Weighing device and battery production line

Abstract

The utility model relates to a weighing device and a battery production line, and the device comprises a first stock bin which is used for storing battery raw materials; a stock bin opening is formed in the bottom of the first stock bin; the weighing structure is used for weighing the first stock bin; the discharging pipe is provided with a first position and a second position; when the discharging pipe is located at the first position, a pipe opening of the discharging pipe is communicated with the stock bin opening. And when the discharging pipe is located at the second position, the pipe opening of the discharging pipe is separated from the stock bin opening. The weighing device and the battery production line provided by the embodiment of the utility model have the advantage of high weighing precision.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a weighing device and a battery production line. Background Art

[0002] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0003] During the production of batteries, the battery raw materials need to be weighed, and the weighing accuracy directly affects the production quality of the battery. However, the weighing devices currently used are often too low in accuracy to meet the production needs of power batteries. Utility Model Content

[0004] Based on this, it is necessary to provide a weighing device and a battery production line to address the problem of low precision of the weighing device.

[0005] A first aspect of an embodiment of the present application provides a weighing device, comprising: a first silo for storing battery raw materials; a silo opening at the bottom of the first silo; a weighing structure for weighing the first silo; and a discharge pipe, the discharge pipe having a first position and a second position; when the discharge pipe is in the first position, the pipe mouth of the discharge pipe is connected to the silo opening; when the discharge pipe is in the second position, the pipe mouth of the discharge pipe is separated from the silo opening.

[0006] By setting the discharge pipe to have a first position and a second position; when the discharge pipe is in the first position, the pipe mouth of the discharge pipe is connected with the silo opening, the battery raw materials in the first silo can be conveniently transferred at this time, so that the next weighing can be carried out, thereby improving production efficiency; when the discharge pipe is in the second position, the battery raw materials are input into the first silo again for weighing, and the pipe mouth of the discharge pipe is separated from the silo opening to disconnect, which can effectively prevent the discharge pipe's own gravity and the battery raw materials remaining in the discharge pipe from affecting the weighing of the first silo, thereby making the weighing device have high weighing accuracy, ensuring the stable production quality of the battery and meeting the production needs of power batteries.

[0007] In one embodiment, the weighing device includes a bracket, the first material bin is mounted on the bracket, and the weighing structure is disposed between the first material bin and the bracket. Thus, the first material bin is mounted on the bracket, and the weighing structure is precisely disposed between the first material bin and the bracket to ensure accurate measurement of the weight of the battery raw materials in the first material bin.

[0008] In one embodiment, the weighing device includes a fixed plate, a second carrier plate and a lifting drive; the second carrier plate is fixedly connected to the bracket; the lifting drive is supported between the fixed plate and the second carrier plate; the fixed plate is fixedly connected to the discharge pipe; the lifting drive can drive the fixed plate close to the second carrier plate to drive the discharge pipe to move to the second position; the lifting drive can drive the fixed plate away from the second carrier plate to drive the discharge pipe to move to the first position. In this way, when the lifting drive drives the fixed plate away from the second carrier plate, the discharge pipe moves to the first position, and the mouth of the discharge pipe is connected to the silo port. At this time, the battery raw materials in the first silo can be conveniently transferred, so that the next weighing can be carried out, thereby improving production efficiency; when the lifting drive is able to drive the fixed plate close to the second carrier plate, the discharge pipe moves to the second position, and the battery raw materials are input into the first silo again for weighing. By separating the mouth of the discharge pipe from the silo port, the self-gravity of the discharge pipe and the battery raw materials remaining in the discharge pipe can be effectively avoided from affecting the weighing of the first silo, thereby making the weighing device have high weighing accuracy, ensuring the stable production quality of the battery and meeting the production needs of power batteries.

