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Energy storage system and battery module charging and discharging power dynamic control method

A technology of charging and discharging power and battery modules, which is applied in the direction of secondary battery charging/discharging, battery over-discharge protection, battery overcharge protection, etc., and can solve problems such as poor consistency of battery cells, affecting battery performance and lifespan, etc.

Active Publication Date: 2021-05-07
东莞市新瑞能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the charging / discharging power of the battery module is in the states of 0, x, x / 2, x / 3, x / 4, etc., in the long run, the consistency of the cells between the modules will inevitably become worse and worse, which will affect the stability of the battery. performance and life

Method used

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  • Energy storage system and battery module charging and discharging power dynamic control method
  • Energy storage system and battery module charging and discharging power dynamic control method

Examples

Experimental program
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Embodiment 1

[0036] Such as Figure 1~2 As shown, this embodiment provides an energy storage system, including a battery system 1 and a power supply device 2. The battery system 1 includes a first battery module 11 and several second battery modules 12. The first battery module 11 and the power supply device 2. Through signal connection, several second battery modules 12 are arranged in parallel with the first battery module 11 respectively, and several second battery modules 12 are connected to the first battery module 11 through signal;

[0037]Several second battery modules 12 upload allowable charge and discharge power requests to the first battery module 11 respectively, and the first battery module 11 accumulates the allowable charge and discharge power requests of several second battery modules 12 and the allowable charge and discharge power requests of the first battery module 11. The allowable charge and discharge power request is uploaded to the power supply device 2 after obtain...

Embodiment 2

[0046] This embodiment provides a method for dynamically controlling the charging and discharging power of the battery module of the energy storage system described in Embodiment 1, including the following operations:

[0047] Set the charging power request allowed by the battery module to x, and the allowed discharge power request to y, calculated as (x,y);

[0048] 1) Set the first battery module 11 as the host, allowing charging and discharging power request (x a ,y a ),

[0049] The second battery module 12 is set as a slave, and the quantity of the second battery module 12 is 3, and the allowable charge and discharge power requests are respectively (x b ,y b ), (x c ,y c ) and (x d ,y d );

[0050] 2) 3 parallel second battery modules 12 send a request for charging and discharging power (x b ,y b ), (x c ,y c ) and (x d ,y d );

[0051] 3) The first battery module 11 accumulates the allowable charging and discharging power requests (x b ,y b ), (x c ,y ...

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Abstract

The invention provides an energy storage system which comprises a power supply device and a battery system, the battery system comprises a first battery module and a plurality of second battery modules, the first battery module is in signal connection with the power supply device, the plurality of second battery modules are connected with the first battery module in parallel, the plurality of second battery modules are connected with the first battery module through signals; the plurality of second battery modules respectively upload allowable charging and discharging power requests to the first battery module, and the first battery module accumulates the allowable charging and discharging power requests of the plurality of second battery modules and the allowable charging and discharging power requests of the first battery module to obtain a total allowable charging and discharging power request of the battery system and then uploads the total allowable charging and discharging power request to the power supply device; and the power supply device dynamically controls the charging and discharging power of the first battery module and the second battery modules according to the total allowable charging and discharging power request of the battery system. According to the invention, the allowable charging and discharging power request of the battery is dynamically changed through the number and working state of the parallel battery modules, and the operation condition of the modular battery module is optimized.

Description

technical field [0001] The invention belongs to the technical field of battery energy storage equipment communication, and in particular relates to an energy storage system and a method for dynamically controlling charging and discharging power of a battery module. Background technique [0002] At present, in some energy storage systems, the battery modules adopt a modular design, and the capacity of the battery is increased by connecting the modules in parallel to meet the power demand of the system. The battery modules are connected in parallel and then connected to the power supply. The charging and discharging of the battery module is controlled by the power supply equipment. Each battery module has a technical specification limit for charging and discharging power. If the charging and discharging power exceeds the technical specification requirements of the battery for a long time, the life of the battery will decrease, and the module will be abnormally scrapped. At t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/34H02J7/00H01M10/44
CPCH02J7/34H02J7/0013H02J7/00302H02J7/00306H01M10/441Y02E60/10
Inventor 孔秋杰张志颖缪李良王吉平
Owner 东莞市新瑞能源技术有限公司