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Stability evaluation test device and stability evaluation test method for electric storage device

An evaluation test, a technology for accumulators, which is applied in the field of stability evaluation test devices for electrical storage devices, and can solve problems such as difficulties in quantifying battery stability

Inactive Publication Date: 2016-08-03
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, in Non-Patent Document 2, even if a plurality of evaluation tests are carried out under the same conditions for batteries of exactly the same specifications, all of them may not necessarily have the same event content, and there is a possibility of stability of the battery depending on the event content that occurs. It is extremely difficult to quantify such problems

Method used

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  • Stability evaluation test device and stability evaluation test method for electric storage device
  • Stability evaluation test device and stability evaluation test method for electric storage device
  • Stability evaluation test device and stability evaluation test method for electric storage device

Examples

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Embodiment approach 1

[0035] figure 1 It is a block diagram showing a schematic configuration of an electric storage device stability evaluation test device according to Embodiment 1 of the present invention. exist figure 1 Among them, the stability evaluation test device is a device that implements a stability evaluation test of an electrical storage device 1 (main body) as a test object, and the operation / test control unit 11 includes a basic data collection unit 12, a test data collection unit 13, an evaluation analysis part 14 and display part 15.

[0036] The operation / test control unit 11 applies operations such as heating, charging, short-circuiting, and nailing to the electrical storage device 1 from the outside. The basic data collection unit 12 collects basic characteristic data of the electric storage device 1 before the test. In addition, according to the type of test, in the operation / test control unit 11, the basic characteristics required for the test are determined, and the data ...

Embodiment 1

[0064] In Example 1, 96wt% lithium cobalt oxide (LiCoO 2 ), 1.5wt% acetylene black as a conductive additive, and NMP (N-MethylPyrrolidone: N-methylpyrrolidone) solution of PVDF (PolyVinylideneDiFluoride: polyvinylidene fluoride) as a binder (adhesive) is made of PVDF The whole mixture was mixed at 2.5 wt%, and 4 wt% was dispersed in NMP as a dispersion medium, thereby adjusting to obtain a positive electrode active material paste.

[0065] Next, the positive electrode active material paste was applied to both sides of an aluminum foil with a thickness of 18 μm as a positive electrode current collector, dried at 115° C., and then rolled by a press to adjust the porosity of the positive electrode to obtain a positive electrode.

[0066] In addition, 97wt% spherical artificial graphite as the negative electrode active material, styrene-butadiene rubber (SBR: StyreneButadieneRubber) as the binder, carboxymethyl cellulose (CMC: CarboxyMethylCellulose) solution as the thickener and ...

Embodiment 2

[0088] In Example 2, a lithium ion battery having a positive electrode and a negative electrode different from that of Example 1 was produced as a reference battery and a test battery. In addition to using the same lithium cobaltate as in Example 1 as the positive electrode for this lithium ion battery, the coating amount per unit area is set as 1.5 times that of Example 1 and the positive electrode active material paste is applied to an aluminum current collector with a thickness of 16 μm. It produced in the same manner as in Example 1 except on the foil.

[0089] In addition, the negative electrode was produced in the same manner as in Example 1, except that the coating amount of the negative electrode active material paste was applied to an 8 μm-thick copper current collector foil in an amount 1.5 times that of Example 1. Next, a small cylindrical lithium ion battery was produced in the same manner as in Example 1 using the positive electrode, negative electrode, and separa...

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Abstract

The invention is provided to obtain a stability evaluation test device and a stability evaluation test method for an electric storage device, which are capable of evaluating quantitatively the stability of the electric storage device. The stability evaluation test device is provided with: an operation / test control unit whereby the SOC of a test electric storage device being tested is set to a predetermined value, while the SOC of a standard electric storage device for comparison is set to a lower value than the SOC of the test electric storage device; a test data collection unit for measuring the temperature of the test electric storage device and the temperature of the standard electric storage device; and an evaluation and analysis unit for calculating the amounts of self-generated heat respectively for the test electric storage device and the standard electric storage device based on the temperatures of the electric storage devices measured at the test data collection unit, while evaluating the stability of the test electric storage device based on the ratio of the amounts of self-generated heat between the test electric storage device and the standard electric storage device.

Description

technical field [0001] The present invention relates to a stability evaluation test device and a stability evaluation test method for an electrical storage device for performing an evaluation test of the stability of an electrical storage device composed of a lithium ion battery or the like. Background technique [0002] In recent years, in the context of a low-carbon society, secondary batteries such as nickel-hydrogen batteries and lithium-ion batteries, electric double-layer capacitors, and power storage devices such as fuel cells have been developed. Among them, lithium-ion batteries are being used not only for conventional portable devices, but also as power sources for large-scale devices for system connection such as EVs, HEVs, and smart grids. [0003] Lithium-ion batteries, which are used as power sources for these large devices, are increasing in size and capacity compared to conventional power sources for portable devices. When selecting such a large-capacity batt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M10/058H01M10/48
CPCH01M10/4285H01M10/48H01M10/486Y02E60/10Y02P70/50G01N25/20
Inventor 吉濑万希子马殿进路吉冈省二
Owner MITSUBISHI ELECTRIC CORP
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