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Battery packs and vehicles

A battery pack, battery technology, applied in the direction of batteries, electric vehicles, vehicle components, etc., can solve the problems of insufficient clamping force of battery cells and inability to completely fix them, so as to ensure dynamic performance, increase connection strength, and reduce safety. effect of risk

Active Publication Date: 2020-09-04
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the battery module vibrates, the battery cells in the middle of the battery module are likely to be unable to be fully fixed due to insufficient clamping force, causing safety risks

Method used

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  • Battery packs and vehicles
  • Battery packs and vehicles
  • Battery packs and vehicles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] Embodiment 1 can be prepared according to the following steps:

[0117] (i) Mix the positive electrode active material NCM523, the conductive agent acetylene black, and the binder PVDF at a mass ratio of 96:2:2, add the solvent NMP, and stir until the system is uniform under the action of a vacuum mixer to obtain the positive electrode slurry; The positive electrode slurry is uniformly coated on the aluminum foil, dried at room temperature, transferred to an oven for further drying, and then subjected to cold pressing, slitting, and cutting to obtain the first electrode sheet 111a.

[0118] (ii) Mix the negative electrode active material graphite or graphite and other active materials in different mass ratios, conductive agent acetylene black, thickener CMC, and binder SBR in a mass ratio of 96.4:1:1.2:1.4, add Solvent deionized water, stirred under the action of a vacuum mixer until the system is uniform, to obtain the negative electrode slurry; evenly coat the negativ...

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PUM

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Abstract

The invention provides a battery pack and a vehicle. The battery pack includes a battery module, a case assembly, and a first bonding member. The box assembly has an accommodating cavity, and the battery module is located in the accommodating cavity of the box assembly. The battery module includes a plurality of first batteries arranged in sequence along the horizontal direction, and the first batteries include an electrode assembly and a casing. The electrode assembly is accommodated in the casing, and the electrode assembly includes a first pole piece, a second pole piece and a diaphragm arranged between the first pole piece and the second pole piece. The electrode assembly has a wound structure and is flat, and the electrode assembly includes two flat surfaces, and the two flat surfaces face each other along a vertical direction. The case assembly has a connecting portion located on one side of the battery module along the vertical direction. The outer surface of the housing includes a first surface close to the connection part, and the first adhesive member connects the first surface and the connection part. The area A of the first surface and the elastic modulus B of the first bonding member satisfy the relational expression: 0.02cm 2 / MPa≤A / B≤9cm 2 / MPa.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a battery pack and a vehicle. Background technique [0002] Secondary batteries have the advantages of high energy density, long service life, energy saving and environmental protection, and are widely used in different fields such as new energy vehicles and energy storage power stations. [0003] A battery pack usually includes a case assembly and a battery module accommodated in the case assembly, and the battery module includes a plurality of battery cells arranged in sequence. In the prior art, the battery module fixes multiple battery cells by setting end plates and side plates, and the end plates are fixed on the box assembly by bolts, but the battery cells of the battery module are not connected to the box assembly, so The rigidity of the battery module as a whole is low. When the battery module vibrates, the battery cells in the middle of the battery module are likely to be una...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/10B60L50/64H01M50/103H01M50/209H01M50/224H01M50/249
CPCH01M10/0431H01M50/209B60L50/64H01M50/103H01M50/224H01M50/249H01M2220/20H01M10/0459H01M10/0525H01M10/0587Y02E60/10Y02T10/70Y02P70/50H01M50/124
Inventor 史东洋金海族杨瑞胡飞王鹏曾毓群林永寿
Owner CONTEMPORARY AMPEREX TECH CO
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