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Secondary battery, battery pack, and vehicle

A secondary battery and solid electrolyte technology, applied in secondary batteries, battery/battery traction, secondary battery repair/maintenance, etc., can solve problems such as unsatisfactory charging and discharging, and achieve excellent cycle life performance and preservation characteristics excellent effect

Active Publication Date: 2022-01-28
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in an aqueous electrolyte, the lithium-titanium oxide intercalation / deintercalation potential is about 1.5 V (vs. Li / Li + ), thus easily causing the electrolysis of water
On the other hand, in the lithium manganese oxide of the positive electrode, there is also the problem that the cations in the aqueous solution are oxidized to generate gas, which cannot be charged and discharged satisfactorily.

Method used

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  • Secondary battery, battery pack, and vehicle
  • Secondary battery, battery pack, and vehicle
  • Secondary battery, battery pack, and vehicle

Examples

Experimental program
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Effect test

no. 1 Embodiment approach

[0025] According to the first embodiment, a secondary battery is provided. This secondary battery includes a positive electrode, a negative electrode including a negative electrode active material-containing layer, an aqueous electrolyte, and a separator. The negative electrode active material containing layer contains negative electrode active material particles and solid electrolyte particles having lithium ion conductivity. The porosity of the negative electrode active material-containing layer is in the range of 0.1% to 28%, and the water content of the negative electrode active material-containing layer is 0.01g / cm 3 ~0.4g / cm 3 In the range.

[0026] In the negative electrode of a secondary battery containing an aqueous electrolyte, electrolysis of water tends to occur because hydrogen overvoltage is low. The electrolysis of water is represented by the following formula (1).

[0027] 2H 2 O→H 2 +2OH - …(1)

[0028] The inventors of the present invention have found...

no. 2 Embodiment approach

[0170] According to the second embodiment, a battery pack is provided. This battery pack includes the secondary battery of the first embodiment. This battery pack may include one secondary battery according to the first embodiment, or may include a battery module including a plurality of secondary batteries.

[0171] The battery pack of the embodiment may further include a protection circuit. The protection circuit has a function of controlling charge and discharge of the secondary battery. Alternatively, a circuit included in a device using a battery pack as a power source (for example, electronic equipment, a vehicle, etc.) may also be used as a protection circuit for the battery pack.

[0172] In addition, the battery pack according to the embodiment may further include an external terminal for conducting electricity. The external terminals for energization are used to output current from the secondary battery to the outside and / or input current to the secondary battery ...

no. 3 Embodiment approach

[0195] According to a third embodiment, a vehicle is provided. This vehicle is equipped with the battery pack of the second embodiment.

[0196] In the vehicle of the embodiment, the battery pack recovers, for example, regenerative energy of the motive power of the vehicle. A vehicle may include a mechanism for converting kinetic energy of the vehicle into regenerative energy.

[0197] Examples of vehicles include two- to four-wheel hybrid electric vehicles, two- to four-wheel electric vehicles, power-assisted bicycles, and railway vehicles.

[0198] The mounting position of the battery pack in the vehicle is not particularly limited. For example, when the battery pack is mounted on a vehicle, the battery pack may be mounted in an engine room of the vehicle, behind a vehicle body, or under a seat.

[0199] Vehicles can carry multiple battery packs. At this time, the battery packs may be electrically connected in series, may be electrically connected in parallel, or may be ...

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Abstract

The present invention relates to a secondary battery, a battery pack, and a vehicle. Specifically, the present invention provides a secondary battery excellent in charge and discharge characteristics, storage characteristics, and cycle life performance, a battery pack including the secondary battery, and a vehicle including the battery pack . According to one embodiment, a secondary battery is provided. This secondary battery includes a positive electrode, a negative electrode including a negative electrode active material-containing layer, an aqueous electrolyte, and a separator. The negative electrode active material containing layer contains negative electrode active material particles and solid electrolyte particles having lithium ion conductivity. The porosity of the negative electrode active material-containing layer is in the range of 0.1% to 28%, and the water content of the negative electrode active material-containing layer is 0.01g / cm 3 ~0.4g / cm 3 In the range.

Description

technical field [0001] Embodiments of the present invention relate to a secondary battery, a battery pack, and a vehicle. Background technique [0002] Non-aqueous electrolyte batteries, particularly lithium secondary batteries, which use carbon materials or lithium titanium oxides as negative electrode active materials and layered oxides containing nickel, cobalt, manganese, etc., as positive electrode active materials have been used as power sources in a wide range of fields. Practical. The form of such a nonaqueous electrolyte battery is applicable to a wide range of fields from small batteries used in various electronic devices and the like to large batteries used in electric vehicles and the like. Unlike nickel metal hydride batteries or lead storage batteries, non-aqueous organic solvents mixed with ethylene carbonate, ethyl methyl carbonate, and the like are used in the electrolytic solution of these lithium secondary batteries. The electrolytic solution using these...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/36H01M4/02H01M4/485H01M50/209H01M50/271H01M50/296H01M50/298
CPCH01M10/36H01M2220/20H01M2300/0002H01M50/298H01M50/296H01M50/271H01M50/209H01M4/622H01M4/628H01M2004/021H01M2004/027B60L2240/545B60L2240/547B60L58/21B60L50/64H01M4/485H01M4/525H01M4/5825H01M4/505Y02T10/7072Y02T10/70Y02T90/14Y02E60/10Y02P70/50H01M10/38B60L7/10H01M10/425H01M10/46H01M4/48H02J7/14H01M2010/4271H01M2300/0091H01M2300/0068H01M2300/0071H01M2300/0082B60L53/00
Inventor 吉间一臣松野真辅
Owner KK TOSHIBA