Feeding device and battery production apparatus

Abstract

A feeding device (100) and a battery production apparatus. The feeding device (100) comprises: a glove box (10) used for accommodating materials to be fed; and a first negative-pressure assembly (20) connected to the glove box (10) and used for extracting air from the interior of the glove box (10) and controlling the interior of the glove box (10) to maintain a negative-pressure state, wherein the first negative-pressure assembly (20) comprises an inflation member and a control member; a vent is formed in the glove box (10); the inflation member is in communication with the vent; and the control member is connected to both the glove box (10) and the inflation member, and is used for adjusting the air extraction volume of the inflation member so as to control the interior of the glove box (10) to maintain the negative-pressure state. By means of the provision of the first negative-pressure assembly (20), the interior of the glove box (10) maintains the negative-pressure state, and when unpacking and feeding are operated in the glove box (10), the problem of powder overflow can be effectively reduced, making the operation process safer.

Description

Feeding device and battery production equipment

[0001] Cross-reference to related applications

[0002] This application is based on the Chinese Patent Application No. 2024212831240 entitled "Feeding device and battery production equipment" filed on June 06, 2024, which is incorporated by reference in its entirety into this application. TECHNICAL FIELD

[0003] The present application relates to the technical field of batteries, in particular to a feeding device and a battery production equipment. BACKGROUND

[0004] The electrode assembly is the component in which the electrochemical reaction specifically occurs in the battery cell, and in the manufacturing process of the electrode assembly, the positive and negative electrode slurries need to be coated on the electrode sheet. The raw materials of the positive and negative electrode slurries are stored in ton bags, and therefore the ton bags of raw materials need to be transported to the feeding device for unpacking and feeding.

[0005] However, in the current unpacking and feeding process, the problem of powder leakage easily occurs, which causes some flammable and explosive powders to be exposed, thereby existing certain safety hazards.

[0006] SUMMARY

[0007] Based on this, the present application provides a feeding device and a battery production equipment.

[0008] In a first aspect, the present application provides a feeding device, comprising a glove box and a first negative pressure assembly, the glove box being used for accommodating materials to be fed; the first negative pressure assembly is connected with the glove box and is used for introducing gas into the glove box and controlling the internal negative pressure state of the glove box. The first negative pressure assembly comprises a gas filling member and a control member, the glove box is provided with a gas inlet, and the gas filling member is in communication with the gas inlet; the control member is connected with the glove box and the gas filling member respectively, and is used for adjusting the gas filling amount of the gas filling member to control the internal negative pressure state of the glove box.

[0009] Therefore, through the above structure, when the materials are unpacked and fed in the glove box, the problem of powder overflow can be effectively reduced due to the negative pressure state in the glove box, the probability of powder leakage is reduced, and the safety of the operation process is improved.

[0010] Further, through the mutual cooperation between the gas filling member and the control member, the internal environment of the glove box can be stably maintained in a negative pressure state.

[0011] In some embodiments, the control member comprises a control valve and a pressure sensor, the control valve is arranged on the gas filling member and is used for controlling the opening and closing of the gas filling member, and the pressure sensor is used for detecting the pressure in the glove box to control the opening and closing of the control valve.

[0012] Through the above structure, the actual pressure in the glove box can be detected in time, and the opening and closing of the control valve can be flexibly adjusted according to the actual pressure, so as to control the amount of air in the glove box, and make the inside of the glove box more stably maintain in a negative pressure state.

[0013] In some embodiments, the first negative pressure assembly further comprises a first dust remover connected with the glove box, and the first dust remover is used for dust removal inside the glove box.

[0014] Therefore, in the process of unpacking the material, the first dust remover can perform dust removal treatment on the inside of the glove box, reducing the probability of powder or gas overflow during unpacking.

[0015] In some embodiments, the material feeding device further comprises a first filter arranged between the aeration member and the air inlet, and the first filter is used for filtering dust entering the aeration member through the air inlet.

[0016] Therefore, by arranging the first filter, the powder in the glove box can be filtered, preventing the powder from entering the aeration member through the air inlet, thereby preventing the powder from overflowing to the external environment.