[0009] In one embodiment, the weighing device includes a docking flange, and the docking flange is fixed to the fixed plate; when the discharge pipe is in the first position, the outlet of the discharge pipe is connected to the silo port through the docking flange. In this way, the connection between the first silo and the discharge pipe can be ensured to be stable, and the battery raw materials in the first silo can all enter the discharge pipe through the docking flange to achieve transfer, which is convenient and quick, and prevents leakage.

[0010] In one embodiment, the circumference of the silo opening is inwardly concave to form an annular groove, and the side of the docking flange facing the silo opening is outwardly convex to form an annular rib; when the discharge pipe is in the first position, the annular rib is engaged with the annular groove. In this way, the connection between the first silo and the discharge pipe can be ensured to be well sealed, thereby preventing leakage of battery raw materials during the transfer process.

[0011] In one embodiment, the weighing device includes a dust removal structure, and the dust removal structure is used to remove dust from the silo opening. By removing dust from the silo opening by the dust removal structure, it is possible to effectively prevent the battery raw materials remaining outside the silo opening from affecting the weighing of the first silo, thereby making the weighing device highly accurate, ensuring the stable production quality of the battery, and meeting the production requirements of power batteries.

[0012] In one of the embodiments, the weighing device includes an adsorption base and a negative pressure pump; an inverted conical hole and a plurality of adsorption holes are formed on the adsorption base, the plurality of adsorption holes are connected to the negative pressure pump, and all of the adsorption holes are formed with openings on the side walls of the inverted conical holes; the adsorption base is arranged on the fixed plate, and the docking flange is located at the bottom of the inverted conical hole; when the discharge pipe is in the first position, the silo opening is partially embedded in the inverted conical hole; when the discharge pipe is in the second position, the adsorption hole is used for dust removal and adsorption of the silo opening. In this way, by starting the negative pressure pump to perform dust removal and adsorption on the silo opening, it is possible to effectively avoid the residual battery raw materials on the outside of the silo opening from affecting the weighing of the first silo, thereby making the weighing device highly accurate, ensuring the stable production quality of the battery, and meeting the production requirements of power batteries.

[0013] In one embodiment, the weighing device includes a valve, and the valve is arranged in the first silo to control the opening and closing of the silo opening. Thus, the transportation and weighing of the battery raw materials can be controlled by opening or closing the valve.

[0014] In one embodiment, the weighing device includes a second silo, and the end of the discharge pipe away from the first silo is connected to the second silo. Thus, after the first silo is weighed, a certain amount of battery raw materials in the first silo can be transferred to the second silo.

[0015] In one embodiment, the discharge pipe is a telescopic hose.

[0016] In one embodiment, the weighing structure is a pressure sensor.

[0017] A second aspect of an embodiment of the present application provides a battery production line, comprising the above-mentioned weighing device.

[0018] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a weighing device provided for some embodiments of the present application, wherein the discharge pipe is in the second position.

[0020] Figure 2 A schematic structural diagram of a weighing device provided for some embodiments of the present application, wherein the discharge pipe is in a first position.

[0021] Figure 3 for Figure 1A magnified view of region A of the structure shown, where arrows represent the direction of gas flow.

[0022] Description of reference numerals:

[0023] The first silo-100, the silo opening-110, the support column-120, the annular groove-130, the weighing structure-200, the discharge pipe-300, the fixing plate-310, the second carrier plate-320, the lifting drive-330, the docking flange-340, the annular rib-350, the bracket-400, the first carrier plate-410, the dust removal structure-500, the adsorption base-510, the inverted cone hole-520, the adsorption hole-530, the valve-600, and the second silo-700. DETAILED DESCRIPTION

[0024] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0026] In the description of the embodiments of the present application, if the technical terms "first", "second", etc. appear, these terms are only used for descriptive purposes to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0029] In the description of the embodiments of the present application, if the term "multiple" appears, "multiple" means at least two (including two), such as two, three, etc., unless otherwise clearly and specifically defined. Similarly, if the term "multiple groups" appears, "multiple groups" refers to more than two groups (including two groups), and if the term "multiple sheets" appears, "multiple sheets" refers to more than two sheets (including two sheets).

