of voltage detection lines, in parallel to the measurement lines; a first capacitor element connected between the pair of measurement lines; a second capacitor element connected between the pair of regulating lines; and a switch connected between either end of the second capacitor element. Capacitance values are established for the first capacitor element and the second capacitor element such that, in the event of a disconnection on a voltage detection line, subsequent to opening of the switch after being closed for a prescribed short circuiting time, the voltage across the pair of measurement lines continues to vary.

Description

technical field [0001] The present invention relates to a storage battery monitoring device. Background technique [0002] Conventionally, for the purpose of improving handleability and simplifying the structure, a plurality of battery cells using secondary batteries are connected in series to form a battery pack. It is known that in such a battery pack, when each battery cell uses a lithium ion battery, a voltage detection line is connected to each battery cell to measure the voltage, and based on the measurement result, the state of each battery cell is detected, and the battery pack is performed. method of management. [0003] In the management method of the above-mentioned battery pack, when a poor connection occurs between the battery cell and the voltage measurement circuit due to a disconnection of the voltage detection line, etc., the voltage of the battery cell cannot be accurately measured, so the battery cannot be managed correctly. Group. Then, as a means to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36H02J7/00G01R31/58
CPCG01R35/00G01R19/16542G01R31/396G01R31/3835G01R31/54G01R31/52G01R31/58H02J7/0013H02J7/0029Y02E60/10
Inventor 加藤伸哉町田明广
Owner HITACHI ASTEMO LTD
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