Cylindrical battery cell module

Abstract

The invention relates to a cylindrical battery cell module. The cylindrical battery cell module comprises a battery pack formed by combining a plurality of cylindrical battery cells arranged in an array manner, two electrode assemblies and a top cover; the two electrode assemblies are arranged in parallel, and are respectively positioned at the positive electrode end and the negative electrode endof the battery pack, a plurality of battery cell fixing grooves are arranged at one side, close to the battery pack, of every electrode assembly, the positive electrode ends and the negative electrode ends of the cylindrical battery cells are positioned in the battery cell fixing grooves, and the two electrode assemblies are fixedly connected through a connecting piece; and two sides of the top cover are respectively connected with the two electrode assemblies. The plurality of small-capacity cylindrical battery cells are connected in parallel to form the large-capacity battery pack, and thebattery pack is wrapped with the two electrode assemblies to form the cylindrical battery cell module, so the cylindrical battery cell module has the advantages of simple structure, safety and reliability in connection, good protection, short development period, and meeting of the large-capacity requirements of electric automobiles; and a plurality of cylindrical battery cell modules can be connected in a mutual insertion manner to form a module group having the advantages of difficulty in making mistakes of connection, convenience in routing, reliability in connection, and good resistance toshock and impact.

Description

technical field [0001] The invention relates to the field of automobile energy, in particular to a cylindrical cell module. Background technique [0002] At present, the global automobile industry is facing the huge challenge of energy and environmental issues; pure electric vehicles with high energy utilization rate and no pollution to the environment are increasingly becoming the development direction of the future automobile industry. As the core component of a pure electric vehicle, the performance of a power battery will directly affect the performance of a pure electric vehicle. In order to meet the cruising range of electric vehicles, the power battery system is required to have a large capacity, so it is necessary to connect multiple small-capacity cylindrical lithium-ion batteries in parallel to form a large-capacity battery module. Most of the traditional modules connect the connecting piece and the battery together by bolts, or weld the connecting piece and the b...

AI Technical Summary

Problems solved by technology

These two connection methods are not designed with a buffer. During use, the connection strength and structure will be affected due to vibration and thermal expansion and contraction, which will cause the connection resistance to increase and cause the temperature of the connection to rise. A series of security and reliability issues

There is no positive and negative bus plate insulation protection in the traditional cylindrical module, which is easy to cause short circuit during handling and storage

There is no permanent and obvious positive and negative pole marking in the traditional cylindrical module, and it is easy to cause the positive and negative poles to be wrongly connected during use

When the traditional cylindrical cell module is composed of multiple strings, there is no anti-error feature for reverse polarity

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