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Battery monitoring device and battery monitoring system

A battery monitoring and circuit technology, applied in battery circuit devices, circuit devices, battery/fuel cell control devices, etc., to achieve the effect of reducing current consumption and power consumption

Inactive Publication Date: 2015-03-25
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the current consumption cannot be reduced to 0μA in standby mode

Method used

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  • Battery monitoring device and battery monitoring system
  • Battery monitoring device and battery monitoring system
  • Battery monitoring device and battery monitoring system

Examples

Experimental program
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Effect test

no. 1 Embodiment approach

[0028] figure 1 It is a block diagram showing an application example of the battery monitoring system according to the first embodiment. The battery monitoring system 4 includes an MCU (Micro Control Unit, Micro Control Unit) 11 , a battery 2 , and a battery monitoring device 1 that monitors the battery 2 . The battery monitoring system 4 monitors the voltage or current of the battery 2 to be monitored. The battery 2 is, for example, a lithium ion battery in which a plurality of battery cells are connected in series. The battery monitoring device 1 includes a battery monitoring circuit 101 and a battery monitoring IC 10 .

[0029] The battery monitoring IC 10 measures the voltage of each battery cell of the battery 2 and collects the measured values. The battery monitoring IC 10 is supplied with a clock signal CK and commands or data DI from the MCU 11 via the battery monitoring circuit 101 , and sends the measured data output DO as the voltage of each cell to the MCU 11 . ...

no. 2 Embodiment approach

[0049] Figure 4 It is a diagram showing the configuration of the battery monitoring circuit 102 used in the battery monitoring system according to the second embodiment.

[0050] The battery monitoring circuit 102 is a circuit in which capacitive coupling is changed between the MCU 11 and the clock input terminal 12 , data input terminal 13 , and data output terminal 14 using the capacitor 23 , and the other configurations are the same as those of the first embodiment. Thus, in Figure 4 In pair with figure 1 The same constituent elements are given the same reference numerals and redundant descriptions are omitted.

[0051] According to the battery monitoring circuit 102 thus capacitively coupled, a plurality of battery monitoring ICs 10 according to the first embodiment can be connected in series to monitor a plurality of batteries connected in series.

[0052] Figure 5 It is a block diagram showing an example of a battery monitoring system 3 that monitors a plurality o...

no. 3 Embodiment approach

[0058] Figure 6 It is a diagram showing a schematic configuration of the battery monitoring circuit 103 used in the battery monitoring system according to the third embodiment. exist Figure 6 in, right with figure 1 or Figure 4 The same constituent elements are given the same reference numerals and redundant descriptions are omitted.

[0059] In the third embodiment, a differential communication method is adopted, and a positive-phase clock signal CLK, an inverted NCLK which is an inverted signal thereof, a normal-phase data signal DAT, and an inverted data signal NDAT which is an inverted signal thereof are input to the battery monitoring circuit 103 . In addition, although the normal phase clock signal CLK and the normal phase data signal DAT are substantially the same signals as the clock signal CK and the data signal DI in the first and second embodiments, respectively, different symbols are used for description here.

[0060] A set of clock signals CLK and NCLK is...

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Abstract

The present invention discloses a battery monitoring device and a battery monitoring system for reducing a standby current in a standby mode to zero. The battery monitoring system includes a processor (11), a battery monitoring device (1-1) connected with the processor and a plurality of battery monitoring devices (1-2~1-N), and a plurality of batteries (2-1~2-N) disposed in parallel with the plural battery monitoring devices (1-1~1-N). The battery monitoring device (1-1) includes a clock input terminal, a data input terminal, a communication control circuit receiving the clock signal and the data signal from the clock input terminal and the data input terminal, respectively, a main power regulator controlled by the communication control circuit to supply and stop supplying main power, a charge circuit charged by the clock signal, and a sub power regulator started by a charge voltage of the charge circuit to supply a sub power to the communication control circuit. The communication control circuit controls the main power regulator with the data signal when the sub power is received from the sub power regulator.

Description

[0001] Cross References to Related Art [0002] This application claims priority based on Japanese Patent Application No. 2013-191779 for which it applied on September 17, 2013, and uses all the content of this Japanese Patent Application for this application. technical field [0003] This embodiment relates to a battery monitoring device and a battery monitoring system, and in particular, relates to a battery monitoring device and a battery monitoring system having a semiconductor integrated circuit in a standby mode. Background technique [0004] Vehicles are equipped with various semiconductor integrated circuits (hereinafter referred to as "IC"), for example, there is a battery monitoring IC for monitoring a battery. The battery monitoring IC monitors the respective voltages of a plurality of battery cells connected in series. Battery monitoring ICs prevent overcharging / overdischarging, or predict remaining battery life. The battery monitoring IC is provided with a mai...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J2007/0067H02J7/0047H02J7/0063H02J7/0048H02J2207/10B60L2240/80B60L2260/44B60L58/10H02J7/00Y02T10/70Y02T90/16Y02T10/92
Inventor 森川雅昭
Owner KK TOSHIBA
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