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Cell-monitoring device

A battery monitoring and battery technology, applied to battery circuit devices, circuit devices, batteries, etc., can solve problems such as abnormal communication, failure to cut off, failure to send and receive status information, etc.

Active Publication Date: 2016-11-23
TOYOTA IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned battery monitoring device, there is a problem that if a communication abnormality occurs between the monitoring unit and the control unit, status information or a power cutoff request cannot be sent and received, or if an abnormality occurs in the monitoring unit, it is impossible to transfer the power from the battery to the control unit. The power supply to the load is cut off

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] figure 1 It is a figure which shows an example of a battery pack.

[0018] figure 1 The illustrated battery pack 1 is mounted on, for example, a vehicle (for example, an electric forklift, a hybrid vehicle, or an electric vehicle), and includes a battery module 2 and a control ECU (Electronic Control Unit: Electronic Control Unit) 3 .

[0019] The battery module 2 includes a battery 21 , a disconnection unit 22 (first disconnection unit), a monitoring ECU 23 , a voltage detection unit 24 , a current detection unit 25 , and a temperature detection unit 26 .

[0020] The battery 21 is configured by including seven batteries (for example, lithium-ion secondary batteries, nickel-metal hydride batteries, etc.) connected in series. In addition, the number of batteries constituting the battery 21 is not limited to seven.

[0021] The cutting unit 22 includes N-channel MOSFETs (Metal Oxide Semiconductor Field Effect Transistor: Metal Oxide Semiconductor Field Effect Transist...

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Abstract

A cell-monitoring device is configured by being provided with a monitoring unit (233) for sending status information that shows the status of a cell (21) and causing a shut-off unit (22) to shut off electric power supply to a load from the cell (21) when an electric power-shut off request is received or when electric power supply to the load (4) is shut off, and a control unit (33) for sending an electric power-shut off request to the monitoring unit (233) when it is determined that an abnormality has occurred in the cell (21) on the basis of the status information sent from the monitoring unit (233). The control unit (33) causes a shut off unit (32) to shut off the supply of electric power to the monitoring unit (233) when it is determined that a communication abnormality has occurred between the monitoring unit (233) and the control unit (33) or that an abnormality has occurred at the monitoring unit (233).

Description

technical field [0001] The present invention relates to a battery monitoring device for monitoring the state of a battery. Background technique [0002] As a battery monitoring device, there is a device that monitors the state (overcharge, overdischarge, etc.) of a battery used in a vehicle as disclosed in Patent Document 1, for example. [0003] In addition, as a battery monitoring device, for example, if the control unit determines that an abnormality has occurred in the battery based on the state information indicating the battery state sent from the monitoring unit, the control unit sends a power cutoff request to the monitoring unit to cut off the power supply from the battery to the load. battery monitoring device for the power supply. [0004] Patent Document 1: Japanese Patent Laid-Open No. 2013-102657 [0005] However, in the above-mentioned battery monitoring device, there is a problem that if a communication abnormality occurs between the monitoring unit and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00G01R31/36H01M10/42H01M10/48H01M50/574
CPCH01M2010/4278H01M2200/00H02J7/0031G01R35/00G01R31/3842G01R31/371H01M10/482H02J2310/48Y02T10/70Y02E60/10H02J7/0048H02J7/0013H01M50/574G01R31/36H01M10/425
Inventor 长谷隆介都竹隆广山本悟士加藤洋明
Owner TOYOTA IND CORP
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