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
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  • 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 e

Method used

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  • Sealed battery and manufacturing method therefor
  • Sealed battery and manufacturing method therefor
  • Sealed battery and manufacturing method therefor

Examples

Experimental program
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Effect test

Example Embodiment

[0097] [Example 2]

[0098] In the prismatic non-aqueous electrolyte secondary battery 10 of Example 1, it is shown as figure 2 and image 3 As shown, as the negative current collector 18 1 ,Use a protrusion 18 formed in the center 2 The current collector has an opening 23 formed in the center of the heat-fusible resin tape 23a 1 Instead, use the parallel resistance welding example. However, if the resistance welding is particularly continuous, the electrode rod 24 1 And 24 2 Since it becomes hot, during resistance welding, the heat-fusible resin tape 23a itself may be softened before the current flows. If resistance welding is carried out in this state, during resistance welding, use electrode rods 24 from both sides 1 And 24 2 Press the negative current collector 18 1 And negative current collector support member 18 3 , At the same time, resistance welding is carried out, so as Figure 5 As shown, the heat-fusible resin tape 23a itself may protrude toward the welded portion sid...

Example Embodiment

[0103] [Example 3]

[0104] In Example 1 and Example 2, the example in which the heat-fusible resin tape 23a was used as an insulating sealing material was shown, but the insulating tape with a paste material can also be used. use Figure 8 ~ Figure 10 A description will be given of the structure of the resistance welded portion of the prismatic battery of Example 3 using the insulating tape 23b with paste material as an insulating sealing material. Also, in Figure 8 ~ Figure 10 In, and Figure 6 and Figure 7 Parts with the same structure shown are denoted by the same reference signs, and detailed descriptions thereof are omitted.

[0105] The structure of the resistance welded portion of Example 3 is different from that of Example 2 in that the structure of the resistance welded portion of Example 2 is different. That is, in Example 2, a thermally fusible resin tape 23a is used as an insulating sealing material. In contrast, In Example 3, the insulating tape 23b with the paste ma...

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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

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Application Information

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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
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