CN216054915U - Cell unit structure and metal fuel cell - Google Patents

Abstract

The utility model discloses a cell unit body structure and a cell combination mode, and belongs to the technical field of fuel cells. It includes a battery body configured as an annular hollow structure; the upper end of the battery body is provided with an upper connector and/or the lower end of the battery body is provided with a lower connector; an air electrode mounted to a side of a battery body, the air electrode being configured to be symmetrical with an axis of the battery body; the metal cathode is positioned in the battery body; and the current collector is arranged on the air electrode and used for guiding the air electrodes of the two adjacent battery bodies. The battery body is assembled through the upper joint and the lower joint, and the parallel connection is realized through the current collectors, which is equivalent to increase the reaction area of the air electrode and the metal cathode. The battery modules can be flexibly combined by flexibly selecting different numbers of battery bodies according to product requirements, so that the output power and the battery capacity specification of different metal fuel batteries are realized, and the battery modules have better expansibility.

Description

Cell unit structure and metal fuel cell

Technical Field

The utility model belongs to the technical field of metal fuel cells, and particularly relates to a cell unit body structure and a metal fuel cell.

Background

The metal fuel cell is an energy form which takes metal as fuel and takes oxygen as oxidant to carry out chemical reaction, and chemical energy is converted into electric energy. The output power of the battery is in direct proportion to the reaction area, but the metal fuel single battery structure cannot improve the output power of the battery unit body by infinitely increasing the area of the air electrode. The increase of the area of the air electrode of the unit body can increase the internal resistance of the air electrode, and the increase of the internal resistance is accompanied with the increase of the heat productivity and the current collection loss, so that the integral output power of the battery is reduced. In the prior art, more unit bodies are generally adopted to carry out series and parallel connection to improve the output power and the battery capacity of the metal fuel battery. The most of the existing metal fuel cell structures adopt a square structure, are arranged in an array manner and have the following defects:

firstly, in a metal fuel single cell, the area of the air electrode is not directly proportional to the output power of the air electrode, and an excessively large area of the air electrode may cause a larger resistance and heat generation, thereby affecting the overall output power of the cell.

Secondly, a large amount of electrolyte is stored in the cavity of the metal fuel cell, and the thermal field inside the square cell structure in the operation process is not uniformly distributed, so that local heat accumulation is easily caused, the air electrode is damaged, and the service life of the air electrode is shortened.

In addition, the metal fuel cell needs to continuously replace the electrolyte and the metal fuel during operation, and the operation comprises the steps of disassembling and assembling the cell upper cover and the metal fuel circuit connector, and discharging and filling the electrolyte. Each battery all needs to carry out above operation constantly, and the battery quantity is more, and the operation is more loaded down with trivial details, and the customer experience of product is worse. Therefore, how to increase the overall output power and capacity of the metal fuel cell without increasing the number of cells becomes a difficult problem in the design of the battery module in the field.

SUMMERY OF THE UTILITY MODEL

In order to solve or partially solve the defects and design problems of the single cell structure, embodiments of the present disclosure provide a cell unit structure, which has a capacity-expanding combination characteristic, and can increase the reaction area of the air electrode without increasing the number of cell units, so as to improve the overall output power and cell capacity of the metal fuel cell.

This and other objects are at least partly achieved by the cell structure and the metal fuel cell structure defined above.

Specifically, according to a first aspect of the present disclosure, there is provided a battery cell body structure including:

a battery body configured as a ring-shaped hollow structure; the upper end of the battery body is provided with an upper connector and/or the lower end of the battery body is provided with a lower connector, and the upper connector and the lower connector are matched to realize detachable connection between two adjacent battery monomers; an air electrode mounted to a side surface of the battery body, the air electrode being configured to be symmetrical with an axis Q of the battery body; a metal negative electrode in the battery body; and the current collector is arranged on the air electrode and used for guiding the air electrodes of the two adjacent battery bodies. Through the modularized design, the battery body is assembled through the upper joint and the lower joint, and the parallel connection is realized through the current collectors, which is equivalent to increase the reaction area of the air electrode and the metal cathode. Therefore, different numbers of battery bodies can be flexibly selected to be combined according to product requirements, the output power and the battery capacity specification of different metal fuel batteries are realized, and the battery module has better expansibility.

