Air battery and air battery pack

Abstract

The present invention provides an air battery and an air battery pack, relating to the technical field of batteries. The air battery includes a positive electrode housing, a negative electrode housing, and a positive electrode sheet. The positive electrode housing is fixedly connected to the negative electrode housing and cooperates to form the battery housing; at least one negative electrode groove is provided on the protruding long strip, and the negative electrode groove can form a gas-limiting hole with the positive electrode housing. The negative electrode housing of the air battery provided by the present invention has a negative electrode groove. When multiple air batteries form an air battery pack, the negative electrode housing can be inserted into the positive electrode groove of the positive electrode housing, and the negative electrode groove on the protruding long strip of the negative electrode housing forms a gas-limiting hole with the positive electrode housing, so as to reduce the air flow rate while ensuring that the positive electrode sheet has sufficient contact area with the air, effectively slowing down the absorption of carbon dioxide and moisture in the air by the negative electrode reactant zinc paste, and increasing the service life of the air battery.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to an air battery and an air battery pack. Background Art

[0002] Since the positive electrode reactant of a zinc-air battery is oxygen from the air and does not need to be stored in the battery, and the negative electrode reactant is zinc powder, the zinc-air battery has the advantages of high energy density, stable discharge voltage, high safety, low price, and environmental friendliness. As a new type of portable power source, energy storage device, and alarm power source, it has always been the focus of research and attention in the electrochemistry field.

[0003] Since the zinc-air battery needs oxygen in the air to participate in the reaction, it inevitably comes into contact with the air; however, the negative electrode reactant zinc paste is prone to absorb carbon dioxide in the air to react and form potassium carbonate, which reduces the conductivity and then fails. When the environmental humidity is too high, the zinc paste is prone to absorb moisture in the air and fail, and when the environmental humidity is too low, the zinc paste is prone to lose moisture and fail. Summary of the Invention

[0004] The purpose of the present invention is to provide an air battery and an air battery pack to alleviate the technical problem that the air battery is prone to failure due to the influence of carbon dioxide and humidity.

[0005] An air battery provided by the present invention includes a positive electrode housing, a negative electrode housing, and a positive electrode sheet. The positive electrode housing is fixedly connected to the negative electrode housing and cooperates to form the battery housing, and the positive electrode sheet is located inside the battery housing;

[0006] The positive electrode housing has a breathable area, and a plurality of ventilation holes for air to enter the battery housing are provided in the breathable area;

[0007] A positive electrode groove capable of accommodating the negative electrode housing is provided on the side of the positive electrode housing away from the negative electrode housing;

[0008] A raised strip is provided on the side of the negative electrode housing away from the positive electrode housing and along the edge of the negative electrode housing;

[0009] At least one negative electrode groove is provided on the raised strip, and the negative electrode groove can form a restricted air hole with the positive electrode housing.

[0010] Furthermore, a plurality of limiting bosses are provided on the side wall of the positive electrode groove, and the plurality of limiting bosses are used to fix the negative electrode housing;

[0011] And a buffer area is formed between the plurality of limiting bosses, and the buffer area is used to accommodate the deformation of the negative electrode housing.

[0012] Furthermore, the positive electrode housing and the negative electrode housing are connected by a buckle.

[0013] Further, there are 8 - 16 of the negative electrode grooves provided on the raised strip.

[0014] Further, the cross - section of the negative electrode groove along the protruding direction of the raised strip is semi - circular.

[0015] Further, the diameter of the negative electrode groove is 3 - 6 mm.

[0016] Further, the breathable area includes a plurality of inner grooves, and air vent holes for air to enter the inner grooves are provided in the inner grooves;

[0017] And a communication groove is provided between adjacent inner grooves, and the communication groove forms an exchange hole for air flow exchange between adjacent inner grooves with the positive electrode plate.

[0018] Further, there are 100 - 300 inner grooves provided in the breathable area, and the diameter of the air vent holes provided in the inner grooves is 2 - 5 mm.

[0019] The present invention also provides an air battery pack, which includes a plurality of the above - mentioned air batteries.

[0020] Further, one end of the negative electrode housing of the air battery is inserted into the positive electrode groove of the positive electrode housing of an adjacent air battery.

[0021] The negative electrode housing of the air battery provided by the present invention has negative electrode grooves. When a plurality of air batteries form an air battery pack, the negative electrode housing can be inserted into the positive electrode groove of the positive electrode housing, and the negative electrode grooves on the raised strip of the negative electrode housing and the positive electrode housing form air - limiting holes. Thus, while ensuring that the positive electrode plate has sufficient contact area with air, the air flow rate is reduced, effectively slowing down the absorption of carbon dioxide and moisture in the air by the negative reactant zinc paste, and increasing the service life of the air battery.

