Battery cell baking equipment

Abstract

The invention discloses battery cell baking equipment, and relates to the technical field of lithium ion battery production, the battery cell baking equipment comprises a box body, a heating mechanism and a heat preservation mechanism, the box body is provided with a sealing cavity and a transportation flow channel, the transportation flow channel is provided with a heating position and a heat preservation position, the heating mechanism comprises a heating pressing assembly and a heating jacking assembly, the two heating jacking assemblies are arranged on the two sides of the heating position respectively, each heating jacking assembly is provided with a jacking plane, each heating pressing assembly is provided with a first electromagnetic coil, and the first electromagnetic coils are electrified to generate a first alternating magnetic field; the heat preservation mechanism is arranged at the heat preservation position of the box and used for preserving heat and discharging water vapor. During working, the jacking assembly drives the jacking plane to protrude out of the conveying flow channel, so that the battery cell leaves the conveying flow channel, and the heating and pressing assembly synchronously presses the battery cell for electromagnetic heating. The technical scheme provided by the invention aims to solve the problems of long baking time and high production cost of the battery cell.

Description

Technical Field

[0001] The invention relates to the technical field of lithium ion battery production, and in particular to a battery core baking device. Background Art

[0002] In the production process of lithium-ion batteries, if there is water in the battery cell, the lithium ions in the battery cell react with water to generate gas, which will cause problems such as increased pressure inside the battery cell and reduced effective capacity, thus affecting the performance and safety of the battery cell. Therefore, it is necessary to use battery cell baking equipment to evaporate the water inside the battery cell to a safe range.

[0003] At present, the baking methods used in battery cell baking equipment mainly include heating tube cavity overall heating baking or hot press contact baking. The heating tube cavity overall heating baking is to place the battery cell in the baking chamber, and use the heating system to heat the baking chamber as a whole, and use radiation heating and convection heating to heat the battery cell. Hot press contact baking is to heat the battery cell by heating the contact plate so that the battery cell contacts the contact plate and heats the battery cell by conduction.

[0004] Although the existing battery cell baking equipment can evaporate and remove the water in the battery cell, there are still some problems. The baking time of the heating tube cavity is relatively long, generally taking several hours to complete the baking, the baking cycle is long, and the production efficiency is low. Although the hot press contact baking is more efficient than the heating tube baking equipment, it still takes a long time, resulting in low efficiency of the baking process, high energy consumption, and high production costs. Summary of the invention

[0005] The main purpose of the present invention is to provide a battery cell baking device, aiming to solve the problems of long battery cell baking time and high production cost.

[0006] To achieve the above object, the present invention provides a battery cell baking device, the battery cell baking device comprising:

[0007] A box body, the box body is provided with a sealed cavity and a transport channel located in the sealed cavity for transporting the battery cells, the transport channel is sequentially provided with a heating position and a heat preservation position along a transport direction;

[0008] A heating mechanism, the heating mechanism comprising a heating pressing assembly and a heating lifting assembly provided on the box body, the heating pressing assembly and the heating lifting assembly are respectively provided on opposite sides of the heating position, the heating lifting assembly is provided with a lifting plane, the heating pressing assembly is provided with a first electromagnetic coil, and the first electromagnetic coil is used to generate a first alternating magnetic field; and

[0009] A heat preservation mechanism, which is disposed in the box and corresponds to the heat preservation position, and is used to keep the battery cell at the heat preservation position warm and discharge water vapor;

[0010] Among them, the heating lifting component drives the lifting plane to protrude from the transport channel so that the battery cell at the heating position leaves the transport channel, and the heating pressing component drives the first electromagnetic coil to approach the battery cell on the lifting plane to heat the battery cell.

[0011] In one embodiment, the heating and pressing assembly comprises:

[0012] A drive assembly, the drive assembly being disposed on the housing; and

[0013] A heating plate, the heating plate is connected to the output end of the driving assembly, and the heating plate is provided with the first electromagnetic coil;

[0014] The driving component drives the heating plate to drive the first electromagnetic coil to approach or move away from the lifting plane.

