Lead acid and lithium battery mixed energy storage system and control method thereof

A technology of an energy storage system and a control method, which can be used in systems for storing electrical energy, battery load switching, battery circuit devices, etc., and can solve problems such as internal resistance battery circulating voltage difference

Pending Publication Date: 2022-06-07
岳阳耀宁新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention mainly solves the problems of circulating current, bias current and voltage difference between different internal resistance batteries in the case of mixed use of new and old batteries in communication base stations; provides a mixed-use energy storage system of lead-acid and lithium batteries and its control method

Method used

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  • Lead acid and lithium battery mixed energy storage system and control method thereof
  • Lead acid and lithium battery mixed energy storage system and control method thereof

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Embodiment 1

[0037] In this embodiment, a lead-acid and lithium battery mixed energy storage system and a control method thereof are used. The system is used for a communication base station system containing lead-acid batteries. In this embodiment, the original lines of the base station are modified, such as figure 2 As shown in the figure, a new and old battery mixed energy storage system is added, and the lead-acid is connected to the battery access port of the intelligent control box with two 150A channel ports, and the long-cycle lithium battery system is connected to the battery access port. The switching power supply and the intelligent control box are connected through the RS485 protocol, and the switching power supply and the intelligent control box realize information exchange. details as follows:

[0038] The hybrid energy storage system with old and new batteries is composed of an intelligent control box, a lithium battery system, and a lead-acid battery system. The lithium ba...

Embodiment 2

[0062] The energy storage system of this embodiment is also applicable to secondary lithium batteries. It is only necessary to replace the lead-acid battery with a secondary lithium battery and hang it at the access port of the original lead-acid battery. The switching power supply and the intelligent control box are linked together to increase the edge gateway. The edge gateway acts as the brain of the entire energy storage system, and realizes the issuance of instructions, the modification of parameters for peak shaving and valley filling, and data uploading and reading. The special interface for lead-acid battery is cancelled, and the lead-acid battery is hung on the busbar of the switching power supply and controlled by an intelligent circuit breaker. The circuit breaker of the intelligent circuit breaker is in a normally open state, and the lead-acid battery is usually in a static state. The intelligent circuit breaker has a time control function, and the switch is turned...

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Abstract

The invention discloses a lead acid and lithium battery mixed energy storage system and a control method thereof. The problems of circulating current, bias current, voltage difference and the like among batteries with different internal resistances under the condition that new and old batteries of a communication base station are mixed are solved. The control method adopted by the invention comprises the following steps: the switching power supply detects whether the mains supply is normal and sends detection information to the intelligent control box; the intelligent control box receives the detection information, sets a peak clipping and valley filling operation strategy according to a local peak and valley time period, and selects a corresponding mode for processing; and supplying power to the load according to the selected mode, and charging and discharging the system. The system has the advantages that battery packs with different use degrees, different capacities and different brands can work together through independent management of a single charging and discharging channel; the intelligent control box modifies a peak clipping and valley filling strategy on line, and millisecond-level response power grid dispatching is achieved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a lead-acid and lithium battery mixed energy storage system and a control method thereof. Background technique [0002] With the application of lithium iron phosphate lithium batteries and retired lithium batteries in communication base stations, operators are faced with the mixed use of old and new batteries under different conditions, especially the mixed use of traditional lead-acid. When the performance of the old and new batteries is inconsistent, a circulating current and a bias current are generated between the battery packs. The battery with a small internal resistance bears a large current, and the battery with a large internal resistance bears a small current. As a result, the capacity of the battery with a small internal resistance is rapidly attenuated and the battery life is shortened. . [0003] For example, a "dispatching management system for an energy storage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J15/00H02J3/32H02J9/06H02J7/00
CPCH02J15/00H02J3/32H02J9/06H02J7/0068Y02E60/10
Inventor 蔡海龙孙胜前李鹏黄相博
Owner 岳阳耀宁新能源科技有限公司
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