Dalian Rongkepower Co., Ltd

Chinese Academy of Sciences

Samsung Electronics Co., Ltd.

Huamin Zhang

Xiangkun Ma

Tao Zhang

Hongbo Wang

Xianfeng Li

Ting Chigan

Xi Han

Shenglin Liu

Ying Li

Honggui Zhao

Shan Jiang

Zhenkun Yang

Hongdong Jiang

Yang Huo

Yu Zhang

Yi Zou

Lecong Han

Xiaoli Wang

Xinliang Gao

Dan Sun

Kuanrong Yi

Jingbo Wu

Gang Liu

Hongzhang Zhang

You Wang

Duckyoung Yoo

Ting Xu

Cheng Bi

Ying Quan

Dingqin Shi

Yuanwei Ma

Jun Li

Hexiang Zhong

Hong Jin

Shanqiang Lv

Jiayun Shao

Haijun Zhao

Ning Chen

Congxin Xie

Chenhui Wang

Qinzhi Lai

Yuanhui Cheng

Hua Dai

Ruonan Liu

Zeqing Lin

Yelong Zhao

An electrode structure of a flow battery. A density of the vertical tow in the electrode fiber is larger than the density of the parallel tow. In the electrode fiber per unit volume, the quantity ratio of the vertical tow to the parallel tow is at least 6:4. The electrode structure includes an odd number of layers of the electrode fibers, and the porosity of other layers is larger than that of the center layer. The electrode structure includes the vertical tows, so that, the contact area between the outer surface of the electrode and the adjacent component is increased and the contact resistance is reduced; the electrode has good mechanical properties; the contact resistance of such structure is reduced by 30%-50%; and the layers of the electrode have different thickness depending on the porosity. After compression, the layers with optimized thickness have a consistent porosity.

Electrode structure including electrode fiber having higher density of vertical tows to parallel tows, flow battery stack including the same, and sealing structure including sealing gaskets connected by sealing wire

The present disclosure discloses a flow battery system and a large-scale flow battery energy storage device. The flow battery system comprises multiple flow batteries; each of the flow batteries comprises a battery pack A, a battery pack B, a battery pack C, and a set of electrolyte circulation system used by the battery pack A, the battery pack B and the battery pack C; the battery pack A, the battery pack B and the battery pack C comprised in each flow battery are independent of each other in the circuit. According to the present disclosure, at least two sets of electrolyte circulation system are saved under the same power scale, such that the system stability is improved while the cost is reduced.

Flow battery system and large scale flow battery energy storage device

The control method for a flow battery includes acquiring a current electrolyte capacity decay rate of the flow battery; comparing the current electrolyte capacity decay rate with a first preset decay rate and a second preset decay rate; when the current electrolyte capacity decay rate is greater than the first preset decay rate and less than the second preset decay rate, adjusting a liquid level of positive electrolyte and a liquid level of negative electrolyte, such that a difference between these two liquid levels is less than a preset value, a ratio of the total amount of vanadium in the positive electrolyte to the total amount of vanadium in the negative electrolyte remains in a first preset ratio range, or a ratio of a vanadium ion concentration in the positive electrolyte to a vanadium ion concentration in the negative electrolyte remains in a second preset ratio range.

Flow battery control method, flow battery control system and flow battery

A zinc iodine flow battery includes a positive end plate, a positive current collector, a negative current collector, a positive electrode with a flow frame, a membrane, a negative electrode with a flow frame, a negative end plate. The negative electrolyte is circulated between the negative storage tank and the negative cavity by pump. The negative pipe is provided with a branch pipe for the positive electrolyte circulation. The porous membrane between the positive and negative electrodes can realize the conduction of supporting electrolyte and prevent the diffusion of I3&#x2212; to the negative electrolyte. In a duel-flow battery system, same electrolyte serves as both the positive electrolyte and the negative electrolyte, which is a mixed aqueous solution containing iodized and zinc salt. The membrane is porous membrane does not contain ion exchange group. Both the positive and negative electrolyte are neutral solutions.

Zinc iodine flow battery

An electrode structure of a flow battery, a flow battery stack, and a sealing structure of the flow battery stack, wherein the density of the vertical tow in the electrode fiber is larger than the density of the parallel tow. In the electrode fiber per unit volume, the quantity ratio of the vertical tow to the parallel tow is at least 6:4. The electrode structure is composed of an odd number of layers of the electrode fibers, and the porosity of other layers is larger than the porosity of the center layer. The electrode structure is mainly composed of the vertical tows perpendicular to the surface of the electrode, so that, firstly, the contact area between the outer surface of the electrode and the adjacent component can be increased and the contact resistance can be reduced, secondly, the electrode is endowed with good mechanical properties, compared with the original structure, the contact resistance of such structure is reduced by 30%-50%; and the layers of the electrode have different thickness depending on the porosity, after compression, the layers with optimized thickness have a consistent porosity, this compressed uniform structure avoids uneven mass transfer phenomena when the electrolyte flows through the electrode, and reduces the concentration polarization of the battery and thereby improving the battery energy output under the given power.