[0015] In one embodiment, the box body is formed with a first driving hole corresponding to the heating position, and the driving assembly includes:

[0016] a second sealing cylinder, one end of which is fixed to the box body and communicated with the first driving hole, and the second sealing cylinder is provided with a downward pressure transmission chamber; and

[0017] A first driving member, the first driving member is arranged in the box body, an output end of the first driving member is provided with a first transmission shaft, one end of the first transmission shaft is passed through the downward pressure transmission cavity, and is connected to the heating plate through the first driving hole;

[0018] The first driving member drives the first transmission shaft to move along the downward pressure transmission cavity to drive the heating plate and the first electromagnetic coil to approach or move away from the lifting plane.

[0019] In one embodiment, the box body is further formed with a first guide hole, the first guide hole is arranged adjacent to the first drive hole, the heating and pressing assembly further comprises a first sealing cylinder, the first sealing cylinder is arranged on the box body and corresponds to the first guide hole to block the first guide hole, and the first sealing cylinder is formed with a sealing activity cavity communicated with the first guide hole;

[0020] A first guide rod is provided on the side of the heating plate facing away from the lifting plane, and one end of the first guide rod movably passes through the first guide hole and extends into the sealed movable cavity.

[0021] In one embodiment, the box body is formed with a second driving hole corresponding to the heating position, and the heating lifting assembly includes a third sealing cylinder, a second driving member and a lifting plate;

[0022] One end of the third sealing cylinder is fixed to the box body and communicated with the second driving hole, and the third sealing cylinder is provided with a lifting transmission chamber;

[0023] The second driving member is arranged on the box body, and a second transmission shaft is arranged on the output end of the second driving member, one end of the second transmission shaft is passed through the lifting transmission cavity, and is connected to the lifting plate through the second driving hole;

[0024] The jacking plate is provided with the jacking plane;

[0025] The second driving member drives the second transmission shaft to move along the lifting transmission cavity, driving the lifting plate to move, so that the battery cell leaves the transport channel.

[0026] In one embodiment, the lifting plate is provided with a second electromagnetic coil, and the second electromagnetic coil is used to generate a second alternating magnetic field to heat the battery core.

[0027] In one embodiment, the heat preservation mechanism further includes an exhaust component, which is disposed on the box body and corresponds to the heat preservation position, and is used to exhaust water vapor;

[0028] The box body is also formed with an air inlet and an air outlet, both of which correspond to the insulation position, and the exhaust component is connected to the air inlet and the air outlet respectively. The exhaust component transports dry inert gas to the sealed cavity through the air inlet and discharges the inert gas with water vapor through the air outlet.

[0029] In one embodiment, the box body is provided with two openings communicating with the sealed cavity, and the battery cell baking device further comprises two sealed doors, which are movably arranged at the two openings respectively, and the sealed doors comprise:

[0030] A hinge assembly, the hinge assembly comprising a base plate, a rotating plate and an adjusting member, one end of the base plate being adjustably mounted on the box body through the adjusting member, and the other end of the base plate being rotatably connected to the rotating plate through a pin shaft;

[0031] a sealing plate, one end of which is connected to the rotating plate; and

[0032] A locking member is arranged on the box body and is used to press the other end of the sealing plate away from the base plate to the opening.

[0033] In one embodiment, the box is further provided with a transport assembly for transporting the battery cell, and the transport assembly includes:

[0034] A plurality of transport wheels, wherein the plurality of transport wheels are arranged on opposite sides of the sealing cavity along a first direction, and the transport flow channel is formed on the surface of the transport wheels;

[0035] A plurality of transmission groups, wherein the plurality of transmission groups are arranged on the box body along the first direction, each of the transmission groups comprises two transmission wheels and a transport transmission shaft, two ends of the transport transmission shaft respectively pass through two opposite transport wheels and protrude from the box body, and the two transmission wheels are respectively arranged at two ends of the transport transmission shaft and located on a side of the box body away from the transport wheels;

[0036] A driving wheel group, the driving wheel group comprising a transport driving member and a driving shaft, the transport driving member is arranged on a side of the box away from the transport wheel, one end of the driving shaft is connected to the output end of the transport driving member, and the other end passes through two opposite transport wheels and protrudes from the other side of the box, and the driving shaft is provided with a transmission wheel at one end away from the transport driving member; and

[0037] A plurality of transmission belts are respectively tensioned on two adjacent transmission wheels on the same side.

[0038] In one embodiment, the transport flow channel is also formed with a cooling position, and the cooling position is located on a side of the heat preservation position away from the heating position. The battery cell baking equipment also includes a cooling mechanism, and the cooling mechanism is arranged on the box body and corresponds to the cooling position. The cooling mechanism is used to cool the battery cell located at the cooling position.

