Improved liquid cooling battery box

Abstract

The invention relates to the technical field of batteries, in particular to an improved liquid cooling battery box. The improved liquid cooling battery box comprises a box body, a battery module arranged in the box body, and a covering plate arranged on the surface of the box body to seal the battery module. The battery module comprises a plurality of single batteries connected in series. Each group of the single batteries comprises a plurality of cells connected in series. The single batteries and the cells are provided with connecting pieces for series connection. The covering plate is provided with anti-shock strips for pressing corresponding to each group of the single batteries. Thermal conduction flat tubes are arranged outside each group of single batteries in an encircling mode. Confluence tubes communicate with the thermal conduction flat tubes end to end. The covering plate is fixedly provided with an inlet pipe body and an outlet pipe body which respectively communicate withthe collecting pipes at the head and tail positions. According to heat transfer characteristics of the multilayer-laminated single batteries, a technical scheme for effectively conducting heat conduction with a shell of a polar plate edge-cutting end-face single battery is provided. Rationality and lasting stability of the pre-tightening force of connecting bolts between the serial and parallel connecting pieces and pole columns of the single batteries are provided based on reasons for the difference in contact resistance between series and parallel contacts.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to an improved liquid-cooled battery box. Background technique [0002] The battery module is a battery pack formed by connecting multiple power battery cells in series or in parallel, so that the whole can meet the power demand of the product. Today, my country has the world's largest power battery industry. Power lithium battery packs are the core components of new energy vehicles, and their performance is undoubtedly the key to the healthy development of the new energy vehicle industry. Since electric vehicles need high voltage to drive various components in the vehicle, hundreds or even thousands of single cells need to be connected in series and parallel to form a battery pack to meet the power supply requirements of electric vehicles. Among the currently commonly used battery types, lithium-ion batteries are used in new energy vehicles because of their advantages such as hi...

AI Technical Summary

Problems solved by technology

[0003] The existing lithium battery packs still have the following problems in actual use: low energy density, uneven temperature control, poor rigidity of the box cover, seal failure, inconvenient disassembly, serious vibration and momentum transmission between cells, cooling and heat conduction The effect is poor, and various problems interact and superimpose, which directly lead to the problem of unstable use

Images