WO2021238811A1

WO2021238811A1 - Metal-air battery

Info

Publication number: WO2021238811A1
Application number: PCT/CN2021/095305
Authority: WO
Inventors: 易祖成; 吴辉
Original assignee: 湖南西瑞尔新材料科技有限公司
Priority date: 2020-05-25
Filing date: 2021-05-21
Publication date: 2021-12-02
Also published as: CN212033096U

Abstract

Disclosed in the present invention is a metal-air battery, comprising: a base housing, having a cavity, and an upper end of an outer wall being provided with a snap groove; two first air electrode films, attached to a front side and a rear side of the cavity and coming in contact with external air; two side plates, configured to press the first air electrode films to achieve sealing of the front side and the rear side of the cavity; a metal electrode cover, a metal electrode plate inserted into the cavity being provided at a bottom thereof; and a base cover, a snap member engaged with the snap groove being movably provided on an outer wall thereof. In the present invention, an upper end of the cavity is sealed by means of the metal electrode cover, the metal electrode plate is inserted into the cavity, and when the metal electrode plate needs to be replaced, it is only required to directly take out the metal electrode cover; position fixing of the metal electrode cover and sealing of the cavity are realized by means of the abutment of the base cover, the base cover is fastened on the base housing by means of the snap member, and disassembly of the base cover can be achieved only by disengaging the snap member from the snap groove; the metal electrode cover can be directly taken out due to the fact that the metal electrode cover is not connected by means of a fastener, and therefore, replacement of the metal electrode plate is convenient and simple.

Description

A metal-air battery

Technical field

The present invention relates to the field of batteries, in particular to a metal-air battery.

Background technique

Metal-air batteries use metals with relatively negative electrode potentials, such as magnesium, aluminum, zinc, mercury, iron, etc., as the negative electrode, and oxygen or pure oxygen in the air as the positive electrode. It has the advantages of high specific energy, low price and stable performance.

The metal-air battery usually has an accommodating cavity to contain the electrolyte solution, and the metal electrode plate is inserted into it. The metal electrode plate is a consumable and needs to be replaced frequently. In the traditional metal-air battery, it is troublesome to replace the metal electrode plate and the operation is cumbersome.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, the present invention proposes a metal-air battery, which can easily replace the metal electrode plate.

A metal-air battery according to an embodiment of the first aspect of the present invention includes: a base case with a cavity, and an upper end of the outer wall has a buckle groove, the front and rear sides of the cavity and the upper end are both openings; two first air electrode films, It is attached to the front and rear sides of the cavity and is in contact with the outside air; two side plates are respectively connected to the front and rear sides of the base shell for pressing the first air electrode film to seal the front and rear sides of the cavity; the metal electrode cover, The cover is arranged at the opening at the upper end of the cavity, and the bottom is provided with a metal electrode plate inserted into the cavity; the base cover, the outer wall is movably provided with a buckle matching the buckle groove, and the buckle is buckled in the buckle groove to realize the base cover and the base shell Connect and press the metal electrode cover to achieve the sealing of the upper end of the cavity.

A metal-air battery according to an embodiment of the present invention has at least the following technical effects: the upper end of the cavity is covered by a metal electrode cover, and the metal electrode plate is inserted into the cavity. When the metal electrode plate needs to be replaced, the metal is directly taken out. The electrode cover is sufficient, and the metal electrode cover realizes the position fixation and the sealing of the cavity through the pressing of the base cover. The base cover is buckled on the base shell by a buckle, and the buckle is only required to be released from the buckle groove to realize the base cover Disassembly, and because the metal electrode cover is not connected by fasteners, it can be taken out directly, and it is convenient and simple to replace the metal electrode plate.

According to some embodiments of the present invention, the base housing includes two half-shells, the two half-shells are symmetrically arranged and connected by fasteners, and the two first air electrode membranes are attached to the two half-shells. On the opposite side.

