Microvast Power Systems Co., Ltd.

Guoyou Deng

Yang Wu

Feng Guo

Xiaofeng Yin

Cunkui Yin

Xiaojie Shen

A winding type battery cell includes a roll core and at least one electrode sheet unit. The roll core includes a positive connection part, a negative connection part and an insulation part located between the positive connection part and the negative connection part. The positive connection part and the negative connection part are respectively connected with two ends of the insulation part. The electrode sheet unit includes a positive electrode sheet, a negative electrode sheet and a separator. The positive electrode sheet and the negative electrode sheet are separated by the separator. The positive electrode sheet is connected with the positive connection part, and the negative electrode sheet is connected with the negative connection part. The winding type battery cell is formed by winding the electrode sheet unit around the roll core. A winding battery with the winding type battery cell is also provided.

Winding type battery cell and winding battery

The present invention provides a battery module, comprising a battery cell and a current collector sheet, the battery cell is provided with a positive electrode tab and a negative electrode tab, the positive electrode tab and the negative electrode tab are located at the opposite ends of the battery cell, the adjacent battery cells form a Z-type arrangement through the current collector sheet by putting the tabs in series, the said positive electrode tab of the battery cell is an aluminum foil tab or a copper foil tab, the negative electrode tab is a copper foil tab or an aluminum foil tab, and the material of the positive electrode tab and that of the negative electrode tab are not the same, the said current collector sheet is a combined current collector sheet, the current collector sheet is combined by an aluminum sheet and a copper sheet.

Laminated lithium battery module

The present invention provides a battery module and a liquid-cooled battery system that uses it, a battery cell and a current collector sheet, on the premise that the materials like the electrode and separator and so on are completely the same, energy density of the battery pack is greatly increased; the cell and the current collector sheet are fully welded connections, the joints are fewer and it is not prone to produce desoldering, also ensuring the stability of the of the cell tab and high current carrying capacity, and when putting the parallel battery module in series, the use of wires are avoided, thus reduces the volume of the battery pack; the innovative design for the liquid-cooled battery pack system, improves the thermal balance between the cells, and the heat-dissipation in battery pack distributes more evenly, the insulation property of the battery package is highly improved, controlling the heat-dissipation capacity of the system by adjusting the flow rate of the circulating pump, not only the unnecessary energy consumption can be avoided, but also have a better impact resistance.

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Huzhou, China

Guoyou Deng