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Multi-lug cell, multi-terminal battery, battery module and preparation method thereof

A battery module and multi-tab technology, which is applied in the field of multi-tab cells, battery modules and their preparation, and multi-terminal batteries, can solve problems such as potential safety hazards and rapid battery temperature rise, and achieve enhanced overcurrent capability and reduced Internal resistance, enhanced heat dissipation effect

Pending Publication Date: 2018-09-28
JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to meet the needs of consumers, electric vehicles have to design the chassis to be relatively low, and the single battery cell needs to be matched with the electric vehicle chassis, and the design is usually flatter and flatter. The conventional lithium-ion power battery cells in the prior art The thickness of the cell is between 10mm and 60mm, and when the volume of the single cell increases and the thickness of the cell decreases, the length and width of the cell will increase relatively, resulting in the current density passing through the pole piece when the cell is working. Larger and larger, so the battery heats up relatively quickly during work, which is likely to cause safety hazards

Method used

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  • Multi-lug cell, multi-terminal battery, battery module and preparation method thereof
  • Multi-lug cell, multi-terminal battery, battery module and preparation method thereof
  • Multi-lug cell, multi-terminal battery, battery module and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Such as Figure 1~3 As shown, a multi-tab battery cell includes a battery cell 3 formed by winding a positive electrode sheet 1, a diaphragm and a negative electrode sheet 2. Several corresponding positive electrode ears 11 are arranged on both sides of the positive electrode sheet 1, and two negative electrode sheets 2 are provided. There are several corresponding negative tabs 21 on the side; the positive tabs 11 on both sides of the positive sheet 1 are wound to form the positive tabs 11' on both sides of the cell 3; the negative tabs 21 on both sides of the negative sheet 2 are wound The negative tabs 21 ′ on both sides of the battery cell 3 are formed.

[0047] Preferably, the thickness of the positive tab 11 is 3-20 μm, and the thickness of the negative tab 21 is 3-20 μm.

[0048] Preferably, the thickness of the positive electrode sheet 1 is 30-100 μm, and the thickness of the negative electrode sheet 2 is 50-150 μm.

[0049] Preferably, the thickness of the ba...

Embodiment 2

[0052] Such as Figure 3-5 As shown, the difference from Example 1 is that this implementation includes a battery cell 3 formed by laminating the positive electrode sheet 1, the separator and the negative electrode sheet 2. Several corresponding positive electrode ears 11 are arranged on both sides of the positive electrode sheet 1, and the negative electrode There are several corresponding negative tabs 21 on both sides of the sheet 2; the positive tabs 11 on both sides of the positive sheet 1 are laminated to form the positive tabs 11' on both sides of the cell 3; the negative tabs 21 on both sides of the negative sheet 2 are The negative tabs 21 ′ on both sides of the battery core 3 are formed after lamination.

[0053] Other structures are the same as those in Embodiment 1, and will not be repeated here.

Embodiment 3

[0063] Such as Figure 6~7 As shown, a multi-terminal battery includes a battery cell 3, a housing 4 for containing the battery cell 3, and a cover plate 5 arranged at both ends of the housing 4. The cover plate 5 includes a first cover plate 51 and a second cover plate 52, the first cover plate 51 and the second cover plate 52. Both the cover plate 51 and the second cover plate 52 are provided with an explosion-proof valve 53, and both the first cover plate 51 and the second cover plate 52 are provided with at least one positive terminal 54 and at least one negative terminal 55, the positive terminal 54 is connected to the cell 3 The positive tab set 11 ′ is electrically connected to the positive tab set 11 ′, and the negative terminal 55 is electrically connected to the negative tab set 21 ′ of the cell 3 .

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Abstract

The invention belongs to the technical field of power batteries, in particular to a multi-lug cell. The multi-lug cell comprises a cell formed by winding or stacking a positive plate, a diaphragm anda negative plate, a plurality of corresponding positive lugs are arranged on two sides of the positive plate, and a plurality of corresponding negative lugs are arranged on two sides of the negative plate; positive lug groups on two sides of the cell are formed after the positive lugs on two sides of the positive plate are wound or stacked; and negative lug groups on two sides of the cell are formed after the negative lugs on two sides of the negative plates are wound or stacked. The lugs are arranged on two sides, and the lug groups are formed after the lugs are wound or stacked, so that theinternal resistance of the cell is reduced, the discharge capacity of the cell is strengthened, simultaneously, the thickness of the cell is further reduced, the heat dissipation capacity of the battery is improved, and the safety of the battery is strengthened. Moreover, the invention also discloses a multi-terminal battery, a battery module and a preparation method thereof.

Description

technical field [0001] The invention belongs to the technical field of power batteries, and in particular relates to a multi-tab battery cell, a multi-terminal battery, a battery module and a preparation method thereof. Background technique [0002] As a new generation of green high-performance batteries, lithium-ion power batteries have been widely used in electronic equipment and electric vehicle industries. With the continuous improvement of electric vehicle technology and the continuous promotion of the electric vehicle industry, people's requirements for electric vehicles are also increasing. The higher the battery life, especially the battery life of electric vehicles, the main factor affecting the battery life of electric vehicles is the energy density of lithium-ion power battery packs in electric vehicles. Therefore, it is very important to increase the energy density of electric vehicle power batteries. Under the condition that the chemical system used in the batte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/26H01M2/30H01M10/04H01M10/0525H01M10/058H01M50/538H01M50/543
CPCH01M10/0409H01M10/0431H01M10/0525H01M10/058H01M2220/20H01M50/543H01M50/531Y02E60/10Y02P70/50
Inventor 姜斌龙绘锦
Owner JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
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