CN214956979U - Low-voltage nickel-hydrogen battery energy storage system - Google Patents
Low-voltage nickel-hydrogen battery energy storage system Download PDFInfo
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- CN214956979U CN214956979U CN202121484020.2U CN202121484020U CN214956979U CN 214956979 U CN214956979 U CN 214956979U CN 202121484020 U CN202121484020 U CN 202121484020U CN 214956979 U CN214956979 U CN 214956979U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
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Abstract
The utility model discloses a low-voltage nickel-hydrogen battery energy storage system, which comprises a low-voltage nickel-hydrogen battery module formed by N low-voltage nickel-hydrogen batteries in a series or parallel mode, wherein N is more than or equal to 2; m low-voltage nickel-hydrogen battery modules are connected with each other to form a low-voltage nickel-hydrogen battery energy storage system, wherein M is more than or equal to 2; the low-voltage nickel-hydrogen battery module is connected to a low-voltage solid hydrogen storage tank through a battery module air pipe, and a control valve is arranged on a pipeline between the low-voltage solid hydrogen storage tank and the nickel-hydrogen battery; the hydrogen storage material in the low-pressure solid hydrogen storage tank is separated from the battery, so that the problem of self-amplification of the nickel-hydrogen battery can be effectively solved, the corrosion of electrolyte to the hydrogen storage material can be eliminated, and the cycle life and the service life of the battery can be greatly prolonged; the breathable film is made of a waterproof, oxygen-proof and hydrogen-permeable material, so that the electrolyte is prevented from contacting hydrogen storage material powder, and the service life is prolonged.
Description
Technical Field
The utility model relates to an energy storage battery technical field, concretely relates to low pressure hydrogen nickel battery energy storage system.
Background
At present, the world energy demand is increasing day by day, and the requirement for environmental protection is also paid attention to. Therefore, the specific gravity of the original energy such as petroleum is reduced or avoided as much as possible, and the development of low-carbon clean energy is the subject of controversy in various countries. At present, photovoltaic, wind power and hydropower are mature, and the application is gradually increased. They all suffer from conditions that cause imbalance in the amount of power delivered. For example, photovoltaics are subject to the weather, such as sunlight. Wind power is also affected by wind power, wind direction, intermittent instability, seasonal variations and the like. Hydropower is also affected by seasons and the like. Therefore, it is important that these power plants have some additional devices or apparatuses for regulating or stabilizing the output power.
From the current technical development level and means, it is reasonable to add some matched energy storage power supplies. However, the existing chemical power sources are generally and economically provided with lithium ion batteries, lead storage batteries, sodium-sulfur batteries, flow batteries, fuel cells and the like. However, the lithium ion battery is difficult to meet the requirement of large-scale energy storage on safety, has a common service life, and cannot resist overcharge and overdischarge. Lead-acid batteries contain lead and are not environmentally friendly and have a limited service life. Sodium-sulfur batteries generally operate at high temperatures of about 350 ℃, and metal sodium is difficult to ensure safety. The flow battery is mainly a vanadium flow battery, low specific energy, high one-time investment cost caused by vanadium electrolyte, a diaphragm and the like, and the problems of mutual interference of positive electrolyte and negative electrolyte and the like exist in long-term operation. The electrolytic water hydrogen production and reuse fuel cell power generation is also an energy storage scheme, and the biggest problem is that the electric energy efficiency is only about 30 percent, and a large amount of energy is wasted.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the problem to prior art existence provides a low pressure hydrogen nickel battery energy storage system that overlength life-span, price are moderate, can be able to bear or endure overcharge overdischarge, security height, low carbon environmental protection.
The utility model adopts the technical proposal that:
a low-voltage nickel-hydrogen battery energy storage system comprises a low-voltage nickel-hydrogen battery module formed by connecting N low-voltage nickel-hydrogen batteries in series or in parallel, wherein N is more than or equal to 2; m low-voltage nickel-hydrogen battery modules are connected with each other to form a low-voltage nickel-hydrogen battery energy storage system, wherein M is more than or equal to 2; the low-voltage nickel-hydrogen battery module is connected to the low-voltage solid hydrogen storage tank through a battery module air pipe.