A second aspect of the present disclosure provides a battery pack including: according to the battery unit structure, the number of the battery unit body structures can be selected for assembly according to product requirements according to the modular design of the unit body structures, and the overall output power and the battery capacity of the metal fuel battery are improved under the condition that the number of batteries is not increased.

Further advantages are realized by implementing one or more of the features described above.

In one exemplary embodiment, the battery body includes a battery case and a grid skeleton; the battery shell is sleeved or embedded with a grid framework; the grid framework and the battery cell have a common axis Q; the grid framework is used for fixing the air electrode on the inner side or the outer side of the battery shell.

In an exemplary embodiment, the air electrode is arc-shaped, and one side of the grid framework is provided with a clamping groove matched with the shape of the air electrode;

one side of grid skeleton, top connection and lower clutch have with the corresponding blank holder portion of draw-in groove, the draw-in groove with blank holder portion is used for jointly fixing the air electrode. The air electrode and the circular outer grids are combined to form the arc structure, so that the strength of the air electrode is greatly improved, the air electrode cannot be sunken inwards, the pressure of the air electrode in the battery cavity is uniformly distributed, the influence on the electrode is reduced, and the battery operation is facilitated.

In an exemplary embodiment, the current collector is provided with a conductive part, the conductive parts between two adjacent batteries are connected through an external conductive connecting sheet, and the conductive part is used for collecting the current of the air electrode on the conductive connecting sheet to be connected with the next battery in parallel.

In one exemplary embodiment, the battery case has a support frame;

the grid framework is arranged integrally or in a split mode, and the grid framework is detachably connected with the supporting framework through a fastening assembly.

In an exemplary embodiment, the grid framework is formed by splicing at least two groups of grid monomers;

the fastening assembly comprises:

the arc convex seats are distributed on one side of the grid single bodies, and the arc convex seats on two adjacent grid single bodies jointly form a fastening hole;

a grid lock embedded in the fastening hole; and

one end of the fastening component penetrates through the grid lock and is used for fixing the grid monomer on the support framework; through the fastening device, the grid framework can be better assembled with the battery shell, the air electrode and the circular outer grid can be conveniently combined to form a circular arc with higher strength, and the strength of the air electrode is further improved.

In an exemplary embodiment, an upper cover is hermetically arranged in the upper joint; the upper cover body is detachably provided with a metal cathode;

or a lower cover body is hermetically arranged in the lower joint, and a metal cathode is arranged in the lower cover body.

In one exemplary embodiment, the metal negative electrode has a tab portion and an extension portion integral with the tab portion; the extension part is located at the center of the battery body and is of a cylindrical structure, and the extension part and the air electrode keep an equidistant gap. Because the cylindrical structure cavity of the cathode is of a symmetrical structure, the electron transfer path from the cathode to the anode is consistent, the overheating phenomenon caused by the electron transfer in the battery can be avoided, and the battery can run more stably.

In one exemplary embodiment, applied to a statically operated fuel cell, the extension has an opening at an end thereof, forming a first cavity in the metal anode; a second cavity is formed between the air electrode and the metal negative electrode; or

The end of the extension part is sealed when the extension part is applied to a dynamic liquid flow circulation fuel cell; a second cavity is formed between the air electrode and the metal negative electrode; through the negative pole design of fluid type, electrolyte distributes more evenly in the battery is originally internal, and when discharging, electrode and electrolyte fully contact can increase discharge efficiency, and in addition, the design of fluid type, the thermal field evenly distributed of being convenient for does benefit to the heat dissipation.

In one exemplary embodiment, the air electrode has a height of 10-20 cm; the diameter of a cylinder surrounded by the air electrodes is 4-10 cm.

