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A stacked lithium-ion battery pole core and a battery including the pole core

A lithium-ion battery, laminated technology, applied in the direction of secondary batteries, battery pack components, circuits, etc., can solve the problems of increasing the design complexity of the battery system, disadvantageous batteries, misconnection or accidental short circuit, etc. The risk of misconnection or short circuit of positive and negative poles, the effect of reducing internal resistance and simplifying the PACK process

Active Publication Date: 2022-01-25
SUZHOU YOULION BATTERY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A battery with multiple positive and negative pole structures requires an external circuit to separate the positive and negative poles, which increases the complexity of the battery system design; It is more prone to misconnection or accidental short circuit accidents, which is not conducive to the later battery pack

Method used

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  • A stacked lithium-ion battery pole core and a battery including the pole core
  • A stacked lithium-ion battery pole core and a battery including the pole core
  • A stacked lithium-ion battery pole core and a battery including the pole core

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Embodiment 1: The battery pole core is composed of an active unit 1, a positive balance plate 21 and a negative balance plate 22, and the structure is as follows Figure 4-Figure 6 As shown, in order to simplify the description, the diaphragm, battery case and insulating sheet in the figure are omitted. The positive pole piece 111 is 560 mm long and 70 mm wide, including a square base 11 coated with lithium iron phosphate active material on both sides and two tabs extending from the square base 11. The square base 11 is 500 mm long and 70 mm wide. The length is 30mm, the width is 25mm, and the pole lug 2 is 15mm long and 25mm wide. The square substrate 11 is an aluminum foil with a thickness of 15 microns, and the coating surface density of lithium iron phosphate is 40 mg / cm 2 The negative pole piece 112 is 570mm long and 72mm wide, including a square substrate 11 coated with graphite active material on both sides and two tabs extending from the square substrate 11, the ...

Embodiment 2

[0043] Embodiment 2: The battery pole core is composed of an active unit 1, a positive balance plate 21 and a negative balance plate 22, and the structure is as follows Figure 7-Figure 9 As shown, in order to simplify the description, the diaphragm, battery case and insulating sheet in the figure are omitted. The positive pole piece 111 is 560 mm long and 70 mm wide, including a square base 11 coated with lithium iron phosphate active material on both sides and two tabs extending from the square base 11. The square base 11 is 500 mm long and 70 mm wide. The length is 30mm, the width is 25mm, and the pole lug 2 is 15mm long and 25mm wide. The square substrate 11 is an aluminum foil with a thickness of 15 microns, and the coating surface density of lithium iron phosphate is 40 mg / cm 2 The negative pole piece 112 is 570mm long and 72mm wide, including a square substrate 11 coated with graphite active material on both sides and two tabs extending from the square substrate 11, th...

Embodiment 3

[0044] Embodiment 3: The battery pole core is composed of an active unit 1, a positive balance plate 21 and a negative balance plate 22, and the structure is as follows Figure 10-Figure 12 As shown, in order to simplify the description, the diaphragm, battery case and insulating sheet in the figure are omitted. The positive pole piece 111 is 560 mm long and 70 mm wide, including a square base 11 coated with lithium iron phosphate active material on both sides and two tabs extending from the square base 11. The square base 11 is 500 mm long and 70 mm wide. The length is 30mm, the width is 25mm, and the pole lug 2 is 15mm long and 25mm wide. The square substrate 11 is an aluminum foil with a thickness of 15 microns, and the coating surface density of lithium iron phosphate is 40 mg / cm 2 The negative pole piece 112 is 570mm long and 72mm wide, including a square substrate 11 coated with graphite active material on both sides and two tabs extending from the square substrate 11, ...

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PUM

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Abstract

The invention discloses a laminated lithium-ion battery pole core and a battery including the pole core, belonging to the technical field of lithium-ion batteries, including an active unit and a balance plate. The cells are stacked and arranged to form a battery pole core. The active unit is a laminated structure and is formed by stacking a square base and a separator. The square base includes a positive pole piece and a negative pole piece, and the square base extends outward. At least two positive pole tabs, and the positive pole tabs are distributed on different sides of the square base body, and the square base body is extended outwards with at least two negative pole tabs, and the negative pole tabs are distributed on the on different sides of the square base. The invention uses the electrode balance plate to realize the separate confluence of the positive and negative tabs in the battery case, further reduces the internal resistance and only leads out the only positive pole and the only negative pole, which simplifies the later PACK process of the battery and reduces the positive and negative risk of misconnection or short circuit.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a laminated lithium ion battery pole core and a battery including the pole core. Background technique [0002] With the large-scale application of lithium-ion batteries in new energy vehicles, energy storage power stations, etc., the demand for power battery systems is growing on a large scale. Increasing the size and capacity of a single battery can reduce the number of batteries required by the battery system, thus simplifying the assembly process of the battery system. The large size of a single battery has become the development trend of the industry, such as the cylindrical battery from 18650 to 21700, and then to the 4680 size proposed by Tesla, such as long square and large pouch batteries. [0003] The path of current in a large-sized battery becomes longer, and the internal resistance of the battery increases, causing rate problems and heat gen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0585H01M10/0525H01M50/54H01M50/528
CPCY02E60/10Y02P70/50
Inventor 毛焕宇刘贯东尚随军吴刚徐晓磊
Owner SUZHOU YOULION BATTERY INC