Zinc-nickel battery positive electrode material and preparation method and system thereof

Abstract

The invention relates to the technical field of energy storage, and discloses a zinc-nickel battery positive electrode material and a preparation method and system thereof. Comprising a console, a grinding part, a plurality of grinding seats, a telescopic limiting and supporting mechanism, a first screw rod, a telescopic gas storage mechanism fixedly connected to the lower end of the first screw rod, a sealing flange cover movably connected to the lower end of the telescopic gas storage mechanism, a movable nut mechanism arranged on the sealing flange cover and a screw rod screwing mechanism, the screw rod is arranged in the screw rod screwing mechanism; the grinding tank is arranged in the grinding seat; on the basis of an original screw rod limiting and pressing structure, the cover body of the grinding tank is combined to the screw rod limiting and pressing structure, and the limiting and fixing process of the bolt is integrated into the downward pressing and limiting process, so that automatic connection between the tank body and the cover body of the grinding tank can be realized, and the time consumption for connecting the tank body and the cover body of the grinding tank is greatly shortened; and the device is suitable for grinding tanks with different heights, and the pressure applying force can be conveniently adjusted.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and more specifically, to a zinc-nickel battery positive electrode material and a preparation method and system thereof. Background Art

[0002] Zinc-nickel secondary batteries have the characteristics of high operating voltage, high power density, high energy density, no memory effect, high safety index and low production cost. They are environmentally friendly and high-performance secondary batteries.

[0003] At present, when preparing zinc-nickel secondary batteries, multiple materials need to be mixed and processed. In this process, a planetary ball mill is needed to grind the corresponding materials into powders of a set particle size. The grinding jar and the cover of the grinding jar in the common planetary ball mill are mostly connected by threads. However, this connection method will cause the powder to remain in the thread gap when pouring out, requiring secondary cleaning, which is more cumbersome. The flange connection method requires manual connection of multiple bolts, which is time-consuming and labor-intensive, resulting in low efficiency in the production or research experiments of battery positive electrode materials. Summary of the invention

[0004] The purpose of the present invention is to provide a zinc-nickel battery positive electrode material and a preparation method and system thereof in order to solve the above problems.

[0005] The present invention provides a zinc-nickel battery positive electrode material, wherein the zinc-nickel battery positive electrode material is a composite material of NiO, Ni(OH)2, cobalt oxide, manganese oxide, polyvinyl pyrrolidone, and a fluoride additive;

[0006] The cobalt oxide is CoO or Co3O4;

[0007] The manganese oxide is MnO or MnO2;

[0008] The fluoride additive is LiF or NaF.

[0009] The present invention provides a method for preparing a positive electrode material for a zinc-nickel battery, which is used to prepare a positive electrode material for a zinc-nickel battery as described above, comprising the following steps:

[0010] Step S1, preparing NiO, Ni(OH)2, cobalt oxide, manganese oxide, polyvinyl pyrrolidone, and fluoride additive according to a set ratio, the set ratio is:

[0011] NiO: 40%-60%;

[0012] Ni(OH)2: 20%-30%

[0013] Cobalt oxide: 10%-20%;

[0014] Manganese oxide: 5%-10%;

[0015] Polyvinylpyrrolidone: 1%-5%;

[0016] Fluoride additive: 1%;

[0017] Step S2, drying NiO, Ni(OH)2, cobalt oxide and manganese oxide at a drying temperature ranging from 100 to 120°C for 4 hours;

[0018] Step S3, using a planetary ball mill, mixing and grinding the NiO, Ni(OH)2, cobalt oxide, manganese oxide and fluoride additive that have been dried in step S2, the mixing and grinding time is 6 hours, and the speed is set at 400r / min;

[0019] Step S4, using a mold to apply a pressure of 10-15 MPa to press the mixture generated in step S3;

[0020] Step S5, calcining the mixture after pressing in step S4, the calcination temperature is set to 300-500° C., the duration is 2-4 hours, and the inert gas flow rate is controlled at 200 mL / min;

[0021] Step S6, naturally cooling the calcined product to room temperature;

[0022] Step S7, using a high-energy ball mill to grind the cooled calcined product into particles of 50-100 μm, the grinding time is 1 h;

[0023] Step S8: Add polyvinyl pyrrolidone to the crushed material, and add 10 ml of water or ethanol, and mix them thoroughly to obtain the positive electrode material of the zinc-nickel battery.

