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Battery

A battery and electrolyte technology, applied in the field of electrochemical energy storage, can solve the problems of inability to weigh and sort the electrode active material layer, poor battery consistency control, etc., and achieve the effect of good cycle performance, low price and high energy

Inactive Publication Date: 2014-12-31
POSITEC POWER TOOLS (SUZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the usual coating method of lithium-ion battery electrodes, and the slurry-pulling method of nickel-metal hydride and nickel-cadmium batteries are all to coat the active material layer on the surface of the current collector at one time. The advantage is that the production process is relatively simple, but it cannot be separately The electrode active material layer with active material, conductive agent and necessary binder is weighed, sorted, etc., resulting in poor control of battery consistency

Method used

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preparation example Construction

[0109] The preparation method of the positive electrode sheet is not particularly limited. In a specific embodiment, a slurry containing the positive electrode active material is first prepared, and then the slurry is formed on a carrier, and the positive electrode active material is formed on the carrier by drawing slurry.

[0110] The carrier mainly plays the role of supporting the active material of the positive electrode. The carrier itself is electrochemically inert. According to those skilled in the art, the electrochemical inertness means that the carrier does not participate in any electrochemical reaction, and it stably exists in the positive electrode sheet, and only serves as a support for the active material layer. The matrix exists.

[0111] In a specific embodiment, the carrier is electronically insulated and has a porous structure. Specifically, the pore size of the carrier ranges from 50 mesh to 200 mesh. In this way, under the premise of ensuring that the carrier ha...

Embodiment approach 1

[0177] See figure 1 with figure 2 As shown, the battery 20 includes a positive lead electrode 22, at least one bipolar electrode 24, a negative lead electrode 26, and an aqueous electrolyte 28. The positive lead electrode 22, the bipolar electrode 24, and the negative lead electrode 26 are arranged in a layered manner. The positive lead electrode 22 and the negative lead electrode 26 are respectively located at the uppermost layer and the lowermost layer. The bipolar electrode 24 and the aqueous electrolyte 28 are arranged on the positive lead electrode. Between 22 and negative lead electrode 26. Specific to figure 1 In this case, the battery 20 includes two bipolar electrodes 24.

[0178] The positive extraction electrode 22 includes a positive electrode current collector 30 and a positive electrode sheet 23 disposed on one side of the positive electrode current collector 30. The positive electrode sheet 23 includes a positive electrode active material 50 that can reversibly ex...

Embodiment approach 2

[0214] See Figure 5 As shown, the second embodiment provides a battery 100 including a positive lead electrode 40, at least one bipolar electrode 24, a negative lead electrode 26, and an aqueous electrolyte 28. The bipolar electrode 24 is laminated and arranged between the positive lead electrode 40 and the negative lead electrode 26, and the positive lead electrode 40 and the negative lead electrode 26 are respectively located at the uppermost layer and the lowermost layer.

[0215] The difference from the first embodiment is that the positive extraction electrode 40 includes a composite current collector and a positive electrode sheet 23 arranged on one side of the composite current collector 30. The composite current collector includes a positive current collector 30 and a conductive film 12 coated on the positive current collector 30. .

[0216] The conductive film 12 can be coated on one or both sides of the positive electrode current collector 30 by vacuuming, hot-pressing c...

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Abstract

The invention discloses a battery, which includes an anode, a cathode and an aqueous electrolyte solution. The anode comprises a composite current collector and an anode sheet. The composite current collector comprises an anode current collector and a conductive film coating the anode current collector. The anode sheet includes an anode active substance, which can realize reversible prolapse and embedding of ions. The cathode is a metal, alloy or carbon based material. The aqueous electrolyte solution includes an electrolyte, which can at least ionize active ions. The active ions are reduced and deposited at the cathode to form a cathode active substance during charging, and the cathode active substance is oxidized and dissolved in the aqueous electrolyte solution during discharging. The battery provided by the invention has good cycle performance and high energy, and is hopeful to be widely applied in large energy storage, power grid peak shaving and other fields.

Description

Technical field [0001] The invention belongs to the field of electrochemical energy storage, and specifically relates to a battery. Background technique [0002] In recent years, with the development of science and technology, the demand for energy, especially renewable green energy, has become more and more prominent. As an energy storage and conversion device, batteries are playing an irreplaceable role. In a large stack consisting of a huge number of batteries, in addition to the electrochemical characteristics of the battery itself, the consistency of the battery manufacturing process becomes particularly important. [0003] Among the many types of batteries, lithium secondary batteries have many advantages compared with traditional nickel-metal hydride and nickel-cadmium secondary batteries, such as high energy density and light weight, and can be used in portable electronic products such as notebook computers; high working voltage , Low self-discharge, long cycle life, no me...

Claims

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Application Information

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IPC IPC(8): H01M10/04H01M2/14
CPCH01M10/36H01M10/38Y02E60/10Y02P70/50
Inventor 颜竞刘洋陈璞
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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