According to some embodiments of the present invention, a second air electrode film is installed on the opposite sides of the two half-shells, and the half-shells and the corresponding first air electrode film and the second air electrode film form an electrolyte accommodating cavity, The two half shells are formed with a first vent hole between the two second air electrode films so that the second air electrode film can be in contact with external air.

According to some embodiments of the present invention, the upper end of the base case has a sunken first bonding surface, the metal electrode cover is bonded to the first bonding surface, and a first sealing ring is embedded in the first bonding surface .

According to some embodiments of the present invention, the base cover includes a top cover and a bottom cover, the bottom cover is connected to the bottom of the top cover, and the bottom of the bottom cover abuts against the metal electrode cover and presses the metal electrode cover.

According to some embodiments of the present invention, the middle of the metal electrode cover has a first protrusion protruding upward, the first protrusion passes through the bottom cover, and the center of the first protrusion has a through liquid filling port, The top cover is provided with a downwardly convex sealing protrusion corresponding to the first protrusion, and the sealing protrusion abuts against the first protrusion and seals the filling port.

According to some embodiments of the present invention, the bottom cover is provided with an upwardly protruding second protrusion corresponding to the sealing protrusion, and the center of the second protrusion has a central hole for the first protrusion to penetrate. The bottom of the protrusion is at least partially embedded in the second protrusion.

According to some embodiments of the present invention, a second sealing ring is sandwiched between the sealing protrusion and the first protrusion.

According to some embodiments of the present invention, the outer end edge of the opening at the front and rear sides of the cavity has an annular bonding surface for bonding the first air electrode film, and the side plate is provided with the side facing the opening with the The annular pressing surface corresponds to the annular pressing surface, the annular pressing surface is provided with a number of blind holes, the side plate is provided with a second vent hole, and the second vent hole is located in the surrounding of the annular pressing surface Within the range; a compression frame is sandwiched between the annular pressing surface and the annular bonding surface, and the compression frame is used to press the first air electrode under the pressing of the annular pressing surface of the side plate The membrane is compressed on the annular fitting surface; a pre-tensioning spring is installed in the blind hole, and the pre-tensioning spring is used to apply an elastic pre-tensioning force to the compression frame to push it to the annular fitting surface.

According to some embodiments of the present invention, the compression frame protrudes toward the side plate and is formed with a positioning post corresponding to the blind hole, and the positioning post is inserted into the blind hole and can extend along the blind hole. slide.

The additional aspects and advantages of the present invention will be partially given in the following description, and some will become obvious from the following description, or be understood through the practice of the present invention.

Description of the drawings

The present invention will be further described below in conjunction with the drawings and embodiments.

FIG. 1 is a schematic diagram of the structure in an exploded state of an embodiment of the present invention;

Figure 2 is an internal cross-sectional view of an embodiment of the present invention;

Figure 3 is a schematic diagram of the exploded structure of the base cover;

Figure 4 is an internal cross-sectional view of the base cover;

Figure 5 is a schematic diagram of the structure of the base shell in an exploded state;

Figure 6 is a schematic diagram of the structure of the half shell;

Figure 7 is a schematic diagram of the structure of the side plate and the compression frame;

Figure 8 is a structural schematic diagram of the side plate, the compression frame and the pre-tensioned spring in an exploded state;

Figure 9 is a schematic diagram of the structure of the compression frame;

Figure 10 is a schematic view of the front structure of the side plate;

Fig. 11 is an enlarged view of A in Fig. 2;

Fig. 12 is an enlarged view of B in Fig. 2.