[0024] The invention provides a zinc-nickel battery positive electrode material preparation system, comprising a control console, a grinding part connected to the control console, a flip door hinged on the grinding part, a plurality of grinding seats arranged in the grinding part, a storage groove arranged in the grinding seat, a plurality of limit through grooves symmetrically arranged on the inner wall of the storage groove, a telescopic limit support mechanism detachably connected to the grinding seat, a first screw threadedly connected to the center position of the telescopic limit support mechanism, a telescopic gas storage mechanism fixedly connected to the lower end of the first screw, a sealing flange cover movably connected to the lower end of the telescopic gas storage mechanism, a plurality of movable nut mechanisms and screw rotating mechanisms uniformly distributed on the sealing flange cover, a second screw arranged in the screw rotating mechanism, and a grinding jar arranged in the grinding seat, the plurality of movable nut mechanisms and the plurality of screw rotating mechanisms are arranged correspondingly, the sealing flange cover is movably connected to the grinding jar through the plurality of movable nut mechanisms and the screw rotating mechanism, the bottom of the grinding jar contacts the bottom wall of the storage groove, and the plurality of movable nut mechanisms are all connected to the inner space of the telescopic gas storage mechanism;

[0025] The grinding tank is provided with a plurality of connection holes matched with the movable nut mechanism and the screw rotating mechanism;

[0026] When the telescopic gas storage mechanism is in an initial length state, the plurality of movable nut mechanisms are all outside the coverage of the grinding tank;

[0027] When the telescopic gas storage mechanism is at a first set length, the plurality of movable nut mechanisms are respectively moved to positions coaxial with the plurality of connecting holes, and the plurality of movable nut mechanisms are respectively connected to the corresponding screw rotating mechanisms;

[0028] When the movable nut mechanism is connected to the screw rotating mechanism, the telescopic air storage mechanism is used to drive the screw rotating mechanism to screw the second screw into the corresponding connecting hole and the movable nut mechanism in sequence.

[0029] As a further optimization scheme of the present invention, the telescopic limit support mechanism includes a middle limit plate, a first telescopic rod and a spring symmetrically connected at both ends of the middle limit plate, a limit plug connected to the other end of the first telescopic rod, and an elastic wedge block arranged at the upper end of the limit plug, the thickness of the limit block is the same as the height of the limit groove, the spring is sleeved on the outside of the first telescopic rod, and the two ends of the spring are respectively fixedly connected to the middle limit plate and the limit plug.

[0030] As a further optimization solution of the present invention, a screw hole matching the first screw rod is provided at the middle position of the middle limit plate, and a rotating handle is connected to the upper end of the first screw rod.

[0031] As a further optimization scheme of the present invention, the telescopic air storage mechanism includes an upper connecting plate fixedly connected to the lower end of the first screw, a second telescopic rod and a telescopic bellows fixedly connected to the lower end of the upper connecting plate, and a lower connecting ring fixedly connected to the lower end of the telescopic bellows. The sealing flange cover is provided with an annular rotating groove matching the lower connecting ring, and a sealed air storage chamber is formed between the upper connecting plate, the telescopic bellows, the lower connecting ring and the sealing flange cover, and the annular ventilation groove is connected to the sealed air storage chamber.

[0032] As a further optimization solution of the present invention, an annular ventilation groove is provided on the sealing flange cover, and a plurality of movable nut mechanisms are connected to the sealed air storage chamber through the annular ventilation groove.

[0033] As a further optimization scheme of the present invention, the movable nut mechanism includes a convex-shaped limiting groove opened on the lower end surface of the sealing flange cover, an adapting slider slidably connected to the inner wall of the convex-shaped limiting groove, a telescopic airbag connected between the adapting slider and the inner wall of the convex-shaped limiting groove, a first ventilation cavity and a third ventilation cavity arranged inside the sealing flange cover, a second ventilation cavity arranged inside the adapting slider, and a nut fixedly connected to the lower end of the adapting slider. The convex-shaped limiting groove is distributed along the diameter direction of the sealing flange cover, the two ends of the first ventilation cavity are respectively connected to the annular ventilation groove and the telescopic airbag, and one end of the second ventilation cavity is connected to the telescopic airbag. When the telescopic airbag is in the upper limit state of length, the other end of the second ventilation cavity is connected to the third ventilation cavity, and the outer wall of the adapting slider is in close contact with the inner wall of the convex-shaped limiting groove.

[0034] As a further optimization scheme of the present invention, the screw rotating mechanism includes a limiting perforation arranged on the sealing flange cover, an annular cavity arranged on the inner wall of the limiting perforation, an inner hexagonal rotating cylinder slidably connected to the inner wall of the limiting perforation, a plurality of blades fixedly connected to the outer wall of the inner hexagonal rotating cylinder, a fourth ventilation cavity and a gas buffer chamber arranged on the inner wall of the sealing flange cover, several of the blades are in the annular cavity, and there is a gap between the other end of several blades and the inner wall of the annular cavity, the gas buffer chamber is connected with the annular cavity through the fourth ventilation cavity, an inclined air channel is provided between the annular cavity and the third ventilation cavity, and the second screw is arranged in the inner hexagonal rotating cylinder.