[0017] In some embodiments, a first discharge port is arranged on the glove box, and the material feeding device further comprises a buffer tank and a second negative pressure assembly connected with each other, the buffer tank is in communication with the first discharge port and is arranged below the glove box along the gravity direction, and the second negative pressure assembly is used for introducing inert gas into the buffer tank and controlling the inside of the buffer tank to maintain a negative pressure state.

[0018] Through the above structure, the powder after unpacking can be temporarily stored, and a negative pressure state can be formed in the buffer tank, reducing the probability of powder overflow during discharging. In addition, the second negative pressure assembly can be used to introduce inert gas into the buffer tank to make the material more secure after entering the buffer tank.

[0019] In some embodiments, the material feeding device further comprises a vibrating member arranged on the outer wall of the glove box. When the powder in the glove box is discharged to the buffer tank through the first discharge port, the vibrating member is started to assist in discharging, so that the discharging is more thorough and the discharging precision is improved.

[0020] In some embodiments, the material feeding device further comprises a second filter arranged on the second negative pressure assembly, and the second filter is used for filtering dust entering the second negative pressure assembly.

[0021] Therefore, by arranging the second filter, the powder in the buffer tank can be filtered, preventing the powder from overflowing to the external environment.

[0022] In some embodiments, the material feeding device further comprises a weighing sensor arranged on the buffer tank, and the weighing sensor is used for measuring the total weight of the buffer tank and the material inside the buffer tank.

[0023] Through the above structure, the weight of the material entering the buffer tank can be accurately measured during the blanking process, so that the mixing ratio of the subsequent material is better controlled, and the feeding accuracy is improved.

[0024] In some embodiments, a second discharge port is formed on the buffer tank, and the feeding device further comprises a stirring assembly and a third negative pressure assembly connected with each other, a feeding pipeline of the stirring assembly is in communication with the second discharge port, and the third negative pressure assembly is used for introducing gas into the stirring assembly and controlling the stirring assembly to maintain a negative pressure state.

[0025] Through the stirring assembly, the weighed powder in the buffer tank can smoothly enter the stirring assembly and be mixed. At the same time, the third negative pressure assembly can maintain a negative pressure state in the stirring assembly, so that the powder overflow during stirring is avoided, thereby improving the safety of the stirring process.

[0026] In some embodiments, the feeding device further comprises a cleaning tool, which is movably arranged in the feeding pipeline of the stirring assembly and is used for cleaning the residual material in the feeding pipeline.

[0027] Through the above structure, the residual material in the feeding pipeline of the stirring assembly can be cleaned, so that the material in the buffer tank can more smoothly enter the stirring assembly and be mixed.

[0028] In a second aspect, the application further provides a battery production equipment comprising the feeding device as described above.

[0029] The above feeding device and battery production equipment can maintain a negative pressure state in the glove box through the first negative pressure assembly, which can effectively reduce the problem of powder overflow when unpacking and feeding in the glove box, thereby making the operation process safer. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings.

[0031] FIG. 1 is a schematic diagram of the overall structure of the feeding device according to one or more embodiments.

[0032] The reference signs are as follows: 100, feeding device; 10, glove box; 20, first negative pressure assembly; 30, first filter; 40, buffer tank; 50, second negative pressure assembly; 60, vibrating member; 70, second filter; 80, weighing sensor; 21, pressure sensor; 22, first dust remover; 91, stirring assembly; 92, third negative pressure assembly; 93, cleaning member. DETAILED DESCRIPTION

[0033] In order to make the above objectives, characteristics and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways other than those described herein without departing from the spirit of the present application, and it is understood that similar modifications will be made by those skilled in the art in the art without departing from the scope of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0036] In the present application, unless otherwise specifically defined and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In this application, unless otherwise explicitly specified and limited, if there is a description of a first feature "on" or "under" a second feature, etc., it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "on", "above" and "over" the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the first feature is lower in horizontal height than the second feature.

[0038] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be an intermediate element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for illustrative purposes and do not represent the only implementation.

