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Columnar power battery and assembly method thereof

A power battery and cylindrical technology, which is applied in the field of cylindrical power batteries and their assembly, can solve the problems of complex production process and low safety of lithium-ion batteries, and achieve high safety, high success rate and suitable for mass production Effect

Pending Publication Date: 2018-01-12
广州云通锂电池股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a cylindrical power battery and its assembly method, the main technical problem to be solved is that the safety of lithium-ion batteries is not high, and the production process is complicated

Method used

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  • Columnar power battery and assembly method thereof
  • Columnar power battery and assembly method thereof
  • Columnar power battery and assembly method thereof

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Experimental program
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Embodiment 1

[0050] Such as figure 1 As shown, an embodiment of the present invention proposes a cylindrical power battery, which includes: a power battery post 10 and a fuse post 20 .

[0051] The first end of the power battery column 10 has a power supply positive pole 11, the second end of the power battery column 10 has a first connection negative pole 12, and the first end of the power battery column 10 is opposite to the second end of the power battery column 10 . The power battery column can be a lithium ion cylindrical battery, or a lithium metal cylindrical battery, etc.

[0052] The fuse post 20 includes an insulating sheath 21, a fuse metal 22 located in the insulating sheath 21, a power supply negative metal sheet 23 covering the opening of the first end of the insulating sheath 22, and the insulating sheath The second end of 21 is connected to the second end of the power battery column 10, the first end of the fuse fuse metal 22 is electrically connected to the negative elec...

Embodiment 2

[0065] Embodiment 2 of the present invention provides a method for assembling a cylindrical power battery in Embodiment 1 above, including the following steps:

[0066] Welding the second conductive metal segment of the fuse fuse metal in the original state to the first connection negative electrode of the power battery column;

[0067] Covering the insulating sheath on the original state of the fusing fuse;

[0068] Welding the negative electrode metal sheet of the power supply on the first conductive metal segment of the fuse fuse metal in the original state;

[0069] Pressing the negative metal sheet of the power supply against the opening at the first end of the insulating sheath;

[0070] The power battery column and the fuse fuse column are packaged through the plastic envelope, so that the protective sleeve is wrapped on the outer wall of the power battery column and the insulating sheath, and the first annular limiting ring covers On the end surface of the first end ...

Embodiment 3

[0073] Such as Figure 9 As shown, a cylindrical power battery provided by Embodiment 3 of the present invention includes: a power battery post 10a and a fuse post 20a.

[0074] The first end of the power battery column 10a has a power supply positive pole 11a, and the second end of the power battery column 10a has a first connection negative pole 12a, and the first end of the power battery column is opposite to the second end of the power battery column. The power battery column can be a lithium-ion cylindrical battery, or a lithium metal cylindrical battery.

[0075]The fuse fuse post 20a includes an insulating sheath 21a, a fuse fuse metal 22a located in the insulating sheath, a negative power supply metal sheet 23a covered on the opening of the first end of the insulating sheath, and the first end of the insulating sheath Two ends are docked with the second end of the power battery column, the first end of the fuse fuse metal is electrically connected to the negative meta...

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Abstract

The invention relates to a columnar power battery and an assembly method of the power battery and relates to the technical field of battery safety protection. The power battery and the method mainly solve the technical problems of low safety and a complicated production technology of a lithium ion battery. The columnar power battery is mainly characterized by comprising a power battery column anda fuse column, wherein a power supply anode is arranged at a first end of the power battery column; a first connecting cathode is arranged at a second end of the power battery column; the fuse columncomprises an insulating sheath, a fuse metal located in the insulating sheath, and a power supply cathode metal sheet covering an opening at a first end of the insulating sheath; a second end of the insulating sheath is in butt joint with the second end of the power battery column; a first end of the fuse metal is electrically connected with the power supply cathode metal sheet; and a second end of the fuse metal is electrically connected with the first connecting cathode directly or indirectly. Compared with the prior art, current output by the power battery column can be cut off, and the battery is higher in safety. At the same time, the battery is simple in technology and suitable for mass production.

Description

technical field [0001] The invention relates to the technical field of battery safety protection, in particular to a cylindrical power battery and an assembly method thereof. Background technique [0002] Lithium-ion batteries have high energy density, and can provide a long power supply time under the same volume, and are widely used in various scenarios. [0003] At the same time, due to the high energy density of lithium-ion batteries, after a short-circuit occurs in the lithium-ion battery, the current rises, which is very likely to cause the lithium-ion battery to burn out and cause a huge explosion, which is harmful to the surrounding personal safety and Property security poses a greater threat. Therefore, the commonly used protection measure is to set a PTC protection circuit in the lithium-ion battery circuit. [0004] For larger lithium-ion batteries, the PTC protection circuit can be placed on the side of the lithium-ion battery, and for smaller cylindrical lithi...

Claims

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Application Information

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IPC IPC(8): H01M2/30H01M2/34H01M50/543H01M50/572
CPCY02E60/10
Inventor 詹炳然
Owner 广州云通锂电池股份有限公司