The utility model has at least the following beneficial effects:

according to the embodiment of the disclosure, the components in the battery are in a modularized design and are spliced in a detachable connection mode, and the cylindrical battery shell is connected up and down according to different output powers to increase the air electrode reaction area, so that the output power and the battery capacity of the metal fuel battery are increased; the modular design battery unit body structure has better expansibility. Meanwhile, the limitation of the number of the batteries obviously reduces the complex operation degree of replacing the metal fuel and the electrolyte, and improves the use convenience of the product. In addition, the air electrode and the circular outer grid framework are combined to form an arc structure, so that the strength of the air electrode is greatly improved, the air electrode cannot be sunken inwards, the pressure in the battery cavity is uniformly distributed to the air electrode, and the influence on the electrode is reduced; the cylindrical structure cavity of the cathode is of a circular symmetrical structure, the electron transfer path from the cathode to the anode is consistent, and the battery cannot generate overheating phenomenon inside, so that the battery runs more stably.

Of course, it is not necessary for any product in which the utility model is practiced to achieve all of the above-described advantages at the same time.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a first schematic structural diagram of a battery unit according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a battery unit according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram three of a battery unit provided in the embodiment of the present invention;

fig. 4a and 4b are schematic views illustrating an assembly of a grid framework and a battery shell according to an embodiment of the utility model;

fig. 5 is a first schematic view illustrating the assembly of two battery unit bodies according to an embodiment of the present invention;

fig. 6 is a second schematic view illustrating the assembly of two battery unit bodies according to an embodiment of the present invention;

fig. 7 is a second schematic view illustrating an assembly of a grid framework and a battery case according to an embodiment of the present invention;

FIG. 8 is a schematic view of a grid framework structure provided by an embodiment of the present invention;

FIG. 9 is a schematic view of an assembly of a conductive tab provided by an embodiment of the present invention;

fig. 10 is a schematic view showing the assembly of two battery unit bodies through flanges according to an embodiment of the present invention;

fig. 11 is a schematic diagram of two battery unit bodies assembled by a coupling according to an embodiment of the present invention;

fig. 12 is a schematic view illustrating the assembly of two battery unit bodies by screw-fitting according to an embodiment of the present invention;

fig. 13 is a schematic view of three current collector conductive structures provided in an embodiment of the present invention;

fig. 14 is a cross-sectional view of a battery cell unit according to an embodiment of the present invention;

fig. 15 is an exploded view of a battery cell body according to an embodiment of the present invention;

fig. 16 is a schematic structural diagram of a battery unit according to an embodiment of the present invention;

fig. 17 is an assembly view of a plurality of battery cell units according to an embodiment of the present invention.

In the figure:

100. a battery body; 1. a battery case; 2. a grid framework; 2a, a grid monomer; 2a1, arc boss; 201. seaming;

3. an air electrode; 4. a current collector; 5. an upper cover body; 6. a lower cover body; 7. a support framework; 8. an upper joint; 9. a lower joint; 10. a grille lock;

11. a fastening hole; 12. a fastening member; 13. a card slot; 14. a conductive connecting sheet; 15. a semicircular coupling; 16. a flange plate; 17. Fixing the stud;

20. bending the conducting strip; 21. an external thread conductive post; 22. an internal thread conductive column; 23. a liquid outlet; 24. a liquid inlet;

25. a mounting seat; 26. an electrode column; 27. a metal negative electrode; 271. a linker portion; 272. an extension portion; 28. a second cavity;

151. a raised edge; 501,601, a blank holder part; 801. a first connecting ring; 901. a second connecting ring.

Detailed Description

To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The utility model will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments.

Embodiments of the present disclosure provide a battery cell body structure to solve or at least partially solve the structural defects of the above-described prismatic battery cell. Some example embodiments will now be described with reference to fig. 1-17. Note that in the following description, it is possible to use "fuel cell" as an example of exemplary implementation. The scope of the present disclosure is not so limited and any cell body structure capable of employing the cell body described herein is intended to be within the scope of the present disclosure.