Further, the low-pressure nickel-hydrogen battery module gas pipe comprises a gas-permeable membrane used for sealing a battery gas pipe interface; the breathable film is a waterproof oxygen-proof hydrogen-permeable film; the breathable film is connected to one end of the first interface, and the other end of the first interface is connected with the first header pipe; the first main pipe is provided with a second interface used for connecting a low-pressure solid hydrogen storage tank.
Furthermore, the low-pressure solid hydrogen storage tank comprises a hydrogen storage material filled in the tank for absorbing and discharging hydrogen and a valve on the low-pressure solid hydrogen storage tank for controlling the self-discharge of the battery.
Further, the valve is arranged on a third interface of which one end is connected with the low-pressure solid-state hydrogen storage tank; the other end of the third interface is connected to a second main pipe; the second ports are each connected to a second manifold.
Further, the low-voltage nickel-hydrogen battery comprises a plurality of battery elements, wherein the battery elements comprise at least one negative electrode plate, at least one positive electrode plate and at least one diaphragm; the battery also comprises a shell for arranging the battery element, and a battery air pipe interface and positive and negative poles are arranged on the shell; the N low-voltage nickel-hydrogen batteries are fixed together through fasteners, and the positive and negative poles of the N low-voltage nickel-hydrogen batteries are connected through connecting sheets.
Further, the battery element is constructed in a wound or laminated form.
The utility model has the advantages that:
(1) the hydrogen in the hydrogen storage tank is separated from the battery, so that the problem of self-amplification of the hydrogen-nickel battery can be effectively solved;
(2) the breathable film in the utility model is made of waterproof, oxygen-proof and hydrogen-permeable materials, so as to prevent the electrolyte from contacting the hydrogen storage material powder and prolong the service life of the battery or the system;
(3) the hydrogen storage material in the utility model is arranged in the solid hydrogen storage tank outside the battery and isolated from the electrolyte, thus eliminating the corrosion of the electrolyte to the hydrogen storage material and greatly prolonging the cycle life and service life of the battery;
(4) the utility model discloses in adopt solid-state hydrogen storage material to store hydrogen, for the hydrogen-nickel battery who uses gaseous hydrogen, the volume reduces by a wide margin, battery cost reduction.
Drawings
Fig. 1 is a schematic structural diagram of the middle and low voltage nickel-hydrogen battery module of the present invention.
Fig. 2 is a schematic structural diagram of the middle-low pressure nickel-hydrogen battery module gas pipe of the present invention.
Fig. 3 is a schematic diagram of the structure of the nickel-hydrogen battery energy storage system formed by connecting the low-medium voltage nickel-hydrogen battery modules in series.
Fig. 4 is a schematic diagram of the structure of the nickel-hydrogen battery energy storage system formed by connecting the middle-low voltage nickel-hydrogen battery modules in parallel.
Fig. 5 is a schematic structural view of the middle and low pressure solid hydrogen storage tank of the present invention.
Fig. 6 is a schematic diagram of a battery structure formed by stacking battery elements according to the present invention.
Fig. 7 is a schematic diagram of a battery structure formed by winding the battery element according to the present invention.
In the figure: 1-low-pressure nickel-hydrogen battery, 2-fastener, 3-battery air pipe interface, 4-connecting sheet, 5-positive and negative poles, 6-breathable film, 7-first interface, 8-first main pipe, 9-second interface, 10-hydrogen storage material, 11-low-pressure solid hydrogen storage tank, 12-second main pipe, 13-third interface, 14-valve, 15-negative pole sheet, 16-diaphragm, 17-positive pole sheet, 18-shell and 19-air chamber.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
A low-voltage nickel-hydrogen battery energy storage system comprises a low-voltage nickel-hydrogen battery module formed by connecting N low-voltage nickel-hydrogen batteries 1 in series or in parallel, wherein N is more than or equal to 2; m low-voltage nickel-hydrogen battery modules are connected with each other to form a low-voltage nickel-hydrogen battery energy storage system, wherein M is more than or equal to 2; the low-voltage nickel-hydrogen battery module is connected to the low-voltage solid hydrogen storage tank 11 through a battery module air pipe. The structure of the low-voltage nickel-hydrogen battery module is shown in figure 1.
