Lithium battery system replacing lead-acid electric vehicle battery system and manufacturing method thereof

Abstract

The invention relates to a lithium battery system replacing a lead-acid electric vehicle battery system and a manufacturing method thereof, including a battery pack shell, a battery module, a bracket, a BMS and electrical components, wherein the battery pack shell includes an upper shell and a lower shell, The upper case and the lower case can be closed and connected; the battery module is composed of lithium batteries connected in series and parallel, which are fixed on the lower case of the battery pack through a bracket; the BMS is installed on the bracket; design position. The manufacturing method includes the following steps: (1) processing the shell of the battery pack and the internal bracket; (2) assembling lithium batteries in series and parallel into a module by using connecting cables and connecting copper bars; (3) lowering the shell of the discharged battery pack of the module, And install the bracket to fix it; (4) Install the relevant electrical components to the design of the battery case; (5) Install the BMS on the bracket; (6) Close the upper case of the battery pack. The replacement scheme of the present invention can reduce the use of lead-acid batteries and reduce the risk of environmental pollution; since lithium batteries are used to replace lead-acid batteries, a low-temperature charging and heating system is added to improve the low-temperature discharge capacity and low-temperature charging performance of the battery system.

Description

technical field [0001] The invention relates to an electric vehicle battery system, in particular to a lithium battery system replacing a lead-acid electric vehicle battery system and a manufacturing method thereof. Background technique [0002] Since 2006, my country has replaced Japan to become the world's second largest consumer market for new cars after the United States. In 2030, it will surpass the United States and rank first. Chinese consumers have a huge demand for cars, and for a long time to come, my country's auto market will continue to maintain the fastest growing trend in the world. In 2030, my country will need to import nearly 1 billion tons of oil to provide automobile fuel. my country's energy issues have become a strategic issue for national economic development. From the perspective of national security, oil resources have been closely linked with national security. The stable supply of energy resources It has always been the focus of a country, especia...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a lithium battery system to replace the layout of the lead-acid battery system to solve the problem of low specific energy of the lead-acid battery, short mileage on one charge, short service life, poor low temperature performance, difficult use and recycling, environmental pollution, etc. shortcoming

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