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Pole piece, battery and electronic device

A technology of electronic devices and pole pieces, applied in battery electrodes, circuits, electrode manufacturing, etc., can solve problems such as heat accumulation and temperature impact on battery life and performance, and achieve the effect of improving the rate and cycle performance

Pending Publication Date: 2022-03-08
DONGGUAN POWERAMP TECH LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-power batteries will generate a lot of heat during high-current charging and discharging. Due to the difference in battery structure and heat dissipation conditions, the existing pole piece settings are likely to cause a large temperature difference between the head and tail of the electrode assembly and the middle of the electrode assembly. Heat accumulation and temperature imbalance will affect the life and performance of the cell

Method used

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  • Pole piece, battery and electronic device
  • Pole piece, battery and electronic device
  • Pole piece, battery and electronic device

Examples

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some, not all, embodiments of the application.

[0029] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only.

[0030] Unless otherwise defined, all technical and scientific terms...

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Abstract

The invention provides a pole piece. The pole piece comprises a current collector and an active material layer arranged on the surface of the current collector. The active material layer comprises a first active material layer and a second active material layer, the hard carbon content of the first active material layer is larger than that of the second active material layer, and the graphite content of the first active material layer is smaller than that of the second active material layer. And the second active material layers are respectively arranged on two opposite sides of the first active material layer. According to the pole piece, the first active material layer and the second active material layer which are different in hard carbon content and graphite content are arranged in the width direction of the pole piece, so that the graphite content on the two sides of the pole piece is high, the hard carbon content in the middle of the pole piece is high, the temperature rise and dynamic performance of different areas on the pole piece are balanced, and the rate and cycle performance of a battery cell can be improved. The invention also provides a battery with the pole piece and an electronic device.

Description

technical field [0001] The present application relates to the field of batteries, in particular to a pole piece, a battery with the pole piece and an electronic device. Background technique [0002] In the existing electric core, the material of the active material layer on the pole piece is single and the structure is simple, usually one active material layer is simply coated on the surface of the current collector of the pole piece. High-power batteries will generate a lot of heat during high-current charging and discharging. Due to the difference in battery structure and heat dissipation conditions, the existing pole piece settings are likely to cause a large temperature difference between the head and tail of the electrode assembly and the middle of the electrode assembly. Heat accumulation and temperature imbalances can have an impact on cell life and performance. Contents of the invention [0003] In view of the above situation, an embodiment of the present applicat...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/583
CPCH01M4/04H01M4/583H01M2004/021Y02E60/10
Inventor 金娟吴飞张浩汪颖
Owner DONGGUAN POWERAMP TECH LTD
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