Positive electrode powder blanking device and battery production line

Abstract

The utility model belongs to the technical field of battery processing, and discloses an anode powder blanking device and a battery production line. The positive electrode powder discharging device comprises a vibration discharging assembly, a material receiving assembly, a discharging control assembly and a carbon bag bin. Powder can flow out of an outlet of the vibration discharging assembly. The material receiving assembly comprises a discharging hopper, a material receiving bin and a first valve which communicate with one another, and a weighing part is arranged in the material receiving bin and is configured to measure the weight of distributed materials in the material receiving bin; the discharging control assembly is rotationally installed in the discharging hopper and is configured to intermittently discharge materials into the material receiving bin, and the discharging control assembly and the first valve are both in communication connection with the weighing part. After the first valve is opened, powder in the material receiving bin can fall into the carbon bag bin. The positive electrode powder discharging device and the battery production line can quantitatively control the weight of the carbon bags, ensure that the fluctuation range of each carbon bag is small, and improve the consistency of battery performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery processing technical field especially relates to a positive pole powder unloading device and battery production line. BACKGROUND

[0002] Lithium battery is the battery that current application is more extensive, can be divided into lithium primary battery and lithium secondary battery according to whether battery can be charged. However, both in the composition structure, are by positive pole, negative pole, diaphragm, electrolyte and shell composition. Among them, the positive pole of lithium primary battery generally has two kinds, one is pole piece type, one is the carbon package type of particle composition, and the negative pole is metal lithium;The positive pole of carbon package type is usually by many small particles to realize by extrusion.

[0003] For the positive pole forming process of lithium primary battery, its characteristics are high working voltage, up to 3.0V or more, small battery self-discharge, convenient for long time storage and use, so it is the largest battery in current commercial use, such as gas meter, electric meter, water meter and internet of things field.

[0004] However, due to the constraint of manufacturing level and process, lithium / thionyl chloride still has defects in process, such as positive pole carbon package particle unloading stability. Because carbon is usually by 1-4mm diameter particle to form by extrusion, the particle weight is very light and has static electricity, it is almost impossible to accurately weigh the weight of each particle, and the current commonly used method is fixed volume measurement, that is, under the condition that the apparent specific gravity density of each batch of particles is in a certain range, the particles pass through a fixed container to carry out fixed volume, so as to determine the weight of each formed carbon package. This way has three points to be guaranteed: one is that the apparent specific gravity density of each batch of particles must be consistent, two is that there must be no gap between particles, three is that the particles need to be static electricity eliminated. Due to the above problems, the weight of the carbon package fluctuates greatly, which directly affects the consistency of the capacity, voltage and other indicators of the battery.

[0005] Therefore, it is urgent to design a positive pole material unloading device and battery production line to solve the above problems. UTILITY MODEL CONTENTS

[0006] One purpose of the utility model is to provide a positive pole powder unloading device, which can quantitatively control the weight of carbon package, ensure that the fluctuation range of each carbon package is small, and improve the consistency of battery performance.

[0007] Another purpose of the utility model is to provide a battery production line, which produces battery positive pole weight stable, and the performance consistency of the battery is high.

[0008] In order to achieve this purpose, the utility model adopts the following technical scheme:

[0009] The positive electrode powder discharging device comprises:

[0010] The vibrating discharging assembly is configured to discharge the powder from an outlet thereof;

[0011] The receiving assembly comprises a discharging hopper, a receiving bin and a first valve, the receiving bin is provided with a weighing element, and the weighing element is configured to measure the weight of the powder in the receiving bin;

[0012] The discharging control assembly is rotatably installed in the discharging hopper, and the discharging control assembly is configured to intermittently discharge the powder into the receiving bin, the discharging control assembly and the first valve are both in communication connection with the weighing element;

[0013] The carbon package bin is configured to receive the powder in the receiving bin when the first valve is opened.

[0014] As an optional solution, the discharging control assembly comprises a third driving element and a third discharging roller, the third discharging roller is coaxially connected to an output end of the third driving element, the third driving element is configured to drive the third discharging roller to rotate, two sides of the discharging hopper are tangent to a circumferential side of the third discharging roller, the circumferential side of the third discharging roller is provided with at least one third discharging groove extending along an axial direction thereof, and the third driving element is in communication connection with the weighing element.

