阅读说明：本技术 一种可用于风光发电储能的长寿命可充式锌-空气电池堆 (Long-life chargeable zinc-air battery stack capable of being used for wind and solar power generation and energy storage ) 是由 魏满晖 王克亮 左亚宇 刘健 柳晓添 于 2021-08-02 设计创作，主要内容包括：本发明公开了一种可用于风光发电储能的长寿命可充式锌-空气电池堆,该电池堆包括包括若干个可充式锌-空气单体电池、螺线管式导线支撑结构及导线、永磁体、电池堆外壳和冷却流道。本发明的可充式锌-空气单体电池中的不锈钢支架将网格镍和空气电极并联连接,加快了充电时氧气从电解液中析出的速率,提高了充电效率；利用风光发电脉冲电流产生的直线磁场和永磁体的恒定直线磁场作用,遏制了锌枝晶生长,改善了锌电极表面的形貌,延长了电池堆的循环使用寿命；瓦楞状电池堆外壳、电池堆外壳通风孔以及蛇形波纹状冷却流道,保证了电池的有效散热。该发明应用前景广泛,符合分布式能源系统的构建理念。(The invention discloses a long-life rechargeable zinc-air battery stack for wind and light power generation and energy storage. The stainless steel bracket in the rechargeable zinc-air single battery of the invention connects the grid nickel and the air electrode in parallel, thus accelerating the speed of oxygen separating out from the electrolyte during charging and improving the charging efficiency; the linear magnetic field generated by the wind-light-generated electric pulse current and the constant linear magnetic field of the permanent magnet are utilized to inhibit the growth of zinc dendrites, improve the appearance of the surface of a zinc electrode and prolong the cycle service life of the cell stack; the corrugated cell stack shell, the cell stack shell vent holes and the snake-shaped corrugated cooling flow channel ensure effective heat dissipation of the cell. The invention has wide application prospect and accords with the construction concept of a distributed energy system.)

1. A long-life rechargeable zinc-air battery stack capable of being used for wind and light power generation and energy storage is characterized in that: the long-life rechargeable zinc-air battery stack for wind and solar power generation and energy storage comprises a plurality of rechargeable zinc-air single batteries 8, a solenoid type lead supporting structure and lead 9, a permanent magnet 10, a battery stack shell 11 and a cooling flow channel 12;

the rechargeable zinc-air single battery 8 comprises a zinc electrode 1, an air electrode 2, grid nickel 3, a stainless steel support 4 and electrolyte, wherein the grid nickel 3 and the air electrode 2 are connected in parallel by the stainless steel support 4, and a plurality of single batteries are connected in series, in parallel or in series-parallel;

the solenoid type lead supporting structure and the lead 9 are uniformly and densely wound on the outer surface of the battery to create a linear magnetic field;

the permanent magnet 10 is tightly attached to the outer sides of two electrodes of a group of batteries connected in series to create a constant linear magnetic field;

the stack case 11 has a hexahedral structure, and encloses the stack therein;

the cooling flow channel 12 is a stainless steel serpentine corrugated round tube.

2. The long-life rechargeable zinc-air battery stack of claim 1, wherein: the pore area of the grid nickel 3 is 1-3mm²(ii) a The electrolyte was a 6mol/L potassium hydroxide solution in which 0.5mol/L zinc oxide was dissolved.

3. The long-life rechargeable zinc-air battery stack of claim 1, wherein: the material of the solenoid wire support structure is low density high pressure polyethylene.

4. The long-life rechargeable zinc-air battery stack of claim 1, wherein: the N pole and S pole of the permanent magnet 10 are disposed outside the two poles of a group of batteries connected in series, and the N pole and S pole are not in sequence as long as the outside magnetism of the two poles is different.

5. The long-life rechargeable zinc-air battery stack of claim 1, wherein: the material of the stack housing 11 is low density high pressure polyethylene, six sides are corrugated for better heat dissipation, and four sides are vented for heat dissipation and oxygen transport.

6. The long-life rechargeable zinc-air battery stack of claim 1, wherein: the cooling flow channel 12 is disposed at the bottom of the stack case 11, and realizes a cooling function by the flow of cooling water.

Technical Field

The invention belongs to the field of battery pile energy storage, and particularly relates to a zinc-air battery pile capable of being used for new energy power generation and energy storage.

