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Laminated pole-piece lithium-ion battery

A lithium-ion battery and lamination technology, applied in secondary batteries, non-aqueous electrolyte battery electrodes, circuits, etc., can solve the problems of lithium battery zero electricity, scrapping, high zero electricity in batches, etc., and achieve the reduction of battery zero electricity The effect of chance

Active Publication Date: 2012-01-18
SHENZHEN GREPOW BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the prior art, since the laminated lithium-ion battery is multi-body internal parallel connection, as long as one separator penetrates a

Method used

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  • Laminated pole-piece lithium-ion battery
  • Laminated pole-piece lithium-ion battery
  • Laminated pole-piece lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] figure 2 This embodiment is a schematic front view structure diagram of a pole piece for a laminated lithium ion battery. The pole piece can be a positive pole piece or a negative pole piece. see figure 2 As shown, the shape of the pole piece of this embodiment is as follows:

[0058] A tab welding protrusion 201 is provided on the top of the pole piece. On the pole piece, the outer edge corner closest to the tab welding protrusion 201 is an arc transition portion 202 . The arc transition portion 202 It is tangent to the extension line of the top lateral edge 204 of the pole piece, and the arc transition portion 202 is also tangent to the longitudinal edge 203 of the pole piece.

[0059] In application, the radius of the arc transition portion 202 may be set to at least 0.5 mm according to actual application requirements. Make the arc transition part 202 have a larger radius (that is, more parts are cut off at the corner), and make the arc transition part 202 rela...

Embodiment 2

[0066] image 3 It is a schematic structural diagram of a front view of a laminated lithium-ion battery provided in this embodiment (the positive electrode plate 300 at the front end);

[0067] Figure 4 A schematic top-view structure diagram of a laminated lithium-ion battery provided in this embodiment ( Figure 4 The middle part 000 of the laminated battery is omitted);

[0068] Figure 5 The left-view structural schematic diagram of a laminated lithium-ion battery provided in this embodiment ( Figure 5 The middle part 000 of the laminated battery is omitted).

[0069] see Figure 3-5 As shown, the laminated lithium ion battery of this embodiment includes a laminated positive electrode sheet 300 , a separator 303 , and a negative electrode sheet 400 .

[0070] These diced positive electrode sheets 300 , negative electrode sheets 400 and separators 303 are stacked together. During stacking, each positive electrode sheet 300 and negative electrode sheet 400 are separa...

Embodiment 3

[0089] Figure 9 The rear view of a laminated lithium ion battery provided in this embodiment (the lamination at the rearmost end of the laminated lithium ion battery is the negative electrode plate 901) is a schematic structural diagram,

[0090] Figure 10 The front view of a laminated lithium ion battery provided in this embodiment (the lamination at the front end of the laminated lithium ion battery is the positive electrode sheet 1001) is a schematic structural diagram,

[0091] Figure 11 This is a schematic top-view structural diagram of a laminated lithium ion battery provided in this embodiment, and the middle part 000 of the laminated battery is omitted.

[0092] Figure 12 This embodiment is a schematic left view of the structure of a laminated lithium ion battery, and the middle part 000 of the laminated battery is omitted.

[0093] see Figure 9-12 As shown, this embodiment is a combination of Embodiments 1 and 2, that is, in this embodiment:

[0094] On all...

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PUM

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Abstract

The invention relates to the field of lithium-ion batteries, and discloses a laminated pole-piece lithium-ion battery. The laminated pole-piece lithium-ion battery comprises positive pole pieces, diaphragms, negative pole pieces, positive lugs and negative lugs arranged in a pile. The diaphragm is arranged between the positive pole piece and the negative pole piece. Each one of the positive pole pieces and the negative pole pieces is provided with a lug welding protrusion. Each one of the positive lugs and the negative lugs are welded on the corresponding lug welding protrusion. On the positive pole pieces and the negative pole pieces, corners of outer edges of the lug welding protrusion closest to the corresponding positive pole pieces and the negative pole pieces are circular arc transition parts. The circular arc transition parts are tangent to top traverse edges and longitudinal edges of the positive pole pieces. The top traverse edges are located at bottoms of the lug welding protrusions. Peaks of the circular arc transition parts are at least 3 millimeters lower than the diaphragms. The peak of the circular arc transition part is an intersection point of the circular arc transition part and a straight line between the centre of the circular arc transition part and an intersection point of the top traverse edge and a longitudinal edge extension line. The laminated pole-piece lithium-ion battery is beneficial for reducing probability of zero current scrap caused by internal short-circuiting of a laminated lithium-ion battery.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to pole pieces and laminated lithium ion batteries. Background technique [0002] Lithium-ion batteries are mainly divided into wound lithium-ion batteries and laminated lithium-ion batteries according to the manufacturing process of the batteries. The lamination process of laminated lithium-ion batteries is mainly: cutting the positive and negative electrodes into multiple small pieces, and then stacking these positive and negative electrodes with the separator, so that the separator can be spaced between the positive and negative electrodes. [0003] The lamination manufacturing processes in the prior art mainly include three types: bag-making, z-shaped, and winding-type laminations. Among them, the bag-making lamination is generally packaged in a bag made of a diaphragm for the positive electrode, and the negative electrode is sequentially sealed. stack. The z-shaped lamina...

Claims

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Application Information

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IPC IPC(8): H01M10/0585H01M4/13
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 何安轩胡远升张继锋张艳萍
Owner SHENZHEN GREPOW BATTERY CO LTD