[0039] At present, from the development of market situation, the application of power battery is more and more widely. Power battery is not only applied to energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles and other fields. With the continuous expansion of the application field of power battery, the market demand is also increasing.

[0040] The electrode assembly is the component in which the electrochemical reaction is specifically generated in the battery monomer, and in the manufacturing process of the electrode assembly, the positive and negative electrode paste needs to be coated on the electrode sheet, and the raw materials of the positive and negative electrode paste are stored in ton bags, so the raw material ton bag needs to be transported to the feeding device for unpacking and feeding.

[0041] There are many kinds of powders in the raw materials of the positive and negative electrode paste, some of which are flammable and explosive dangerous powders, so the safety in the unpacking and feeding process is very important.

[0042] However, the current unpacking and feeding process is prone to powder leakage, which causes the flammable and explosive dangerous powder to be exposed to the air after leakage, to react with water in the air to produce hydrogen sulfide, or to increase the risk of explosion after the flammable and explosive dangerous powder leaks.

[0043] Based on the above considerations, in order to solve the problem of powder leakage in the current unpacking and feeding process, one or more embodiments of the present application provide a feeding device. By setting the first negative pressure assembly, the glove box is kept in a negative pressure state. When unpacking and feeding in the glove box, the problem of powder overflow can be effectively reduced, thereby making the operation process safer.

[0044] Referring to FIG. 1, one embodiment of the present application provides a feeding device 100, which includes a glove box 10 and a first negative pressure assembly 20. The glove box 10 is used to contain the material to be fed. The first negative pressure assembly 20 is connected to the glove box 10 and is used to introduce gas into the glove box 10 and control the internal negative pressure of the glove box 10.

[0045] It should be noted that the feeding device 100 of the present application can be applied to the unpacking and feeding process of some dangerous powder in the battery production process, of course, it can also be applied to the unpacking and feeding process of other ordinary powder.

[0046] The glove box 10 refers to a structure that can contain the material to be fed inside and can operate the material in the box through the glove. The inside of the glove box 10 is hollow, and a connecting port is provided on the box body, and the glove is sealed and connected to the connecting port. In this way, the operator can operate the material in the box through the glove by putting his hand into the glove. The material to be fed can be a raw material with certain danger in the battery production process.

[0047] The first negative pressure assembly 20 refers to a structure that can form a negative pressure state in the glove box 10 and keep the internal negative pressure of the glove box 10. The first negative pressure assembly 20 can introduce gas into the glove box 10, and the pressure in the glove box 10 can be adjusted by controlling the introduced gas, so as to control the internal negative pressure of the glove box 10 to a certain value.

[0048] Specifically, the gas introduced by the first negative pressure assembly 20 into the glove box 10 is low-humidity compressed air, and the dew point of the low-humidity compressed air is-60℃. In addition, the first negative pressure assembly 20 controls the negative pressure value in the glove box 10 to about 0.2Kpa, so that a micro-negative pressure state is formed in the glove box 10.

[0049] Therefore, when the material is unpacked and fed in the glove box 10, since the glove box 10 is in a negative pressure state, the problem of powder overflow can be effectively reduced, the probability of powder leakage can be reduced, and the safety of the operation process can be improved.

[0050] In some embodiments, the first negative pressure assembly 20 comprises an air charging member (not shown in the figure) and a control member, and the glove box 10 is provided with an air inlet, and the air charging member is in communication with the air inlet. The control member is connected with the glove box 10 and the air charging member respectively, and is used for adjusting the air charging amount of the air charging member to control the internal negative pressure state of the glove box 10.

[0051] Specifically, the air charging member can be but is not limited to an air inlet pipe. The glove box 10 is provided with an air inlet at the top, and the air inlet pipe is in communication with the air inlet, and low-humidity compressed air is introduced into the glove box 10 through the air inlet pipe.

[0052] Further, the control member can obtain the real-time pressure inside the glove box 10, and adjust the air charging amount of the air inlet pipe according to the real-time pressure. For example, when the real-time pressure inside the glove box 10 is lower than a preset pressure value, the air inlet pipe is controlled to introduce air into the glove box 10. When the real-time pressure inside the glove box 10 is higher than the preset pressure value, the air inlet pipe is controlled to stop introducing air.

