Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Sealed battery and manufacturing method therefor

A manufacturing method and a sealed technology, applied in the direction of battery pack parts, final product manufacturing, sustainable manufacturing/processing, etc., can solve problems such as a large amount of welding energy, and achieve good efficiency, high reliability, and firm efficiency

Active Publication Date: 2008-12-31
SANYO ELECTRIC CO LTD
View PDF4 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, especially in electrode bodies of sealed batteries for EV and HEV (refer to the above-mentioned Patent Document 4) having exposed portions of the positive electrode core and the negative electrode core at both ends, the resistance on the core made of copper or copper alloy When welding copper current collectors, a large amount of welding energy is required for reliable welding due to the large number of stacked electrode bodies.
In addition, when the welding energy is increased during resistance welding, the generation of sputtered fine dust increases, and the dust moves into the electrode body of the sealed battery, which increases the possibility of causing an internal short circuit.

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sealed battery and manufacturing method therefor
  • Sealed battery and manufacturing method therefor
  • Sealed battery and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0098] In the prismatic nonaqueous electrolyte secondary battery 10 of Example 1, as shown figure 2 and image 3 As shown, as the negative electrode current collector 18 1 , using a protrusion 18 formed in the central part 2 The current collector, the opening 23 is formed in the central part of the heat-welding resin tape 23a 1 while using and resistance welding examples. However, if especially continuous resistance welding, the electrode rod 24 1 and 24 2 Since it becomes hot, the heat-welding resin tape 23a itself may soften before electric current flows during resistance welding. If resistance welding is performed in such a state, during resistance welding, the electrode rod 24 is used from both sides. 1 and 24 2 Press negative electrode current collector 18 1 and negative electrode current collector supporting member 18 3 , meanwhile, resistance welding is performed, so, as Figure 5 As shown, the heat-welding resin tape 23a itself may protrude toward the welded...

Embodiment 3

[0104] In Example 1 and Example 2, an example was shown in which the heat-welding resin tape 23a was used as the insulating sealing material, but an insulating tape with a paste material may also be used. use Figure 8 ~ Figure 10 , the structure of the resistance welded part of the rectangular battery of Example 3 using the insulating tape 23b with the paste material as the insulating sealing material will be described. Also, in Figure 8 ~ Figure 10 in, with Figure 6 and Figure 7 The same reference numerals are assigned to the same components in the shown configurations, and detailed description thereof will be omitted.

[0105] The structure of the resistance welded part of Example 3 is different from that of the resistance welded part of Example 2 as follows. That is, in Example 2, the heat-welding resin tape 23a is used as the insulating sealing material. In contrast, Only the point that the insulating tape 23b with a paste material is used in Embodiment 3, other st...

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

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention provides a manufacturing method for a sealed battery includes: a process whereby a sealed battery application electrode assembly 11 is formed that has multiple positive electrode substrate exposed portions 14 at one end and multiple negative electrode substrate exposed portions 15 at the other end; a process whereby the negative electrode collector 181 and negative electrode collector receiving part 183 are brought against both surfaces of the part to be welded on at least the negative electrode substrate exposed portions 15, with tape 23a constituted of thermo deposited resin and having an opening 231 in the center being interposed; and a process whereby resistance welding is effected by passing current between the negative electrode collector 181 and negative electrode collector receiving part 183 positioned at the two sides.

Description

technical field [0001] The present invention relates to a sealed battery and a manufacturing method thereof, in particular to preventing sputtering when resistance welding a current collector on a core body in an electrode body of a sealed battery having exposed portions of a positive core body and a negative pole core body at both ends. A highly reliable sealed battery and a method for manufacturing the same, in which fine dust moves to the inside of an electrode body and reduces the occurrence of internal short circuits. Background technique [0002] In the automotive field, not only vehicles using fossil fuels such as gasoline, diesel, and natural gas, but also electric vehicles (EV) and hybrid electric vehicles (HEV) are being actively developed. In addition, the rapid increase in the price of fossil fuels in recent years has been a driving force for promoting the development of these EVs and HEVs. [0003] Nickel-hydrogen secondary batteries or lithium ion secondary ba...

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
no application Login to View More
IPC IPC(8): H01M2/22H01M2/08H01M50/528
CPCY02E60/10Y02P70/50
Inventor 南坂健二谷口恭朋山内康弘能间俊之稻垣健次吉田贤司近藤卓
Owner SANYO ELECTRIC CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com