Battery cell of coiled lithium ion battery

A lithium-ion battery, wound-type technology, applied in the direction of secondary batteries, circuits, electrical components, etc., can solve the problems of affecting the overcurrent capacity, damage, and inability to guarantee the structural strength, etc., to achieve the convenience of welding and ensure the current carrying capacity Effect

Active Publication Date: 2018-08-28
SHANGHAI RUIPU ENERGY CO LTD +1
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  • Abstract
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  • Claims
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Problems solved by technology

When adopting this method, the method commonly used at this stage is to align the tabs, but in this way, during subsequent laser welding, high requirements are placed on the power control of the welding machine, and the power is too low to ensu

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  • Battery cell of coiled lithium ion battery
  • Battery cell of coiled lithium ion battery

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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0016] Such as figure 1 As shown, the electric core of a kind of winding type lithium ion battery provided by the present invention comprises electric core body 1 and two electrodes 2, and electric core is made of such as figure 2 The pole piece shown is formed by winding, and the pole piece includes a pole piece body 3 and a pole piece 31. After winding, the pole piece body 3 forms a cell body 1, and several pole pieces 31 are dislocated and stacked to form an electrode 2, as shown in FIG. fig...

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Abstract

The invention provides a battery cell of a coiled lithium ion battery. The battery cell is made by overlaying and winding two layers of pole pieces and two layers of diaphragms alternatively, whereineach pole piece comprises a pole piece body and a plurality of leads; the battery cell body is formed by coiling the pole piece bodies; an electrode is formed after the leads are overlaid in a staggered way; the total width of the electrode is D. Compared with the prior art, the battery cell has the beneficial effects that the leads are molded by coiling with a coiling needle after mold cutting, and different circles of leads are not aligned completely in a staggered way, so that the current carrying ability of the leads is ensured, and convenience can be brought to welding.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to an electric core of a wound lithium ion battery. Background technique [0002] In recent years, the new energy industry dominated by lithium-ion batteries has developed rapidly. The manufacturing technology of lithium-ion batteries has gradually developed from the original circular winding and square lamination to the current square winding. When the square winding method is used to prepare, in order to provide energy density, the industry generally adopts multi-tab die-cutting for pole piece processing. When adopting this method, the method commonly used at this stage is to align the tabs, but in this way, during subsequent laser welding, high requirements are placed on the power control of the welding machine, and the power is too low to ensure that all tabs are aligned. Being welded will not only affect the flow capacity, but also cannot guarantee th...

Claims

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Application Information

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IPC IPC(8): H01M10/0587H01M10/0525
CPCH01M10/0525H01M10/0587Y02E60/10Y02P70/50
Inventor 刘微姜森张志明
Owner SHANGHAI RUIPU ENERGY CO LTD
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