A flow battery system has an electrolyte storage tank, a flow battery, and a box-type flow battery system. A circular pipe I and a circular pipe II are provided in the electrolyte storage tank; the circular pipe II is communicated with an electrolyte return opening; the circular pipe I is communicated with an electrolyte delivery outlet; the annular perimeter of the circular pipe I is not equal to the annular perimeter of the circular pipe II. The multi-layer circular pipe structure in the storage tank reduces the flowing dead zone of electrolyte in the storage tank. Moreover, The reduction in the longitudinal distance between the electrolyte delivery outlet and the electrolyte return opening also reduced the problem of SOC lag so that the SOC monitoring accuracy of the flow battery is improved.

Electrolyte storage tank, flow battery, box-type flow battery system and charge-discharge control method of flow battery

A flow battery has a control system and a control method to control the operation of the flow battery. The control method includes disposing an SOC detection device respectively at a positive electrolyte outlet and a negative electrolyte outlet of a cell stack; obtaining, by the SOC detection devices, SOCs at the electrolyte outlets of the cell stack under an initial state of the flow battery; at every preset time, acquiring the volume of electrolyte in the positive electrolyte storage tank, the volume of electrolyte in the negative electrolyte storage tank, the volume of the electrolyte flowing into the positive electrolyte storage tank, and the volume of the electrolyte flowing into the negative electrolyte storage tank, and meanwhile, obtaining, by the SOC detection devices, SOCs at the electrolyte outlets of the cell stack; and obtaining SOC of the flow battery.

An apparatus monitors the state of charge (SOC) of a flow battery system. The monitoring method include determining SOCs of at least two pairs of different monitoring positions. A pair of monitoring position may be located inside of an anode electrolyte storage tank () and inside of a cathode electrolyte storage tank (), or inside of an anode electrolyte outlet pipeline () of a stack and inside of a cathode electrolyte outlet pipeline () of the stack, or inside of an anode electrolyte inlet pipeline () of the stack and inside of a cathode electrolyte inlet pipeline () of the stack. The SOCof the flow battery system is acquired according to the SOCs corresponding to different pair of monitoring positions, respectively. The method ensures acquiring an SOC monitoring result timely and accurately.

Method and system for monitoring state of charge (SOC) of flow battery system

The present invention relates to a quinone polyhalide flow battery, wherein a positive electrolyte is a mixed solution of hydrochloric acid and sodium bromide, and a negative electrode is a mixed solution of hydrochloric acid and anthraquinone. The problems that the cost of a quinone bromine flow battery is relatively high and the voltage of the battery is relatively low are improved.

Quinone polyhalide flow battery

Method and system for monitoring state of charge (SOC) of flow battery system, flow battery based on redundancy design of SOC detection device, method and device for determining actual capacity of flow battery, and method and system for estimating input-output characteristic of alternating-current side of flow battery

A polymer ion exchange membrane for acidic electrolyte flow battery. The membrane is nitrogen heterocycles aromatic polymer, especially polybenzimidazole type polymer. A nitrogen heterocycles in the membrane interact with acid in the electrolyte to form donor-receptor proton transport network, so as to keep the proton transport performance of the membrane. The preparation condition for the membrane is mild, and the process is simplicity. The preparation method is suitable for mass production. The membrane is used in acidic electrolyte flow battery, especially in vanadium flow energy storage battery. The membrane has excellent mechanical stability and thermostability. In vanadium redox flow battery, the membrane has excellent proton conduct performance and excellent resistance to the permeation of vanadium ions.

Aromatic polymer ion exchange membranes, its composite membrane, and its application in acidic electrolyte flow battery

Disclosed is use of a porous membrane and a composite membrane thereof in a redox flow batteries, and in particular the use thereof in a vanadium redox flow battery. The membrane can effectively realize the separation of ions with different valence states, and an ion transfer without any ion exchange group. The pore size and structure of the porous membrane can be controlled by filling an inorganic substance or grafting an ion exchange group in the pore, in order to improve the barrier properties of the porous membrane for vanadium ions and to increase proton conductivity.

Use of porous membrane and composite membrane thereof in redox flow energy storage battery

A non-noble metal based catalyst includes a compound represented by Formula 1:ZrMON&#x2003;&#x2003;[Formula 1]where M is at least one element selected from Group 4 elements through Group 12 elements, a is a number in the range of about 1 to about 8, b is a number in the range of 1 to 8, x is a number in the range of about 0.2 to about 32, and y is a number in the range of about 0.2 to about 16. A fuel cell electrode and fuel cell may be formed using the non-noble metal based catalyst.

Non-noble metal based catalyst and fuel cell including the non-noble metal based catalyst

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Liaoning, China

Huamin Zhang