[0030] In the description of the embodiments of the present application, if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0031] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, if the technical terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0032] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0034] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0035] In the related art, the component where electrochemical reactions occur in a battery cell is an electrode assembly. The electrode assembly is mainly formed by winding or stacking the positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly, and the parts of the positive and negative electrode sheets without active materials each constitute the tabs. The positive tab and the negative tab can be located together at one end of the main body or at both ends of the main body respectively. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop. In the production process of the battery, it is necessary to weigh the battery raw materials for preparing the positive active material and the negative active material. Since the amount of active material determines the performance of the battery cell, the weighing accuracy of the battery raw materials will directly affect the production quality of the battery during the production stage.

[0036] Since the weighing devices currently used often connect the discharge pipe and the silo together, the weight of the discharge pipe itself and the battery raw materials remaining in the discharge pipe will affect the weighing accuracy, resulting in low accuracy of the weighing device, which in turn affects the production quality of the battery and makes it difficult to meet the production needs of power batteries.

[0037] In order to alleviate the problem of low accuracy of the weighing device, the discharge pipe and the silo can be designed to be separable. When the silo is weighed, the discharge pipe can be separated from the silo, thereby avoiding the discharge pipe's own gravity and the residual battery raw materials in the discharge pipe from affecting the accuracy, thereby achieving high weighing accuracy.

[0038] Figure 1 A schematic structural diagram of a weighing device provided for some embodiments of the present application, wherein the discharge pipe is in the second position. Figure 2A schematic structural diagram of a weighing device provided for some embodiments of the present application, wherein the discharge pipe is in a first position. Figure 3 for Figure 1 Magnified view of region A of the structure shown.

[0039] A first aspect of an embodiment of the present application provides a weighing device, which can be used for but not limited to weighing battery raw materials of a battery.

[0040] See also Figures 1 to 3 As shown, the weighing device includes a first silo 100 , a weighing structure 200 and a discharge pipe 300 .

[0041] The first silo 100 can be used to store battery raw materials; the bottom of the first silo 100 has a silo opening 110; the weighing structure 200 is used to weigh the first silo 100. The discharge pipe 300 has a first position and a second position; when the discharge pipe 300 is in the first position, the pipe opening of the discharge pipe 300 is connected to the silo opening 110; when the discharge pipe 300 is in the second position, the pipe opening of the discharge pipe 300 is separated from the silo opening 110.

[0042] Among them, the first silo 100 is a container for storing battery raw materials. The first silo 100 can be of various shapes and sizes, such as a rectangular shell, a cylindrical shell, a hexagonal shell or a funnel-shaped shell; specifically, the shape and size of the first silo 100 can be determined according to production requirements, and this application does not limit this. The material of the first silo 100 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of this application do not impose special restrictions on this.

[0043] The weighing structure 200 is used to weigh the first silo 100. Specifically, the weighing structure 200 can be a pressure sensor, a spring dynamometer, etc. Taking the weighing structure 200 as a pressure sensor as an example, the weighing device can also include a display panel (not shown), through which the storage quality of the battery raw materials in the first silo 100 can be fed back, and the value can be directly displayed on the display panel.

[0044] The first silo 100 has a silo opening 110 at the bottom, and the discharge pipe 300 can be connected to the silo opening 110 to transfer the battery raw materials in the first silo 100 .

[0045] The weighing device of the embodiment of the present application has a first position and a second position by setting the discharge pipe 300; when the discharge pipe 300 is in the first position, the pipe mouth of the discharge pipe 300 is connected with the silo port 110, and the battery raw materials in the first silo 100 can be conveniently transferred at this time, so that the next weighing can be carried out to improve production efficiency; when the discharge pipe 300 is in the second position, the battery raw materials are input into the first silo 100 again for weighing, and the pipe mouth of the discharge pipe 300 is separated from the silo port 110 to disconnect, which can effectively prevent the self-gravity of the discharge pipe 300 and the battery raw materials remaining in the discharge pipe 300 from affecting the weighing of the first silo 100, thereby making the weighing device have high weighing accuracy, ensuring the stable production quality of the battery and meeting the production needs of power batteries.