As shown in fig. 1, 2, and 3, a battery cell structure according to an embodiment of the present disclosure generally includes a battery body 100, and an air electrode 3 and a current collector 4 mounted in the battery body 100.

The cell body 100 is a basic unit constituting a fuel cell, and a plurality of cell bodies 100 are connected in series or in parallel to form an integrated fuel cell module. A single battery monomer can also utilize oxygen as an oxidant to generate chemical reaction, and chemical energy is converted into electric energy. The battery body 100 in this example is configured as a ring-shaped hollow structure, and is mainly used for storing an electrolyte or a solid metal negative electrode. The upper end of the battery body 100 has an upper tab 8 and/or the lower end of the battery body has a lower tab 9 so that a sealed and detachable connection is achieved between the adjacent two battery unit cells.

In a possible embodiment, the battery body 100 is integrally constructed as a cylindrical tube structure, so that compared with the existing square battery body design, the cylindrical battery cell has higher strength and better pressure resistance; the flow resistance of the electrolyte in the battery body is smaller. On the other hand, cylindrical structure leakproofness is good, but the level is placed and vertical placing, has improved the diversified design demand of product greatly, can design the development according to the product requirement of difference.

The air electrode 3 is mainly used as a positive electrode for the reaction of the battery body 100 and is generally arranged on the side surface of the battery body; since the structure of the battery body in this example is considered to be cylindrical, the air electrode 3 is configured to be symmetrical with the axis Q of the battery body and is mounted inside the battery body so that it can conform to the outer shape of the battery body, improving the strength of the air electrode 3.

The current collector 4 is arranged on the air electrode 3 and is mainly used for guiding the air electrodes 3 of the two adjacent battery bodies 100 and connecting the two adjacent air electrodes in parallel, so that the reaction area of the air electrode of the battery is increased, and the power of the battery is increased. The shape and size of the current collector 4 may be set according to the size and position of the air electrode 3 in the battery body 100 as long as the above-described object can be achieved.

As shown in fig. 1, in some embodiments, the battery body 100 is a cylindrical structure formed by the battery case 1 and the grid skeleton 2.

Specifically, in one possible embodiment, the battery case 1 has an upper tab 8 and a lower tab 9, wherein the upper tab 8 has a circular ring-shaped structure, and an inner circumferential side of the upper tab 8 is provided with an internal thread; the lower joint 9 is also annular, and the outer periphery of the lower joint 9 has a male screw. For two adjacent battery bodies 100, the upper joint 8 and the lower joint 9 can be in threaded connection, so that the two adjacent battery monomers can be detachably connected; further, a sealing ring, a sealing gasket or a sealing glue can be added at the connecting part of the upper joint 8 and the lower joint 9 to realize sealing, for example, the sealing effect is realized by fastening the compression sealing gasket through threads.

In another possible embodiment, as shown in fig. 10, the upper connector 8 and the lower connector 9 may be two flanges 16 that are engaged with each other, holes are punched on the edges of the flanges 16, and the flanges 16 are connected up and down by fixing studs 17, so as to connect the battery cells in parallel.

In another possible embodiment, as shown in fig. 11, the upper tab 8 and the lower tab 9 may be connected by a semicircular clip 15, which is provided with a protruding edge 151, and a quick connect chuck is provided with a C-shaped groove, and the semicircular clip 15 is matched with the protruding edges of the upper and lower tabs to lock the upper and lower tabs to connect the battery unit.

In the embodiment, through the design of the loose joint, the attribute characteristics of the single battery are changed, so that the battery is higher in universality and has good expansibility. The structure is suitable for static fuel cells and can also be used for dynamic flow fuel cells. Although the connection between two adjacent battery bodies 100 is realized by means of screw fitting, flange fitting and clamp fitting in the embodiment; it will be appreciated by those skilled in the art that other means may be employed to achieve the above technical objectives and that such means are intended to be included within the scope of the present invention and are not intended to be limiting.