[0053] Therefore, through the cooperation between the air charging member and the control member, the internal environment of the glove box 10 can be stably maintained in a negative pressure state.

[0054] In some embodiments, the control member comprises a control valve (not shown in the figure) and a pressure sensor 21, the control valve is arranged on the air charging member and is used for controlling the opening and closing of the air charging member, and the pressure sensor 21 is used for detecting the pressure inside the glove box 10 to control the opening and closing of the control valve.

[0055] Specifically, the control valve is arranged on the air inlet pipe and is used for controlling the opening and closing of the air inlet pipe. When the control valve is opened, the air inlet pipe is in a communication state, and at this time, low-humidity compressed air can be introduced into the glove box 10 through the air inlet pipe. When the control valve is closed, the air inlet pipe is in a disconnected state, and at this time, the introduction of low-humidity compressed air into the glove box 10 is stopped.

[0056] Further, the pressure sensor 21 is arranged on the glove box 10 and can detect the actual pressure inside the glove box 10. In this way, the pressure sensor 21 can detect the pressure inside the glove box 10 in real time and transmit the pressure information to the controller, and the controller can adjust the opening or closing of the control valve according to the pressure information, so as to achieve the purpose of adjusting the air charging amount.

[0057] Through the above structure, the actual pressure inside the glove box 10 can be detected in time, and the opening and closing of the control valve can be flexibly adjusted according to the actual pressure, so as to control the air charging amount in the glove box 10, and the internal environment of the glove box 10 can be more stably maintained in a negative pressure state.

[0058] In some embodiments, the first negative pressure assembly 20 further comprises a first dust remover 22 connected with the glove box 10, and the first dust remover 22 is used for dust removal inside the glove box 10.

[0059] Specifically, the first dust remover 22 can be, but is not limited to, a secondary dust remover, and the first dust remover 22 is connected with the glove box 10. During the unpacking process, the first dust remover 22 can perform dust removal on the inside of the glove box 10, thereby reducing the probability of powder or gas overflowing during the unpacking process.

[0060] In some embodiments, the feeding device 100 further comprises a first filter 30 arranged between the aeration member and the air inlet, and the first filter 30 is used to filter the dust entering the aeration member through the air inlet.

[0061] Specifically, the first filter 30 is arranged at the top of the glove box 10 and corresponds to the air inlet. During the unpacking process, the air inlet is connected with the outside through the air inlet pipeline, and the air is introduced into the glove box 10 through the air inlet pipeline. At this time, the powder in the unpacking process can enter the air inlet pipeline from the air inlet.

[0062] Therefore, by arranging the first filter 30, the powder in the glove box 10 can be filtered, and the powder is prevented from entering the aeration member through the air inlet, thereby preventing the powder from overflowing to the outside environment.

[0063] In some embodiments, a first discharge port (not shown in the figure) is arranged on the glove box 10, and the feeding device 100 further comprises a buffer tank 40 and a second negative pressure assembly 50 connected with each other. The buffer tank 40 is connected with the first discharge port and is arranged below the glove box 10 in the direction of gravity, and the second negative pressure assembly 50 is used to introduce inert gas into the buffer tank 40 and control the buffer tank 40 to maintain a negative pressure state.

[0064] Specifically, the first discharge port is arranged at the bottom of the glove box 10. In order to make the discharging process more smooth, the glove box 10 can also be arranged in a structure of wide at the top and narrow at the bottom, so that the material can enter the first discharge port through the inclined surface at the bottom of the glove box 10 and be discharged from the first discharge port.

[0065] The buffer tank 40 refers to a structure capable of temporarily storing the material and rechecking the weight of the material. The buffer tank 40 is arranged below the glove box 10 in the direction of gravity and is connected with the first discharge port. In this way, the material can enter the buffer tank 40 from the first discharge port under the action of gravity.

[0066] Further, the second negative pressure assembly 50 is connected with the buffer tank 40 and can introduce inert gas into the buffer tank 40 to maintain a negative pressure state in the buffer tank 40.