Reference signs:

The base shell 100, the half shell 101, the first bonding surface 102, the cavity 110, the buckle groove 120, the mounting plane 130, the second mounting hole 131, the limiting hole 132, the third screw 133, the second step surface 140, the first A sealing ring 141, a supporting plate 150, a first step surface 160, a first vent 170, a closed cavity 180, and an electrolyte containing cavity 190;

Side plate 200, pressure frame 210, blind hole 211, vent 212, pressure frame inner surface 213, second vent 220, stiffener 230, limiting protrusion 240, mounting surface 241, first mounting hole 250. Compression frame 260, positioning post 261, spring accommodating groove 262, pre-tensioning spring 270, hand-pull groove 280, nameplate installation groove 290;

The first air electrode film 300; the metal electrode cover 400, the metal electrode plate 410, the first protrusion 420, the filling port 421, the first sealing ring 430;

Base cover 500, buckle 501, top cover 510, sealing protrusion 511, second connecting hole 512, bottom cover 520, second protrusion 521, threaded mounting hole 522, center hole 523, second screw 530, second seal Circle 540;

The second air electrode film 600.

Detailed ways

The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present invention, but should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Axial", "Radial", "Circumferential" The orientation or positional relationship of the other indications is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the pointed device or element must have a specific orientation or a specific orientation. The azimuth structure and operation cannot be understood as a limitation of the present invention. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that the terms "installation", "connection", and "connection" should be interpreted broadly unless otherwise clearly specified and limited. For example, they can be fixed or detachable. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present invention can be understood in specific situations.

1 to 12, a metal-air battery according to an embodiment of the present invention, the base case 100 has a cavity 110, and the upper end of the outer wall has a buckle groove 120, the front and rear sides and upper ends of the cavity 110 are open, and the buckle groove 120 is provided On the left and right side walls of the base shell 100.

The two first air electrode films 300 are attached to the front and rear sides of the cavity 110 and are in contact with the outside air; the two side plates 200 are respectively connected to the front and rear sides of the base shell 100 for pressing the first air electrode films 300 to achieve alignment. The front and rear sides of the cavity 110 are sealed; the side plate 200 is detachably installed on the base shell 100 by fasteners.

The metal electrode cover 400 is disposed at the opening at the upper end of the cavity 110, and a metal electrode plate 410 inserted into the cavity 110 is provided at the bottom. The outer wall of the base cover 500 is movably provided with a buckle 501 matching the buckle groove 120. The buckle 501 is buckled in the buckle groove 120 to realize the connection between the base cover 500 and the base case 100, and the metal electrode cover 400 is pressed to achieve the cavity Seal at the upper end of 110. The design of the buckle 501 and the buckle groove 120 facilitates the disassembly of the base cover 500.

For the metal-air battery provided by the embodiment of the present invention, when the metal electrode plate 410 needs to be replaced, the metal electrode cover 400 can be directly taken out, and the metal electrode cover 400 is pressed by the base cover 500 to achieve position fixation and sealing of the cavity. The cover 500 is buckled on the base shell 100 by a buckle, and the buckle can be removed from the buckle groove. The metal electrode cover can be taken out directly because it is not connected by fasteners. It is convenient and simple to replace the metal electrode plate. .

Referring to FIG. 5, in some embodiments of the present invention, the base shell 100 includes two half shells 101, the two half shells 101 are symmetrically arranged and connected by fasteners, and the two first air electrode films 300 are attached On the opposite side of the two half-shells 101. Specifically, as shown in FIG. 5, the two half-shells 101 are arranged opposite to each other, and the two half-shells 101 are provided with corresponding first connecting holes 134, and a connecting rod 103 is inserted into the first connecting hole 134. The ends of the rod 103 There are threaded holes, and two first screws 104 correspondingly penetrate through the first connecting holes 134 of the two half-shells 101 and are connected with the threaded holes at the two ends of the round rod 103 and tightened, so that the two half-shells 101 are tightly tightened. Split together to form the base shell 100 and the cavity 110.