[0035] As a further optimization solution of the present invention, an internal thread matching the second screw is provided on the inner wall of the limiting perforation near the lower end opening.

[0036] The beneficial effects of the present invention are as follows: the present invention is based on the original screw limiting and pressing structure, combines the cover body of the grinding jar to the screw limiting and pressing structure, and integrates the limiting and fixing process of the bolt into the downward limiting process, which can realize the automatic connection between the tank body and the cover body of the grinding jar, greatly shortens the time for connecting the tank body and the cover body of the grinding jar, is suitable for grinding jars of different heights, and the pressure applied can be conveniently adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of the zinc-nickel battery positive electrode material preparation system of the present invention;

[0038] Figure 2 This is a matching view of the grinding seat and the grinding jar of the present invention;

[0039] Figure 3 It is a matching view of the movable nut mechanism and the screw rotating mechanism of the present invention;

[0040] Figure 4 The present invention Figure 3 Magnified view at A in the middle;

[0041] Figure 5 The present invention Figure 3 Magnified view at B in the middle;

[0042] Figure 6 The present invention Figure 2 A partial cross-sectional view of

[0043] Figure 7 The present invention Figure 6 Magnified view at center C.

[0044] In the figure: 1, control console; 2, grinding part; 201, flip door; 3, grinding seat; 301, storage slot; 302, limit slot; 4, telescopic limit support mechanism; 401, middle limit plate; 402, first telescopic rod; 403, spring; 404, limit plug; 405, elastic wedge; 5, first screw; 6, telescopic gas storage mechanism; 601, upper connecting plate; 602, second telescopic rod; 603, telescopic bellows; 604, lower connecting ring; 7, sealing flange cover; 701 , annular ventilation groove; 8, movable nut mechanism; 801, convex limit slide groove; 802, adapter slider; 803, telescopic air bag; 804, first ventilation cavity; 805, second ventilation cavity; 806, third ventilation cavity; 807, nut; 9, screw rotation mechanism; 901, limit perforation; 902, annular cavity; 903, hexagonal rotating cylinder; 904, blade; 905, second screw; 906, fourth ventilation cavity; 907, gas buffer chamber; 10, grinding jar. DETAILED DESCRIPTION

[0045] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only intended to enable those skilled in the art to better understand and implement the subject matter described herein. In addition, the features described relative to some examples may also be combined in other examples.

[0046] Example 1

[0047] A zinc-nickel battery positive electrode material, the zinc-nickel battery positive electrode material is a composite material of NiO, Ni(OH)2, cobalt oxide, manganese oxide, polyvinyl pyrrolidone, and fluoride additives;

[0048] Polyvinyl pyrrolidone, used to improve the adhesion of materials

[0049] Cobalt oxide is CoO or Co3O4; it can improve the cycle life and energy density of the battery;

[0050] Manganese oxide is MnO or MnO2; provides structural stability and improves specific capacity;

[0051] The fluoride additive is LiF or NaF; it can improve the interface stability and prevent the electrolyte from reacting with the material.

[0052] The nickel-zinc battery prepared using the above-mentioned nickel-zinc battery positive electrode material has achieved significant improvements in energy density, charge and discharge cycle performance, etc.

[0053] Electrode material performance test data:

[0054] The following are the test data for the above-mentioned nickel-zinc battery positive electrode materials and several existing electrode materials. Each set of data includes the test results of specific surface area, conductivity, specific capacity and cycle performance.

[0055]

[0056] From the above data, it can be seen that the above-mentioned nickel-zinc battery positive electrode material is superior to the traditional control material in terms of specific surface area, conductivity, specific capacity and cycle performance, which shows that it has potential advantages in battery applications.

[0057] Example 2

[0058] A method for preparing a positive electrode material for a zinc-nickel battery, characterized in that it is used to prepare a positive electrode material for a zinc-nickel battery as described above, comprising the following steps:

[0059] Step S1, preparing NiO, Ni(OH)2, cobalt oxide, manganese oxide, polyvinyl pyrrolidone, and fluoride additive according to a set ratio, the set ratio is:

[0060] NiO: 40%-60%;

[0061] Ni(OH)2: 20%-30%

[0062] Cobalt oxide: 10%-20%;

[0063] Manganese oxide: 5%-10%;

[0064] Polyvinylpyrrolidone: 1%-5%;

[0065] Fluoride additive: 1%;

[0066] Step S2, drying NiO, Ni(OH)2, cobalt oxide and manganese oxide at a drying temperature ranging from 100 to 120°C for 4 hours;