[0015] As an optional solution, the discharging control assembly comprises:

[0016] A first discharging roller and a second discharging roller are both rotatably connected to the discharging hopper, the circumferential side of the first discharging roller is tangent to the circumferential side of the second discharging roller, the circumferential side of the first discharging roller is tangent to a first side wall of the discharging hopper, the circumferential side of the second discharging roller is tangent to a second side wall of the discharging hopper, the first side wall and the second side wall are oppositely arranged, the circumferential side of the first discharging roller is provided with at least one first discharging groove extending along an axial direction thereof, the circumferential side of the second discharging roller is provided with at least one second discharging groove extending along an axial direction thereof, and a volume of the first discharging groove is greater than a volume of the second discharging groove.

[0017] A first driving element and a second driving element, the first discharging roller is coaxially connected to an output end of the first driving element, the first driving element is configured to drive the first discharging roller to rotate, the second discharging roller is coaxially connected to an output end of the second driving element, the second driving element is configured to drive the second discharging roller to rotate, and the first driving element and the second driving element are both in communication connection with the weighing element.

[0018] As an optional solution, two first discharging grooves are oppositely arranged along a radial direction of the first discharging roller; and / or

[0019] The second material discharging groove is provided with two, and the two second material discharging grooves are oppositely arranged along the radial direction of the second material discharging roller.

[0020] As an optional solution, the cross section of the first material discharging groove and / or the second material discharging groove is arc-shaped.

[0021] As an optional solution, the first driving member and the second driving member are staggered to start, the weight of the standard carbon package is M1, when the weight of the powder in the receiving bin reaches A*M1, the first driving member stops, the second driving member starts, and 80%≤A≤90%.

[0022] As an optional solution, the material discharging hopper is inverted conical.

[0023] As an optional solution, a storage bin is arranged between the receiving bin and the carbon package bin, the carbon package bin is arranged below the outlet of the storage bin, and a second valve is arranged at the outlet of the storage bin.

[0024] As an optional solution, the vibration material discharging assembly comprises:

[0025] A material guiding member is arranged in an inclined manner, and a material guiding passage is arranged in the material guiding member;

[0026] A material feeding member is connected to the high end of the material guiding member and communicates with the material guiding passage;

[0027] A vibration motor is arranged below the material guiding member and is configured to vibrate the material guiding member.

[0028] A battery production line comprises the positive electrode powder material discharging device.

[0029] The positive electrode powder material discharging device has the following advantages:

[0030] The positive electrode powder material discharging device comprises a vibration material discharging assembly, a material discharging control assembly, a receiving bin, a carbon package bin, a weighing member, a first valve and a second valve.

[0031] The utility model also provides a battery production line, including the positive pole powder unloading device above. The battery production line, the battery positive pole weight stability produced, the performance consistency of battery is high. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is the structure schematic diagram of positive pole powder unloading device provided by the utility model embodiment;

[0033] Figure 2 It is the structure schematic diagram of unloading control subassembly and hopper provided by the utility model embodiment.

[0034] In the drawing,

[0035] 10, vibration unloading assembly;11, guide material piece;111, guide material passage;12, feed piece;13, vibration motor;

[0036] 20, material receiving assembly;21, hopper;22, material receiving bin;23, weighing piece;

[0037] 30, unloading control assembly;31, first unloading roller;311, first unloading groove;32, second unloading roller;321, second unloading groove;

[0038] 40, carbon package bin;50, storage bin;51, second valve. DETAILED DESCRIPTION

[0039] The utility model makes further detailed explanation in combination with the drawings and embodiment. It can be understood that the specific embodiment described here is only used to explain the utility model, and is not limited to the utility model. In addition, it needs to be explained that in order to facilitate the description, only the part related to the utility model is shown in the drawing, not all structures.

[0040] In the description of the utility model, unless another explicit provision and limitation, the term " is connected " " is connected " " is fixed " should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integral;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0041] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature, can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature "on", "above" and "upper surface of" second feature includes that first feature is directly above and obliquely above second feature, or only indicates that first feature is higher than second feature in horizontal height. First feature "under", "below" and "under surface of" second feature includes that first feature is directly below and obliquely below second feature, or only indicates that first feature is lower than second feature in horizontal height.