[0022] The present invention also provides an air battery pack, which uses the above - mentioned air battery, and thus has all the beneficial effects of the air battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of the air battery provided by the embodiment of the present invention;

[0025] Figure 2 is Figure 1 a schematic structural view of the positive electrode housing of the air battery shown;

[0026] Figure 3 is Figure 1 a schematic structural view of another angle of the positive electrode housing of the air battery shown;

[0027] Figure 4 is Figure 3 a partial enlarged view of A of the schematic structural view of the positive electrode housing of the air battery shown;

[0028] Figure 5 is Figure 1 a schematic structural view of the negative electrode housing of the air battery shown;

[0029] Figure 6 is a schematic structural view of the air battery pack provided by an embodiment of the present invention;

[0030] Figure 7 is Figure 6 a schematic structural view of the connection between the negative electrode housing and the positive electrode housing of the air battery pack shown;

[0031] Figure 8 is Figure 7 a partial enlarged view of B of the schematic structural view of the connection between the negative electrode housing and the positive electrode housing of the air battery pack shown.

[0032] Icon: 100 - positive electrode housing; 200 - negative electrode housing; 300 - ventilation hole; 400 - positive electrode groove; 500 - limiting boss; 600 - buffer area; 700 - communication groove; 800 - inner groove; 900 - raised strip; 110 - negative electrode groove; 120 - air limiting hole. Detailed implementation manners

[0033] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment

[0035] Referring to Figures 1 - 5 shown, an air battery provided by the present invention includes a positive electrode housing 100, a negative electrode housing 200, and a positive electrode sheet. The positive electrode housing 100 is fixedly connected to the negative electrode housing 200 and cooperates to form the battery housing, and the positive electrode sheet is located inside the battery housing;

[0036] The positive electrode housing 100 has a breathable area, and a plurality of ventilation holes 300 for air to enter the battery housing are provided in the breathable area;

[0037] On the side of the positive electrode housing 100 away from the negative electrode housing 200, there is a positive electrode groove 400 capable of accommodating the negative electrode housing 200;

[0038] On the side of the negative electrode housing 200 away from the positive electrode housing 100 and along the edge of the negative electrode housing 200, there is a raised strip 900;

[0039] On the raised strip 900, there is at least one negative electrode groove 110, and the negative electrode groove 110 can form a restricted air hole 120 with the positive electrode housing 100.

[0040] In some embodiments, the battery housing formed by the positive electrode housing 100 and the negative electrode housing 200 of the air battery has a positive electrode plate. This air battery is a zinc-air battery. The positive electrode plate contacts the air through the ventilation holes 300, so that the positive electrode plate can react with the oxygen in the air; in order for the positive electrode plate to react with oxygen evenly, a plurality of ventilation holes 300 are provided in the breathable area.

[0041] The raised strip 900 on the negative electrode housing 200 protrudes away from the positive electrode housing 100; when the negative electrode housing 200 is inserted into the positive electrode housing 100, the raised strip 900 covers the breathable area and the negative electrode groove 110 forms a restricted air hole 120 with the positive electrode housing 100.

[0042] The air in contact with the positive electrode plate needs to pass through the restricted air hole 120 first and then through the ventilation port; thus, the number of restricted air holes 120 is limited, the air flow rate is reduced, the entry of carbon dioxide and moisture is reduced, and the reaction between carbon dioxide and moisture and the negative electrode reactant zinc paste is effectively delayed.

[0043] Only the positive electrode plate of the zinc-air battery is in contact with the air. The negative electrode zinc paste will absorb carbon dioxide in the air and absorb or volatilize moisture through the positive electrode plate; although the zinc-air battery has been treated to avoid contact between air and zinc paste, the sealing is difficult and the sealing effect is poor. Moreover, after the positive electrode plate contacts the air, the chemical reaction continues. Therefore, the zinc-air battery pack needs to strictly control the contact area between the positive electrode plate and the air and the air flow rate to avoid rapid failure and inability to discharge electricity.

[0044] The positive electrode housing 100 and the negative electrode housing 200 can be made of one of plastics such as nylon, polypropylene, or acrylonitrile-butadiene-styrene.