Further, as shown in fig. 1 and 3, the battery body 100 in this example has at least three forms. First, the upper end of the battery body 100 has an upper tab 8, wherein the upper tab 8 is for fitting with the lower tab 9 of the battery body 100 adjacent thereto; the lower end of the battery body 100 is hermetically provided with a lower cover 6, and the first battery body is generally used as the rear of the battery module. The second is a battery body 100 having an upper terminal 8 at the upper end and a lower terminal 9 at the lower end, and generally serving as the middle part of the battery module. Thirdly, the lower end of the battery body 100 is provided with a lower tab 9, wherein the lower tab 9 is adapted to be assembled with the upper tab 8 of the adjacent battery body, the upper end of the battery body 100 is hermetically provided with the upper cap member 5, and the third battery body generally serves as the head of the battery module. It should be understood that when the battery cell body structure 100 is used alone as a battery, an upper terminal may be hermetically provided at the upper end thereof and a lower terminal may be hermetically provided at the lower end thereof.

In one possible embodiment, as shown in fig. 3, the upper cover 5 is provided with a liquid outlet 23 at the periphery thereof, and a liquid inlet 24 is provided at the bottom of the lower cover 6. When the cell module is used as a static fuel cell, the liquid outlet 23 and the liquid inlet 24 are sealed. When the battery module is used as a dynamic liquid flow fuel cell, the liquid outlet 23 and the liquid inlet 24 are connected with an electrolyte circulating liquid cooling system, wherein the electrolyte circulating liquid cooling system is used for flowing electrolyte in the battery module and controlling the temperature of the electrolyte in the discharging process.

In some embodiments, the upper connector 8 and the lower connector 9 in the battery case 1 are fixedly connected through the supporting framework 7, and the grid framework 2 is sleeved or embedded on the battery case 1. The grid framework 2 and the battery cells have a common axis Q; the grid frame 2 is used to fix the air electrode 3 inside or outside the battery case 1.

As shown in fig. 1 and 2, when the grid framework 2 is integrally provided, the whole grid framework is a circular ring. The grid framework 2 is distributed with grids composed of horizontal bars and vertical bars, and the side surface of the grid framework is provided with a seam 201, so that the grid framework 2 is conveniently propped open, a first connecting ring 801 is formed on the periphery of the upper joint 8, a second connecting ring 901 is formed on the periphery of the lower joint, and the grid framework 2 is propped open and sleeved in the battery shell 1. Wherein, the upper end of the grid framework 2 abuts against the first connecting ring 801, and the lower end of the grid framework 2 contacts with the second connecting ring 901. It should be understood that the first and second connection rings may also be formed inside the battery case 1 so as to facilitate the insertion of the grid skeleton 2 provided in the battery case 1.

It should be noted that, in the operation process of the square battery structure, the temperature of the electrolyte is about 50-60 degrees, the air electrode is fixed through the external grid, and the air electrode is concave or convex due to long-time operation, and the phenomenon is that the air electrode is subjected to stress change due to cold and hot shrinkage on the surface of the air electrode caused by cold and hot change in the operation process of the battery, and the change cannot be repaired, so that the distribution of a thermal field and a flow field in the battery is finally influenced.

