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Wound battery electrode, wound battery cell, and battery

A wound-type pole piece technology, which is applied in the fields of batteries, wound-type battery pole pieces, and wound-type batteries, can solve the problems of occupying space, multiple spaces, and low space utilization, and achieve precise position correspondence, The effect of increasing the volume energy density and improving the utilization rate

Active Publication Date: 2016-06-08
CHINA AVIATION LITHIUM BATTERY LUOYANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Batteries made of laminated and multi-tab winding cells have a high space utilization rate in the width direction, but the space utilization rate in the height direction is low due to the connection between tabs and cover plates occupying more space
The all-tab winding battery has a higher space utilization rate in the height direction, but the space utilization rate in the width direction is lower because the tabs on both sides occupy a certain amount of space.

Method used

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  • Wound battery electrode, wound battery cell, and battery
  • Wound battery electrode, wound battery cell, and battery
  • Wound battery electrode, wound battery cell, and battery

Examples

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Embodiment Construction

[0046] Embodiments of the battery of the present invention:

[0047] Such as Figure 7-13 As shown, the battery in this embodiment is a lithium-ion battery, and in other embodiments, it can also be other types of batteries, such as nickel-metal hydride batteries, nickel-cell batteries, and the like. The lithium ion battery of this embodiment includes a wound cell 100 and a cover plate 400 electrically connected to the wound cell, and the wound cell is a square wound cell. The square winding cell includes a positive electrode sheet 110, a negative electrode sheet 120, and two separators 130 sandwiched between the positive electrode sheet and the negative electrode sheet. After stacking the positive electrode sheet, separator, negative electrode sheet, and separator in sequence, Rolled in a square needle, or rolled in a cylindrical needle and flattened. The square winding battery cell is flat as a whole, and the middle part is a positive electrode sheet, a negative electrode s...

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Abstract

The invention relates to a wound battery electrode, a wound battery cell and a battery and belongs to the technical field of batteries. The wound battery electrode comprises a current collector and an electrode material layer attached to the current collector and is characterized in that the edge of the electrode is provided with a blind area not attached the electrode material layer and used to form a tab, and the width of the blank area in the width direction of the electrode is less than that of the electrode. The wound battery electrode is convenient to electrically connect with a pole on a battery cover plate, and two-directional space in the battery is saved.

Description

technical field [0001] The invention relates to a pole piece for a winding battery, a winding battery core and a battery, and belongs to the technical field of batteries. Background technique [0002] The volumetric energy density is an important performance index of the battery. With the rapid development of new energy vehicles, the volumetric energy density of the automotive power lithium-ion battery is becoming higher and higher. The volumetric energy density of the power battery directly determines the energy density of the electric vehicle. The cruising range (or the size of the space occupied by the battery module). In order to increase the volumetric energy density of automotive power lithium-ion batteries, there are two main approaches commonly used: one is to increase the compacted density and gram capacity of active materials; the other is to increase the utilization rate of the internal space of the battery and reduce the invalid space. [0003] At present, most ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/0587H01M4/13
CPCH01M4/13H01M10/0525H01M10/0587Y02E60/10Y02P70/50
Inventor 陈天振徐小龙潘芳芳赵博辛晓冬邱彦星张晓龙
Owner CHINA AVIATION LITHIUM BATTERY LUOYANG
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