[0046] Optionally, the discharge pipe 300 may be a telescopic hose, which may be generally made of a rubber tube or a corrugated tube.

[0047] In some possible embodiments, see Figures 1 to 3 As shown, the weighing device includes a bracket 400 , the first silo 100 is mounted on the bracket 400 , and the weighing structure 200 is disposed between the first silo 100 and the bracket 400 .

[0048] The bracket 400 can be made of high-strength stainless steel or carbon steel. The bracket 400 is a columnar structure as a whole. Each weighing device can include three, four or more brackets 400. Multiple brackets 400 are arranged at intervals to form a rectangular frame shape and jointly support the first silo 100. The bracket 400 and the first silo 100 can be firmly connected by welding and bolting.

[0049] Specifically, a first carrier plate 410 is disposed at the top of the support 400, a support column 120 is disposed at the edge of the first silo 100, the support column 120 is supported on the first carrier plate 410, and the weighing structure 200 is disposed between the support column 120 and the first carrier plate 410 of the support 400. In this way, the first silo 100 is mounted on the support 400, and the weighing structure 200 is precisely disposed between the first silo 100 and the support 400 to ensure accurate measurement of the weight of the battery raw materials in the first silo 100.

[0050] Optionally, the first carrier plate 410 may be a stainless steel plate or a carbon steel plate.

[0051] In some possible embodiments, see Figures 1 to 3 As shown, the weighing device includes a fixed plate 310 , a second carrier plate 320 and a lifting driver 330 ; the second carrier plate 320 is fixedly connected to the bracket 400 ; and the lifting driver 330 is supported between the fixed plate 310 and the second carrier plate 320 .

[0052] The fixed plate 310 is fixedly connected to the discharge pipe 300. The lifting driver 330 can drive the fixed plate 310 to approach the second carrier plate 320 to drive the discharge pipe 300 to move to the second position; the lifting driver 330 can drive the fixed plate 310 away from the second carrier plate 320 to drive the discharge pipe 300 to move to the first position.

[0053] The second carrier plate 320 may be a stainless steel plate or a carbon steel plate. The second carrier plate 320 is lower than the silo opening 110 and is fixedly connected to the middle of the bracket 400 by bolts or welding.

[0054] The lifting driver 330 is supported between the fixed plate 310 and the second carrier plate 320, and the lifting driver 330 can drive the fixed plate 310 to be close to or away from the second carrier plate 320; thereby, the nozzle of the discharge pipe 300 can be driven to move up and down along with the fixed plate 310; when the lifting driver 330 drives the fixed plate 310 away from the second carrier plate 320, the discharge pipe 300 moves to the first position, and the nozzle of the discharge pipe 300 is connected with the silo port 110, so that the battery raw materials in the first silo 100 can be conveniently transferred, so that the next weighing can be carried out, thereby improving production efficiency.

[0055] When the lifting drive 330 is able to drive the fixed plate 310 to approach the second carrier plate 320, the discharge pipe 300 moves to the second position, and the battery raw materials are input into the first silo 100 again for weighing. By separating the pipe mouth of the discharge pipe 300 from the silo mouth 110, the self-gravity of the discharge pipe 300 and the residual battery raw materials in the discharge pipe 300 can be effectively prevented from affecting the weighing of the first silo 100, thereby making the weighing device have high weighing accuracy, ensuring the stable production quality of the battery and meeting the production needs of power batteries.

