Novel adjustable SOC symmetric battery and preparation method thereof

A symmetrical battery, a new type of technology, applied in the manufacture of electrolyte batteries, secondary batteries, battery pack components, etc., can solve the problems of large damage to the pole piece, great influence on the performance of the pole piece, and low efficiency

Active Publication Date: 2020-04-14
ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Symmetrical batteries need to be in an activated state when testing the impedance of the pole piece. The existing production method needs to remove the pole piece to be tested from the finished battery, and then select the same kind of pole pieces to assemble into a symmetrical battery. In this process, the damage to the pole piece is great. , It has a great influence on the performance of the pole piece, and the efficiency is low

Method used

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  • Novel adjustable SOC symmetric battery and preparation method thereof
  • Novel adjustable SOC symmetric battery and preparation method thereof
  • Novel adjustable SOC symmetric battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1a

[0112] A new type of adjustable SOC symmetric battery, see figure 1 and figure 2 , including a working electrode 1 , a counter electrode 2 , a separator 3 , an electrolyte and a package case 4 , and the working electrode 1 , the counter electrode 2 , the separator 3 and the electrolyte are packaged in the package case 4 .

[0113] The working electrode 1 is two electrodes of the same sex, and one side of the working electrode 1 is provided with a first tab 5; the counter electrode 2 is a metal lithium sheet, and one side of the counter electrode 2 is provided with a second tab 6, and the first tab The ear 5 and the second pole ear 6 are arranged opposite to each other and respectively connected to the external connection part 8 of the terminal, and the external connection part 8 of the terminal is fixed to pass through the outside of the packaging case 4 . Wherein, the two first tabs 5 are respectively connected to different external terminal parts 8 .

[0114] A layer of i...

Embodiment 1b-1c

[0143] Examples 1b-1c are all based on the methods in the examples, and the dosage of the components of the isolation film 3 (modified PE film) is adjusted. For specific adjustments, see Table 1 below:

[0144] Table 1 Components and dosage parameters of the isolation film of Examples 1a-1c

[0145] Example 1a Example 1b Example 1c metallocene polyethylene 35 30 40 General purpose HDPE 35 40 30 EPDM 2 1 3 silicone 2 1 2 glass fiber 4 3 5

Embodiment 1d

[0147] In this embodiment, on the basis of the method in Embodiment 1a, the isolation film 3 is a PE film of the type Grion 0011V purchased from Hangzhou Lvhe Environmental Protection Technology Co., Ltd.

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Abstract

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a novel adjustable SOC symmetric battery and a preparation method thereof. The symmetric battery comprises working electrodes, a counter electrode, an isolating membrane, an electrolyte and a packaging shell, and the working electrode, the counter electrode, the isolating membrane and the electrolyteare packaged in the packaging shell; wherein the working electrodes are two same-polarity electrodes, and a first tab is arranged on one side of each working electrode; the counter electrode is a metal lithium sheet, a second tab is arranged on one side of the counter electrode, and the first tab and the second tab are oppositely arranged; two side surfaces of each working electrode are providedwith at least one layer of isolating membrane, and two side surfaces of the counter electrode are provided with at least one layer of isolating membrane. According to a symmetric battery, the SOC of the working electrode can be adjusted in real time according to actual requirements; according to the preparation method, the situation that the performance of the lithium battery is reduced due to pole piece damage, pole piece resistance increase and the like can be eliminated, so that the impedance performance of the positive and negative electrode materials of the lithium battery to-be-tested under different SOCs can be evaluated more accurately and efficiently, and more comprehensive basic evaluation data can be obtained.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, in particular to a novel adjustable SOC symmetrical battery and a preparation method thereof. Background technique [0002] Batteries are currently the most important electrochemical energy storage technology, generally including positive (cathode) pole, negative (anode) pole, electrolyte, diaphragm, shell accessories and other basic components. In order to obtain a higher electromotive force, traditional battery technology adopts an asymmetric design, that is, the positive (cathode) and negative (anode) electrodes use different electrode materials, such as lithium-ion batteries, lead-acid batteries, nickel-metal hydride batteries, and alkaline-manganese batteries. Wait. [0003] Lithium-ion batteries have been favored by the market in recent years and have developed rapidly due to their high energy density, long cycle life, and low environmental pollution during the production pro...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/0525H01M2/16H01M2/18
CPCH01M10/058H01M10/0525H01M50/431H01M50/44H01M50/463Y02E60/10Y02P70/50
Inventor 许晓雄刘冀鹏张永龙
Owner ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
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