In some embodiments of the present invention, the second air electrode film 600 is installed on the opposite sides of the two half-shells 101, and the half-shell 101 and the corresponding first air electrode film 300 and the second air electrode film 600 form an electrolyte containment. Cavities 190, as shown in FIG. 2, each of the two half-shells 101 forms two electrolyte accommodating cavities 190, and the metal electrode plate 410 has a plurality of them and is inserted into the two electrolyte accommodating cavities 190, respectively. Such a plurality of air electrode films 600 and metal electrode plates 410 can increase the power of the battery. The two half shells 101 are formed with a first vent hole 170 between the two second air electrode films 600 so that the second air electrode film 600 can be in contact with the outside air. Specifically, a closed cavity 180 is formed between the second air electrode membrane 600 and the half shell 101, and the first vent 170 allows the closed cavity 180 to communicate with the outside air. The first vent hole 170 is formed by combining the concave holes 171 at the joint of the half shell 101. Specifically, the opposite sides of the two half-shells 101 are provided with a first stepped surface 160 that sinks inward, and the second air electrode film 600 is attached to the first stepped surface 160. In order to achieve a close fit, the two second A pressing member 700 is arranged between the outer circumference of the air electrode film 600. Under the action of the two half-shells 101 being screwed to each other, the pressing member 700 applies pressure to the second air electrode film 600 on both sides to ensure the second air electrode. The film 600 is bonded to the first step surface 160 in a sealed manner.

In some embodiments of the present invention, the upper end of the base shell 100 has a sinking first bonding surface 102, that is, the upper end of the base shell 100 has a sinking step, and the metal electrode cover 400 is embedded in the sinking step and is attached to the first A bonding surface 102, and the first bonding surface 102 is embedded with a first sealing ring 430, the sealing effect can be ensured by the bonding of the metal electrode cover 400 to the first bonding surface 102 and the first sealing ring 430 .

In some embodiments of the present invention, the base cover 500 includes a top cover 510 and a bottom cover 520. The bottom cover 520 is connected to the bottom of the top cover 510. The cover 520 is embedded in the step at the upper end of the base shell 100, and the buckle 501 is pivotally connected to the left and right sides of the top cover 510 through a pivot shaft. Specifically, the bottom cover 520 and the top cover 510 form a cavity, which is used to place the electrical control components of the metal-air battery and serve as a circuit integration area. The air electrode film and the metal electrode plate 410 both pass through the corresponding structure through conductive wires. Enter into the cavity for corresponding arrangement.

As shown in FIG. 4, a number of threaded mounting holes 522 are provided around the bottom cover 520, and the top cover 510 is correspondingly provided with a second connecting hole 512. The second screw 530 is connected in the threaded mounting hole 522 and penetrates the second connecting hole 512. The diameter of the second connecting hole 512 is larger than that of the second screw 530. The part where the second screw penetrates into the second connecting hole 512 is covered with a rubber sleeve 531. The rubber sleeve 531 is connected with the second connecting hole 512 by interference fit to realize the bottom cover 520. And the connection of the top cover 510. When disassembling, the second screw 530 does not need to be screwed, only the tightening force is overcome, and the bottom cover 520 and the top cover 510 are separated, which is convenient for disassembly.

In some embodiments of the present invention, the middle of the metal electrode cover 400 has a first protrusion 420 protruding upward, the first protrusion 420 passes through the bottom cover 520, and the center of the first protrusion 420 has a through liquid filling port 421. The liquid filling port 421 is in communication with the cavity 110. Specifically, the liquid filling port 421 is in communication with the electrolyte accommodating cavity 190 to facilitate the addition of electrolyte liquid. The top cover 510 is provided with a sealing protrusion 511 protruding downward corresponding to the first protrusion 420, and the sealing protrusion 511 abuts against the first protrusion 420 to seal the filling port 421. When the top cover 510 is removed, liquid can be added to the inside without removing the metal electrode cover 400, which is more convenient.

