A distributed lithium battery pack energy storage system

A technology of lithium battery pack and energy storage system, which is applied in the direction of vehicle energy storage, battery circuit device, arrangement of multiple synchronous batteries, etc., can solve the problems of low battery reliability and energy utilization rate, etc. The effect of high efficiency and extended battery life

Active Publication Date: 2021-09-21
重庆宏一电气有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the above technologies, the present invention provides a distributed lithium battery pack energy storage system, which solves the technical problems of low battery reliability and energy utilization in the lithium battery pack energy storage system in the prior art

Method used

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  • A distributed lithium battery pack energy storage system
  • A distributed lithium battery pack energy storage system
  • A distributed lithium battery pack energy storage system

Examples

Experimental program
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Embodiment Construction

[0047] refer to figure 1 As shown, a distributed lithium battery pack energy storage system includes several energy storage control units for parallel connection to the DC bus; the energy storage control units share data through bus communication (such as CAN bus).

[0048] refer to figure 2 As shown, the energy storage control unit includes a battery pack composed of a single lithium battery, a bidirectional DC converter, a microcontroller, and a status monitoring module for collecting the status monitoring data of the energy storage control unit; the battery pack passes through the bidirectional DC converter Obtain electric energy from the DC bus or output electric energy to the DC bus. The microcontroller switches the charging / discharging mode of the energy storage control unit by controlling the bidirectional DC converter; the microcontroller controls the bidirectional DC converter through the duty ratio to realize the control of the charging / discharging mode, which is t...

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Abstract

The invention discloses a distributed lithium battery group energy storage system, which includes several energy storage control units for parallel connection to a DC bus; data sharing is performed between the energy storage control units through bus communication; the energy storage control unit includes a single A battery pack composed of a bulk lithium battery, a bidirectional DC converter, a microcontroller and a state monitoring module; each microcontroller is equipped with an independent charging control program, which is used to Status monitoring data and DC bus voltage U A Determine the charging mode of the corresponding energy storage control unit; each microcontroller is equipped with a coordinated discharge control program, and the coordinated discharge control program is used according to the shared data and the DC bus voltage U A Determine the overall discharge pattern. The invention solves the technical problem of low reliability and energy utilization rate of the lithium battery in the lithium battery group energy storage system in the prior art, can prolong the service life of the lithium battery, and reduce the cost.

Description

technical field [0001] The invention belongs to the field of lithium battery energy storage. Background technique [0002] With the increasing depletion of global fossil energy and the impact of factors such as the environment and climate, electric vehicles, as the main body of new energy vehicles, have achieved unprecedented development. Power battery is one of the core components of electric vehicles, and its performance and safety issues have become the key factors restricting the development of electric vehicles. Power batteries for electric vehicles represented by lithium-ion batteries have many advantages such as high energy density, light weight, low self-discharge rate, and long service life. They are currently the most practical energy storage method for electric vehicles. [0003] At present, the voltage and capacity of single lithium batteries are relatively small, and multiple single lithium batteries are usually connected in series and parallel to meet the appl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H02H7/18H02J7/34H02J1/10H02J1/14B60L58/22
CPCB60L58/22H02H7/18H02J1/10H02J1/14H02J7/0019H02J7/34Y02T10/70Y02T10/92
Inventor 章治国杜海忠骆滔易嘉欣李山
Owner 重庆宏一电气有限公司
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