Multi-connected single lithium battery pack packaging technology

Abstract

The invention relates to a multi-connected single lithium battery pack packaging technology, which is composed of a module housing, a multi-connected single lithium battery basic unit and a multi-layer circuit board, wherein the multi-connected single lithium battery basic unit is composed of a double-layer lithium electric core shell, cylindrical lithium electric cores and an aluminum-plastic film; a multi-connected single battery inner shell is punched with cooling liquid inlet and outlet holes and cylindrical lithium electric core shells arranged in a grid manner and then nested and sealedwith a multi-connected single battery outer shell to form he double-layer lithium electric core shell, the shells are injected with a cooling liquid therebetween to serve as a cooling liquid circulation pipeline; the lithium electric cores are installed in the punched cylindrical lithium electric core shells, the openings of the lithium batteries are packaged by the aluminum-plastic film, and thealuminum-plastic film further plays a role of a lithium battery safety valve; the module housing provides an installation space and insulation isolation for the multi-connected single lithium batterybasic unit; and the multi-layer circuit board is installed on the modular multi-connected single lithium battery basic unit and performs series-parallel connection on the battery pack, the top layer of the circuit board is integrated with an BMS management circuit, and the bottom layer is integrated with a temperature sensor.

Description

Technical field: [0001] The invention relates to power lithium battery packaging and battery pack series-parallel technology, which can be used in the design of power battery packs. Background technique: [0002] Lithium battery cells usually adopt a variety of packaging forms, such as cylindrical lithium cells, aluminum-plastic film soft-packed cells, and square hard-shell cells, etc., and the sizes of the cells produced are also different. When lithium batteries using these packaging methods are used in the design of power battery packs, it often brings many difficulties to the design, such as the design of multiple cells in series and parallel, the thermal management of the battery pack, the safety of collision deformation, and the safety of single cells. Thermal runaway prevention, etc. Moreover, the cost, specific energy density, cycle life and safety of battery packs designed with these types of packaging methods are still difficult to meet the requirements of electri...

AI Technical Summary

Problems solved by technology

When lithium batteries using these packaging methods are used in the design of power battery packs, it often brings many difficulties to the design, such as the design of multiple cells in series and parallel, the thermal management of the battery pack, the safety of collision deformation, and the safety of single cells. Thermal runaway prevention, etc.

Moreover, the cost, specific energy density, cycle life and safety of battery packs designed with these types of packaging methods are still difficult to meet the requirements of electric vehicles for mileage and safety.

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