As shown in FIG. 12, the bottom surface of the metal electrode cover 400 is provided with a clamping block 440 corresponding to the metal electrode plate 410. The upper end of the metal electrode plate 410 is inserted into the clamping block 440, in order to provide better support for the metal electrode plate 410 and avoid metal electrodes. The plate 410 is separated from the clamping block 440, the bottom of the cavity 110 is provided with a supporting plate 150 corresponding to the metal electrode plate 410, and the supporting plate 150 is provided with a V-shaped groove for the metal electrode plate 410 to be embedded.

In a further embodiment of the present invention, a second sealing ring 540 is sandwiched between the sealing protrusion 511 and the first protrusion 420 to improve the sealing effect.

In some embodiments of the present invention, the bottom cover 520 is provided with a second protrusion 521 protruding upward corresponding to the sealing protrusion 511, and the center of the second protrusion 521 has a central hole 523 for the first protrusion 420 to penetrate. The bottom of the sealing protrusion 511 is at least partially embedded in the second protrusion 521. The cooperation of the second protrusion 521 and the sealing protrusion 511 can achieve a certain positioning effect when the bottom cover 520 and the top cover 510 are installed in position.

In some embodiments of the present invention, the outer edges of the openings on the front and rear sides of the cavity 110 have a circular bonding surface for bonding the first air electrode film 300, and the side plate 200 is provided with a circular bonding surface on the side facing the opening. The ring-shaped pressing surface corresponding to the mating surface, the ring-shaped bonding surface surrounds the outer edge of the opening, and the first air electrode film 300 and the ring-shaped bonding surface are in close contact to seal the cavity side wall.

The annular pressing surface is provided with a number of blind holes 211, the side plate 200 is provided with a second vent hole 220, the second vent hole 220 penetrates the side plate 200, and the second vent hole 220 is located in the surrounding range of the annular pressing surface. The air hole 220 is used to pass external air into the surface of the first air electrode film 300; a pressing frame 260 is sandwiched between the annular pressing surface and the annular bonding surface, and the outline of the tight frame 260 corresponds to the annular bonding surface. And the contour of the inner ring of the compression frame 260 matches the corresponding opening edge. The pressing frame 260 is located between the annular pressing surface and the annular bonding surface, and the pressing frame 260 is used to press the first air electrode film 300 on the annular bonding surface under the pressing of the annular pressing surface of the side plate 200 , The sealed connection of the first air electrode film 300 is realized. A pre-tensioning spring 270 is installed in the blind hole 211, and the pre-tensioning spring 270 is used to apply an elastic pre-tensioning force to the pressing frame 260 to push it to the annular contact surface.

Use the ring-shaped bonding surface to bond the first air electrode film to ensure a good seal bonding, and use the ring-shaped pressing surface to press the compression frame against the first air electrode film to make the first air electrode film tightly close to the ring-shaped bonding surface To achieve a good seal; and because they are all face-to-face, the force distribution is balanced, and the sealing effect will not deteriorate due to partial depression and deformation caused by the point force; coupled with the action of the pre-tension spring, when the side plate When the connection is slightly loosened and the compression frame and the first air electrode membrane are no longer tightly compressed, the pre-tensioning spring can provide a good pre-tensioning force, so that the compression frame still compresses the air battery membrane, unlike the prior art, When the side plate is slightly loosened, it will lose its pressing effect on the first air electrode membrane; in addition, the outward pushing force of the spring on the side plate will hold the side plate tight and play a certain role in preventing loosening; this application can be very good Prevent loosening and leakage, and improve sealing performance.

In some embodiments of the present invention, the annular bonding surface is a second step surface 140 formed by recessing the outer end surface of the opening edge inward, that is, a step plane formed by a step that sinks inward. As shown in FIG. 3, the air battery film 300 is embedded in the step formed by the recess and is attached to the second step surface 140. The step can limit the air battery film 300 and improve its installation accuracy.