The battery module gas pipe comprises a gas permeable membrane 6 for sealing the battery gas pipe interface 3; the breathable film 6 is a waterproof oxygen-proof hydrogen-permeable film; the air permeable membrane 6 is connected to one end of a first interface 7, and the other end of the first interface 7 is connected with a first main pipe 8; the first manifold 8 is provided with a second interface 9 for connecting a low-pressure solid-state hydrogen storage tank 11. The specific structure is shown in fig. 2.
The low-pressure solid hydrogen storage tank 11 comprises a hydrogen storage material 10 filled in the tank for absorbing and discharging hydrogen and a valve 14 on the low-pressure solid hydrogen storage tank 11 for controlling the self-discharge of the battery. The valve 14 is arranged on a third interface 13 with one end connected with the low-pressure solid-state hydrogen storage tank 11; the other end of the third port 13 is connected to the second manifold 12; the second connections 9 are each connected to a second manifold 12.
The low-voltage nickel-hydrogen battery 1 comprises a plurality of battery elements, wherein each battery element comprises at least one negative electrode sheet 15, at least one positive electrode sheet 17 and at least one diaphragm 16; the solar battery further comprises a shell 18 for arranging battery elements, and a battery air pipe interface 3 and positive and negative poles 5 are arranged on the shell 18.
The N low-voltage nickel-hydrogen batteries are fixed together by a fastener 2, and the positive and negative poles 5 of the N low-voltage nickel-hydrogen batteries are connected by a connecting sheet 4.
The cell element is constructed in a wound or laminated form. Fig. 7 is a cylindrical battery in which the battery element is constructed in a wound form, and fig. 6 is a prismatic battery in which the battery element is constructed in a laminated form. Cells (i.e., battery elements) of suitable size or capacity are made as desired. And (3) putting the battery core into the shell 18, injecting liquid and sealing to obtain the required low-pressure nickel-hydrogen battery (the battery is reserved with the air pipe interface 3). The low-voltage nickel-hydrogen battery 1 is combined in series and parallel according to the use occasion to obtain the required low-voltage nickel-hydrogen battery module.
A preparation method of a low-voltage nickel-hydrogen battery energy storage system comprises the following steps:
step 1: connecting N low-voltage nickel-hydrogen batteries in series or in parallel to obtain a low-voltage nickel-hydrogen battery module;
step 2: the positive and negative electrodes of the M low-voltage nickel-hydrogen battery modules are connected through leads, and the air pipes of the M low-voltage nickel-hydrogen battery modules are connected and converged and connected to the low-voltage solid hydrogen storage tank 11, so that the required low-voltage nickel-hydrogen battery energy storage system can be obtained.
The preparation process of the positive plate in the low-voltage nickel-hydrogen battery is as follows:
mixing nickel hydroxide, coating the mixed solution on a foamed nickel or nickel-plated steel strip, and tabletting and cutting the foamed nickel or nickel-plated steel strip into a positive plate;
the preparation process of the negative plate in the low-voltage nickel-hydrogen battery is as follows:
the catalyst is attached to the substrate, and the pressed sheet is cut into the negative plate. The method for attaching the catalyst to the substrate may be one of coating, electroplating, electroless plating, and sputtering. The substrate is one of foamed nickel, nickel-plated steel strip or carbon paper.
The M low-voltage nickel-hydrogen battery modules are connected in series or in parallel. The positive and negative poles of the low-voltage nickel-hydrogen battery module are connected and gathered through a lead, and the air pipe of the low-voltage nickel-hydrogen battery module is connected and gathered through an air pipe to obtain a required battery pile, namely the low-voltage nickel-hydrogen battery energy storage system.
The total positive and negative poles of the battery stack are connected with the generator set and are simultaneously connected with the output circuit, and the working state of the battery stack is controlled by the switch. A stack main gas pipe, namely a second main pipe 12 is connected with a solid-state low-pressure hydrogen storage tank, namely a hydrogen storage tank 11, and a valve 14 is arranged at the connection position.