[0067] Step S3, using a planetary ball mill, mixing and grinding the NiO, Ni(OH)2, cobalt oxide, manganese oxide and fluoride additive that have been dried in step S2, the mixing and grinding time is 6 hours, and the speed is set at 400r / min;

[0068] Step S4, using a mold to apply a pressure of 10-15 MPa to press the mixture generated in step S3;

[0069] Step S5, calcining the mixture after pressing in step S4, the calcination temperature is set to 300-500° C., the duration is 2-4 hours, and the inert gas flow rate is controlled at 200 mL / min;

[0070] Step S6, naturally cooling the calcined product to room temperature;

[0071] Step S7, using a high-energy ball mill to grind the cooled calcined product into particles of 50-100 μm, the grinding time is 1 h;

[0072] Step S8: Add polyvinyl pyrrolidone to the crushed material, and add 10 ml of water or ethanol, and mix them thoroughly to obtain the positive electrode material of the zinc-nickel battery.

[0073] After obtaining the positive electrode material of the zinc-nickel battery, the mixture is coated on an aluminum foil substrate with a coating thickness of 50 microns, dried at 60-80°C for 2 hours to remove the solvent, and then cut into suitable electrode sheets with a size of about 5cm×5cm.

[0074] Example 3

[0075] like Figure 1 , Figure 2 , Figure 3 , Figure 6As shown, a zinc-nickel battery positive electrode material preparation system is used to perform step S3 in the above-mentioned embodiment 2, including a control console 1, a grinding part 2 connected to the control console 1, a flip door 201 hinged on the grinding part 2, a plurality of grinding seats 3 arranged in the grinding part 2, a storage groove 301 arranged in the grinding seat 3, a plurality of limit through grooves 302 symmetrically arranged on the inner wall of the storage groove 301, a telescopic limit support mechanism 4 detachably connected to the grinding seat 3, a first screw rod 5 threadedly connected to the center position of the telescopic limit support mechanism 4, a telescopic gas storage mechanism 6 fixedly connected to the lower end of the first screw rod 5, a sealing flange cover 7 movably connected to the lower end of the telescopic gas storage mechanism 6, and a plurality of The movable nut mechanism 8 and the screw rotating mechanism 9 evenly distributed on the sealing flange cover 7, the second screw 905 arranged in the screw rotating mechanism 9 and the grinding jar 10 arranged in the grinding seat 3, a plurality of movable nut mechanisms 8 and a plurality of screw rotating mechanisms 9 are arranged correspondingly, the sealing flange cover 7 is movably connected with the grinding jar 10 through the plurality of movable nut mechanisms 8 and the screw rotating mechanism 9, the bottom of the grinding jar 10 contacts the bottom wall of the storage groove 301, and the plurality of movable nut mechanisms 8 are all connected with the internal space of the telescopic gas storage mechanism 6; wherein, the control console 1 and the grinding part 2 are both prior art, and the internal planetary gear drive assembly and the corresponding control system thereof are not described in detail here;

[0076] The grinding tank 10 is provided with a plurality of connection holes matched with the movable nut mechanism 8 and the screw rotating mechanism 9;

[0077] When the telescopic gas storage mechanism 6 is in the initial length state, the plurality of movable nut mechanisms 8 are all outside the coverage of the grinding jar 10;

[0078] When the telescopic gas storage mechanism 6 is in the first set length state, the plurality of movable nut mechanisms 8 are respectively moved to positions coaxial with the plurality of connecting holes, and the plurality of movable nut mechanisms 8 are respectively connected to the corresponding screw rotating mechanisms 9;

[0079] When the movable nut mechanism 8 is connected to the screw rotating mechanism 9, the telescopic air storage mechanism 6 is used to drive the screw rotating mechanism 9 to screw the second screw 905 into the corresponding connecting hole and the movable nut mechanism 8 in sequence.