[0045] Refer to Figure 2, optionally, a plurality of limiting bosses 500 are provided on the side wall of the positive electrode groove 400, and the plurality of limiting bosses 500 are used to fix the negative electrode housing 200;

[0046] And a buffer area 600 is formed between the plurality of limiting bosses 500, and the buffer area 600 is used to accommodate the deformation of the negative electrode housing 200.

[0047] A plurality of limiting bosses 500 are provided on the side wall of the positive electrode groove 400, and the plurality of limiting bosses 500 can firmly fix the negative electrode housing 200 in the positive electrode groove 400.

[0048] Since a buffer area 600 is formed between the limiting bosses 500 to accommodate the deformation of the negative electrode housing 200, the volume of the negative zinc paste expands during the reaction, resulting in the deformation of the negative electrode housing 200; a buffer area 600 is formed between the limiting bosses 500 to accommodate the deformation of the negative electrode housing 200.

[0049] Optionally, the positive electrode housing 100 and the negative electrode housing 200 are connected by a buckle. Generally, a clamping member is provided on the positive electrode housing 100, and a fastening member is provided on the negative electrode housing 200; generally, 2-8 clamping members are provided on the positive electrode housing 100, and corresponding fastening members are provided at corresponding positions on the negative electrode housing 200.

[0050] According to actual needs, optionally, 8-16 negative electrode grooves 110 are provided on the raised strip 900.

[0051] Refer to Figure 5 , further, the cross-section of the negative electrode groove 110 along the protruding direction of the raised strip 900 is semi-circular.

[0052] Further, the diameter of the negative electrode groove 110 is 3-6 mm.

[0053] The negative electrode groove 110 and the positive electrode housing 100 form a limited air hole 120, and the number of the limited air holes 120 corresponds to the number of the negative electrode grooves 110; in order to enable air to enter more evenly from the limited air holes 120, generally, the negative electrode grooves 110 are arranged more evenly on the raised strip 900, and the negative electrode grooves 110 with corresponding numbers and sizes are selected according to the specifications of the air battery so as to limit the air flow rate.

[0054] The raised strip 900 generally has a width of 2-5 mm and a thickness of 2-5 mm.

[0055] And by adjusting the number and size of the negative electrode grooves 110, the size of the air flow is further adjusted, and the requirements of different discharge currents are met under the condition of reducing air interference.

[0056] The negative electrode grooves 110 are evenly distributed on the raised strip 900, ensuring that even if the battery case deforms during the later stage of discharge due to the expansion of the zinc paste, sufficient oxygen can still be provided for the positive electrode reaction. Moreover, this air intake design ensures the consistency and stability of the air flow, greatly avoiding the problem that the entire battery pack fails quickly due to the failure of some batteries in series and parallel connections caused by the interference of air flow on these batteries.

[0057] The breathable area includes a plurality of inner grooves 800, and ventilation holes 300 for air to enter the inner grooves 800 are arranged in the inner grooves 800;

[0058] Moreover, a communication groove 700 is arranged between adjacent inner grooves 800, and an exchange hole for air flow exchange between adjacent inner grooves 800 is formed between the communication groove 700 and the positive electrode plate.

[0059] In order to enable the oxygen in the air to fully contact the positive electrode plate, a plurality of inner grooves 800 are arranged in the positive electrode case 100, and each inner groove 800 is provided with the ventilation hole 300;

[0060] The inner groove 800 has a widened opening. Air enters the inner groove 800 from the ventilation hole 300. The inner groove 800 increases the contact area between the air and the positive electrode plate, ensuring the normal progress of the positive electrode reaction.

[0061] Moreover, in order to make the air flow more smoothly in the positive electrode case 100, a communication groove 700 is arranged between the inner grooves 800; this makes the air flow more smoothly between the positive electrode plate and the breathable area, increases the gas flow between the inner grooves 800, makes the oxygen content in the air more uniform, and ensures the uniform consumption of the positive electrode plate.

[0062] Optionally, the breathable area is provided with 100 - 300 inner grooves 800, and the diameter of the ventilation holes 300 arranged in the inner grooves 800 is 2 - 5 mm.

[0063] The breathable area has 100 - 300 inner grooves 800, and the diameter of the ventilation holes 300 is 2 - 5 mm; the inner grooves 800 can increase the contact area between the air and the positive electrode plate, enabling the positive electrode plate to be consumed evenly; and arranging the ventilation holes 300 in the inner grooves 800 helps to restrict the air flow and reduces the internal and external flow of air in the positive electrode case 100.