As shown in fig. 1,6 and 12, in order to solve the above problem, in this example, the air electrode 3 is made into an arc shape, one side of the grid framework 2 is provided with a clamping groove 13 matched with the outer shape of the air electrode 3, the edge of the clamping groove 13 protrudes to be consistent with the basic thickness of the air electrode, the air electrode 3 is installed in the clamping groove 13, the up-down and left-right moving directions of the air electrode 3 are limited, and the air electrode and the external grid framework 2 of the arc-shaped air electrode are made into an integral structure. On one side of the grid framework 2, the upper joint 8 and the lower joint 9 are provided with edge pressing parts 501,601 corresponding to the clamping grooves 13 for better fixing the air electrode 3; the clamping groove 13 and the edge pressing portions 501 and 601 are used together for fixing the air electrode 3. The air electrode 3 is fixed in shape in advance, so that the subsequent external grid framework can be conveniently fixed with the battery shell 1. According to the air electrode, the air electrode and the circular outer grids are combined to form the circular arc structure, so that the strength of the air electrode is greatly improved, the air electrode cannot be sunken inwards, the internal liquid pressure of the battery cavity acts outwards on the air electrode when the battery operates, and the pressure in the battery cavity is uniformly distributed on the surface of the air electrode, so that the influence on the electrode is reduced, and the battery operation is facilitated.

In other embodiments, as shown in fig. 2, the grid frame 2 is provided as a separate body, the grid frame 2 is formed by splicing two sets of grid single bodies 2a, and the air electrode 3 is also configured as a semicircular structure corresponding to the grid single bodies 2a, wherein the air electrode 3 is configured as a symmetrical structure with respect to the axis Q of the battery body.

The grid framework 2 is detachably connected with the supporting framework 7 through a fastening component. Specifically, as shown in fig. 7, the fastening assembly includes arc-shaped bosses 2a1, the arc-shaped bosses are distributed on the side edges of the grid single bodies 2a, and the arc-shaped bosses 2a1 on two adjacent grid single bodies 2a jointly form a fastening hole 11; the grid lock 10 is of a circular ring structure and is used for connecting two adjacent grid single bodies 2a, and the grid lock 10 is embedded in the fastening hole 11; one end of the fastening component 12 penetrates through the grid lock and is used for fixedly pressing the grid single body 2a on the supporting framework 7, and the fastening component 12 is a self-tapping screw in the example. Through the assembly of realization grid skeleton 2 and battery case 1 that above-mentioned fastener can be better, the air electrode 3 of being convenient for combines with the outer grid of circular shape to form the higher circular arc structure of intensity, has further improved air electrode's intensity. It should be understood by those skilled in the art that the grid framework 2 and the battery shell can be mounted by means of adhesion, welding and the like, and the utility model is not limited thereto.

As shown in fig. 13 and 9, in some embodiments, the current collector 4 is a long strip-shaped plate-shaped structure, which is welded with the air electrode 3, and is used for collecting the current of the air electrode onto the conductive connecting sheet and connecting the conductive connecting sheet in parallel or in series with the next cell body. The end of the current collector 4 is provided with a conductive part, and the conductive parts between two adjacent batteries are connected through an external conductive connecting sheet 14. In a specific implementation process, as shown in fig. 13(a), the conductive portion may be a bent conductive sheet 20 of the current collector, which is provided at an end of the current collector, and the bent conductive sheet 20 is welded to the conductive connection pad 14; as shown in fig. 13(b), the conductive part may also be a current collector end part provided with a current collector inlaid external thread conductive column 21, which is welded with the conductive connecting sheet 14; as shown in fig. 13(c), the conductive part may also be a current collector end provided with a current collector inlaid internal thread conductive column 22, which is welded with the conductive connecting sheet 14.

As shown in fig. 14 and 15, in some embodiments, the upper joint 8 is provided with an upper cover 5 hermetically therein; a metal cathode 27 is detachably mounted in the upper cover body 5; alternatively, the lower cap 6 is hermetically provided in the lower tab 9, and the metal negative electrode 27 is provided in the lower cap 6. It should be understood that the metal negative electrode 27 herein can participate in electrochemical reactions, whether located in the upper cover or the lower cover, to effect discharge of the battery.

Specifically, the metal negative electrode 27 has a joint portion 271 and an extending portion 272 integral with the joint portion 271; the extension part is of a cylindrical structure, is positioned in the center of the battery body and is of a cylindrical structure, and keeps an equidistant gap with the air electrode (3). The upper cover body 5 is screwed with the mounting seat 25, a threaded hole is formed below the mounting seat 25, the external thread of the joint part 271 is matched with the threaded hole to realize the detachable assembly of the metal cathode, and the electrode column 26 is arranged above the mounting seat 25 and used for conducting electricity.