[0042] In the description of the embodiment, the terms "upper", "lower", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0043] The embodiment provides a positive electrode powder discharging device, which can quantitatively control the weight of carbon package, ensure that the fluctuation range of each carbon package is small, and improve the consistency of battery performance. Figure 1 As shown in the figure, the positive electrode powder discharging device comprises a vibrating discharging assembly 10, a receiving assembly 20, a discharging control assembly 30 and a carbon package bin 40, powder can flow out from the outlet of the vibrating discharging assembly 10; the receiving assembly 20 comprises a discharging hopper 21, a receiving bin 22 and a first valve (not shown in the figure) in communication, the receiving bin 22 is provided with a weighing element 23, the weighing element 23 is configured to measure the weight of the separated powder in the receiving bin 22; the discharging control assembly 30 is rotatably installed in the discharging hopper 21, the discharging control assembly 30 is configured to intermittently discharge into the receiving bin 22, and the discharging control assembly 30 and the first valve are both in communication connection with the weighing element 23; after the first valve is opened, the powder in the receiving bin 22 can fall into the carbon package bin 40.

[0044] The positive electrode powder discharging device, the vibrating discharging assembly 10 first disperses the separated powder to make the separated powder enter the discharging hopper 21 in a more uniform state, and then falls on the discharging control assembly 30, and the discharging control assembly 30 intermittently feeds the separated powder into the receiving bin 22. Due to the arrangement of the weighing member 23, when the weight of the weighing member 23 reaches the standard weight M of the carbon package, the discharging control assembly 30 is in communication connection with the weighing member 23. At this time, the discharging control assembly 30 stops feeding the separated powder into the receiving bin 22, the first valve is opened, and the separated powder enters the carbon package bin 40. Even if the amount of the powder in the carbon package bin 40 is quantified, that is, through the intermittent feeding of the discharging control assembly 30, the discharging control assembly 30 can have a reaction time within the intermittent time, thereby ensuring that the powder in the receiving bin 22 is not overfed, and thereby improving the consistency of the battery performance.

[0045] In an alternative embodiment (not shown, but the third discharging roller can be referred to the first discharging roller 31 in Figure 1 The discharging control assembly 30 comprises a third driving member and a third discharging roller, the third discharging roller is coaxially connected to the output end of the third driving member, the third driving member can drive the third discharging roller to rotate, the two sides of the discharging hopper 21 are tangent to the circumferential side of the third discharging roller, the circumferential side of the third discharging roller is provided with at least one third discharging groove extending along the axial direction thereof, and the third driving member is in communication connection with the weighing member 23. Through the above arrangement, when the third discharging groove is rotated to the side facing the receiving bin 22, one third discharging groove volume of the separated powder is fed into the receiving bin 22 by driving the third discharging roller to rotate by the third driving member. Since one third discharging groove volume of the powder falls into the third discharging groove during each rotation, and the amount is small, it is basically ensured that the weight of each feeding is consistent, and it is avoided that the vibrating discharging assembly 10 directly feeds the powder into the receiving bin 22, causing the vibrating discharging assembly 10 to be unable to stop feeding in time when the weight reaches the standard value.

[0046] In this embodiment, the volume of the third discharging groove needs to be set to be small, so that when approaching the standard value of the carbon package, if the weight before the last feeding is less than the standard value and the weight after the last feeding is greater than the standard value, it is necessary to ensure that the finally obtained carbon package is within a process allowable tolerance range, so the amount of each feeding cannot be too large, and the feeding efficiency is low.

[0047] In order to solve the above problems, in the present embodiment, the third discharging roller is arranged to be in communication connection with the weighing member 23. Figure 1 and Figure 2As shown, the feeding control assembly 30 includes a first feeding roller 31, a second feeding roller 32, a first driving member, and a second driving member. Both the first feeding roller 31 and the second feeding roller 32 are rotatably connected to the feeding hopper 21. The circumference of the first feeding roller 31 is tangent to the circumference of the second feeding roller 32. The first feeding roller 31 is also tangent to the first side wall of the feeding hopper 21, and the second feeding roller 32 is also tangent to the second side wall of the feeding hopper 21. The first and second side walls are opposite to each other. At least one opening along its axis is formed on the circumference of the first feeding roller 31. The first feeding trough 311 extends towards the second feeding roller 32. At least one second feeding trough 321 extending axially is formed on the periphery of the second feeding roller 32. The volume of the first feeding trough 311 is larger than the volume of the second feeding trough 321. The first feeding roller 31 is coaxially connected to the output end of the first driving member. The first driving member can drive the first feeding roller 31 to rotate. The second feeding roller 32 is coaxially connected to the output end of the second driving member. The second driving member can drive the second feeding roller 32 to rotate. Both the first driving member and the second driving member are communicatively connected to the weighing member 23.