[0080] It should be noted that after the material to be ground and the corresponding grinding beads are placed in the grinding jar 10, they are placed in the grinding seat 3, and then the telescopic limit support mechanism 4 is compressed to shorten it to be able to be placed in the grinding seat 3, and the first screw rod 5 is held and pressed down, so that the compressed telescopic limit support mechanism 4 can move down along the grinding seat 3 until it moves to the limit groove 302, and then it is reset and inserted into the limit groove 302 to achieve limit support, and then the first screw rod 5 is rotated, and the first screw rod 5 continues to move downward and drives the telescopic gas storage mechanism 6 and the sealing flange cover 7. The first screw rod 5 is moved downward until the sealing flange cover 7 contacts the grinding jar 10. If the screw rotation mechanism 9 on the sealing flange cover 7 is aligned with the connecting through-hole on the grinding jar 10, the grinding jar 10 can be rotated or the sealing flange cover 7 can be rotated to align them. At this time, the first screw rod 5 continues to rotate. Since the downward movement of the sealing flange cover 7 is blocked, the first screw rod 5 starts to squeeze the telescopic gas storage mechanism 6 when it moves downward, shortening it, reducing its internal volume, generating positive pressure, and introducing the gas stored therein into a plurality of movable nut mechanisms 8. Driven by the air pressure, the movable nut mechanisms 8 move along the sealing flange The diameter direction of the cover 7 moves toward the center position of the sealing flange cover 7 until it moves to the terminal and stops when it is restricted. At this time, the movable nut mechanism 8 moves to a position coaxially aligned with the connecting hole and is connected with the screw rotating mechanism 9. At this time, the first screw 5 continues to rotate, and the gas begins to enter the screw rotating mechanism 9. The screw rotating mechanism 9 starts to rotate under the drive of the airflow. The screw rotating mechanism 9 can drive the second screw 905 to rotate and move downward when rotating, until the second screw 905 is screwed into the connecting hole and the movable nut mechanism 8 in turn, until the screw can no longer move downward. At this time, the grinding The grinding jar 10 is stably connected to the sealing flange cover 7 to achieve sealing. At this time, the first screw 5 continues to rotate, and the gas can continuously enter the screw rotary conveying mechanism 9, but it will not drive it to rotate. At this time, the screw rotary conveying mechanism 9 only buffers the gas. As the telescopic gas storage mechanism 6 is compressed, its internal air pressure gradually increases, and a set value of pressure is generated to press on the sealing flange cover 7, and further transmitted to the grinding jar 10, so that the grinding jar 10 can be stably limited and fixed during grinding. The whole process is relatively convenient, and the sealing and limiting fixation of the grinding jar 10 can be achieved by only rotating the first screw 5.

[0081] Among them, Figure 2 , Figure 3 , Figure 4 and Figure 6As shown, the telescopic limit support mechanism 4 includes a middle limit plate 401, a first telescopic rod 402 and a spring 403 symmetrically connected at both ends of the middle limit plate 401, a limit plug 404 connected to the other end of the first telescopic rod 402, and an elastic wedge block 405 arranged at the upper end of the limit plug 404, the thickness of the limit plug 404 is the same as the height of the limit groove 302, the spring 403 is sleeved on the outside of the first telescopic rod 402, and the two ends of the spring 403 are respectively fixedly connected to the middle limit plate 401 and the limit plug 404.

[0082] A screw hole matching the first screw rod 5 is provided at the middle position of the middle limiting plate 401 , and a rotating handle is connected to the upper end of the first screw rod 5 .

[0083] It should be noted that, as mentioned above, when the telescopic limit support mechanism 4 is compressed and placed in the grinding seat 3, pressure is first applied from the limit plugs 404 at both ends toward the direction of the middle limit plate 401, so that the two limit plugs 404 move toward the direction of the middle limit plate 401 and squeeze the first telescopic rod 402 and the spring 403 until the distance between the two limit plugs 404 is smaller than the diameter of the grinding seat 3. Then, the entire telescopic limit support mechanism 4 can be placed in the grinding seat 3. After unloading, the limit plugs 404 are pressed against the side wall of the grinding seat 3. At this time, pressing down the first screw rod 5 can drive the middle limit The plate 401, the first telescopic rod 402 and the two limit plugs 404 move in the same direction and at the same distance until the limit plug 404 moves to the limit groove 302, and the limit plug 404 is no longer restricted. Under the resetting action of the spring 403, the limit plug 404 is inserted into the limit groove 302. At this time, the elastic wedge block 405 does not block the process of the limit plug 404 inserting into the limit groove 302. After the spring 403 is completely reset, the elastic wedge block 405 bounces up again and realizes the limitation. At this time, the entire telescopic limit support mechanism 4 cannot be shortened or displaced, and can only rotate around the first screw rod 5, and the rotation angle is the arc angle of the limit groove 302.

[0084] Among them, Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the telescopic air storage mechanism 6 includes an upper connecting plate 601 fixedly connected to the lower end of the first screw rod 5, a second telescopic rod 602 and a telescopic bellows 603 fixedly connected to the lower end of the upper connecting plate 601, and a lower connecting ring 604 fixedly connected to the lower end of the telescopic bellows 603. An annular rotating groove matching the lower connecting ring 604 is provided on the sealing flange cover 7. A sealed air storage chamber is formed among the upper connecting plate 601, the telescopic bellows 603, the lower connecting ring 604 and the sealing flange cover 7, and the annular ventilation groove 701 is communicated with the sealed air storage chamber.

[0085] An annular vent groove 701 is provided on the sealing flange cover 7 , and a plurality of movable nut mechanisms 8 are connected to the sealed air storage chamber via the annular vent groove 701 .

