Power storage device manufacturing method, manufacturing device, liquid injection device, and liquid injection method

Patent metadata

Field	Value
Publication number	US-2016344014-A1
Application number	US-201515112888-A
Country	US
Kind code	A1
Filing date	Jan 22, 2015
Priority date	Jan 23, 2014
Publication date	Nov 24, 2016
Grant date	—

Abstract

A power storage device manufacturing method that seals a case housing an electrode assembly of a power storage device and injects an electrolyte into the case after sealing, the method includes a step accompanied by a pressure operation of increasing or reducing a pressure inside the case after sealing the case, and a process performed in a state of turning the inside of the case to the pressure higher or lower than an atmospheric pressure, and an internal space capacity of the case is measured based on a change with time of the pressure inside the case caused by the pressure operation inside the case.

First claim

1 . A power storage device manufacturing method that seals a case housing an electrode assembly of a power storage device and injects an electrolyte into the case after sealing, the method comprising:
a step accompanied by a pressure operation of increasing or reducing a pressure inside the case after sealing the case, and a process performed in a state of turning the inside of the case to the pressure higher or lower than an atmospheric pressure, wherein an internal space capacity of the case is measured based on a change with time of the pressure inside the case caused by the pressure operation inside the case.

2 . The power storage device manufacturing method according to claim 1 , wherein the step accompanied by the pressure operation inside the case is an airtightness inspecting step for the case.

3 . The power storage device manufacturing method according to claim 1 , wherein the step accompanied by the pressure operation inside the case is an electrolyte injecting step.

4 . A power storage device manufacturing device comprising:
a chamber configured to house a power storage device; a gas supply source configured to supply a gas into a case of the power storage device; a gas detector configured to detect the gas inside the chamber; a suction machine configured to suck the gas from inside of the case; a flow rate adjuster configured to fix a flow rate of the gas supplied by the gas supply source or a flow rate of the gas sucked by the suction machine; a pressure gauge configured to measure an air pressure inside the case; and a computing unit configured to compute an internal space capacity of the case, based on the air pressure measured by the pressure gauge.

5 . The power storage device manufacturing device according to claim 4 , the device comprising:
a timing unit configured to measure elapsed time when the gas is supplied or sucked, wherein the flow rate adjuster fixes the flow rate of the gas supplied by the gas supply source, and the computing unit computes the internal space capacity of the case, based on a plurality of air pressures measured by the pressure gauge while the gas supply source supplies the gas into the case and the elapsed time between the air pressures.

6 . The power storage device manufacturing device according to claim 4 , the device comprising:
a timing unit configured to measure elapsed time when the gas is supplied or sucked, wherein the flow rate adjuster fixes the flow rate of the gas sucked by the suction machine, and the computing unit computes the internal space capacity of the case, based on a plurality of air pressures measured by the pressure gauge while the suction machine sucks the gas from the inside of the case and the elapsed time between the air pressures.

7 . The power storage device manufacturing device according to claim 4 , further comprising a valve configured to switch and connects the gas supply source and the suction machine to the case.

8 . A power storage device liquid injection device comprising:
a measuring unit configured to measure a cavity volume inside a case housing an electrode assembly of a power storage device by reducing a pressure inside the case; and a liquid injecting unit configured to inject, into the case, an electrolyte in an amount based on the cavity volume measured by the measuring unit.

9 . A power storage device liquid injection method comprising:
a measuring step of measuring a cavity volume inside a case housing an electrode assembly of a power storage device by reducing a pressure inside the case; and a liquid injecting step of injecting, into the case, an electrolyte in an amount based on the cavity volume measured by the measuring step.

10 . The power storage device manufacturing method according to claim 1 , wherein the pressure operation is performed before the process.

11 . The power storage device manufacturing method according to claim 1 , wherein the internal space capacity is measured based on a time needed for the pressure inside the case to reach a predetermined pressure due to the pressure operation inside the case.

Assignees

• Toyota Jidoshokki Kk

Inventors

• Yamada Hidaka
• Hamaguchi Yohei
• Kinoshita Kyoichi
• Yamaguchi Yusuke

Classifications

• G01F17/00 Primary

  Methods or apparatus for determining the capacity of containers or cavities, or the volume of solid bodies (measuring linear dimensions to determine volume G01B) · CPC title

• G01M3/329

  for verifying the internal pressure of closed containers · CPC title

• H01M10/04

  Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence) · CPC title

• H01M10/4228

  Leak testing of cells or batteries · CPC title

• H01M50/645

  Plugs · CPC title