[0048] In the above setup, the weight of the standard carbon pack is set to M1. When the feeding control component 30 feeds the material into the receiving bin 22, the first drive component is activated to drive the first feeding roller 31 to rotate, while the second drive component remains stationary. Since the volume of the first feeding trough 311 is large, the amount of material fed each time is also large, and the feeding time is shortened significantly. The first feeding roller 31 is used to feed most of M1 into the receiving bin 22. When a certain proportion is reached, the weighing component 23 senses it, and the first drive component stops. The second drive component then drives the second feeding roller 32 to feed the material. Since the amount of material fed by the second feeding roller 32 each time is smaller, it can be ensured that the carbon packs obtained after the final feeding will not exceed M1 by much, that is, within the tolerance range of M1. Therefore, the combination of "coarse feeding" and "fine feeding" can save a lot of feeding time and improve feeding efficiency.

[0049] Optionally, when the weight of powder in the receiving hopper 22 reaches A*M1, the first drive unit stops and the second drive unit starts, with 80% ≤ A ≤ 90%. In this embodiment, A = 85%. In other embodiments, A = 80%, 82%, 88%, 90%, etc., which are not limited here.

[0050] Optionally, such as Figure 2 As shown, two first feeding troughs 311 are provided, and the two first feeding troughs 311 are arranged opposite each other radially along the first feeding roller 31; and / or two second feeding troughs 321 are provided, and the two second feeding troughs 321 are arranged opposite each other radially along the second feeding roller 32. With the above arrangement, the first feeding roller 31 and the second feeding roller 32 can complete two feedings in one revolution, thereby improving the feeding efficiency.

[0051] Optionally, such as Figure 2As shown, the cross-section of the first feeding trough 311 and / or the second feeding trough 321 is arc-shaped. This shape of feeding trough has no sharp points, making it less prone to material jamming. In other embodiments, the shapes of the first feeding trough 311 and the second feeding trough 321 can also be rectangular or V-shaped, which is not limited here.

[0052] Optionally, the hopper 21 is inverted cone-shaped, which allows the material to flow smoothly downwards. It is understood that... Figure 1 The feed hopper 21, the first feed roller 31, and the second feed roller 32 all extend in the direction perpendicular to the diagram to ensure that they are tangent to each other.

[0053] Optionally, such as Figure 1 As shown, a storage silo 50 is provided between the receiving silo 22 and the carbon bag silo 40. The carbon bag silo 40 is located below the outlet of the storage silo 50, and a second valve 51 is provided at the outlet of the storage silo 50. Through the above arrangement, the storage silo 50 serves as a transfer and storage device, and prevents the weighing device 23 from malfunctioning and causing incorrectly weighed powder to directly enter the carbon bag silo 40.

[0054] Optionally, such as Figure 1 As shown, the vibrating feeding assembly 10 includes a guide component 11, a feed component 12, and a vibrating motor 13. The guide component 11 is inclined and has a feeding channel 111 inside. The feed component 12 is connected to the high end of the guide component 11 and communicates with the feeding channel 111. The vibrating motor 13 is located on the lower side of the guide component 11 and is configured to vibrate the guide component 11. With the above configuration, after the powder enters from the feed component 12, the vibration motor 13 vibrates the guide component 11, making the powder more uniform and reducing the generation of static electricity, clumping, and bridging phenomena.

[0055] This embodiment also provides a battery production line, including the aforementioned positive electrode powder feeding device. This battery production line produces batteries with stable positive electrode weight and high battery performance consistency.