[0056] Optionally, the lifting drive 330 is a cylinder;

[0057] In some possible embodiments, see Figures 1 to 3 As shown, the weighing device includes a docking flange 340, and the docking flange 340 is fixed on the fixing plate 310;

[0058] When the discharge pipe 300 is in the first position, the pipe opening of the discharge pipe 300 is connected to the silo port 110 through the docking flange 340. In this way, the connection between the first silo 100 and the discharge pipe 300 can be ensured to be stable, and the battery raw materials in the first silo 100 can all enter the discharge pipe 300 through the docking flange 340 to achieve transfer, which is convenient and quick to prevent leakage.

[0059] The docking flange 340 is always connected to the outlet of the discharge pipe 300. When the discharge pipe 300 is in the second position, the battery raw materials are input into the first silo 100 again for weighing. By separating the docking flange 340 from the silo opening 110, the self-gravity of the discharge pipe 300 and the residual battery raw materials in the discharge pipe 300 can be effectively prevented from affecting the weighing of the first silo 100, thereby making the weighing device have high weighing accuracy, ensuring the stable production quality of the battery and meeting the production requirements of power batteries.

[0060] Optionally, the docking flange 340 may be made of stainless steel, carbon steel, copper alloy or rubber.

[0061] In some possible embodiments, see Figures 1 to 3 As shown, the circumference of the silo opening 110 is inwardly recessed to form an annular groove 130, and the side of the docking flange 340 facing the silo opening 110 is outwardly protruding to form an annular rib 350. When the discharge pipe 300 is in the first position, the annular rib 350 is engaged with the annular groove 130.

[0062] In this way, when the discharge pipe 300 is in the first position, the pipe mouth of the discharge pipe 300 is connected to the silo port 110 through the docking flange 340, and is embedded and fixed in the annular rib 350 and the annular groove 130, which can ensure that the connection between the first silo 100 and the discharge pipe 300 is well sealed and avoid leakage of battery raw materials during the transfer process.

[0063] In some possible embodiments, see Figures 1 to 3 As shown, the weighing device includes a dust removal structure 500 , and the dust removal structure 500 is used to remove dust from the silo opening 110 .

[0064] Specifically, when the discharge pipe 300 is in the first position, the pipe opening of the discharge pipe 300 is connected to the silo opening 110 , and the dust removal structure 500 is suspended to avoid affecting the battery raw material transfer process in the first silo 100 .

[0065] When the discharge pipe 300 is in the second position, the pipe mouth of the discharge pipe 300 is separated from the silo port 110, and the battery raw materials are input into the first silo 100 again for weighing; the dust removal structure 500 is started to remove and adsorb the silo port 110, so that the battery raw materials remaining outside the silo port 110 can be effectively prevented from affecting the weighing of the first silo 100, thereby making the weighing device highly accurate, ensuring the stable production quality of the battery and meeting the production needs of power batteries.

[0066] In some possible embodiments, see Figures 1 to 3As shown, the weighing device includes an adsorption base 510 and a negative pressure pump (not marked); an inverted cone hole 520 and a plurality of adsorption holes 530 are formed on the adsorption base 510, the plurality of adsorption holes 530 are all connected to the negative pressure pump, and all the adsorption holes 530 are formed with openings on the side walls of the inverted cone hole 520.

[0067] The adsorption base 510 is set on the fixed plate 310, and the docking flange 340 is located at the bottom of the inverted cone hole 520; when the discharge pipe 300 is in the first position, the silo opening 110 of the first silo 100 is partially embedded in the inverted cone hole 520; when the discharge pipe 300 is in the second position, the adsorption hole 530 is used for dust removal and adsorption of the silo opening 110.

[0068] Among them, the material of the adsorption base 510 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this. The adsorption base 510 can be in various shapes, such as a simple three-dimensional structure such as a single rectangular parallelepiped or a cylinder or a sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as rectangular parallelepiped or a cylinder or a sphere, and the embodiment of the present application does not limit this. The adsorption base 510 is set on the fixed plate 310, and the connection method can be bolt connection, welding or clamping.

