Flexible packaging lithium-ion battery
A lithium-ion battery and flexible packaging technology, which is applied to secondary batteries, battery pack components, circuits, etc., can solve the problems of low strength of packaging films, inability to effectively resist external impact, and reduce the energy density of flexible packaging lithium-ion batteries. Energy density, the effect of avoiding bloating
Active Publication Date: 2017-02-08
NINGDE AMPEREX TECH +1
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AI Technical Summary
Problems solved by technology
[0004] However, the existing flexible packaging lithium-ion batteries have at least the following defects: First, the packaging film has low strength and cannot effectively resist external shocks
However, adding tape will also reduce the energy density of flexible lithium-ion batteries
Method used
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Embodiment Construction
[0020] see figure 1 As shown, it is a schematic diagram of the first embodiment of the soft-packaged lithium-ion battery of the present invention (square soft-packaged lithium-ion battery), which includes a battery core 10 and a packaging film 20 for packaging the battery core 10 .
[0021] The battery cell 10 is provided with a cell main body 102 and a pair of tabs 30 extending from one end of the cell main body 102 (the positive tab and the negative tab are not distinguished in this embodiment). The tab lead-out surface 104 from which the ear 30 is drawn, the tail surface 106 opposite to the tab lead-out surface 104 , and a pair of side surfaces 108 between the lead-out surface 104 and the tail surface 106 . The area where the side surface 108 meets the tab lead-out surface 104 and the tail surface 106 is the four main corners 110 of the battery cell 10 .
[0022] The packaging film 20 wrapping the battery core 10 has a tab leading edge 204 corresponding to the tab leading ...
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The invention discloses a flexible packaging lithium ion battery which comprises a battery core and a packaging film which is used for encapsulating the battery core, wherein the battery core is provided with a battery core main body and a pair of electrode lugs extended from the battery core main body; the battery core main body is provided with an electrode lug leading surface, a tail surface opposite to the electrode lug leading surface and a side which is positioned between the electrode lug leading surface and the tail surface, and the electrode lug leading surface is formed by leading the electrode lugs out of the battery core main body; the side of the battery core main body and a region at which the electrode lug leading surface and the tail surface are jointed form a main body corner; the packaging film for packaging the battery core is provided with an electrode lug leading edge corresponding to the electrode lug leading surface, a seal edge corresponding to the side of the battery core main body and a tail edge corresponding to the tail surface; and butadiene styrene rubber is added to at least one part in the electrode lug leading edge, the seal edge, the side of the battery core main body, the battery core main body, the tail surface of the battery core main body and the main body corner and then solidified. In the flexible packaging lithium ion battery disclosed by the invention, the butadiene styrene rubber is adopted to fix the battery core and the packaging film, thereby improving the safety performance and energy density of the flexible packaging lithium ion battery.
Description
technical field [0001] The invention belongs to the field of lithium ion batteries, more specifically, the invention relates to a soft package lithium ion battery with good safety performance and energy density. Background technique [0002] In recent years, flexible packaging lithium-ion batteries have been widely used in smartphones, notebook computers and electric vehicles. With the rise of the low-carbon economy, flexible packaging lithium-ion batteries have gained a good development space. However, with the development of technology and the improvement of living standards, consumers have higher and higher requirements for the safety performance and energy density of flexible packaging lithium-ion batteries. [0003] Flexible packaging lithium-ion batteries usually include a cell body with positive and negative tabs and a packaging material wrapping the cell body. The commonly used packaging material is a packaging film. [0004] However, the existing flexible packagin...
Claims
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IPC IPC(8): H01M10/0525H01M2/26H01M2/08
CPCY02E60/10
Inventor 郭彬彬
Owner NINGDE AMPEREX TECH