[0039] The technical solution of the present invention uses a transport channel to allow the battery cells to pass through a heating position and a heat-keeping position in sequence to complete the drying of moisture. In the heating position, the heating mechanism can drive the first electromagnetic coil to move so that the first electromagnetic coil presses against the battery cell, and the first electromagnetic coil is used to generate a first alternating magnetic field to heat and dry the battery cell. In the heat-keeping position, the heat-keeping mechanism maintains the battery cell within a preset temperature range and discharges water vapor. In this way, the battery cell is baked through the principle of electromagnetic induction heating, and the drying process can be quickly realized, which reduces the production cycle and improves efficiency. In addition, the energy consumption during the electromagnetic induction heating process is small, which reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0041] Figure 1 A schematic structural diagram of an embodiment of a battery cell baking device provided by the present invention;

[0042] Figure 2 for Figure 1 A structural diagram of the medium cell baking equipment from another perspective;

[0043] Figure 3 for Figure 1 The structural diagram of the middle box;

[0044] Figure 4 for Figure 1 A schematic diagram of the structure of the heating mechanism;

[0045] Figure 5 for Figure 4 A structural schematic diagram of the heating mechanism from another perspective;

[0046] Figure 6 for Figure 5 Schematic diagram of the structure of the AA section;

[0047] Figure 7 for Figure 4 The structural diagram of the middle heating plate;

[0048] Figure 8 for Figure 4 Structural schematic diagram of the middle lifting plate;

[0049] Fig. 9 for Figure 1 Schematic diagram of the structure of the middle sealing door;

[0050] Fig.10 for Fig. 9 A schematic diagram of the structure of the central sealing door from another perspective.

[0051] Description of Figure Numbers:

[0052] 100. Cell baking equipment; 1. Box; 11. Opening; 12. Sealed cavity; 13. Threaded hole; 14. First guide hole; 141. First flange; 142. First sealing cylinder; 143. Sealed movable cavity; 15. First drive hole; 16. Air inlet; 17. Air outlet; 18. Transport channel; 19. Second drive hole; 2. Heating mechanism; 21. Heating and pressing assembly; 211. Driving assembly; 2110. Second Flange; 2111, first driving member; 2112, first transmission shaft; 2113, second sealing cylinder; 2114, downward pressure transmission cavity; 2115, first guide rod; 2116, linear bearing; 2117, first mounting seat; 2118, mounting bottom plate; 2119, wire rod; 212, heating plate; 2121, first plate body; 2122, second plate body; 2123, mounting cavity; 2124, first electromagnetic coil; 2 2. Heating and lifting assembly; 221. Second driving member; 222. Second transmission shaft; 223. Second guide rod; 224. Lifting plate; 2241. Second electromagnetic coil; 2242. Mounting groove; 2243. Mounting block; 2244. Lifting plane; 225. Third sealing cylinder; 226. Lifting transmission chamber; 3. Insulation mechanism; 4. Cooling mechanism; 5. Sealed door; 51. Hinge assembly; 510. Connecting plate; 511. Base Plate; 5111, movable hole; 5112, first lug; 512, rotating plate; 5121, second lug; 513, pin shaft; 52, sealing plate; 53, locking member; 531, mounting portion; 532, rotating portion; 54, sealing ring; 6, transport component; 61, transport wheel; 62, transmission group; 621, transmission wheel; 622, transport drive shaft; 63, driving wheel group; 631, transport drive member; 632, driving shaft.

[0053] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0056] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0057] In the production process of lithium-ion batteries, if there is water in the battery cell, the lithium ions in the battery cell react with water to generate gas, which will cause problems such as increased pressure inside the battery cell and reduced effective capacity, thus affecting the performance and safety of the battery cell. Therefore, it is necessary to use battery cell baking equipment to evaporate the water inside the battery cell to a safe range.

[0058] At present, the baking methods used in battery cell baking equipment mainly include heating tube cavity overall heating baking or hot press contact baking. The heating tube cavity overall heating baking is to place the battery cell in the baking chamber, and use the heating system to heat the baking chamber as a whole, and use radiation heating and convection heating to heat the battery cell. Hot press contact baking is to heat the battery cell by heating the contact plate so that the battery cell contacts the contact plate and heats the battery cell by conduction.