In some embodiments of the present invention, the base shell 100 is provided with a mounting plane 130 on the peripheral side of the opening. Specifically, the mounting plane 130 is provided on the left and right sides, and the side plate 200 is provided with mounting fittings corresponding to the mounting plane 130. The surface 241, the mounting surface 241 and the mounting plane 130 are provided with corresponding mounting holes to be connected and fixed by fasteners. Specifically, a number of first mounting holes 250 are provided on the mounting surface 241, and a number of second mounting holes 131 are correspondingly provided on the mounting plane 130. The first mounting holes 250 and the second mounting holes 131 are aligned one by one and are fitted with The third screw 133 and the second mounting hole 131 are threaded holes matching the third screw 133. The close connection between the base shell 100 and the side plates is realized by surface-to-surface bonding. In addition, due to the action of the pre-tensioning spring 270, an outward pushing force can be applied to the third screw 133 to tighten the third screw 133, which can prevent the third screw from loosening, prevent the side plate 200 from loosening, and improve the sealing stability.

In a further embodiment of the present invention, the mounting surface 241 is provided with a raised limiting protrusion 240, and the mounting plane 130 is provided with a limiting hole 132 into which the limiting protrusion 240 is inserted, passing through the limiting protrusion 240 Insert the limit hole 132 to realize the positioning and installation of the side plate 200 and the base shell 100. It is also possible to insert the limit protrusion 240 into the limit hole 132 and then screw the third screw to a certain extent during installation. The installation effect facilitates the alignment of the first installation hole 250 with the second installation hole 131, which makes the installation of the side plate 200 more convenient. It can be understood that the inner end edge of the limiting protrusion 240 is chamfered to facilitate insertion into the positioning hole.

In some embodiments of the present invention, an inwardly recessed groove is provided on the annular bonding surface, and a first sealing ring 141 is embedded in the groove. The first sealing ring 141 improves the air battery membrane 300 and the annular adhesive The sealing performance of the joint surface.

In some embodiments of the present invention, the inner wall of the side plate 200 is provided with a protruding pressing frame 210 corresponding to the annular fitting surface, and the annular pressing surface is the inner surface of the pressing frame 210, that is, as shown in FIG. 5 Frame inner surface 213. The blind hole 211 is formed by the inner surface of the pressing frame 210 extending outward. The blind holes 211 are arranged along the contour of the pressing frame 210.

The second vent hole 220 is located within the frame selection range of the pressure frame 210. The pressure frame 210 protrudes and forms an inwardly opening vent space 201 with the inner wall of the side plate 200. The second vent hole 220 communicates with the vent space 201 to Air is introduced into the ventilation space 201, so that the air is in full contact with the electrode air film 300. Compared with the full bonding of the inner wall of the side plate 200 and the electrode air film, the pressure frame 210 of the present application only presses the side of the electrode air film to form The vented space 201 can increase the contact area between the air and the electrode air film, and improve the battery performance. It can be understood that the opening is rectangular, correspondingly, the first air electrode film is also rectangular, and the pressing frame 210 is a rectangular frame to press the edge of the first air electrode film 300 correspondingly.

In some embodiments of the present invention, the compression frame 260 protrudes toward the side plate 200 to form a positioning post 261 corresponding to the blind hole 211. The positioning post 261 is inserted into the blind hole 211 and can slide along the blind hole 211. The blind hole 211 corresponds to the position of the positioning post 261 and the cross section is matched. The positioning post 261 and the blind hole 211 can realize the alignment installation of the compression frame 260 and the compression frame 210. The cooperation of the positioning post 261 and the blind hole 211 can also realize the sliding guide of the compression frame 260, and improve the stability of the relative position of the two.

