CN218783605U

CN218783605U - Hydrogen production power supply system with super capacitor and battery mixed energy storage

Info

Publication number: CN218783605U
Application number: CN202223177020.5U
Authority: CN
Inventors: 周行; 汤晓舒; 周军; 李少华; 王慧
Original assignee: North China Power Engineering Co Ltd of China Power Engineering Consulting Group
Current assignee: North China Power Engineering Co Ltd of China Power Engineering Consulting Group
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-03-31
Anticipated expiration: 2032-11-29

Abstract

The utility model provides a hydrogen manufacturing power supply system of hybrid energy storage of super capacitor and battery, include BMS system of being connected with external power source, by parallelly connected energy memory, the electrolysis trough that forms of super capacitor and battery, the electric output of this BMS system is connected with energy memory's electric input, and the super capacitor of this energy memory and the electric output of battery all are connected with the electrolysis trough. The utility model discloses utilize parallelly connected super capacitor and the battery that sets up as energy memory, compare traditional energy memory, improved power output ability, have low inside consume, and increased discharge time, can reduce the charge-discharge cycle number of times of battery, increase of service life.

Description

Hydrogen production power supply system with super capacitor and battery mixed energy storage

Technical Field

The utility model relates to an energy storage system power supply field, especially a hydrogen manufacturing power supply system of hybrid energy storage of super capacitor and battery.

Background

An energy storage system is usually arranged in a project of producing hydrogen by electrolyzing water by using renewable energy sources, and the energy storage system mainly has the following functions: (1) When the photovoltaic or wind power output has surplus, the energy storage device is used as energy storage equipment to supply power to the electrolytic cell in the following needs; (2) When the main power supply fluctuates greatly, the main power supply is used as power adjusting equipment to participate in the power transmission and distribution process so as to continuously provide high-quality and stable power for the electrolytic cell; (3) When the system is separated from the main power grid, the system is used as a stabilized voltage power supply to participate in the power transmission and distribution process of the whole system.

A battery is adopted as an energy storage device in a common energy storage system, and the energy storage system has good energy storage density and is suitable for a long-term compact energy storage scene. However, the battery used as the energy storage device has some disadvantages, for example, the charging and discharging efficiency of the battery is greatly reduced in a low-temperature operating environment. The power system of the renewable energy hydrogen production project has the characteristics of large fluctuation and frequent fluctuation, so that the energy storage device needs to be adjusted for many times and frequently. This rapid charge and discharge cycling condition can rapidly reduce the useful life of the battery.

And the electrolytic cell is used as an electricity power supply for hydrogen production by renewable energy sources, and a continuous and fluctuation-free power supply scheme is needed, so that stable hydrogen production is obtained. The large electrical energy input required to rapidly raise the temperature within the cell at initial start-up of the cell makes it difficult to achieve the instantaneous discharge rate of the battery, especially when cold start-up of multiple cells is required.

SUMMERY OF THE UTILITY MODEL

The utility model provides a hydrogen manufacturing power supply system of hybrid energy storage of super capacitor and battery provides parallelly connected super capacitor and the battery that sets up, can utilize the complementarity of super capacitor and battery on technical performance, increases substantially energy storage system's performance.

The utility model discloses the technical means who adopts as follows:

the hydrogen production and power supply system comprises a BMS system connected with an external power supply, an energy storage device and an electrolytic bath, wherein the energy storage device is formed by connecting a super capacitor and a battery in parallel, the electric output end of the BMS system is connected with the electric input end of the energy storage device, and the electric output ends of the super capacitor and the battery of the energy storage device are electrically connected with the electrolytic bath.

Preferably, the electrical output of the BMS system is connected to the electrical input of the energy storage device via an inductor.

Preferably, a DC/DC is also provided in series on the front side of the battery on the line of the battery in the energy storage device.

Preferably, a DC/DC is also provided in series on both the front side of the super capacitor on the line where the super capacitor is located and the front side of the battery on the line where the battery is located in the energy storage device.

Compared with the prior art, the utility model has the advantages of as follows:

compared with the traditional energy storage device, the utility model has the advantages that the super capacitor and the battery which are arranged in parallel are used as the energy storage device, so that the power output capacity is improved, the internal loss is low, the discharge time is prolonged, the charge-discharge cycle times of the battery can be reduced, and the service life is prolonged; the hybrid energy storage device can also reduce the volume of the energy storage device and improve the reliability and the economy of a power supply system; the BMS system is arranged in the utility model, the SOC of the super capacitor and the battery can be monitored in real time, and the input direct current is used for distributing power to the electrolytic cell through the BMS system; the inductor is connected in series between the BMS system and the energy storage device, has a filtering function, can stabilize the output current of the battery and effectively inhibit current ripples; and the series connection of the DC/DC on the battery and the super capacitor circuit can also protect the battery in a limited way, the super capacitor bears the load voltage of the electrolytic cell when the high power is output, and the load voltage of the electrolytic cell is controlled by the battery.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the hydrogen production and power supply system of the present invention.