[0069] The plurality of adsorption holes 530 and the inverted cone hole 520 can be formed integrally by the adsorption base 510. Adjacent adsorption holes 530 can share an airway. One end of the plurality of adsorption holes 530 is connected to a negative pressure pump, and the other ends of all the adsorption holes 530 are respectively formed with openings on the side walls of the inverted cone hole 520, so as to facilitate dust removal and adsorption of the silo opening 110, so that the adsorption effect is good.

[0070] Specifically, when the discharge pipe 300 is in the first position, the pipe mouth of the discharge pipe 300 is connected to the silo port 110 through the docking flange 340, and the bottom portion of the first silo 100 is embedded in the inverted cone hole 520 to reduce the mixing of impurities; the negative pressure pump is paused to avoid affecting the battery raw material transfer process in the first silo 100.

[0071] When the discharge pipe 300 is in the second position, the docking flange 340 is separated from the silo port 110, so that the pipe mouth of the discharge pipe 300 and the silo port 110 are no longer connected. At this time, battery raw materials can be input into the first silo 100 again for weighing; the negative pressure pump is started to remove dust and adsorb the silo port 110. In this way, the battery raw materials remaining outside the silo port 110 can be effectively prevented from affecting the weighing of the first silo 100, thereby making the weighing device highly accurate, ensuring the stable production quality of the battery and meeting the production needs of power batteries.

[0072] Optionally, the bottom of the first silo 100 may be designed as a funnel-shaped structure that matches the inverted cone hole 520 to reduce the mixing of impurities.

[0073] In some possible embodiments, see Figures 1 to 3 As shown, the weighing device includes a valve 600 , which is disposed in the first silo 100 to control the opening and closing of the silo port 110 .

[0074] The valve 600 may be an electric valve, a rotary valve or a gate valve, the specific design being subject to the specific design, and the embodiment of the present application is not limited to this.

[0075] By opening or closing the valve 600, the delivery and weighing of the battery raw materials can be controlled.

[0076] Specifically, when the discharge pipe 300 is in the first position, the pipe mouth of the discharge pipe 300 is connected to the silo port 110, and the valve 600 is opened, so that the pipe mouth of the discharge pipe 300 is connected to the silo port 110, and finally the battery raw materials in the first silo 100 can be transferred outward through the silo port 110 and the discharge pipe 300 in sequence.

[0077] When the discharge pipe 300 is in the second position, the pipe mouth of the discharge pipe 300 is disconnected from the silo opening 110, and the valve 600 is closed, so that the silo opening 110 at the bottom of the first silo 100 is closed, and the first silo 100 is formed into a semi-closed cavity, which can be used to accommodate battery raw materials; when battery raw materials are input into the first silo 100 again for weighing, the self-gravity of the discharge pipe 300 and the residual battery raw materials in the discharge pipe 300 can be effectively avoided to affect the weighing of the first silo 100, thereby making the weighing device have high weighing accuracy, ensuring the stable production quality of the battery and meeting the production needs of power batteries.

[0078] In some possible embodiments, see Figures 1 to 3 As shown, the weighing device includes a second silo 700 , and one end of the discharge pipe 300 away from the first silo 100 is connected to the second silo 700 .

[0079] The second silo 700 is a container for storing battery raw materials. The second silo 700100 can be of various shapes and sizes, such as a rectangular shell, a cylindrical shell, a hexagonal shell, a funnel-shaped shell, or other irregularly shaped shells; specifically, the shape and size of the second silo 700 can be determined according to production requirements, and this application does not limit this. The material of the second silo 700 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this embodiment of the application does not impose any special restrictions on this.

[0080] After weighing, the first silo 100 can transfer a certain amount of battery raw materials therein to the second silo 700. Specifically, when the discharge pipe 300 is in the first position, the mouth of the discharge pipe 300 is connected with the silo port 110, and the battery raw materials in the first silo 100 pass through the silo port 110 and the discharge pipe 300, and can finally be transferred and stored in the second silo 700, thereby finally realizing the material transfer of the battery raw materials.

