Monitoring apparatus

Patent metadata

Field	Value
Publication number	US-2019391209-A1
Application number	US-201916439998-A
Country	US
Kind code	A1
Filing date	Jun 13, 2019
Priority date	Jun 20, 2018
Publication date	Dec 26, 2019
Grant date	—

Abstract

A monitoring apparatus includes: a monitoring portion that monitors a voltage of each of battery cells connected in series, each of the battery cells having an electrode terminal; and a wiring portion that connects the monitoring portion and the electrode terminal. The wiring portion includes a first flexible substrate and a second substrate that have flexibility and are integrally linked with each other. A linking part where the first flexible substrate and the second flexible substrate are linked is bent. The first flexible substrate is connected with the electrode terminal. The second flexible substrate is connected with the monitoring portion. One of the first flexible substrate and the second flexible substrate includes an arm. Another of the first flexible substrate and the second flexible substrate other than the one including the arm includes a slit. The arm is fixed to the slit, causing the linking part to be reinforced.

First claim

What is claimed is:

1 . A monitoring apparatus comprising:
a monitoring portion configured to monitor a voltage of each of a plurality of battery cells connected in series, each of the battery cells having an electrode terminal; and a wiring portion that electrically connects the monitoring portion and the electrode terminal of the battery cell, wherein: the wiring portion includes a first flexible substrate and a second substrate that have flexibility and are integrally linked with each other; a linking part where the first flexible substrate and the second flexible substrate are linked is bent; the first flexible substrate is connected with the electrode terminal; the second flexible substrate is connected with the monitoring portion; one of the first flexible substrate and the second flexible substrate includes an arm; another of the first flexible substrate and the second flexible substrate other than the one including the arm includes a slit; and the arm is fixed to the slit, causing the linking part to be reinforced.

2 . The monitoring apparatus according to claim 1 , wherein:
the second flexible substrate includes the arm; and the first flexible substrate includes the slit.

3 . The monitoring apparatus according to claim 1 , further comprising:
a substrate including the first flexible substrate and the second flexible substrate, the substrate having flexibility; and a wiring pattern provided on the substrate, wherein: the arm includes a reinforcement material with rigid than a formation material of the substrate.

4 . The monitoring apparatus according to claim 1 , wherein:
the battery cells are aligned in a first direction; each of the battery cells includes a formation surface; the electrode terminal of each of the battery cells includes a positive electrode terminal and a negative electrode terminal, the positive electrode terminal and the negative electrode terminal being aligned in a second direction crossing the first direction; the positive electrode terminal of a first cell of the battery cells and the negative electrode terminal of a second cell of the battery cells are alternately aligned in the first direction, which configures
a first electrode terminal group in which the positive electrode terminal and the negative electrode terminal are alternately aligned, and
a second electrode terminal group in which the positive electrode terminal and the negative electrode terminal are alternately aligned in a reversed order of the first electrode terminal group;
the electrode terminal is provided on the formation surface; the first flexible substrate faces the formation surface; the first flexible substrate is placed between the first electrode terminal group and the second electrode terminal group; and the monitoring portion and the second flexible substrate are placed on a side surface of a battery cell which is positioned at an end of the battery cells aligned in the first direction.

5 . The monitoring apparatus according to claim 1 , wherein:
the battery cells are aligned in a first direction; each of the battery cells includes a formation surface; the electrode terminal of each of the battery cells includes a positive electrode terminal and a negative electrode terminal, the positive electrode terminal and the negative electrode terminal being aligned in a second direction crossing the first direction; the positive electrode terminal of a first cell of the battery cells and the negative electrode terminal of a second cell of the battery cells are alternately aligned in the first direction, which configures
a first electrode terminal group in which the positive electrode terminal and the negative electrode terminal are alternately aligned, and
a second electrode terminal group in which the positive electrode terminal and the negative electrode terminal are alternately aligned in a reversed order of the first electrode terminal group;
the second flexible substrate is bent; the electrode terminal is provided on the formation surface; and the first flexible substrate, the second flexible substrate, and the monitoring portion are placed between the first electrode terminal group and the second electrode terminal group, and are overlapped with each other on the formation surface.

6 . The monitoring apparatus according to claim 1 , wherein:
the monitoring portion includes a wiring substrate connected with the second substrate; and the monitoring portion further includes a monitoring IC chip placed on the wiring substrate.

7 . A monitoring apparatus comprising:
a plurality of series terminals that connects a positive electrode terminal of a first cell and a negative electrode terminal of a second cell, the first cell and the second cell being included in at least three battery cells that are aligned in a first direction and being placed adjacent to each other; a wiring portion that includes a wiring pattern connected with the series terminals; and a monitoring portion configured to monitor a voltage of each of the battery cells input through the wiring pattern, wherein: each of the series terminals includes
a link portion extending in the first direction to be connected with the positive electrode terminal and the negative electrode terminal, and
a connection portion extending from a middle point between a first connection point where the positive electrode terminal is connected with the link portion and a second connection portion where the negative electrode terminal is connected with the link portion; and
the wiring pattern of the wiring portion is connected with the connection portion.

8 . The monitoring apparatus according to claim 7 , wherein:
each of the battery cells includes a formation surface; the positive electrode terminal and the negative electrode terminal are provided on the formation surface; the connection portion includes
a reference portion extending from the middle point in the link portion in a second direction crossing the first direction on the formation surface, and
a compensation portion extending from an end of the reference portion in the first direction; and
the wiring pattern is connected with the compensation portion.

9 . The monitoring apparatus according to claim 8 , wherein:
the monitoring portion includes a voltage detection circuit configured to detect a voltage of each of the series terminals; the wiring pattern is connected with an input terminal of the voltage detection circuit; and an input impedance of the voltage detection circuit is higher than an output impedance of the voltage detection circuit.

10 . The monitoring apparatus according to claim 8 , wherein:
each of the battery cells includes the positive electrode terminal and the negative electrode terminal; the positive electrode terminal and the negative electrode terminal provided on the formation surface of each of the battery cells are aligned in the lateral direction; the positive electrode terminal of the first cell of the battery cells and the negative electrode terminal of the second cell of the battery cells are alternately aligned in the first direction, which configures
a first electrode terminal group in which the positive electrode terminal and the negative electrode terminal are alternately aligned, and
a second electrode terminal group in which the positive electrode terminal and the negative electrode terminal are alternately aligned in a reversed order of the first electrode terminal group;
the wiring portion includes a flexible substrate on which the wiring pattern is placed; the wiring portion is placed between the first electrode terminal group and the second electrode terminal

Assignees

• Denso Corp

Inventors

• Kouda Masakazu
• Kawamoto Shinsuke
• Mizoguchi Hayato
• Yamakawa Ryo

Classifications

• B60L3/12

  Recording operating variables {; Monitoring of operating variables} · CPC title

• B60L2240/547

  Voltage · CPC title

• B60L50/64

  Constructional details of batteries specially adapted for electric vehicles · CPC title

• B60L58/12 Primary

  responding to state of charge [SoC] · CPC title

• G01R31/396

  Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery · CPC title