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Secondary battery system having a plurality of batteries and distribution method of charging and discharging power, etc.

A technology of charging and discharging power, distribution method, applied in secondary battery charging/discharging, arrangement of multiple synchronous batteries, secondary battery, etc.

Active Publication Date: 2018-05-25
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a system composed of a plurality of batteries, there is a problem of how to allocate command values ​​such as charge and discharge power for the entire power storage system to individual batteries as constituent elements.

Method used

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  • Secondary battery system having a plurality of batteries and distribution method of charging and discharging power, etc.
  • Secondary battery system having a plurality of batteries and distribution method of charging and discharging power, etc.
  • Secondary battery system having a plurality of batteries and distribution method of charging and discharging power, etc.

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Embodiment Construction

[0026] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings.

[0027] (Structure of secondary battery system)

[0028] figure 1 The structure of a secondary battery system according to an embodiment of the present invention is shown in FIG.

[0029] The secondary battery system 10 includes: a battery controller 1 for distributing charge and discharge power to each battery; multiple (for example, 30) PCS2-1 to 2-30, connected to each battery and charge and discharge the battery; And a plurality of (for example, 30) batteries 3-1 to 3-30 are arranged corresponding to the PCS2-1 to 2-30 in a 1:1 manner and can be charged and discharged. In this secondary battery system 10, various batteries 3-1 to 3-30 are respectively connected to the DC (direct current) side of their corresponding PCS2-1 to 2-30, and PCS2-1 to 2- The AC (alternating current) side of 30 is all connected in parallel and connected to the power system 4. In ad...

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Abstract

The present invention provides a secondary battery system having a plurality of batteries, which can contribute to prolonging the life of each battery and improving the charging and discharging (energy) efficiency of the system as a whole. The secondary battery system (10) has: multiple batteries (3‑1~3‑30), which can be independently charged and discharged; multiple PCSs (2‑1~2‑30), respectively connected to the batteries and The battery is charged and discharged; and the battery controller (1) distributes the overall charging and discharging power value of the system to each PCS (2-1-2-30) at a fixed cycle or at any timing. The battery controller (1) includes: a priority order calculation unit that evaluates the plurality of batteries (3-1 to 3-30) at each time point based on the SOC-related degradation characteristics of each battery (3-1 to 3-30). assigning a priority order; and an allocation ratio determination unit allocating the charging and discharging power value to the PCS (2-1 to 2-30) according to the priority order.

Description

Technical field [0001] Embodiments of the present invention relate to a secondary battery system having a plurality of batteries that can be individually controlled for charge and discharge, and a method for distributing charge and discharge power or current (hereinafter referred to as charge and discharge power, etc.) using the secondary battery system . Background technique [0002] For applications such as suppression of fluctuations in power generation using natural energy sources such as sunlight and wind, suppression of fluctuations in power demand, or peak shift (Peak Shift), the application of large-scale storage systems based on secondary batteries is expected. In order to construct such a large-scale power storage system, a number of batteries (sub-battery systems: hereinafter referred to as "batteries") capable of individually controlling charge and discharge power, etc., are combined and applied. In such a system composed of a plurality of batteries, there is a probl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H01M10/44H01M10/48H02J7/02
CPCH01M10/48H01M10/441H02J7/0019H02J7/00714Y02E60/10H02J7/0013H02J7/0048H02J7/005H02J7/02H02J5/00Y02B40/00Y02E60/13
Inventor 户原正博鲛田芳富水谷麻美远藤保
Owner KK TOSHIBA
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