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Secondary battery, battery pack, and vehicle

A secondary battery and electrical connection technology, applied in the direction of secondary batteries, battery electrodes, battery components, etc.

Inactive Publication Date: 2018-10-09
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there is a big problem when using an aqueous electrolyte solution in a lithium-ion secondary battery

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
Comparison scheme
Effect test

no. 1 Embodiment approach

[0030] According to the first embodiment, a secondary battery is provided. The secondary battery includes a negative electrode provided with a negative electrode current collector, a negative electrode terminal electrically connected to the negative electrode current collector, a joint portion electrically connected to the negative electrode terminal and the negative electrode current collector, a water-repellent layer covering the joint portion, a positive electrode, and An aqueous electrolyte containing lithium salt or sodium salt, wherein the negative electrode terminal and the negative electrode current collector are respectively formed of zinc or an alloy containing zinc, or have a coating layer containing boehmite on at least a part of the surface; the hydrophobic layer The inner surface covers the junction, and the contact angle θ between the outer surface of the hydrophobic layer and water satisfies 80°≦θ.

[0031] In a secondary battery using an aqueous electrolyte, i...

no. 2 Embodiment approach

[0182] According to the second embodiment, there is provided a battery pack. This battery pack includes the secondary battery according to the first embodiment.

[0183] The battery pack may include one or more secondary batteries (single cells) according to the first embodiment described above. A plurality of secondary batteries included in the battery pack can be electrically connected in series, in parallel, or a combination of series and parallel.

[0184] The battery pack may further include a protection circuit. The protection circuit controls the charging and discharging of the secondary battery. Alternatively, a circuit included in a device that uses a battery pack as a power source (such as an electronic device, an automobile, etc.) can be used as a protection circuit for the battery pack.

[0185] In addition, the battery pack may further include external terminals for energization. The external terminal for energization is used to output current from the seconda...

no. 3 Embodiment approach

[0199] According to a third embodiment, a vehicle is provided. This vehicle includes the battery pack according to the second embodiment.

[0200] Examples of vehicles include two- to four-wheeled hybrid electric vehicles, two- to four-wheeled electric vehicles, and assist bicycles and trams.

[0201] Figure 15 An example of a vehicle including the battery pack according to the second embodiment is shown in .

[0202] Figure 15 The illustrated automobile 41 has a battery pack 42 installed in an engine compartment at the front of the vehicle body. The installation location of the battery pack in the car is not limited to the engine room. For example, the battery pack can also be mounted on the rear of the car body or under the seat.

[0203] Below, refer to Figure 16 The configuration of an embodiment of a vehicle including the secondary battery according to the embodiment will be described.

[0204] Figure 16 It is a diagram schematically showing the configuration ...

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Abstract

The embodiment of the present invention relates to a secondary battery, a battery pack and a vehicle. The secondary battery, the battery packwith the secondary battery, and the vehicle with the battery pack, which are provided by the invention, are excellent incycle life performance. According to one approach, a secondary battery is provided. The secondary batteryincludes a negative electrode including a negative electrode current collector, a negative electrode terminal electrically connected to the negative electrode current collector, a joint electrically connecting the negative electrode terminal and the negative electrode current collector (3a), and a water repellent layer covering the joint. The joint is covered with the inner surface of the water repellent layer. A contact angle theta with respect to water on an outer surface of the water repellent layer satisfies theta <= 80 degrees.

Description

technical field [0001] Embodiments of the present invention relate to a secondary battery, a battery pack, and a vehicle. Background technique [0002] In recent years, batteries using non-aqueous solvents such as lithium-ion secondary batteries have been developed as high-energy-density secondary batteries. Lithium-ion secondary batteries are superior in energy density and cycle characteristics compared to lead storage batteries and nickel-metal hydride secondary batteries, and are expected to be used as power sources for large-scale power storage such as vehicle power sources such as hybrid vehicles and electric vehicles. [0003] As an electrolytic solution of a lithium ion secondary battery, nonaqueous solvents, such as ethylene carbonate, diethyl carbonate, and propylene carbonate, are used from a viewpoint of having a wide potential window, for example. These solvents are flammable and thus have a problem in terms of safety. Therefore, if the non-aqueous solvent-base...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M4/66H01M50/176
CPCH01M4/66H01M10/36H01M50/176Y02E60/10H01M50/186H01M50/191H01M50/24H01M4/244H01M10/3945H01M2004/021B32B27/06H01M10/4207H01M4/0404
Inventor 伊势一树松野真辅高见则雄稻垣浩贵
Owner KK TOSHIBA
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