A battery system, an electric vehicle with the battery system, and an energy storage system

Abstract

The invention discloses a battery system, which includes multiple power supply circuits arranged in parallel, each power supply circuit has several battery packs connected in series, and each power supply circuit is configured to be able to supply power to electric equipment or Cut off the power supply to the electrical equipment. An electric vehicle has the battery system, especially a power lithium battery system, or other types of rechargeable secondary battery systems. The battery system of the present invention can also be applied to various energy storage systems. The invention effectively solves the problems of the battery system in terms of reliability and safety, cooling and heating performance, battery protection and the like.

Description

technical field [0001] The invention relates to a battery system, an electric vehicle with the battery system and an energy storage system. Background technique [0002] Existing power lithium battery systems, energy storage systems, etc. are all single power supply circuit architectures, such as figure 1 As shown, it consists of a single independent battery pack. Its disadvantage is that the combustion of a certain battery will trigger the combustion of adjacent batteries, and a chain reaction will eventually cause the entire battery pack to burn. The combustion of a large number of batteries will become uncontrollable, resulting in extreme Great harm. Therefore, when a battery is overcharged or overdischarged, and the ambient temperature is lower or higher than the operating temperature range, the entire power supply circuit must be disconnected to avoid accidents. This protection reduces the efficiency of the battery system and also reduces mileage of the vehicle. Sing...

AI Technical Summary

Problems solved by technology

[0005] With the convection method with the external air, the battery pack cannot be waterproof, and the convection will accelerate the combustion of the batteries in the pack; with the closed liquid circulation method, the processing and installation of the serpentine tube components are difficult, occupying the internal space of the battery pack, and leakage cause a short circuit and cause a serious safety accident

Moreover, since the cooling system and the heating system of the existing battery system are two different subsystems, whether the cooling system adopts gas or liquid cooling, the volume of the battery pack will increase, the structure of the air duct or pipeline will be complicated, and the cooling low efficiency

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