Battery roll core and energy storage device

A battery roll and battery technology, which is applied in the field of energy storage, can solve problems such as damage, short circuit of positive and negative diaphragms, misalignment of positive and negative diaphragms, etc., and achieve the effect of reducing safety hazards and improving production efficiency

Pending Publication Date: 2020-02-07
SHENZHEN KAIFA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the energy density of lithium-ion batteries becomes higher and higher, the safety performance of lithium-ion batteries becomes worse
When the lithium battery is subjected to external abnormal stress (such as falling, impact, extrusion, etc.), the battery core will move up and down inside the packaging bag, that is, there will be severe friction between the battery core and the packaging bag, which will easily cause The separator is folded, stretched or damaged, and at the same time, it is easy to dislocate the positive and negative diaphragms, resulting in a short circuit between the positive and negative diaphragms

Method used

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  • Battery roll core and energy storage device
  • Battery roll core and energy storage device
  • Battery roll core and energy storage device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment provides a lithium-ion battery, and the lithium-ion battery includes a casing and a battery winding core built in the casing. Lithium-ion battery electrolyte is also injected into the casing.

[0025] The battery core consists of a strip-shaped first pole piece 1 (see figure 2 ) and strip-shaped composite sheet 2 (see image 3 ) formed by winding, the combined sheet 2 includes a strip-shaped strip 21 and a plurality of second pole pieces 22 whose polarities are opposite to those of the first pole piece 1, the strip The body 21 has a plurality of independent and equally spaced packaging spaces 211, and a plurality of the second pole pieces 22 are packaged in a plurality of the packaging spaces 211 in one-to-one correspondence (see figure 1 ). Specifically, the strip body 21 includes a strip-shaped first diaphragm 212 and a plurality of spaced linear second diaphragms 213 that are stacked and fixed on the first diaphragm 212, and the number of the seco...

Embodiment 2

[0031] This embodiment provides a supercapacitor, and the supercapacitor includes a casing and a battery winding core built in the casing. The casing is also injected with supercapacitor electrolyte.

[0032] The structure of the battery core can refer to the structure of the battery core in Embodiment 1, that is, refer to Figure 1-Figure 3, which is formed by winding a laminate composed of a strip-shaped first pole piece 1 and a strip-shaped composite sheet 2, and the composite sheet 2 includes a strip-shaped strip body 21 and a plurality of polarities connected with the The second pole piece 22 with the opposite polarity of the first pole piece 1, the strip body 21 has a plurality of independent and equally spaced packaging spaces 211, and a plurality of the second pole pieces 22 are packaged in multiple one-to-one correspondence. the encapsulation space 211. Specifically, the strip body 21 includes a strip-shaped first diaphragm 212 and a plurality of spaced linear secon...

Embodiment 3

[0037] This embodiment provides a lithium-ion hybrid capacitor, which includes a case and a battery winding core built in the case. The casing is also injected with lithium-ion hybrid capacitor electrolyte.

[0038] The structure of the battery core can refer to the structure of the battery core in Embodiment 1, that is, refer to Figure 1-Figure 3 , which is formed by winding a laminate composed of a strip-shaped first pole piece 1 and a strip-shaped composite sheet 2, and the composite sheet 2 includes a strip-shaped strip body 21 and a plurality of polarities connected with the The second pole piece 22 with the opposite polarity of the first pole piece 1, the strip body 21 has a plurality of independent and equally spaced packaging spaces 211, and a plurality of the second pole pieces 22 are packaged in multiple one-to-one correspondence. the encapsulation space 211. Specifically, the strip body 21 includes a strip-shaped first diaphragm 212 and a plurality of spaced line...

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Abstract

The invention discloses a battery roll core which is formed by winding a laminate composed of a strip-shaped first pole piece and a strip-shaped combination piece, wherein the combination piece comprises a strip-shaped strip body and a plurality of second pole pieces with the polarity opposite to that of the first pole piece, the strip body has a plurality of independently spaced packaging spaces,and the plurality of second pole pieces are packaged in the plurality of the packaging spaces in a one-to-one correspondence manner. In this way, after the first pole piece and the combination pieceare laminated and wound, misplacement between the first pole piece and the second pole pieces may not happen even if the relative position between the first pole piece and the combination piece changes, so that the battery roll core fundamentally solves the problem in the prior art that the positive and negative pole pieces of the battery roll core are easily misaligned, reduces safety risks, andcan greatly improve the production efficiency of the battery roll core with no need to spend time positioning the pole pieces and separators during the production process.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to a battery core and an energy storage device. Background technique [0002] New energy storage devices mainly include lithium-ion batteries, supercapacitors and hybrid capacitors, and their structures are mainly composed of winding cores, connectors and shells. Taking a lithium-ion battery as an example, it includes a battery core, which is mainly composed of a positive electrode diaphragm, a negative electrode diaphragm, and a separator, and is finally sealed with a packaging bag. However, as the energy density of lithium-ion batteries becomes higher and higher, the safety performance of lithium-ion batteries becomes worse. When the lithium battery is subjected to external abnormal stress (such as drop, impact, extrusion, etc.), the battery core will move up and down inside the packaging bag, that is, there will be severe friction between the battery core and the packagin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0587
CPCH01M10/0587Y02E60/10Y02P70/50
Inventor 伍伟冉红锋王蓓焦奇方张俭
Owner SHENZHEN KAIFA TECH
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