Method for manufacturing Closed cell
A manufacturing method and airtight technology, applied in the direction of secondary batteries, battery pack parts, final product manufacturing, etc., can solve problems such as electrolyte deterioration, poor transportation, and failure to solve problems.
Inactive Publication Date: 2007-04-11
ENVISION AESC ENERGY DEVICES LTD
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Therefore, if the sealing sheet cannot be attached to the liquid injection port correctly, there is a problem of poor sealing.
Although methods such as temporarily fixing the sealing sheet or adjusting the irradiation direction of the laser light during sealing have been proposed, the problems caused by sealing with the sealing sheet have not yet been solved.
In particular, small batteries have a small electrolyte injection port and a small sealing sheet. In the automatic transportation of small sealing sheets such as pins and balls, poor transportation is likely to occur. It is necessary to confirm whether the sealing sheet is correctly installed in the electrolyte. Injection port procedure
[0009] In addition, during battery manufacturing, after the power generating elements and the like are accommodated in the battery box, the electrolyte is filled, and then a cover body with external terminals and the like is placed on the opening of the battery box, and a method of sealing by laser welding is also considered, but in reality Such a method cannot be implemented in
This is due to the following reasons. It must be considered that when the entire opening of the battery box is sealed by laser welding, a large amount of heat will be generated to degrade the electrolyte, and the risk of air holes will be generated due to the attached electrolyte. In the case of a fixed position, the laser irradiates the inside of the battery box, and if a flammable substance is used for the electrolyte, there is a risk of fire, etc.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0075] On the opening of the upper part of the battery box, which is composed of a long side of 29 mm and a short side of 4.8 mm, a top cover with an electrode lead-out terminal is installed to form a gap of 70 μm on the long side and 55 μm on the short side, and then as shown in Figure 8 It shows the production of the cover body, where a=0.02mm and b=3mm are formed in the gap part, and the c area is reserved, and the battery box with the gap part is made by laser welding and sealing.
[0076] Then, in the unit liquid injection tank with an internal size of 50 mm wide, 42 mm high, and 12 mm thick, and the bottom is provided with a deep 0.8 mm electrode lead-out terminal accommodation part, inject diethyl carbonate (DEC), ethylene carbonate (EC ) and lithium hexafluorophosphate (LiPF 6 ) of 3.1 grams of electrolyte solution, put the gap part of the battery box toward the bottom surface, install it in the liquid injection chamber, exhaust the liquid injection chamber, and when t...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
PURPOSE: Provided are a sealed type battery obtained by supplying a solution of an electrolyte solution without installing an exclusive solution supplying port, and an its manufacturing method. CONSTITUTION: The sealed type battery(1) comprises a cap body(4) which is mounted on an opening part of battery can and seals the opening part by welding. In the battery, an opening part is sealed when a gap part is formed on a part of meeting part between surroundings of the cap body(4) and the opening part of the battery can(2). The opening part of the gap part(11) is sealed after the electrolyte solution is supplied from the gap part(11). The sealed type battery(1) uses nonaqueous electrolyte solution as the electrolyte solution.
Description
technical field [0001] The present invention relates to a sealed battery which is sealed by welding a lid arranged at the opening of the battery box, and more particularly to a sealed battery characterized by electrolyte injection and a method for manufacturing the same. Background technique [0002] Among the sealed batteries, there are known batteries in which a cover is attached to the opening of the battery case with a seal ring and sealed integrally with the battery case by riveting, or a battery in which a cover is placed at the opening of the battery case and then sealed by laser welding or the like is known. type battery. [0003] As a sealed battery used as a power source of a small electronic device or the like, a square-shaped sealed battery capable of effectively utilizing a battery storage space is widely used. [0004] For example, in a rectangular lithium-ion battery for small electronic devices, a positive electrode and a negative electrode manufactured by c...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/08H01M2/36H01M10/38H01M2/04
CPCY02E60/10Y02P70/50
Inventor 泷本清秀花房博至
Owner ENVISION AESC ENERGY DEVICES LTD