In some embodiments of the present invention, the center of the positioning column 261 has a spring accommodating groove 262, the spring accommodating groove 262 is formed by extending the outer end surface of the positioning column 261 inward, and the spring accommodating groove 262 opens outward. It can be understood that the spring accommodating groove 262 is coaxial with the positioning column 261. The pressing frame 260 is a rectangular frame to correspond to the rectangular first air electrode film. The pre-tensioning spring 270 is placed in the spring accommodating groove 262 and the blind hole 211, that is, the pre-tensioning spring 270 is partially embedded in the spring accommodating groove 262, and partially protruding out of the spring accommodating groove 262 is placed in the blind hole 211. The spring accommodating groove 262 and the blind hole 211 provide a better accommodating space for the pretension spring 270, and can limit the pretension spring 270 to a certain extent, so that the installation of the pretension spring 270 is also convenient. Specifically, the pretension spring 270 is a compression spring. One end of the pretension spring 270 abuts against the bottom of the spring accommodating groove 262, and the other end abuts against the bottom of the blind hole 211. The pretension spring 270 is provided with the spring accommodating groove 262 and the blind hole. 211 axis parallel elasticity. When the pressing frame 260 is in contact with the pressing frame 210, the pre-tensioning spring 270 exerts an elastic force on the pressing frame 260 to push it away from the pressing frame 210. The pressing frame 260 is pressed against the first air electrode film by the pressing frame 210 to realize the pressing and fixing of the first air electrode film, and the sealing contact between the first air electrode film and the base case is realized. In addition, the pressing frame and the pressing frame 260 are in surface-to-surface contact with the first air electrode film, and the force distribution is balanced, and the sealing effect will not deteriorate due to partial depression and deformation due to point force.

In some embodiments of the present invention, in order to facilitate the insertion of the positioning post 261 into the blind hole 211 and reduce the insertion resistance, the outer wall of the positioning post 261 and the blind hole 211 are in clearance fit. Specifically, the positioning post 261 and the blind hole 211 are cylindrical.

3, in some embodiments of the present invention, the bottom of the blind hole 211 has a vent hole 212 penetrating the side plate 200, and the vent hole 212 is located on the bottom wall of the blind hole 211 facing outward, so that the blind hole 211 and the side plate 200 The outside air is connected. Since the positioning post 261 and the blind hole 211 match, when the positioning post 261 is pressed into the blind hole 211, the air in it will be compressed, causing the insertion to be blocked. If the air overflow speed is not enough, there will still be a large air resistance. The pressure relief hole 212 can discharge the excess air to the outside to achieve the pressure relief effect, making the positioning post 261 more smoothly inserted and increasing the installation speed And efficiency.

3, in some embodiments of the present invention, the length of the positioning post 261 is less than the depth of the blind hole 211, which can prevent the positioning post 261 from abutting the bottom wall of the blind hole 211, causing structural interference, and avoiding the compression frame 210 and the compression frame The inability of 260 to contact causes the contact surface between the pressing frame 210 and the pressing frame 260 to decrease, so that the pressure of the pressing frame 210 on the pressing frame 260 is not evenly distributed.

In some embodiments of the present invention, staggered ribs 230 are arranged in the frame selection area of the pressing frame 210, and the ribs 230 strengthen the structural strength of the side plate 200 to avoid damage caused by stress. As shown in Figs. 4 and 5, the side plate 200 is arched outward at the position of the pressing frame 210, so that the position is easily damaged by compression, and the reinforcing rib 230 can effectively strengthen the structural strength of the area.

Referring to FIG. 7, in some embodiments of the present invention, both sides of the outer wall of the side plate 200 have hand-pull grooves 280 recessed toward the center, which facilitates the pulling down of the side plate 200 when the side plate 200 is removed. In addition, in some embodiments of the present invention, the outer wall of the side plate 200 has a nameplate installation groove 290 recessed inward, and the nameplate can be installed to display the manufacturing information of the metal-air battery.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples" or "some examples" etc. mean to combine the embodiments The specific features, structures, materials, or characteristics described in the examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above-mentioned terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and purpose of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

A metal-air battery, characterized in that it comprises:

The base shell (100) has a cavity (110), and the upper end of the outer wall has a buckle groove (120), and the front and back sides and the upper end of the cavity (110) are open;

Two first air electrode films (300) are attached to the front and rear sides of the cavity (110) and are in contact with the outside air;