[0056] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A positive electrode powder dispensing device, characterized by comprising: The application relates to a powder feeding device. The powder feeding device comprises: a vibrating feeder (10) from which powder can flow out of an outlet of the vibrating feeder (10); a receiving assembly (20) comprising a feeder hopper (21), a receiving bin (22) and a first valve, the receiving bin (22) being provided with a weighing element (23) configured to measure the weight of the powder in the receiving bin (22); a feeder control assembly (30) rotatably installed in the feeder hopper (21), the feeder control assembly (30) being configured to intermittently discharge powder into the receiving bin (22), the feeder control assembly (30) and the first valve being in communication with the weighing element (23); and 2. The positive electrode powder dispensing device according to claim 1, wherein a carbon-containing bin (40) into which the powder in the receiving bin (22) can fall when the first valve is opened.

3. The positive electrode powder dispensing device according to claim 1, wherein The feeder control assembly (30) comprises a third driving element and a third feeder roller coaxially connected to an output end of the third driving element, the third driving element being capable of driving the third feeder roller to rotate, two sides of the feeder hopper (21) being tangent to a circumferential side of the third feeder roller, the circumferential side of the third feeder roller being provided with at least one third feeder groove extending along an axial direction of the third feeder roller, and the third driving element being in communication with the weighing element (23). The feeder control assembly (30) comprises: a first feeder roller (31) and a second feeder roller (32) both rotatably connected to the feeder hopper (21), a circumferential side of the first feeder roller (31) being tangent to a circumferential side of the second feeder roller (32), the first feeder roller (31) being tangent to a first side wall of the feeder hopper (21) at the same time, the second feeder roller (32) being tangent to a second side wall of the feeder hopper (21) at the same time, the first side wall being opposite to the second side wall, the circumferential side of the first feeder roller (31) being provided with at least one first feeder groove (311) extending along an axial direction of the first feeder roller (31), and the circumferential side of the second feeder roller (32) being provided with at least one second feeder groove (321) extending along an axial direction of the second feeder roller (32), a volume of the first feeder groove (311) being greater than a volume of the second feeder groove (321); 4. The positive electrode powder dispensing device according to claim 3, wherein a first driving element and a second driving element, the first feeder roller (31) being coaxially connected to an output end of the first driving element, the first driving element being capable of driving the first feeder roller (31) to rotate, the second feeder roller (32) being coaxially connected to an output end of the second driving element, the second driving element being capable of driving the second feeder roller (32) to rotate, and the first driving element and the second driving element both being in communication with the weighing element (23). The first feeder groove (311) is provided with two first feeder grooves (311) opposite to each other along a radial direction of the first feeder roller (31); and / or 5. The positive electrode powder dispensing device according to claim 3, wherein The second feeder groove (321) is provided with two second feeder grooves (321) opposite to each other along a radial direction of the second feeder roller (32). The first feeder groove (311) and / or the second feeder groove (321) has an arc-shaped cross section.

6. The positive electrode powder dispensing device according to claim 3, wherein The first driving member and the second driving member are staggered to start, the weight of the standard carbon package is M1, when the weight of the powder in the receiving bin (22) reaches A*M1, the first driving member stops, and the second driving member starts, 80%≤A≤90%.

7. The positive electrode powder dispensing device according to any one of claims 1 to 6, wherein The lower hopper (21) is in an inverted conical shape.

8. The positive electrode powder dispensing device according to any one of claims 1 to 6, wherein A storage bin (50) is arranged between the receiving bin (22) and the carbon package bin (40), the carbon package bin (40) is arranged at the lower side of the outlet of the storage bin (50), and the outlet of the storage bin (50) is provided with a second valve (51).

9. The positive electrode powder dispensing device according to any one of claims 1 to 6, wherein The vibrating hopper assembly (10) comprises: A guide member (11) is arranged in an inclined manner, and a guide channel (111) is formed in the guide member (11); An inlet member (12) is connected to the high end of the guide member (11) and communicates with the guide channel (111); A vibrating motor (13) is arranged at the lower side of the guide member (11) and is configured to vibrate the guide member (11).

10. A battery production line, characterized by The positive electrode powder feeding device comprises the positive electrode powder feeding device according to any one of claims 1-9. The first driving member and the second driving member are staggered to start, the weight of the standard carbon package is M1, when the weight of the powder in the receiving bin (22) reaches A*M1, the first driving member stops, and the second driving member starts, 80%≤A≤90%.

Images