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Battery cell connecting plate for battery module as well as preparation method and application of battery cell connecting plate

A battery module and connection board technology, applied in battery pack parts, circuits, electrical components, etc., can solve the problems of low aluminum row density, high copper density, unfavorable module lightweight, etc., and achieve the effect of improving performance

Pending Publication Date: 2021-08-03
HUBEI JINQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Copper has good electrical and thermal conductivity, but the density of copper itself is high, and the use of copper bars is not conducive to the lightweight of the module;
[0004] 2. The traditional aluminum row itself has low density and good ductility, but the thermal conductivity and electrical conductivity of the aluminum row are only 59.1% and 64.8% of the copper row, and the use of aluminum row will reduce the performance of the module

Method used

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  • Battery cell connecting plate for battery module as well as preparation method and application of battery cell connecting plate
  • Battery cell connecting plate for battery module as well as preparation method and application of battery cell connecting plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] This embodiment provides a cell connecting plate for a battery module and a preparation method thereof, the preparation method comprising the following steps:

[0076] S1 powder mixing: weigh the graphene and add it into absolute ethanol, add 200ml of absolute ethanol for every 1g of graphene, ultrasonically oscillate at an ultrasonic frequency of 60KHz for 20min, then let stand for 10min, add aluminum powder (particle size D50 is 15 μm), the mass ratio of aluminum powder to graphene is 199:1, and ultrasonic vibration is performed for 90 minutes at an ultrasonic frequency of 60KHz to obtain a composite material;

[0077] S2 Vacuum drying: Put the composite material obtained after powder mixing in a vacuum drying oven for vacuum drying, set the temperature at 120°C, the vacuum degree at -0.06MPa, and set the time at 2h. After vacuum drying, the residual alcohol is evaporated at the same time It can prevent the powder from being oxidized again during the drying process; ...

Embodiment 2

[0084] This embodiment provides a cell connecting plate for a battery module and a preparation method thereof, the preparation method comprising the following steps:

[0085] S1 powder mixing: weigh the graphene and add it into absolute ethanol, add 200ml of absolute ethanol for every 1g of graphene, ultrasonically oscillate at an ultrasonic frequency of 60KHz for 20min, then let stand for 10min, add aluminum powder (particle size D50 is 15 μm), the mass ratio of aluminum powder to graphene is 99:1, and ultrasonic vibration is performed at an ultrasonic frequency of 60KHz for 90min to obtain a composite material;

[0086] S2 Vacuum drying: Put the composite material obtained after powder mixing in a vacuum drying oven for vacuum drying, set the temperature at 120°C, the vacuum degree at -0.06MPa, and set the time at 2h;

[0087] S3 Vacuum ball milling: Vacuum ball mill the dried composite powder, set the rotation speed to 200rpm, set the ball milling time to 2h, and set the va...

Embodiment 3

[0093] This embodiment provides a cell connecting plate for a battery module and a preparation method thereof, the preparation method comprising the following steps:

[0094]S1 powder mixing: weigh the graphene and add it into absolute ethanol, add 200ml of absolute ethanol for every 1g of graphene, ultrasonically oscillate at an ultrasonic frequency of 60KHz for 20min, then let stand for 10min, add aluminum powder (particle size D50 is 15 μm), the mass ratio of aluminum powder and graphene is 197:3, ultrasonic vibration 90min under the ultrasonic frequency of 60KHz, obtains composite material;

[0095] S2 Vacuum drying: Put the composite material obtained after powder mixing in a vacuum drying oven for vacuum drying, set the temperature at 120°C, the vacuum degree at -0.06MPa, and set the time at 2h;

[0096] S3 Vacuum ball milling: Vacuum ball mill the dried composite powder, set the rotation speed to 200rpm, set the ball milling time to 2h, and set the vacuum degree to -0.0...

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Abstract

The invention discloses a battery cell connecting plate for a battery module as well as a preparation method and application of the battery cell connecting plate. The battery cell connecting plate comprises a metal matrix and graphene dispersed in the metal matrix. According to the battery cell connecting piece, the graphene plays a superconducting role, the heat conductivity coefficient and the conductivity of the battery cell connecting piece can be improved by adding a small amount of graphene, the strength can be improved, the lightweight requirement of the battery cell connecting piece can be met, the battery cell connecting plate is used for connection of battery cells in a battery module, the performance of the module can be improved, and the battery cell connecting plate is of great significance to the development of light-weight battery modules.

Description

technical field [0001] The invention belongs to the technical field of batteries, and relates to a battery cell connection plate for a battery module, a preparation method and application thereof. Background technique [0002] In the new energy vehicle industry, the driving of electric vehicles generally requires power batteries to provide energy, and power batteries generally consist of multiple modules. The connection between the battery cells in the module is a key point in the module design, and the material and performance of the battery connection plate directly determine the performance of the entire module. At present, two materials are mainly used for the connection of the battery cells in the power battery; copper bars and aluminum bars, but the traditional connection materials have their own advantages and disadvantages: [0003] 1. Copper has good electrical and thermal conductivity, but the density of copper itself is high, and the use of copper bars is not con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/522H01B1/02
CPCH01B1/02
Inventor 那昊波陈朝海
Owner HUBEI JINQUAN NEW MATERIALS CO LTD
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