[0067] The structure of the second negative pressure assembly 50 can be the same as that of the first negative pressure assembly 20, that is, the second negative pressure assembly 50 also includes an air inlet pipeline, a control valve, and a pressure sensor 21, and the control valve is arranged on the air inlet pipeline to control the opening and closing of the air inlet pipeline. The pressure sensor 21 is arranged on the buffer tank 40 and can detect the actual pressure in the buffer tank 40. In this way, the pressure sensor 21 can detect the pressure in the buffer tank 40 in real time and transmit the pressure information to the controller, and the controller can adjust the opening or closing of the control valve according to the pressure information, thereby achieving the purpose of adjusting the air charge.

[0068] In addition, the inert gas introduced into the buffer tank 40 by the second negative pressure assembly 50 can be nitrogen. Specifically, before the material is dropped, nitrogen is first introduced into the buffer tank 40 by the second negative pressure assembly 50, which can displace the original gas in the buffer tank 40, preventing the powder entering the buffer tank 40 after the material is dropped from reacting with the original gas in the buffer tank 40 to cause some safety hazards.

[0069] It should be noted that other structures such as a stirring assembly are usually arranged downstream of the buffer tank 40. When the stirring assembly is arranged, the powder is mixed and stirred in the stirring assembly, which may produce some dangerous gas that may enter and stay in the buffer tank 40.

[0070] During the material dropping process, when the powder in the glove box 10 falls into the buffer tank 40, the powder may react with the original dangerous gas in the buffer tank 40, which poses a certain safety hazard.

[0071] Therefore, before the material dropping starts, nitrogen is introduced into the buffer tank 40 by the second negative pressure assembly 50 to displace the original gas in the buffer tank 40, thereby improving the safety of the material dropping process.

[0072] Through the above structure, the powder after unpacking can be temporarily stored, and a negative pressure state is formed in the buffer tank 40, thereby reducing the probability of powder overflow during the material dropping process. In addition, the second negative pressure assembly 50 can be used to introduce inert gas into the buffer tank 40 to make the material entering the buffer tank 40 more secure.

[0073] In some embodiments, the material dropping device 100 further includes a vibrating member 60 arranged on the outer wall of the glove box 10.

[0074] Specifically, the vibrating member 60 can be a vibration hammer and is arranged on the outer wall of the glove box 10. When the powder in the glove box 10 is dropped to the buffer tank 40 through the first discharge port, the vibration hammer is turned on to assist the material dropping, so that the material dropping is more complete and the material dropping accuracy is improved.

[0075] In some embodiments, the feeding device 100 further comprises a second filter 70 arranged on the second negative pressure assembly 50, and the second filter 70 is used to filter the dust entering the second negative pressure assembly 50.

[0076] Specifically, the structure of the second filter 70 can be arranged to be the same as that of the first filter 30, and is also used to filter the powder during the feeding process, so as to prevent the powder from entering the external environment through the air inlet pipeline of the second negative pressure assembly 50.

[0077] Therefore, by arranging the second filter 70, the powder in the buffer tank 40 can be filtered to prevent the powder from overflowing to the external environment.

[0078] In some embodiments, the feeding device 100 further comprises a weighing sensor 80 arranged on the buffer tank 40, and the weighing sensor 80 is used to measure the total weight of the buffer tank 40 and the material inside it.

[0079] Specifically, the weighing sensor 80 can measure the total weight of the buffer tank 40 and the material inside it. Before feeding, the buffer tank 40 is hollow inside, and at this time the weighing sensor 80 weighs it to obtain the weight of the buffer tank 40 itself.

[0080] As the feeding proceeds, the powder falls from the glove box 10 into the buffer tank 40. At the same time, the change value measured by the weighing sensor 80 is the total amount of the powder entering the buffer tank 40. When the weight of the powder detected by the weighing sensor 80 reaches the target weight, the feeding valve between the buffer tank 40 and the glove box 10 can be closed to stop the feeding.