[0086] It should be noted that, as mentioned above, when the sealing flange cover 7 contacts the grinding jar 10, the sealing flange cover 7 and the lower connecting ring 604 are both in a state of restricted movement, and the first screw 5 continues to move downward to squeeze the upper connecting plate 601 to continue to move downward. After the distance between the upper connecting plate 601 and the lower connecting ring 604 is shortened, the volume of the sealed air storage chamber gradually decreases, and a positive pressure is generated inside it. The gas is pressed into a number of movable nut mechanisms 8 from the annular ventilation groove 701, so that the movable nut mechanism 8 can move to the bottom of the connecting hole.

[0087] Among them, Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the movable nut mechanism 8 includes a convex-shaped limiting groove 801 provided on the lower end surface of the sealing flange cover 7, an adapting slider 802 slidably connected to the inner wall of the convex-shaped limiting groove 801, a telescopic airbag 803 connected between the adapting slider 802 and the inner wall of the convex-shaped limiting groove 801, a first ventilation cavity 804 and a third ventilation cavity 806 provided inside the sealing flange cover 7, a second ventilation cavity 805 provided inside the adapting slider 802, and a telescopic airbag 803 fixedly connected to the lower end surface of the adapting slider 802. The nut 807 at the end, the convex limiting groove 801 is distributed along the diameter direction of the sealing flange cover 7, the two ends of the first ventilation cavity 804 are respectively connected with the annular ventilation groove 701 and the telescopic airbag 803, one end of the second ventilation cavity 805 is connected with the telescopic airbag 803, when the telescopic airbag 803 is at the upper limit state of the length, the other end of the second ventilation cavity 805 is connected with the third ventilation cavity 806, and the outer wall of the adapter slider 802 is in close contact with the inner wall of the convex limiting groove 801.

[0088] It should be noted that, as mentioned above, when the sealing flange cover 7 is in contact with the grinding jar 10, the upper end surface of the nut 807 is flush with the lower end surface of the edge of the grinding jar 10. As the gas in the sealed air storage chamber is introduced, the gas flows through the first ventilation cavity 804 and then enters the telescopic airbag 803. At this time, the second ventilation cavity 805 in the adapter slider 802 is blocked by the convex limiting groove 801, and the gas can be retained in the telescopic airbag 803. As the gas increases, the telescopic airbag 803 gradually extends and pushes the adapter slider 802 and the nut 807 to move toward the corresponding screw rotation mechanism 9 until the adapter slider 802 moves to the end point of the stroke of the convex limiting groove 801 and stops moving. At this time, the second ventilation cavity 805 is connected with the third ventilation cavity 806, and is connected with the screw rotation mechanism 9 through the third ventilation cavity 806. The gas entering subsequently can continuously enter the screw rotation mechanism 9.

[0089] Among them, Figure 3 , Figure 4 and Figure 5 As shown, the screw rotating mechanism 9 includes a limiting perforation 901 provided on the sealing flange cover 7, an annular cavity 902 provided on the inner wall of the limiting perforation 901, an inner hexagonal rotating cylinder 903 slidably connected to the inner wall of the limiting perforation 901, a plurality of blades 904 fixedly connected to the outer wall of the inner hexagonal rotating cylinder 903, a fourth ventilation cavity 906 and a gas buffer chamber 907 provided on the inner wall of the sealing flange cover 7, the plurality of blades 904 are all in the annular cavity 902, and there is a gap between the other end of the plurality of blades 904 and the inner wall of the annular cavity 902, the gas buffer chamber 907 is connected to the annular cavity 902 through the fourth ventilation cavity 906, an inclined air channel is provided between the annular cavity 902 and the third ventilation cavity 806, and the second screw 905 is provided in the inner hexagonal rotating cylinder 903.

[0090] An inner thread matching the second screw rod 905 is provided on the inner wall of the limiting through hole 901 near the lower end opening.

[0091] It should be noted that, as mentioned above, as the gas continues to enter from the third ventilation cavity 806, it can be introduced into the annular cavity 902 from the inclined airway, and the blades 904 begin to rotate under the impact of the airflow, and drive the hexagonal rotating cylinder 903 to rotate. After the airflow passes through the annular cavity 902, it enters the fourth ventilation cavity 906 and the gas buffer chamber 907. When the hexagonal rotating cylinder 903 rotates, it can drive the second screw 905 set inside it to rotate in the same direction and at the same angle. Due to the limiting effect of the hexagonal structure, the second screw 905 can only rotate with the hexagonal rotating cylinder 903 and move up and down along the central axis of the hexagonal rotating cylinder 903. When the second screw 905 rotates, the internal thread that cooperates with the limiting through-hole 901 can make the second screw 905 start to move toward the connecting hole and the nut 807, and continue to rotate during the movement until the second screw 905 is screwed into the nut 807 and After locking, the sealing flange cover 7 is now stably connected to the grinding jar 10, and when the pressure on the sealing flange cover 7 needs to be adjusted, the first screw 5 can continue to be rotated, and the gas continues to enter the annular cavity 902, but cannot drive the blade 904 to move. The gas can flow into the fourth ventilation cavity 906 and the gas buffer chamber 907 from the gap between the blade 904 and the annular cavity 902 to achieve gas caching. Similarly, when the first screw 5 rotates, due to the presence of a certain friction between the adapter slider 802 and the convex limiting groove 801, the telescopic airbag 803 will only begin to retract after the gas in the gas buffer chamber 907 and the annular cavity 902 flows back.

