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A high specific energy density lithium-ion battery

A lithium-ion battery, energy density technology, applied in the direction of battery electrodes, secondary batteries, battery components, etc., can solve the problem of low energy density, achieve high conductivity, improve conductivity and adhesion, and power performance Improved effect

Active Publication Date: 2019-05-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For pure electric vehicles, long-term driving requires high energy density of batteries, and the energy density of current vehicle batteries is generally 100-150Wh / kg, equivalent to one percent of gasoline, so the current largest power battery The technical short board is that the energy density is too low

Method used

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  • A high specific energy density lithium-ion battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, the positive electrode sheet 2 and the negative electrode sheet 3 of the lithium-ion battery interleavedly stacked with the composite aluminum-plastic packaging film 1, and the separator 4 sandwiched between the positive electrode sheet 2 and the negative electrode sheet 3 are packaged, and the commercial electrolyte is injected according to the conventional method. One end of each positive pole piece 2 fixes a positive pole tab 5 through an output tab foil 7, and the other end fixes a connection tab foil 8; one end of each negative pole piece 3 fixes a negative pole tab 6 through an output tab foil 7, The other end is fixed with a connecting tab foil 8; the tops of all positive tabs 5 and negative tabs 6 are aligned, all the connecting tab foils 8 fixed on the positive electrode sheet 2 are connected together, and all the connecting tab foils 8 fixed on the negative electrode sheet 3 are connected together. The current collector of the posit...

Embodiment 2

[0033] Such as figure 1 As shown, the positive electrode sheet 2 and the negative electrode sheet 3 of the lithium-ion battery interleavedly stacked with the composite aluminum-plastic packaging film 1, and the separator 4 sandwiched between the positive electrode sheet 2 and the negative electrode sheet 3 are packaged, and the commercial electrolyte is injected according to the conventional method. One end of each positive pole piece 2 fixes a positive pole tab 5 through an output tab foil 7, and the other end fixes a connection tab foil 8; one end of each negative pole piece 3 fixes a negative pole tab 6 through an output tab foil 7, The other end is fixed with a connecting tab foil 8; the tops of all positive tabs 5 and negative tabs 6 are aligned, all the connecting tab foils 8 fixed on the positive electrode sheet 2 are connected together, and all the connecting tab foils 8 fixed on the negative electrode sheet 3 are connected together. The current collector of the posit...

Embodiment 3

[0037] Such as figure 1As shown, the positive electrode sheet 2 and the negative electrode sheet 3 of the lithium-ion battery interleavedly stacked with the composite aluminum-plastic packaging film 1, and the separator 4 sandwiched between the positive electrode sheet 2 and the negative electrode sheet 3 are packaged, and the commercial electrolyte is injected according to the conventional method. One end of each positive pole piece 2 fixes a positive pole tab 5 through an output tab foil 7, and the other end fixes a connection tab foil 8; one end of each negative pole piece 3 fixes a negative pole tab 6 through an output tab foil 7, The other end is fixed with a connecting tab foil 8; the tops of all positive tabs 5 and negative tabs 6 are aligned, all the connecting tab foils 8 fixed on the positive electrode sheet 2 are connected together, and all the connecting tab foils 8 fixed on the negative electrode sheet 3 are connected together. The current collector of the positi...

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Abstract

The invention discloses a lithium-ion battery with high specific energy density. The lithium-ion battery comprises a composite aluminum-plastic package film, positive and negative plates stacked in an interlaced manner, a diaphragm sandwiched between the positive and negative plates, positive and negative plates, There are positive tabs and negative tabs protruding from the negative pole pieces respectively; the production process adopted in the present invention is the "Z"-shaped lamination method, and the positive and negative pole pieces are prepared by multi-layer coating thick film technology, which not only ensures the bonding force , and improve battery performance. In the present invention, the nickel-cobalt-aluminum ternary composite material is used as the positive electrode active material, and the silicon-carbon composite material is used as the negative electrode active material to prepare a high specific energy density lithium-ion battery with a weight specific energy as high as 261.7Wh / kg.

Description

technical field [0001] The invention relates to a high specific energy density lithium ion battery, in particular to a high specific energy density lithium ion battery. Background technique [0002] At present, China is facing two major problems of environmental pollution and energy crisis, and the popularization of fuel vehicles is one of the important reasons for the above two problems. The development of electric vehicles is an important means to effectively solve the above problems, and its technical bottleneck lies in its Powered by lithium-ion batteries. Lithium-ion batteries began to be researched and developed in the early 1980s. They were initially mainly used in portable devices. As their market continued to expand, they also played an important role in various types of electric vehicles and energy storage systems. Compared with other traditional secondary batteries, lithium-ion batteries have the advantages of high cell voltage, large specific energy, and low sel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0525H01M10/058H01M2/26H01M4/525H01M4/1391H01M4/62H01M50/531
CPCH01M4/1391H01M4/525H01M4/622H01M4/625H01M10/0525H01M10/058H01M50/531Y02E60/10Y02P70/50
Inventor 高翔张帆罗英武郑哲楠
Owner ZHEJIANG UNIV
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