Background

Electric energy is a special secondary energy, and dominates the development of society and the progress of science and technology. At present, the power generation is mainly based on non-renewable energy sources such as coal, petroleum, natural gas and the like in the world. However, as global fossil energy reserves are decreasing, the contradiction between energy supply and demand is becoming more acute. Therefore, the power generation of new energy sources such as wind energy, solar energy and the like is regarded as supplement or even replacement of the traditional mode, and has wide application prospect.

In order to effectively store electric energy obtained by converting new energy such as wind energy, solar energy and the like and realize the construction of a distributed energy system, lead-acid, nickel-cadmium or lithium battery and other media are generally used as energy storage devices. However, despite the maturity of the related art, the cost, price and pollution of the energy storage device limit the further development thereof.

The rechargeable zinc-air battery stack has simple structure, low cost of raw materials (23 yuan/kg), and high specific energy (1.35X 10)³Wh/kg), stable and reliable work and convenient maintenance, and has bright prospect when being used in the field of wind and light power generation and energy storage. However, the development of the battery has the following disadvantages:

(1) in the process of large-current charging, the charging efficiency is reduced because oxygen cannot be discharged out of the electrolyte in time;

(2) during charging, the problem of zinc dendrite growth on the surface of a zinc electrode can not be effectively solved all the time, which is very easy to cause short circuit of the battery, and further causes thermal runaway and influences the service life of the battery.

The above problems greatly limit the further development of rechargeable zinc-air batteries.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a long-life rechargeable zinc-air battery stack for wind-solar power generation and energy storage, so that the charging efficiency of the battery stack is effectively improved, and the problem of zinc dendrite growth is improved.

In order to achieve the purpose of the invention, the following technical scheme is provided.

A long-life rechargeable zinc-air battery stack for wind and light power generation and energy storage is characterized in that: the long-life rechargeable zinc-air battery stack for wind and solar power generation and energy storage comprises a plurality of rechargeable zinc-air single batteries, a solenoid type lead supporting structure, leads, permanent magnets, a battery stack shell and a cooling flow channel;

the rechargeable zinc-air single battery comprises a zinc electrode, an air electrode, grid nickel, a stainless steel support and electrolyte, wherein the grid nickel and the air electrode are connected in parallel by the stainless steel support, and a plurality of single batteries are connected in series, in parallel or in series-parallel;

the solenoid type lead supporting structure and the lead are uniformly and densely wound on the outer surface of the battery to create a linear magnetic field;

the permanent magnet is tightly attached to the outer sides of two electrodes of a group of batteries connected in series to create a constant linear magnetic field;

the battery stack shell is of a hexahedral structure and covers the battery stack;

the cooling flow channel is a snakelike corrugated round pipe made of stainless steel.

Furthermore, the pore area of the grid nickel is 1-3mm²(ii) a The electrolyte was a 6mol/L potassium hydroxide solution in which 0.5mol/L zinc oxide was dissolved.

Further, the material of the solenoid wire support structure is low density high pressure polyethylene.

Further, the N pole and the S pole of the permanent magnet are respectively arranged on the outer sides of the two electrodes of the group of batteries connected in series, and the N pole and the S pole are not sequentially arranged as long as the magnetism of the outer sides of the two electrodes is different.

Further, the material of the cell stack shell is low-density high-pressure polyethylene, six surfaces of the cell stack shell are corrugated to better dissipate heat, and four sides of the cell stack shell are provided with ventilation holes to dissipate heat and transport oxygen.

Furthermore, the cooling flow channel is arranged at the bottom of the cell stack shell, and the cooling function is realized by utilizing the flow of cooling water.

Compared with the prior art, the invention has the following beneficial effects:

(1) the grid nickel is used as the charging electrode and is connected with the air electrode in parallel, so that the internal resistance of the battery is effectively reduced, the rapid discharge of oxygen in the charging process is facilitated, and the electronic transmission of an external circuit is accelerated; in addition, the primary battery formed between the grid nickel and the zinc electrode directly participates in electrochemical reaction in the discharging process, so that the discharging current of the battery is improved;

(2) according to the invention, by utilizing a linear magnetic field generated by pulse current in the solenoid type charging conductor during wind-solar power generation and a constant linear magnetic field generated by an external permanent magnet, the growth of dendritic crystals of zinc is effectively inhibited, the uniformity of the surface appearance of a zinc electrode is promoted, and the cycle service life of a battery stack is prolonged;

(3) the invention effectively relieves the heat dissipation problem of the battery by utilizing the corrugated battery stack shell, the vent holes on the side surface of the shell and the snake-shaped corrugated cooling flow channel on the bottom surface of the shell.

