Lithium ion power battery module

Abstract

The invention relates to a lithium ion power battery module. The lithium ion power battery module comprises a shell and a plurality of single lithium batteries having a same structure and packaged in the shell, all the single lithium batteries are electrically connected in series and parallel along a thickness direction, the shell is an integrated box type shell formed thorugh the die casting molding of aluminum and having an open upper end, a water circulating channel and an air channel are respectively arranged in a front side board and a rear side board of the shell, an upper end of the front side board is provided with a water inlet joint and a water outlet joint, front and rear surfaces of all the single lithium batteries are respectively bonded with a sheet type heat conductive silica gel, and external surfaces of the sheet type heat conductive silica gels respectively closely contact with inner surfaces of the front side board and the rear side board; and the module also comprises a signal acquisition circuit board, a control output circuit board, an insulation top cover and a control board. The module adopting the integrated box type shell has the advantages of simplified structure, convenient assembling, dust resistance, water resistance, safe and reliable use, and the like.

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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