When applied to a static fuel cell, the end of the extension portion has an opening, forming a first cavity at the metal cathode 27; a second cavity 28 is formed between the air electrode 3 and the metal cathode 27; the electrolyte may flow from the second cavity 28 to the first cavity. The cylindrical cavity of the metal cathode is of a symmetrical structure, the lengths of electron transfer paths from the cathode to the anode are consistent, and the interior of the battery cannot generate an overheating phenomenon, so that the battery can run more stably; through the design of fluid type, electrolyte distributes more evenly in battery body 100, and when discharging, the electrode fully contacts with electrolyte, can increase discharge efficiency, and in addition, the design of fluid type, the thermal field evenly distributed of being convenient for helps the heat dissipation.

The ends of the extensions remain sealed when applied to a dynamic flow fuel cell. And a second cavity 28 is formed between the air electrode 3 and the metal cathode 27, and the electrolyte is guided by a circulating liquid cooling system, circulates in the battery module and controls the temperature of the electrolyte in the discharging process.

As shown in fig. 17, the present example also provides a metal fuel cell formed by combining a plurality of the single cell bodies 100 as shown in fig. 16 described above, and injecting an electrolyte into the cell module to form the metal fuel cell. When the battery module is used as a static fuel cell, the battery module is in a sealed state. When the battery module is used as a dynamic liquid flow fuel battery, the liquid outlet 23 is connected with an electrolyte circulating liquid cooling system, wherein the electrolyte flows in the circulating liquid cooling system to control the temperature of the electrolyte. According to the battery monomer with the modular design, the number of the battery unit body structures can be selected to be assembled according to product requirements, so that the overall output power and the battery capacity of the metal fuel battery are improved.

It should be understood that the diameter of the cylinder is proportional to the side length of the air electrode, the current collector is arranged in the middle of the air electrode, the air electrode is surrounded by an arc-shaped structure, and the electron migration paths converge from the air electrode to the current collector in the discharge process, so that the smaller the diameter of the cylinder, the shorter the circumference, the shorter the electron migration path, the stronger the overcurrent capability, and the smaller the internal resistance. The diameter of the cylinder is unchanged, the height of the air electrode is increased, the reaction area is increased along with the increase of the height of the air electrode, and the reaction area is increased by 10% for each 1cm of the height of the air electrode. Through multiple experiments, the utility model discloses a battery body 100, the height of the air electrode 3 is 10-20 cm; when the diameter of the cylinder of the battery unit body is 4-10cm, the output efficiency of the formed battery module is optimal.

As can be seen from Table 1, at 1m²The total number of the cylindrical batteries of the array in the area is compared under the condition of the same height according to different diameters of the cylinders, and the air electrode reaction area of the single battery can be obtained. Calculating the output power of the single battery at 1m through the current density²Are compared within the area of (a).

The output power of the cylindrical batteries with different sizes is different. The smaller the diameter of the cylinder is, the more the arrangement quantity is, and the larger the total power is; the larger the diameter, the smaller the number of arrays, and the smaller the total power. In the case of the single-layer arrangement, as shown in the graph, the design method of the present invention is adopted, and the battery structure is connected in parallel up and down, so that the output power of the battery is increased by 1 time, 2 times and 3 times. When the occupied area is kept unchanged, the overall output power of the metal fuel cell can be improved by increasing the height, and the design idea of highly integrating high-power output of the metal fuel cell is realized.

TABLE 11 reference table for battery arrangement number and corresponding total power in square meter

As can be seen from Table 2, the air electrode reaction area is obtained by calculating the diameter of the cylinder and the height of the cylinder. The combination of tables 1 and 2 shows that the circumference of the cylindrical battery increases with the increase of the diameter, the area of the air electrode increases with the increase of the height, but the height and the diameter cannot be infinitely increased, and the height of the air electrode in the single battery does not exceed 20cm at most in combination with practical conditions.