Two side plates (200), respectively connected to the front and rear sides of the base shell (100), are used to compress the first air electrode film (300) to achieve sealing of the front and rear sides of the cavity (110) ；

A metal electrode cover (400) is provided at the upper opening of the cavity (110), and a metal electrode plate (410) inserted into the cavity (110) is provided at the bottom;

The base cover (500), the outer wall is movably provided with a buckle (501) matching the buckle groove (120), and the base cover ( 500) is connected with the base shell (100), and the metal electrode cover (400) is pressed tightly to realize the sealing of the upper end of the cavity (110).
The metal-air battery according to claim 1, characterized in that: the base shell (100) comprises two half shells (101), and the two half shells (101) are symmetrically arranged and connected by fasteners. The two first air electrode films (300) are attached to the opposite sides of the two half shells (101).
The metal-air battery according to claim 2, characterized in that: a second air electrode membrane (600) is installed on the opposite sides of the two half-shells (101), and the half-shells (101) and the corresponding The first air electrode film (300) and the second air electrode film (600) form an electrolyte accommodating cavity (190), and the two half shells (101) are connected to the two second air electrode films (600). A first vent hole (170) is formed between) so that the second air electrode film (600) can be in contact with external air.
The metal-air battery according to claim 1, characterized in that: the upper end of the base shell (100) has a sunken first bonding surface (102), and the metal electrode cover (400) is bonded to the first bonding surface (102). A bonding surface (102), and a first sealing ring (430) is embedded in the first bonding surface (102).
The metal-air battery according to claim 1, wherein the base cover (500) comprises a top cover (510) and a bottom cover (520), and the bottom cover (520) is connected to the top cover (510). ) At the bottom, the bottom of the bottom cover (520) abuts against the metal electrode cover (400) and compresses the metal electrode cover (400).
The metal-air battery according to claim 5, characterized in that: the middle part of the metal electrode cover (400) has a first protrusion (420) protruding upward, and the first protrusion (420) passes through the The bottom cover (520), the center of the first protrusion (420) has a through liquid filling port (421), and the top cover (510) is provided with a downward protrusion corresponding to the first protrusion (420) The sealing protrusion (511) of the sealing protrusion (511) abuts against the first protrusion (420) to seal the filling port (421).
The metal-air battery according to claim 6, characterized in that: the bottom cover (520) is provided with a second protrusion (521) protruding upward corresponding to the sealing protrusion (511), and the second protrusion The center of the (521) has a central hole (523) for the first protrusion (420) to penetrate, and the bottom of the sealing protrusion (511) is at least partially embedded in the central hole (523).
The metal-air battery according to claim 6, characterized in that: a second sealing ring (540) is sandwiched between the sealing protrusion (511) and the first protrusion (420).
The metal-air battery according to claim 1, wherein the outer edge of the opening at the front and rear sides of the cavity (110) has an annular bonding surface for bonding the first air electrode film (300), so The side of the side plate (200) facing the annular bonding surface is provided with an annular pressing surface corresponding to the annular pressing surface, the annular pressing surface is provided with a plurality of blind holes (211), and the side plate (200) A second vent hole (220) is provided, the second vent hole (220) is located in the surrounding range of the annular pressing surface; the annular pressing surface and the annular fitting surface are sandwiched between A compression frame (260) is provided, and the compression frame (260) is used to press the first air electrode film (300) against the ring under the pressure of the ring pressing surface of the side plate (200) On the surface; the blind hole (211) is installed with a pre-tension spring (270), the pre-tension spring (270) is used to apply the compression frame (260) to push it toward the annular fitting surface The elastic pre-tightening force.
The metal-air battery according to claim 9, characterized in that: the compression frame (260) is protruding toward the side plate (200) and is formed with positioning posts (261) corresponding to the blind holes (211). ), the positioning post (261) is inserted into the blind hole (211) and can slide along the blind hole (211).