A lithium ion power battery module

Abstract

The invention relates to a lithium-ion power battery module, which comprises a shell and several single lithium batteries of the same structure packaged in the shell, and each single lithium battery is electrically connected in series and parallel according to its thickness direction, and the shell is a An integrated box-type housing formed by die-casting aluminum and with an open upper end, the front side panel and the rear side panel are respectively provided with a water circulation channel and an air duct, and the upper end of the front side panel is also provided with a water inlet joint and a water outlet joint. A piece of heat-conducting silica gel is bonded to the front and rear surfaces of each single lithium battery, and the outer surfaces of the two pieces of heat-conducting silica gel are in close contact with the inner surfaces of the front side plate and the rear side plate respectively; A signal acquisition circuit board, a control output circuit board, an insulating top cover and a control board. The module adopts an integrated box-type housing, which not only simplifies the module structure, but also facilitates the assembly of the module, and has the advantages of dustproof, waterproof, safe and reliable use, etc.

Description

Technical field: [0001] The invention relates to a power battery for an electric vehicle, in particular to a lithium-ion power battery module with different voltages and capacities formed through series-parallel electrical connection. Background technique: [0002] With the continuous shortage of primary energy, countries all over the world have carried out research on electric vehicles. The idea is to use high-power lithium battery packs or modules as power systems to replace fuel engines in whole or in part. At present, the common lithium battery module uses an external circuit to connect multiple single lithium batteries arranged side by side in series and parallel, and then encapsulates them in a U-shaped seat. The aluminum radiator plates that are attached to the front and back of the battery are used for heat dissipation. The upper end cover of the U-shaped seat is combined with a top cover, and the signal acquisition circuit board, control output circuit board and co...

AI Technical Summary

Problems solved by technology

This structure has the following disadvantages: First, the casing for encapsulating the lithium battery module adopts a split structure, which is not only complicated in structure, inconvenient to assemble, but also poor in sealing performance, and external dust and rainwater are easy to flow from the U-shaped seat to the connection between the cooling plate and the top cover. The gap enters the shell, affecting the normal operation of the lithium battery or the circuit boards in the shell; second, there is no insulation protection on the aluminum heat sink, and there is a hidden danger of leakage; third, the control board as the core control component of the lithium battery module is set on each single The upper end of the lithium battery is susceptible to electromagnetic interference and affects the stability of the control

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