The invention relates to a
lithium battery system capable of replacing a lead-acid
electric vehicle battery system and a manufacturing method thereof. The
lithium battery system comprises a
battery pack shell, a battery module, a support, a battery
management system (BMS) and electric parts, wherein the
battery pack shell comprises an upper shell and a lower shell, and the upper shell and the lower shell are connected in a closable manner; the battery module is assembled and formed by connecting
lithium batteries in a series-parallel manner, and is fixed to the lower
battery pack shell through the support; the BMS is mounted on the support; and the electric parts are mounted at corresponding design positions of the battery pack shell. The manufacturing method comprises the following steps: (1)
processing the battery pack shell and the internal support; (2) connecting the lithium batteries in the series-parallel manner to assemble and form the module by using connecting cables and connecting
copper bars; (3) putting the module into the lower battery pack shell, and mounting the support to fix the module; (4) mounting the related electric parts at the design positions of the battery shell; (5) mounting the BMS on the support; and (6) closing the upper battery pack shell. Through the replacement scheme, the usage of lead-acid batteries can be reduced, and the risks of environmental
pollution are reduced; the lithium batteries are used for replacing the lead-acid batteries, and a low-temperature charging
heating system is added, so that the low-temperature
discharge capacity and the low-temperature charge performance of the battery
system are improved.