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Battery monitoring system and semiconductor device

A battery monitoring and semiconductor technology, applied in secondary batteries, circuits, electric traction, etc., can solve problems such as current waste and achieve the effect of suppressing current consumption

Active Publication Date: 2016-12-28
LAPIS SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Therefore, in this case, there is a problem that the current for operating the communication level conversion unit of the highest-level battery monitoring IC and the upper-level communication unit is wasted.

Method used

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  • Battery monitoring system and semiconductor device
  • Battery monitoring system and semiconductor device
  • Battery monitoring system and semiconductor device

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Embodiment Construction

[0031] Hereinafter, a battery monitoring system and a battery monitoring semiconductor device (battery monitoring IC) according to the present embodiment will be described with reference to the drawings.

[0032] First, the overall configuration of the battery monitoring system according to the present embodiment will be described briefly. figure 1 An example of the schematic configuration of the battery monitoring system of this embodiment is shown. However, in this embodiment, as a specific example, the battery monitoring system 10 which monitors the battery voltage of the battery cell group 12 in which a plurality of lithium ion batteries are connected in series as a secondary battery will be described.

[0033] The battery monitoring system 10 of the present embodiment includes n battery cell groups 12 ( 121 to 12n ), battery monitoring ICs (Integrated Circuit: integrated circuit) 20 (IC1 to ICn) for monitoring the voltage of each battery cell group 12 , and The control u...

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Abstract

The present invention provides a battery monitoring system capable of suppressing integral current consumption of the battery monitoring system and a semiconductor device. In battery monitoring (IC20(IC2)), VCC1(IC2)=VCC2(IC2), an upper communication part (28) and a communication level switching part (26) are not driven. Current consumption consumed by the communication level switching part (26) and the upper communication part (28) can be suppressed, thus integral current consumption of the battery monitoring system (10) can be suppressed. A signal inputted from the upper communication part (28) to the communication level switching part (26) is indefinite, a power supply voltage monitoring circuit (30) detects that VCC1(IC2)=VCC2(IC2), and outputs a detected signal (INV signal) to an HV-LV switching part (26HL) of the communication level switching part (26). In the HV-LV switching part (26HL), an input voltage of an inverter INV3 is fixed to a specified level (0V) through the INV signal, thereby quickly suppressing a shoot-through current.

Description

technical field [0001] The present invention relates to a battery monitoring system and a semiconductor device. Background technique [0002] As a large-capacity, high-output battery used for motor driving of hybrid vehicles and electric vehicles, etc., a storage battery in which a plurality of batteries (battery cells) are connected in series is generally used. As such a battery cell, for example, a lithium ion secondary battery is used. [0003] Since such a battery cell has a high energy density, when an internal short circuit or the like occurs due to some problem, the energy may be released at once. In order to avoid this situation, the battery voltage of the battery cells is monitored by a battery monitoring system so as not to fall into an abnormal state such as an overcharged state or an overdischarged state. As such a battery monitoring system, technologies described in Patent Document 1, Patent Document 2, and Patent Document 3 are disclosed, for example. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L11/18H01M10/48
CPCY02E60/10
Inventor 关口胜
Owner LAPIS SEMICON CO LTD
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