Fig. 2 is a schematic structural diagram of a second embodiment of the hydrogen production and power supply system of the present invention.

Fig. 3 is a schematic structural diagram of a third embodiment of the hydrogen production and power supply system of the present invention.

Fig. 4 is a schematic structural diagram of a fourth embodiment of the hydrogen production and power supply system of the present invention.

Wherein:

1BMS system, 2 super capacitor, 3 battery, 4 electrolytic cell, 5 inductance, 6DC/DC.

Detailed Description

As shown in FIGS. 1-4, the following specific examples are provided.

As shown in figure 1, the hydrogen production and power supply system with super capacitor and battery hybrid energy storage comprises a BMS system 1 connected with an external power supply, an energy storage device formed by connecting a super capacitor 2 and a battery 3 in parallel, and an electrolytic bath 4, wherein the electric output end of the BMS system 1 is connected with the electric input end of the energy storage device, and the electric output ends of the super capacitor 2 and the battery 3 of the energy storage device are both electrically connected with the electrolytic bath 4.

In the second embodiment shown in fig. 2, the electrical output terminal of the BMS system 1 is connected to the electrical input terminal of the energy storage device through an inductor 5, and the output current of the battery 3 can be stabilized while effectively suppressing current ripple by connecting the inductor 5 in series.

In a third embodiment shown in fig. 3, a DC/DC 6 (also called a DC chopper) is also connected in series on the front side of the battery 3 on the line of the battery 3 in the energy storage device.

And in the fourth embodiment as shown in fig. 4, the front side of the super capacitor 2 of the line of the super capacitor 2 and the front side of the battery 3 of the line of the battery 3 in the energy storage device are both provided with DC/DC 6 in series. The series arrangement of the DC/DC 6 in the third embodiment shown in FIG. 3 and the fourth embodiment shown in FIG. 4 can effectively protect the battery 3, realize that the super capacitor 2 bears the load voltage of the electrolytic cell 4 at the time of high power output, and control the load voltage of the electrolytic cell 4 by the battery 3.

The utility model discloses an energy memory who is mixed by super capacitor 2 and battery 3 can provide quick, steady electric energy input for electrolysis trough 4. On the basis of a traditional battery energy storage system, the defects that the working efficiency of a battery is reduced in a low-temperature state, the instantaneous discharge efficiency is poor and the like are overcome by using the super capacitor. The power stability of the renewable energy hydrogen production system is improved, and the simultaneous cold start of a plurality of electrolytic cells can be realized. The invention also has good economy, prolongs the service life of the battery and reduces internal wear and equipment volume.

Wherein, the above examples only show the preferred implementation mode, and the model of its BMS system, super capacitor, battery, electrolysis trough, inductance, DC/DC all selects according to the general knowledge of technical staff in this field to and the setting quantity of super electrode and battery, the setting quantity and the position of inductance and DC/DC all can design according to actual engineering needs, still can set up necessary for the convenience realization such as switch in this hydrogen manufacturing power supply system the utility model discloses an element, it all belongs to the utility model discloses a protection scope.

Claims

1. The utility model provides a hydrogen manufacturing power supply system of super capacitor and battery mixed energy storage which characterized in that, includes BMS system (1) be connected with external power source, by super capacitor (2) and parallelly connected energy memory, electrolysis trough (4) that form of battery (3), the electricity output of this BMS system (1) is connected with energy memory's electric input end, the electricity output of this energy memory's super capacitor (2) and battery (3) all is connected with electrolysis trough (4) electricity.

2. A supercapacitor and battery hybrid energy storage hydrogen generation and supply system according to claim 1, characterised in that the electrical output of the BMS system (1) is connected to the electrical input of the energy storage device through an inductor (5).

3. The hydrogen-production power supply system with super capacitor and battery hybrid energy storage as claimed in claim 1, characterized in that the front side of the battery (3) of the circuit of the battery (3) in the energy storage device is also provided with DC/DC (6) in series.

4. The hydrogen and power generation and supply system based on hybrid energy storage of super capacitor and battery as claimed in claim 1, wherein the front side of super capacitor (2) of the line of super capacitor (2) and the front side of battery (3) of the line of battery (3) in the energy storage device are both provided with DC/DC (6) in series.