[0092] The present embodiment is described above, but the present embodiment is not limited to the above-mentioned specific implementation manner. The above-mentioned specific implementation manner is merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, which are all within the protection of the present embodiment.

Claims

1. A zinc-nickel battery positive electrode material, characterized in that: The positive electrode material of the zinc-nickel battery is a composite material of NiO, Ni(OH)2, cobalt oxide, manganese oxide, polyvinyl pyrrolidone and fluoride additives; The cobalt oxide is CoO or Co3O4; The manganese oxide is MnO or MnO2; The fluoride additive is LiF or NaF.

2. A method for preparing a positive electrode material for a zinc-nickel battery, characterized in that: The method for preparing a positive electrode material for a zinc-nickel battery as claimed in claim 1 comprises the following steps: Step S1, preparing NiO, Ni(OH)2, cobalt oxide, manganese oxide, polyvinyl pyrrolidone, and fluoride additive according to a set ratio, the set ratio is: NiO: 40%-60%; Ni(OH)2: 20%-30% Cobalt oxide: 10%-20%; Manganese oxide: 5%-10%; Polyvinylpyrrolidone: 1%-5%; Fluoride additive: 1%; Step S2, drying NiO, Ni(OH)2, cobalt oxide and manganese oxide at a drying temperature ranging from 100 to 120°C for 4 hours; Step S3, using a planetary ball mill, mixing and grinding the NiO, Ni(OH)2, cobalt oxide, manganese oxide and fluoride additive that have been dried in step S2, the mixing and grinding time is 6 hours, and the speed is set at 400r / min; Step S4, using a mold to apply a pressure of 10-15 MPa to press the mixture generated in step S3; Step S5, calcining the mixture after pressing in step S4, the calcination temperature is set to 300-500° C., the duration is 2-4 hours, and the inert gas flow rate is controlled at 200 mL / min; Step S6, naturally cooling the calcined product to room temperature; Step S7, using a high-energy ball mill to grind the cooled calcined product into particles of 50-100 μm, the grinding time is 1 h; Step S8: Add polyvinyl pyrrolidone to the crushed material, and add 10 ml of water or ethanol, and mix them thoroughly to obtain the positive electrode material of the zinc-nickel battery.

3. A zinc-nickel battery positive electrode material preparation system, characterized in that: The invention comprises a control console (1), a grinding portion (2) connected to the control console (1), a flip door (201) hinged on the grinding portion (2), a plurality of grinding seats (3) arranged in the grinding portion (2), a storage groove (301) arranged in the grinding seat (3), a plurality of position limiting through grooves (302) symmetrically arranged on the inner wall of the storage groove (301), a telescopic position limiting support mechanism (4) detachably connected to the grinding seat (3), a first screw rod (5) threadedly connected at the center position of the telescopic position limiting support mechanism (4), a telescopic gas storage mechanism (6) fixedly connected to the lower end of the first screw rod (5), and a sealing flange cover (6) movably connected to the lower end of the telescopic gas storage mechanism (6). 7), a plurality of movable nut mechanisms (8) and screw rotating mechanisms (9) uniformly distributed on the sealing flange cover (7), a second screw (905) arranged in the screw rotating mechanism (9), and a grinding jar (10) arranged in the grinding seat (3), the plurality of movable nut mechanisms (8) and the plurality of screw rotating mechanisms (9) are arranged correspondingly, the sealing flange cover (7) is movably connected to the grinding jar (10) through the plurality of movable nut mechanisms (8) and the screw rotating mechanism (9), the bottom of the grinding jar (10) contacts the bottom wall of the storage groove (301), and the plurality of movable nut mechanisms (8) are all connected to the internal space of the telescopic gas storage mechanism (6); The grinding jar (10) is provided with a plurality of connection holes matched with the movable nut mechanism (8) and the screw rotating mechanism (9); When the telescopic gas storage mechanism (6) is in an initial length state, the plurality of movable nut mechanisms (8) are all outside the coverage of the grinding jar (10); When the telescopic gas storage mechanism (6) is in a first set length state, the plurality of movable nut mechanisms (8) are respectively moved to positions coaxial with the plurality of connection holes, and the plurality of movable nut mechanisms (8) are respectively connected to corresponding screw rotating mechanisms (9); When the movable nut mechanism (8) is connected to the screw rotating mechanism (9), the telescopic gas storage mechanism (6) is used to drive the screw rotating mechanism (9) to screw the second screw (905) into the corresponding connecting hole and the movable nut mechanism (8) in sequence.

