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DC voltage reduction discharging and single-phase inversion discharging control circuit with adjustable battery pack serial structure and control method thereof

A discharge control, single-phase inverter technology, applied in battery circuit devices, circuits, secondary batteries, etc., can solve the problems of high application cost, complex circuit, large hardware volume, etc., to provide reliability and safety, control Simple, simple circuit effect

Pending Publication Date: 2018-10-19
李勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Both the current passive equalization and active equalization technologies have problems such as low efficiency and unsatisfactory practical application effects.
Especially the active equalization technology, including the capacitor fit method and the voltage conversion method, has defects such as extremely complex circuits, large hardware volume, and high application costs.

Method used

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  • DC voltage reduction discharging and single-phase inversion discharging control circuit with adjustable battery pack serial structure and control method thereof
  • DC voltage reduction discharging and single-phase inversion discharging control circuit with adjustable battery pack serial structure and control method thereof
  • DC voltage reduction discharging and single-phase inversion discharging control circuit with adjustable battery pack serial structure and control method thereof

Examples

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Embodiment Construction

[0036] The technical solution adopted in the present invention is to change the existing direct combination of single cells (or single cell groups) in series to form a battery pack, but to conduct on-off control through field effect tubes, relays or other switching devices, and to connect the single cells (or a single battery pack) is connected in series to the bus bar, and the battery pack voltage is obtained from the bus bar. On-off control can also be carried out through field effect tubes, relays or other switching devices, and the busbars of this level are connected, and the single cells (or single cell groups) are bypassed to form a series combination, and no discharge current is passed. By controlling the number of single cells (or single cell groups) for output discharge, the discharge voltage can be adjusted by DC step-down, or the single-phase inverter discharge can be realized through dynamic adjustment.

[0037] Each single battery (or single battery pack) in the b...

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PUM

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Abstract

The invention discloses a DC voltage reduction discharging and single-phase inversion discharging control circuit with an adjustable battery pack serial structure. According to the circuit, discharging control can be performed on each single battery (or single battery set) through a control current conduction path. Through controlling the number of single batteries (or single battery sets) which output discharged power, adjustable DC discharging voltage is realized, or dynamic adjustment is performed for realizing single-phase inversion discharging. The circuit can realize dynamic balancing capability which is same with magnitude of discharging current. Through dynamic controlling, sufficient discharging of each single battery (or single battery set) in the battery set can be realized.

Description

technical field [0001] The invention relates to the field of batteries. Background technique [0002] The rapid development of new energy technologies, especially the widespread application of lithium batteries in backup energy storage and electric vehicles, puts forward higher requirements for key battery energy storage and battery management technologies, and it is necessary to improve the effectiveness and balance of battery pack discharge , so that the energy storage characteristics of the battery pack can be maximized. [0003] In the application of the battery pack, in addition to the battery management system, an inverter circuit needs to be added to realize the inverter discharge. The system architecture is complex and the hardware cost is high. [0004] The battery pack technology has high requirements on the consistency of single cells, otherwise the battery consistency will seriously affect the overall performance of the battery pack. However, due to the limita...

Claims

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Application Information

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IPC IPC(8): H02J7/00H01M10/613H01M10/6568H01M10/48H01M10/42
CPCH01M10/425H01M10/486H01M10/613H01M10/6568H02J2207/20Y02E60/10
Inventor 李勇
Owner 李勇
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