[0081] Through the above structure, the weight of the material entering the buffer tank 40 can be accurately measured during the feeding process, so as to better control the mixing ratio of the subsequent material and improve the feeding accuracy.

[0082] In some embodiments, a second discharge port is arranged on the buffer tank 40, and the feeding device 100 further comprises a stirring assembly 91 and a third negative pressure assembly 92 connected with each other, a feeding pipeline of the stirring assembly 91 communicates with the second discharge port, and the third negative pressure assembly 92 is used to introduce gas into the stirring assembly 91 and control the stirring assembly 91 to maintain a negative pressure state inside.

[0083] Specifically, the bottom of the buffer tank 40 is provided with a second discharge port, and the stirring assembly 91 communicates with the second discharge port, so that the powder in the buffer tank 40 can enter the stirring assembly 91 through the second discharge port.

[0084] The stirring assembly 91 can comprise a stirring tank, and the stirring tank communicates with the buffer tank 40 through the second discharge port, so that the weighed powder in the buffer tank 40 can smoothly enter the stirring tank for stirring and mixing.

[0085] The third negative pressure assembly 92 is connected with the stirring tank and can introduce inert gas into the stirring tank to maintain a negative pressure state in the stirring tank.

[0086] The third negative pressure assembly 92 can have the same structure as the first negative pressure assembly 20 and the second negative pressure assembly 50, i.e., the third negative pressure assembly 92 can also include an air inlet pipeline, a control valve, and a pressure sensor 21. The control valve is arranged on the air inlet pipeline and is used to control the opening and closing of the air inlet pipeline. The pressure sensor 21 is arranged on the stirring tank and can detect the actual pressure in the stirring tank. In this way, the pressure sensor 21 can detect the pressure in the stirring tank in real time and transmit the pressure information to the controller. The controller can adjust the opening or closing of the control valve according to the pressure information, thereby achieving the purpose of adjusting the amount of air.

[0087] The stirring assembly 91 is arranged to enable the weighed powder in the buffer tank 40 to smoothly enter the stirring assembly 91 and be stirred and mixed. At the same time, the third negative pressure assembly 92 can maintain a negative pressure state in the stirring assembly 91 to avoid the overflow of powder during stirring, thereby improving the safety of the stirring process.

[0088] In some embodiments, the feeding device 100 further includes a cleaning element 93 movably arranged in the feeding pipeline of the stirring assembly 91 and used to remove residual material in the feeding pipeline.

[0089] Specifically, when the powder is stirred and mixed in the stirring assembly 91 and reacts, a part of the powder can enter the feeding pipeline of the stirring assembly 91 and stay in the feeding pipeline to form a blockage. Therefore, before feeding of the stirring assembly 91, the residual material in the feeding pipeline is first removed by the cleaning element 93, so that the material in the buffer tank 40 can more smoothly enter the stirring assembly 91.

[0090] The cleaning element 93 can be but is not limited to a cleaning air cylinder movably arranged in the feeding pipeline. Through the movement of the cleaning air cylinder in the feeding pipeline, the residual material in the feeding pipeline can be removed, thereby achieving the removal of the material.

[0091] Through the above structure, the residual material in the feeding pipeline of the stirring assembly 91 can be removed, so that the material in the buffer tank 40 can more smoothly enter the stirring assembly 91 and be stirred and mixed.

[0092] Based on the same concept as the above feeding device 100, the application also provides a battery production equipment comprising the feeding device 100 as described above. Wherein, the feeding device 100 can unpack and feed the raw materials of the positive and negative electrode slurries, and mix various materials to form the positive and negative electrode slurries, and then coat the positive and negative electrode slurries on the pole piece to form the electrode assembly.

[0093] According to one or more embodiments, in use, first open the box door of the glove box 10, put the material package into the glove box 10 and close the box door. Low humidity compressed air is introduced into the glove box 10, and the negative pressure value in the glove box 10 is controlled to be about 0.2 Kpa. At the same time, the material package is unpacked and fed by the glove box 10, so that the powder falls into the glove box 10 for temporary storage.