Drawings

FIG. 1 is a schematic structural diagram of a long-life rechargeable zinc-air single cell for wind-solar energy storage;

FIG. 2 is a schematic diagram of a long life rechargeable zinc-air cell stack useful for wind and solar energy storage;

fig. 3 is a schematic structural diagram of a cooling flow channel of a long-life rechargeable zinc-air battery stack for wind and solar power generation and energy storage according to the invention.

In the figure: 1. zinc electrode, 2 air electrode, 3 grid nickel, 4 stainless steel support, 5 wind and light power generation device, 6 hydroxyl ion, 7 electrical appliance, 8 rechargeable zinc-air single battery, 9 solenoid type lead support structure and lead, 10 permanent magnet, 11 battery stack shell, 12 cooling flow channel.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, 2 and 3, fig. 1 is a schematic structural diagram of a long-life rechargeable zinc-air single cell for wind-solar power generation and energy storage according to the present invention; FIG. 2 is a schematic diagram of a long life rechargeable zinc-air cell stack useful for wind and solar power generation and energy storage in accordance with the present invention; fig. 3 is a schematic structural diagram of a cooling flow channel of a long-life rechargeable zinc-air battery stack which can be used for wind and light power generation and energy storage.

As shown in fig. 1, a schematic structural diagram of a long-life rechargeable zinc-air cell for wind and solar power generation and energy storage includes: the stainless steel bracket 4 is used as a conductor, and the air electrode 2 and the grid nickel 3 are connected in parallel, so that the internal resistance in the charging process is effectively reduced, and the transmission of ions in the electrolyte, external circuit electrons and oxygen is facilitated; and the grid nickel 3 and the zinc electrode 1 can form a primary battery in the discharging process, and can be discharged in parallel with the zinc-air battery, so that the discharging current of the single battery is increased.

As shown in fig. 2, a schematic structural diagram of a long-life rechargeable zinc-air battery stack for wind and solar power generation and energy storage includes the structural features: a plurality of rechargeable zinc-air single batteries 8 are connected in series and parallel; the solenoid type lead supporting structure and the lead 9 are uniformly and densely wound on the outer surface of the battery stack connected in series, and a linear magnetic field is created by using the pulse current generated by wind and light to play roles in restraining the growth of zinc dendrites and improving the surface appearance of a zinc electrode; in addition, the separation of oxygen from the electrolyte can be accelerated, and the charging efficiency is improved; two permanent magnets 10 with different magnetism are arranged at the outer sides of two electrodes of the battery stack connected in series to create a linear constant magnetic field and further enhance the magnetic field effect; the corrugated shape of the stack housing 11, in addition to the four side vents, ensures better heat dissipation from the stack.

As shown in fig. 3, a schematic structural diagram of a cooling flow channel of a long-life rechargeable zinc-air battery stack for wind and solar power generation and energy storage includes the following structural features: the cooling flow channel 12 is a serpentine corrugated round tube and is located at the bottom of the cell stack shell 11, and cooling water flows through the serpentine corrugated round tube to carry away heat generated during the operation of the cell stack and dissipate heat through a lead.

In the embodiment of the invention, the pore area of the grid nickel 3 is 2mm²The electrolyte was a 6mol/L potassium hydroxide solution in which 0.5mol/L zinc oxide was dissolved.

In the embodiment of the invention, the material of the solenoid type lead supporting structure is low-density high-pressure polyethylene, so that the heat of the lead is better conducted.

In the embodiment of the invention, the N pole of the permanent magnet 10 is arranged at one side of the zinc electrodes 1 of the group of batteries connected in series, and the S pole is arranged at one side of the air electrodes 2 of the group of batteries connected in series.

In the embodiment of the invention, 8 chargeable zinc-air single batteries 8 are connected in series into 1 group, and 4 groups are connected in parallel, wherein the first group is used for night illumination, the second group is used for an automobile charging pile, the third group is used for mobile phone charging, and the fourth group is used for a traffic indicator light.

In the embodiment of the invention, the material of the cell stack shell 11 is low-density high-pressure polyethylene, so that the overall quality of the cell stack is reduced while better heat dissipation in the cell stack is ensured.

It should be noted that the above embodiments are merely exemplary, and the present invention should not be limited to the above embodiments. It should be understood that any changes, substitutions and the like made on the basis of the principle of the present invention are within the scope of the present invention.