The utility model discloses in the solid-state hydrogen storage tank 11 hydrogen and low pressure hydrogen-nickel battery separation, can effectively solve the problem of hydrogen-nickel battery from enlarging. The hydrogen storage material is arranged in the solid hydrogen storage tank 11 outside the battery and isolated from the electrolyte, so that the corrosion of the electrolyte to the hydrogen storage material 10 can be eliminated, and the cycle life and the service life of the battery can be greatly prolonged. The hydrogen storage material 10 can compress the hydrogen by more than 1000 times, and compared with the existing nickel-hydrogen battery which uses gaseous hydrogen, the volume is greatly reduced, and the volume energy density is greatly improved. The working hydrogen pressure of the low-voltage nickel-hydrogen battery is less than 0.1MPa, the use safety is high, and the self-discharge of the battery can be reduced. The hydrogen storage material 10 is adopted to store hydrogen, so that the pressure of the hydrogen during working can be stabilized, the problem of the inclination of the working voltage of the existing gaseous hydrogen is solved, the charging and discharging characteristics of the battery are better, and the discharging voltage is more stable.
Claims (6)
1. A low-voltage nickel-hydrogen battery energy storage system is characterized by comprising a low-voltage nickel-hydrogen battery module formed by connecting N low-voltage nickel-hydrogen batteries (1) in series or in parallel, wherein N is more than or equal to 2; m low-voltage nickel-hydrogen battery modules are connected with each other to form a low-voltage nickel-hydrogen battery energy storage system, wherein M is more than or equal to 2; the low-voltage nickel-hydrogen battery module is connected to a low-voltage solid hydrogen storage tank (11) through a battery module air pipe.
2. A low-pressure ni-mh battery energy storage system according to claim 1 characterized in that the battery module gas tube comprises a gas permeable membrane (6) for sealing the battery gas tube interface (3); the breathable film (6) is a waterproof oxygen-proof hydrogen-permeable film; the air permeable membrane (6) is connected to one end of the first connector (7), and the other end of the first connector (7) is connected with the first header pipe (8); the first main pipe (8) is provided with a second interface (9) for connecting a low-pressure solid hydrogen storage tank (11).
3. A low-pressure ni-mh battery energy storage system according to claim 1 characterized in that the low-pressure solid hydrogen storage tank (11) comprises a hydrogen storage material (10) filled in the tank for absorbing and discharging hydrogen and a valve (14) on the low-pressure solid hydrogen storage tank (11) for controlling the self-discharge of the battery.
4. A low-pressure ni-mh battery energy storage system according to claim 3 characterized in that the valve (14) is set to the third port (13) with one end connected to the low-pressure solid-state hydrogen storage tank (11); the other end of the third interface (13) is connected to the second main pipe (12); the second ports (9) are each connected to a second manifold (12).
5. A low-pressure nickel-hydrogen battery energy storage system according to claim 1, characterized in that the low-pressure nickel-hydrogen battery (1) comprises a plurality of battery elements, wherein the battery elements comprise at least one negative plate (15), at least one positive plate (17) and at least one diaphragm (16); the battery air pipe connector also comprises a shell (18) for arranging a battery element, wherein a battery air pipe connector (3) and positive and negative poles (5) are arranged on the shell (18); the N low-voltage nickel-hydrogen batteries (1) are fixed together through fasteners (2), and the positive and negative poles (5) of the N low-voltage nickel-hydrogen batteries are connected through connecting sheets (4).
6. A low-pressure NiH cell energy storage system as claimed in claim 5, wherein the cell elements are constructed in a wound or laminated form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121484020.2U CN214956979U (en) | 2021-07-01 | 2021-07-01 | Low-voltage nickel-hydrogen battery energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121484020.2U CN214956979U (en) | 2021-07-01 | 2021-07-01 | Low-voltage nickel-hydrogen battery energy storage system |
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| Publication Number | Publication Date |
|---|---|
| CN214956979U true CN214956979U (en) | 2021-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121484020.2U Active CN214956979U (en) | 2021-07-01 | 2021-07-01 | Low-voltage nickel-hydrogen battery energy storage system |
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2021
- 2021-07-01 CN CN202121484020.2U patent/CN214956979U/en active Active
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