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Hollow carbon rod, preparation method and application thereof and die head used in preparation process

A hollow, carbon rod technology, applied in other household appliances, electrodes of primary batteries, applications, etc., can solve the problems of poor battery discharge capacity consistency, damage to the positive carbon package structure, and lack of strength of carbon rods, reducing micro Short-circuit phenomenon, uniform compaction density, and avoid the effect of falling powder

Pending Publication Date: 2020-04-10
EVE ENERGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problem with the battery assembly of this structure is that due to the strong electrostatic effect of the granular positive electrode, it is difficult for the equipment to evenly compact the positive electrode between the middle mold rod and the edge film, and the compacted carbon rod does not have a certain strength. , the installation of the intermediate ring-shaped current collector may cause damage to the structure of the positive electrode carbon package, which may lead to relatively poor discharge capacity consistency of the battery

Method used

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  • Hollow carbon rod, preparation method and application thereof and die head used in preparation process
  • Hollow carbon rod, preparation method and application thereof and die head used in preparation process
  • Hollow carbon rod, preparation method and application thereof and die head used in preparation process

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Embodiment 1

[0082] Preparation method of hollow carbon rod:

[0083] (1) Add polytetrafluoroethylene emulsion and isopropanol with a solid content of 60% into the solvent stirring tank of the mixer, and stir for 10 minutes at a frequency of 10 Hz to obtain a mixed solution;

[0084] (II) Add acetylene black into the mixer, add the mixed solution obtained in step (I) during the mixing process, and stir for 10 minutes to obtain a mixed slurry. In the mixed slurry, acetylene black, polytetrafluoroethylene emulsion and isopropyl The mass ratio of alcohol is 1:0.1:2;

[0085] (Ⅲ) the mixed slurry obtained in step (Ⅱ) is subjected to the following conditions at 30°C image 3 The die head shown is extruded, then conveyed by a conveyor, cut by an automatic cutting machine, and dried at 120°C to obtain a hollow carbon rod.

[0086] The front view and top view of the hollow carbon rod obtained in this embodiment are as follows Figure 6 and Figure 7 As shown, it can be seen from the figure tha...

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Abstract

The invention relates to a hollow carbon rod, a preparation method and application thereof and a die head used in the preparation process. The hollow carbon rod is a cylindrical hollow carbon rod; thecylindrical hollow carbon rod is obtained through one-step molding. The internal hollow structure can ensure that the battery has sufficient free electrolyte; the hollow carbon rod is always in a fully infiltrated state; the difference of discharge capacities of the battery in different discharge postures can be obviously reduced; the hollow carbon rod has relatively high strength; battery assembly process, automation can be realized by using simple equipment in the process of loading the hollow carbon rod into the steel shell; in addition, no micro powder falls off on the diaphragm in the loading process, the risk of micro short circuit of the battery is reduced, the hollow carbon rod formed in one step is flat in end face and can be in flat contact with the upper diaphragm and the lowerdiaphragm of the battery, the phenomenon of falling off or uneven diaphragms cannot occur in the high negative pressure state in the vacuum liquid injection process, and the current collector is convenient to install.

Description

technical field [0001] The invention belongs to the field of batteries, and in particular relates to a hollow carbon rod, its preparation method, application and a die used in the preparation process. Background technique [0002] The specific energy of the lithium thionyl chloride battery reaches 680Wh / Kg, and the ambient temperature can be used normally from a low temperature of -60°C to a high temperature of 85°C. The service life exceeds ten years, and the average annual self-discharge rate is less than 1%. Emerging industries such as smart home, smart tracking, and smart security have a wide range of applications. [0003] With the rapid advancement of the construction of the Internet of Things, the concept of smart city is deeply rooted in the hearts of the people, and the application modes of batteries are becoming more and more diverse, which inevitably requires higher and higher battery performance. For example, the lithium thionyl chloride battery currently used i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/06H01M4/13H01M4/04H01M4/08B29C48/06B29B7/00B29K27/18B29L31/34H01M6/14
CPCH01M4/06H01M4/13H01M4/0433H01M4/08B29C48/06B29C48/0022B29B7/002H01M6/14B29K2027/18B29L2031/3468Y02E60/10
Inventor 邓辉辉曹浪祝媛孙佩玲王品高张俊刘金成
Owner EVE ENERGY CO LTD
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