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Secondary batteries, assembled batteries, battery packs and vehicles

A secondary battery and battery pack technology, applied in secondary batteries, battery electrodes, battery components, etc., can solve the problems of non-aqueous electrolyte battery charging, temperature rise, and fire

Active Publication Date: 2021-08-13
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the non-aqueous electrolyte battery has the risk of fire due to overcharging, temperature rise, impact, etc.

Method used

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  • Secondary batteries, assembled batteries, battery packs and vehicles
  • Secondary batteries, assembled batteries, battery packs and vehicles
  • Secondary batteries, assembled batteries, battery packs and vehicles

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0042] According to the first embodiment, there is provided a secondary battery including a positive electrode, a negative electrode, and an electrolyte. The negative electrode contains at least one element selected from B, P, Al, La, Zr, Ge, Zn, Sn, Ga, Pb, In, Bi, and Tl (hereinafter referred to as additive element) and particles containing titanium oxide. The electrolyte contains an aqueous solvent and lithium ions. The electrolyte can increase ion conductivity to more than 10 times that of non-aqueous electrolytes. When a negative electrode containing particles containing titanium oxide is combined as a negative electrode active material with such an aqueous electrolyte, hydrogen gas is generated, which hinders insertion and extraction of lithium ions in the negative electrode. The present inventors discovered for the first time that by adding additional elements in the negative electrode, the hydrogen generation rate in the titanium-containing oxide can be reduced, the h...

no. 2 Embodiment approach

[0120] According to the second embodiment, it is possible to provide a battery pack in which the secondary battery is a unit cell. As the secondary battery, the secondary battery of the first embodiment can be used.

[0121] Examples of the battery pack include a battery pack comprising a plurality of single cells electrically connected in series or in parallel as a constituent unit, a unit comprising a plurality of single cells electrically connected in series, or a unit formed of a plurality of single cells electrically connected in parallel. A battery pack or the like of a unit formed by electrically connecting a plurality of single cells.

[0122] The battery pack can also be accommodated in the frame. A metal can, a plastic container, etc. made of aluminum alloy, iron, stainless steel, etc. can be used for a frame body. In addition, the wall thickness of the container is preferably 0.5 mm or more.

[0123] Examples of the form in which a plurality of secondary batteries ...

no. 3 Embodiment approach

[0127] According to the third embodiment, there can be provided a battery pack including at least one secondary battery according to the first embodiment and a circuit unit for controlling charging and discharging of the secondary battery. When a battery pack is formed of a plurality of secondary batteries, the battery pack of the second embodiment can be used.

[0128] The battery pack may also have a circuit unit connected to a secondary battery before being mounted on a vehicle such as a motor vehicle or an electronic device, but the battery pack according to the embodiment includes a battery pack in which a circuit unit included in a vehicle such as a motor vehicle is connected to a secondary battery. battery pack.

[0129] refer to Figure 6 An example of a battery pack will be described. The battery pack 40 is equipped with a image 3 , 4 A battery pack composed of the secondary battery shown. The battery pack 40 includes a frame body 41 and an assembled battery 42 ...

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Abstract

According to an embodiment, there is provided a secondary battery including a positive electrode, a negative electrode, and an electrolyte. The negative electrode contains at least one element selected from B, P, Al, La, Zr, Ge, Zn, Sn, Ga, Pb, In, Bi and Tl and a titanium-containing oxide. The electrolyte contains an aqueous solvent and lithium ions.

Description

technical field [0001] Embodiments of the present invention relate to a secondary battery, an assembled battery, a battery pack, and a vehicle. Background technique [0002] Non-aqueous electrolyte batteries using lithium metal, lithium alloys, lithium compounds, or carbonaceous materials in the negative electrode are expected to be high-energy-density batteries, and research and development thereof have been extensively carried out. So far, there are LiCoO-containing 2 or LiMn 2 o 4 Lithium ion secondary batteries having a positive electrode as an active material and a negative electrode containing a carbonaceous material capable of intercalating and deintercalating lithium are widely used in portable devices. [0003] On the other hand, in the case of being mounted on vehicles such as automobiles and trains, from the perspective of storage performance in high temperature environments (above 60°C), cycle performance, long-term reliability of high output, etc., the consti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/36C01G23/00C01G23/047C01G33/00H01M4/13H01M4/131H01M4/36H01M4/58H01M4/62H01M4/485H01M4/02H01M4/48H01M4/505H01M4/525
CPCH01M4/36H01M4/485H01M4/58H01M4/62H01M10/36H01M10/24H01M10/26H01M4/628H01M4/364H01M4/366H01M4/625H01M4/626H01M2300/0002Y02E60/10H01M4/505H01M4/525H01M4/5825H01M2220/20H01M50/20H01M4/131H01M50/543H01M10/425H01M50/502H01M4/136Y02T10/70
Inventor 高见则雄山下泰伸松野真辅原田康宏稻垣浩贵
Owner KK TOSHIBA