The utility model increases the area of the air electrode by expanding connection to improve the output power of the battery. It can be seen in the table of the figure that extending the air electrode height of 15cm to 30cm doubles the output power of the cell.

TABLE 2 reference table for reaction area volume and power of cylindrical unit battery

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

It should also be noted that the terms "a," "an," "two," and the like in the description and claims of this application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the utility model, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A battery cell body structure, comprising:

a battery body configured as a ring-shaped hollow structure; and the upper end of the battery body is provided with an upper joint (8) and/or the lower end of the battery body is provided with a lower joint (9), and the upper joint and the lower joint are detachably connected;

an air electrode (3) mounted on the side surface of the battery body; and the air electrode (3) is configured to be symmetrical with the axis Q of the battery body;

a metallic negative electrode (27) in the battery body;

and the current collector (4) is arranged on the air electrode (3) and used for guiding the air electrodes (3) of the two adjacent battery bodies.

2. A battery cell body structure according to claim 1, wherein:

the battery body comprises a battery shell (1) and a grid framework (2); the battery shell (1) is sleeved or embedded with a grid framework (2); the grid skeleton (2) and the battery body have a common axis Q;

the grid framework (2) is used for fixing the air electrode (3) on the inner side or the outer side of the battery shell (1).

3. A battery cell body structure according to claim 2, wherein:

the air electrode (3) is arc-shaped, and a clamping groove (13) matched with the air electrode (3) in shape is arranged on one side of the grid framework (2);

the upper joint (8) and the lower joint (9) are provided with edge pressing parts (501,601) corresponding to the clamping grooves (13) on one side of the grid framework; the clamping groove (13) and the crimping parts (501,601) are used for fixing the air electrode (3).

4. A battery cell body structure according to claim 1, wherein:

the current collector (4) is provided with a conductive part, and the conductive parts between two adjacent battery bodies are connected through an external conductive connecting sheet (14).

5. A battery cell body structure according to claim 2, wherein:

the battery shell (1) is provided with a supporting framework (7);

the grid framework (2) is arranged integrally or in a split mode, and the grid framework (2) is detachably connected with the supporting framework (7) through a fastening assembly.

6. The battery unit body structure according to claim 5, wherein the grid framework (2) comprises at least two groups of grid single bodies (2a) which are spliced;

the fastening assembly comprises:

the grid structure comprises arc-shaped convex seats (2a1), wherein the arc-shaped convex seats are distributed on one side of a grid single body (2a), and the arc-shaped convex seats (2a1) on two adjacent grid single bodies (2a) jointly form a fastening hole (11);

a grid lock (10) embedded in the fastening hole; and

and one end of the fastening component (12) penetrates through the grid lock and is used for fixing the grid single body (2a) on the supporting framework (7).

7. A battery cell body structure according to claim 1, wherein:

an upper cover body (5) is hermetically arranged in the upper joint (8); a metal cathode (27) is detachably mounted in the upper cover body (5);

or a lower cover body (6) is hermetically arranged in the lower joint (9), and a metal cathode (27) is arranged in the lower cover body (6).

8. A battery cell body structure according to claim 7, wherein:

the metal negative electrode (27) is provided with a joint part (271) and an extending part (272) which is integrated with the joint part (271); the extension part is located at the center of the battery body and is of a cylindrical structure, and the extension part and the air electrode (3) keep an equidistant gap.

9. A battery cell body structure according to claim 8, wherein:

the end of the extension portion has an opening, and a first cavity is formed in the metal negative electrode (27); a second cavity (28) is formed between the air electrode (3) and the metal negative electrode (27); or

The ends of the extension are sealed; a second cavity (28) is formed between the air electrode (3) and the metal cathode (27).

10. A metal fuel cell, comprising: a battery cell body structure as claimed in any one of claims 1-9.

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