4. A zinc-nickel battery positive electrode material preparation system according to claim 3, characterized in that: The telescopic limiting support mechanism (4) comprises a middle limiting plate (401), a first telescopic rod (402) and a spring (403) symmetrically connected at two ends of the middle limiting plate (401), a limiting plug (404) connected to the other end of the first telescopic rod (402), and an elastic wedge (405) arranged at the upper end of the limiting plug (404), the thickness of the limiting plug (404) being the same as the height of the limiting groove (302), the spring (403) being sleeved on the outside of the first telescopic rod (402), and the two ends of the spring (403) being fixedly connected to the middle limiting plate (401) and the limiting plug (404) respectively.

5. A zinc-nickel battery positive electrode material preparation system according to claim 4, characterized in that: A screw hole matching the first screw rod (5) is provided at the middle position of the middle limiting plate (401), and a rotating handle is connected to the upper end of the first screw rod (5).

6. A zinc-nickel battery positive electrode material preparation system according to claim 5, characterized in that: The telescopic gas storage mechanism (6) comprises an upper connecting plate (601) fixedly connected to the lower end of the first screw rod (5), a second telescopic rod (602) and a telescopic bellows (603) fixedly connected to the lower end of the upper connecting plate (601), and a lower connecting ring (604) fixedly connected to the lower end of the telescopic bellows (603); an annular rotating groove matching the lower connecting ring (604) is provided on the sealing flange cover (7); a sealed gas storage chamber is formed between the upper connecting plate (601), the telescopic bellows (603), the lower connecting ring (604) and the sealing flange cover (7); and the annular ventilation groove (701) is connected to the sealed gas storage chamber.

7. A zinc-nickel battery positive electrode material preparation system according to claim 6, characterized in that: The sealing flange cover (7) is provided with an annular vent groove (701), and a plurality of movable nut mechanisms (8) are connected to the sealed air storage chamber via the annular vent groove (701).

8. A zinc-nickel battery positive electrode material preparation system according to claim 7, characterized in that: The movable nut mechanism (8) comprises a convex-shaped limiting slide groove (801) provided on the lower end surface of the sealing flange cover (7), an adapting slider (802) slidably connected to the inner wall of the convex-shaped limiting slide groove (801), a telescopic air bag (803) connected between the adapting slider (802) and the inner wall of the convex-shaped limiting slide groove (801), a first ventilation cavity (804) and a third ventilation cavity (806) provided inside the sealing flange cover (7), a second ventilation cavity (805) provided inside the adapting slider (802), and a Nut (807), the convex-shaped limiting groove (801) is distributed along the diameter direction of the sealing flange cover (7), the two ends of the first ventilation cavity (804) are respectively connected to the annular ventilation groove (701) and the telescopic airbag (803), one end of the second ventilation cavity (805) is connected to the telescopic airbag (803), when the telescopic airbag (803) is in the upper limit state of length, the other end of the second ventilation cavity (805) is connected to the third ventilation cavity (806), and the outer wall of the adapter slider (802) is in close contact with the inner wall of the convex-shaped limiting groove (801).

9. A zinc-nickel battery positive electrode material preparation system according to claim 8, characterized in that: The screw conveying mechanism (9) comprises a limiting through hole (901) provided on the sealing flange cover (7), an annular cavity (902) provided on the inner wall of the limiting through hole (901), an inner hexagonal rotating cylinder (903) slidably connected to the inner wall of the limiting through hole (901), a plurality of blades (904) fixedly connected to the outer wall of the inner hexagonal rotating cylinder (903), a fourth ventilation cavity (906) provided on the inner wall of the sealing flange cover (7), and a gas buffer chamber (907). Several blades (904) are located in the annular cavity (902), and there is a gap between the other end of several blades (904) and the inner wall of the annular cavity (902). The gas buffer chamber (907) is connected to the annular cavity (902) through the fourth ventilation cavity (906). An inclined air channel is provided between the annular cavity (902) and the third ventilation cavity (806), and the second screw (905) is provided in the inner hexagonal rotating cylinder (903).

10. A zinc-nickel battery positive electrode material preparation system according to claim 9, characterized in that: An internal thread matching the second screw rod (905) is provided on the inner wall of the position-limiting through hole (901) near the lower end opening.

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