[0064] The negative electrode housing 200 of the air battery provided by the present invention has a negative electrode groove 110. When a plurality of air batteries form an air battery pack, the negative electrode housing 200 can be inserted into the positive electrode groove 400 of the positive electrode housing 100, and the negative electrode groove 110 on the protruding strip 900 of the negative electrode housing 200 and the positive electrode housing 100 form a restricted air hole 120. Thus, while ensuring that the positive electrode sheet has sufficient contact area with air, the air flow rate is reduced, effectively slowing down the absorption of carbon dioxide and moisture in the air by the negative electrode reactant zinc paste, and increasing the service life of the air battery.

[0065] As Figures 6 - 8 shown, the present invention also provides an air battery pack, which includes a plurality of the above-mentioned air batteries.

[0066] Further, one end of the negative electrode housing 200 of the air battery is inserted into the positive electrode groove 400 of the positive electrode housing 100 of an adjacent air battery.

[0067] The air battery pack is assembled from a plurality of air batteries. During assembly, the plurality of air batteries are arranged in sequence, and the negative electrode housing 200 of the air battery is inserted into the positive electrode groove 400 of the positive electrode housing 100 of an adjacent air battery, so that the negative electrode groove 110 on the negative electrode housing 200 contacts the positive electrode housing 100 to form a restricted air hole 120.

[0068] The inner groove 800 enables better and more sufficient contact between air and the positive electrode sheet, so that the positive electrode sheet is consumed evenly. The vent holes 300 provided in the inner groove 800 reduce the air flow rate, and the restricted air hole 120 further reduces the air flow rate. Furthermore, through the air flow restriction on both sides, it not only ensures that air can be evenly distributed on the positive electrode, but also avoids the failure of the battery positive electrode surface due to excessive air contact, greatly extending the service life. The assembly process is simple with good consistency and stable structure.

[0069] Compared with the existing square zinc-air battery packs on the market, this air battery pack has a longer service life, simpler assembly, more stable and reliable structure, better consistency, and is suitable for large-scale industrial production.

[0070] The present invention also provides an air battery pack, which adopts the above-mentioned air battery, and thus has all the beneficial effects of the air battery.

[0071] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air battery, characterized in that, it includes a positive electrode housing (100), a negative electrode housing (200) and a positive electrode sheet. The positive electrode housing (100) is fixedly connected to the negative electrode housing (200) and cooperates to form a battery housing, and the positive electrode sheet is located inside the battery housing; the positive electrode housing (100) has a breathable area, and a plurality of ventilation holes (300) for air to enter the battery housing are provided in the breathable area; a positive electrode groove (400) capable of accommodating the negative electrode housing (200) is provided on the side of the positive electrode housing (100) away from the negative electrode housing (200); a raised strip (900) is provided on the side of the negative electrode housing (200) away from the positive electrode housing (100) and along the edge of the negative electrode housing (200); at least one negative electrode groove (110) is provided on the raised strip (900), and the negative electrode groove (110) can form a limited air hole (120) with the positive electrode housing (100); a plurality of limiting bosses (500) are provided on the side wall of the positive electrode groove (400), and the plurality of limiting bosses (500) are used to fix the negative electrode housing (200); and a buffer area (600) is formed between the plurality of limiting bosses (500), and the buffer area (600) is used to accommodate the deformation of the negative electrode housing (200); 8-16 of the negative electrode grooves (110) are provided on the raised strip (900); the diameter of the negative electrode groove (110) is 3-6 mm.

2. The air battery according to claim 1, characterized in that, the positive electrode housing (100) and the negative electrode housing (200) are connected by a buckle.

3. The air battery according to claim 1, characterized in that, the cross-section of the negative electrode groove (110) along the protruding direction of the raised strip (900) is semi-circular.

4. The air battery according to claim 1, characterized in that, the breathable area includes a plurality of inner grooves (800), and the ventilation holes (300) for air to enter the inner grooves (800) are provided in the inner grooves (800); and a communication groove (700) is provided between adjacent inner grooves (800), and the communication groove (700) forms an exchange hole for air flow exchange between adjacent inner grooves (800) with the positive electrode sheet.

5. The air battery according to claim 4, characterized in that, 100-300 inner grooves (800) are provided in the breathable area, and the diameter of the ventilation holes (300) provided in the inner grooves (800) is 2-5 mm.

6. An air battery pack, characterized in that, it includes a plurality of air batteries according to any one of claims 1-5.

7. The air battery pack according to claim 6, characterized in that, one end of the negative electrode housing (200) of the air battery is inserted into the positive electrode groove (400) of the positive electrode housing (100) of an adjacent air battery.

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