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Power management system

A power management system and power technology, applied in circuits, current collectors, electric vehicles, etc., can solve problems such as differences in the characteristics of multiple battery packs, and achieve the effect of preventing overcharging and overdischarging

Inactive Publication Date: 2013-05-01
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In this way, when multiple battery packs are used, even if the usage environment is the same, the individual differences of the battery packs will appear during repeated charge and discharge cycles, and the characteristics of multiple battery packs may vary.

Method used

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Embodiment Construction

[0036] Embodiments of the present invention will be described below based on the drawings.

[0037] 1. Basic structure of the system

[0038] First, the basic configuration of the power management system in this embodiment will be described.

[0039] figure 1 A diagram showing the overall configuration of the power management system in this embodiment. The power management system includes: an external commercial power source 10, a solar cell (solar power generation system) 12 as a power source, a power storage device 14, a switch SWa (first switch) 18, SWb (second switch) 28, and a power conditioner. 24 and AC / DC converter 26.

[0040] The power storage device 14 includes a power storage unit 16 , a power system switching circuit 20 , and a power management unit 22 .

[0041] Power storage unit 16 is composed of a plurality of battery packs, each of which is composed of a plurality of single cells. A single battery is constituted by a lithium ion secondary battery. The c...

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PUM

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Abstract

A power management system is disclosed, and the power management system carries out a charge-discharge control according to lack of storage cell pack characteristic uniformity. A power storage device (14) comprises a power storage unit (16), a power system switching circuit (20), and a power management unit (22). The power management unit (22): acquires charge information (for example, charge rate SOC) on each of a plurality of storage cell packs contained in the power storage unit; compares the size of said charge information according to the minimum and maximum values thereof respectively with an upper bound and a lower bound, and switches a charge switch and a discharge switch of the power system switching circuit (20); and transitions the power storage unit (16) between a charge-discharge state, a charge state, and a discharge state.

Description

technical field [0001] The invention relates to a power management system, in particular to a system for controlling charging and discharging of storage batteries. Background technique [0002] In power management, it is preferable to perform power generation or power supply according to the power consumption of the load. The following Patent Document 1 discloses a power supply system as a network system including a plurality of solar power systems connected to communication lines, and an information source device that measures weather information such as the amount of sunlight and transmits it to the solar power system. [0003] On the other hand, in order to store electric power generated by solar power generation and respond to fluctuating load power consumption, a power storage device composed of a lithium ion battery or the like is used. The following patent document 2 discloses the following content, that is, as a lithium ion battery management device, the charge and ...

Claims

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Application Information

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IPC IPC(8): H02J7/00H01M10/44H01M10/48H02J7/02H02J7/35
CPCY02E60/12H01M10/482H02J7/35H02J7/007H01M10/42H02J7/042H02J1/10H02J7/0031H02J1/14H01M10/441Y02E60/10H02J7/04
Inventor 阿部孝义中岛武池部早人八木康宏
Owner SANYO ELECTRIC CO LTD
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