Battery monitoring device and a battery unit

A technology for battery monitoring and control components, which is applied to battery circuit devices, circuit devices, batteries, etc., and can solve problems such as abnormal communication and uncertainty

Inactive Publication Date: 2015-01-21
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem with the condition monitoring unit for multiple assembled batteries described above is that it is not possible to determine on which communication line path, that is, on the forward path (upstream communication line) or on the backward path (downstream communication line), the abnormal communication

Method used

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  • Battery monitoring device and a battery unit
  • Battery monitoring device and a battery unit
  • Battery monitoring device and a battery unit

Examples

Experimental program
Comparison scheme
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no. 1 example

[0035] figure 1 is a diagram showing the battery monitoring device and battery components in the first embodiment.

[0036] Main elements of the battery unit 100 in the first embodiment include an electronic control unit (ECU) 110 and battery stacks 120 and 130 . The battery stacks 120 and 130 each include a plurality of battery cells 150 and an integrated circuit (IC) chip 160 . The battery monitoring device in the first embodiment includes the ECU 110 and the IC chip 160 included in the battery stacks 120 and 130 .

[0037] figure 1 One example of the arrangement of the battery component 100 is schematically shown in plan view. The arrangement of ECU 110 and battery stacks 120 and 130 is not limited to figure 1 The pattern shown in, but may be another pattern arrangement.

[0038] The battery unit 100 is a device used as a power source of a driving device that outputs electric power to drive an electric vehicle. Here, the drive device of the electric vehicle refers to ...

no. 2 example

[0220] Figure 9 is a diagram showing the communication circuit 200 of the battery monitoring device in the second embodiment. The difference between the battery monitoring device in the second embodiment and the battery monitoring device 100A in the first embodiment is that it is used to determine on which signal line, that is, on the forward path signal line 170A or the backward path signal line 170B The method for determining a disconnected connection. Since other configurations are similar to those of the battery monitoring device 100A (see FIG. 2 ) in the first embodiment, the same reference numerals are given to the same elements and detailed descriptions are omitted.

[0221] The communication circuit 200 is inserted between the signal lines 170A and 170B between IC1 and IC2 shown in FIG. 2 . Communication circuit 200 is also inserted between IC2 and IC3 and between IC3 and IC4 between signal lines 170A and 170B. Both the signal lines 170A and 170B are used to transm...

no. 3 example

[0240] FIG. 10 is a diagram showing a battery monitoring device 300A in the third embodiment. Figure 10A A battery monitoring device 300A in the third embodiment shown in has a configuration similar to that of the battery monitoring device 100A in the first embodiment except that the stack voltage detection circuit 113 is removed from the battery monitoring device 100A and the capacitor 311 is added to ECU310. Since other configurations are similar to those of the battery monitoring device 100A in the first embodiment, the same reference numerals are given to the same elements and detailed descriptions are omitted.

[0241] ECU 310 includes microcomputer 111 , isolator 112 and capacitor 311 . One end of the capacitor 311 is connected to the point where the forward path signal line 170A turns around at IC4 through the signal line 320 , and the other end is connected to the microcomputer 111 . That is, the signal line 320 connects the ECU 310 to the IC 4 which is the farthest...

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PUM

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Abstract

A battery monitoring device includes a first unit arranged outside a plurality of stacks each of which includes cells; a plurality of second units arranged in each of the stacks to output voltage data of the cells; a signal line that connects the second units and the first unit in a daisy chain mode; and a detection unit that detects a stack voltage wherein the first unit determines that a disconnection is generated on the signal line when a response is not received from the plurality of second units via the signal line after sending data is sent to the plurality of second units via the signal line and, determines on which path of the signal line, a forward path or a backward path, the disconnection is generated based on a difference between the stack voltage and a total of all detected output voltages sent from the second units.

Description

technical field [0001] The present invention relates to battery monitoring devices and battery components. Background technique [0002] Devices have been developed that monitor the status of multiple assembled batteries using multiple integrated circuits (ICs) interconnected by signal lines. For example, a main microcomputer arranged in a circuit whose voltage is lower than that of the assembled battery outputs a voltage detection command. In response to this command, the first to fifth voltage monitoring ICs arranged in the assembled battery transmit the measured voltage data on the corresponding battery cells to the main microcomputer for monitoring the states of a plurality of assembled batteries (for example, see Japanese Patent Application Publication No. 2011-050176 (JP2011-050176A)). [0003] The main microcomputer checks whether the number of received digital voltage signals of the battery cells is equal to the number of the first to fifth voltage monitoring ICs o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/48H01M10/44
CPCH01M10/48G01R31/3627H01M2220/20G01R31/396G01R31/3835G01R31/3842Y02E60/10G01R31/385
Inventor 西胁典男
Owner TOYOTA JIDOSHA KK
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