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Secondary battery, battery assembly, and vehicle equipped with the secondary battery

A technology for secondary batteries and electrode bodies, applied in secondary batteries, secondary battery manufacturing, secondary battery parts, etc., can solve the problem of not being able to load the electrode winding body, etc., and achieve the effect of improving battery performance

Active Publication Date: 2012-10-03
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, in fact, the load cannot be applied well to the electrode winding body

Method used

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  • Secondary battery, battery assembly, and vehicle equipped with the secondary battery
  • Secondary battery, battery assembly, and vehicle equipped with the secondary battery
  • Secondary battery, battery assembly, and vehicle equipped with the secondary battery

Examples

Experimental program
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Embodiment Construction

[0033] The best (preferred) implementation modes for realizing the present invention will be described in detail below with reference to the accompanying drawings. The secondary battery according to the present embodiment is basically as figure 1 Shown is a lithium ion secondary battery in which an electrode wound body 1 is sealed in a hard case 3 made of metal or hard resin.

[0034] The electrode wound body 1 is a member in which positive and negative electrode sheets (sheets) and a separator are laminated and wound into a flat roll shape. The electrode wound body 1 is inserted into the hard case 3 after being wound with the film member 2 for thickness adjustment. The hard case 3 is a flat case forming the outer shape of the secondary battery. The film member 2 is sandwiched between the inner surface of the hard case 3 and the electrode wound body 1 . When the hard case 3 is made of metal, the film member 2 also functions to insulate between the electrode wound body 1 an...

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PUM

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Abstract

A secondary battery comprises a flat wound electrode body, a flat-type hard case housing the wound electrode body, and a film sandwiched between them. The film is formed with thick portions each of which is located at a boundary region between a flat portion and a curved portion of the surface of the wound electrode body. When a plurality of the secondary batteries are bound, therefore, load is applied widely on almost the entire wound electrode body, thereby enabling exertion of sufficient generation capability. Thus, a secondary battery with improved battery performance is provided in whichload is sufficiently applied on an electrode body. The secondary battery can also be used as a battery assembly, a battery to be mounted on a vehicle, and a battery to be mounted on a battery mounting device.

Description

technical field [0001] The present invention relates to secondary batteries and battery packs thereof. In more detail, it relates to a secondary battery, a battery pack thereof, and a secondary battery equipped with a flat secondary battery that appropriately applies a binding load (binding load, clamping load) to an electrode body to improve battery performance. battery for the vehicle. Background technique [0002] Conventionally, rechargeable secondary batteries such as, for example, lithium-ion batteries have been used. Its use includes, for example, power supply to in-vehicle equipment of a vehicle, power supply (power source) of battery-mounted equipment, and the like. A secondary battery generally uses a stacked (overlapped) wound positive and negative electrode plates and a separator, and an electrode wound body impregnated with an electrolytic solution as a power generating element. Furthermore, secondary batteries generally have a structure in which the above-me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/00H01M10/0525H01M2/10H01M10/04B60R16/033
CPCY02E60/12H01M10/0481H01M10/0431H01M10/02Y02E60/10Y02P70/50H01M50/20
Inventor 丸山宜之根本雄太
Owner TOYOTA JIDOSHA KK