[0081] The second aspect of the embodiment of the present application provides a battery production line, comprising the above-mentioned weighing device. The weighing device can be used to weigh and transfer battery raw materials such as positive electrode active materials and negative electrode active materials to achieve large-scale production of batteries.

[0082] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A weighing device, characterized in that: The weighing device comprises: A first material bin (100) is used to store battery raw materials; the bottom of the first material bin (100) is provided with a material bin opening (110); A weighing structure (200) for weighing the first silo (100); and a discharge pipe (300), wherein the discharge pipe (300) has a first position and a second position; When the discharge pipe (300) is in the first position, the pipe opening of the discharge pipe (300) is in communication with the silo opening (110); When the discharge pipe (300) is in the second position, the pipe opening of the discharge pipe (300) is separated from the silo opening (110).

2. The weighing device according to claim 1, characterized in that: The weighing device comprises a bracket (400), the first material bin (100) is mounted on the bracket (400), and the weighing structure (200) is arranged between the first material bin (100) and the bracket (400).

3. The weighing device according to claim 2, characterized in that: The weighing device comprises a fixed plate (310), a second carrier plate (320) and a lifting driver (330); the second carrier plate (320) is fixedly connected to the bracket (400); the lifting driver (330) is supported between the fixed plate (310) and the second carrier plate (320); The fixed plate (310) is fixedly connected to the discharge pipe (300); The lifting driver (330) is capable of driving the fixed plate (310) to approach the second carrier plate (320) so as to drive the discharge pipe (300) to move to the second position; The lifting drive (330) is capable of driving the fixed plate (310) away from the second carrier plate (320) to drive the discharge pipe (300) to move to the first position.

4. The weighing device according to claim 3, characterized in that: The weighing device comprises a docking flange (340), and the docking flange (340) is fixed on the fixing plate (310); When the discharge pipe (300) is in the first position, the pipe opening of the discharge pipe (300) is in communication with the silo opening (110) via the docking flange (340).

5. The weighing device according to claim 4, characterized in that: The circumferential side of the silo opening (110) is inwardly recessed to form an annular groove (130), and the side of the docking flange (340) facing the silo opening (110) is outwardly protruding to form an annular convex rib (350); When the discharge pipe (300) is in the first position, the annular rib (350) is engaged with the annular groove (130).

6. The weighing device according to any one of claims 1 to 5, characterized in that: The weighing device comprises a dust removal structure (500), and the dust removal structure (500) is used to remove dust from the silo opening (110).

7. The weighing device according to claim 4, characterized in that: The weighing device comprises an adsorption base (510) and a negative pressure pump; an inverted cone-shaped hole (520) and a plurality of adsorption holes (530) are formed on the adsorption base (510); the plurality of adsorption holes (530) are all connected to the negative pressure pump, and all the adsorption holes (530) are formed with openings on the side walls of the inverted cone-shaped hole (520); The adsorption base (510) is arranged on the fixing plate (310), and the docking flange (340) is located at the bottom of the inverted tapered hole (520); When the discharge pipe (300) is in the first position, the silo opening (110) is partially embedded in the inverted tapered hole (520); When the discharge pipe (300) is in the second position, the adsorption hole (530) is used to perform dust removal and adsorption on the silo opening (110).

8. The weighing device according to any one of claims 1 to 5, characterized in that: The weighing device comprises a valve (600), and the valve (600) is arranged in the first silo (100) to control the opening and closing of the silo port (110).

9. The weighing device according to any one of claims 1 to 5, characterized in that: The weighing device comprises a second silo (700), and one end of the discharge pipe (300) away from the first silo (100) is in communication with the second silo (700).

10. The weighing device according to any one of claims 1 to 5, characterized in that: The discharge pipe (300) is a telescopic hose.

11. The weighing device according to any one of claims 1 to 5, characterized in that: The weighing structure (200) is a pressure sensor.

12. A battery production line, characterized in that: Comprising a weighing device as claimed in any one of claims 1 to 11.

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