[0094] After feeding, first introduce nitrogen into the buffer tank 40 to replace the original gas in the buffer tank 40, and control the negative pressure value in the buffer tank 40 to be about 0.2 Kpa. Then open the feeding valve between the glove box 10 and the buffer tank 40, so that the powder in the glove box 10 can fall into the buffer tank 40. At the same time, the hammer is opened to assist the feeding, so that the powder can enter the buffer tank 40 more thoroughly.

[0095] The weighing sensor 80 on the buffer tank 40 performs real-time weighing, and when the weight of the powder entering the buffer tank 40 reaches the target weight, the feeding valve is closed, and the feeding is completed.

[0096] After the feeding is completed, the cleaning element 93 controls the feeding pipe of the stirring assembly 91 to perform the cleaning operation, and then the valve between the buffer tank 40 and the stirring assembly 91 is opened, so that the powder in the buffer tank 40 can smoothly enter the stirring assembly 91. At the same time, nitrogen is continuously introduced into the stirring assembly 91, and the negative pressure value in the stirring assembly 91 is controlled to be about 0.2 Kpa to form a micro-negative pressure environment.

[0097] When the data of the weighing sensor 80 on the buffer tank 40 no longer decreases, it means that the powder in the buffer tank 40 has been completely discharged, at which time all the valves are closed, and the whole feeding and feeding process is completed.

[0098] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered as the scope of the present application.

[0099] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A feeding device, comprising: a glove box for containing material to be fed; and a first negative pressure assembly connected with the glove box for feeding gas into the glove box and controlling the glove box to maintain a negative pressure state; the first negative pressure assembly comprises a gas feeding member and a control member, the glove box is provided with a gas inlet, the gas feeding member is in communication with the gas inlet; the control member is connected with the glove box and the gas feeding member respectively, for adjusting the gas feeding amount of the gas feeding member to control the glove box to maintain a negative pressure state.

2. The dosing device of claim 1, wherein, The control member comprises a control valve and a pressure sensor, the control valve is arranged on the gas feeding member and is used for controlling the opening and closing of the gas feeding member, and the pressure sensor is used for detecting the pressure in the glove box to control the opening and closing of the control valve.

3. The dosing device according to claim 1 or 2, wherein The first negative pressure assembly further comprises a first dust collector connected with the glove box, and the first dust collector is used for dust removal inside the glove box.

4. The dosing device according to any one of claims 1 to 3, wherein The feeding device further comprises a first filter arranged between the gas feeding member and the gas inlet, and the first filter is used for filtering dust entering the gas feeding member from the gas inlet.

5. The dosing device according to any one of claims 1 to 4, wherein The glove box is provided with a first discharge port, and the feeding device further comprises a buffer tank and a second negative pressure assembly connected with each other, the buffer tank is in communication with the first discharge port and is arranged below the glove box along the gravity direction, and the second negative pressure assembly is used for feeding inert gas into the buffer tank and controlling the buffer tank to maintain a negative pressure state.

6. The dosing device of claim 5, wherein, The feeding device further comprises a vibrating member arranged on the outer wall of the glove box.

7. The dosing device according to claim 5 or 6, wherein The feeding device further comprises a second filter arranged on the second negative pressure assembly, and the second filter is used for filtering dust entering the second negative pressure assembly.

8. A dosing device according to any one of claims 5-7, wherein The feeding device further comprises a weighing sensor arranged on the buffer tank, and the weighing sensor is used for measuring the total weight of the buffer tank and the material inside the buffer tank.

9. A dosing device according to any of claims 5-8, wherein The buffer tank is provided with a second discharge port, and the feeding device further comprises a stirring assembly and a third negative pressure assembly connected with each other, a feeding pipeline of the stirring assembly is in communication with the second discharge port, and the third negative pressure assembly is used for feeding gas into the stirring assembly and controlling the stirring assembly to maintain a negative pressure state.

10. The dosing device of claim 9, wherein, The feeding device further comprises a cleaning member, the cleaning member is movably arranged in the feeding pipeline of the stirring assembly and is used for removing residual material in the feeding pipeline.

11. A battery production equipment comprising the feeding device according to any one of claims 1-10.

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