[0059] Although the existing battery cell baking equipment can evaporate and remove the water in the battery cell, there are still some problems. The baking time of the heating tube cavity is relatively long, generally taking several hours to complete the baking, the baking cycle is long, and the production efficiency is low. Although the hot press contact baking is more efficient than the heating tube baking equipment, it still takes a long time, resulting in low efficiency of the baking process, high energy consumption, and high production costs.

[0060] The present invention provides a battery cell baking device 100, aiming to solve the problems of long battery cell baking time and high production cost.

[0061] See also Figures 1 to 10In one embodiment of the present invention, the battery cell baking device 100 includes a box body 1, a heating mechanism 2 and a heat preservation mechanism 3. The box body 1 is provided with a sealed cavity 12 and a transport channel 18 for transporting the battery cells in the sealed cavity 12. The transport channel 18 is sequentially formed with a heating position and a heat preservation position along the transport direction. The heating mechanism 2 includes a heating down-pressing assembly 21 and a heating lifting assembly 22 provided in the box body 1. The heating down-pressing assembly 21 and the heating lifting assembly 22 are respectively provided on opposite sides of the heating position. The heating lifting assembly 22 is provided with a lifting plane 2244. The heating down-pressing assembly 21 is provided with a first electromagnetic coil 2124. The first electromagnetic coil 2124 is used to generate a first alternating magnetic field. The heat preservation mechanism 3 is provided in the box body 1 and corresponds to the heat preservation position. The heat preservation mechanism 3 is used to keep the battery cells at the heat preservation position warm and discharge water vapor. The heating lifting component 22 drives the lifting plane 2244 to protrude out of the transport channel 18 so that the battery cell at the heating position leaves the transport channel 18, and the heating pressing component 21 drives the first electromagnetic coil 2124 to approach the battery cell of the lifting plane 2244 to heat the battery cell.

[0062] In the present embodiment, the battery cell baking device 100 uses the transport channel 18 to make the battery cell pass through the heating position and the heat-keeping position in sequence to complete the drying of moisture. In the heating position, the heating mechanism 2 can drive the first electromagnetic coil 2124 to move, so that the first electromagnetic coil 2124 presses against the battery cell, and the first electromagnetic coil 2124 is used to generate a first alternating magnetic field to heat and dry the battery cell. In the heat-keeping position, the heat-keeping mechanism 3 maintains the battery cell within a preset temperature range and discharges water vapor. In this way, the battery cell is baked through the principle of electromagnetic induction heating, which can quickly realize the drying process, reduce the production cycle, improve efficiency, and the energy consumption during the electromagnetic induction heating process is small, which reduces the production cost.

[0063] It can be understood that the lifting plane 2244 first lifts the battery cell from the transport channel 18 to create a certain gap between the battery cell and the transport channel 18, and then the heated pressing assembly 21 moves relative to the lifting plane 2244, thereby avoiding the heated pressing assembly 21 from affecting the transport channel 18 when pressing the battery cell.

[0064] It should be noted that, in order to improve the quality of the battery cells during baking, the sealed cavity 12 formed by the box body 1 is a vacuum environment.

[0065] See also Figure 3 and Figure 4 In one embodiment, the heating and pressing assembly 21 includes a driving assembly 211 and a heating plate 212. The driving assembly 211 is disposed in the box 1. The heating plate 212 is connected to the output end of the driving assembly 211, and the heating plate 212 is provided with a first electromagnetic coil 2124. The driving assembly 211 drives the heating plate 212 to drive the first electromagnetic coil 2124 to approach or move away from the lifting plane 2244.

[0066] In this embodiment, the driving component 211 is arranged in the box body 1, and the driving component 211 drives the heating plate 212 to move relative to the lifting plane 2244 to get closer to or away from the battery cell, wherein the heating plate 212 is provided with a first electromagnetic coil 2124, and the first electromagnetic coil 2124 generates a first alternating magnetic field when energized, and the first alternating magnetic field cuts the battery cell, thereby converting electrical energy into thermal energy, thereby realizing rapid heating and drying of the battery cell.

[0067] See also Figure 4 and Figure 7 In one embodiment, the heating plate 212 includes a first plate body 2121 and a second plate body 2122 connected to each other, an installation cavity 2123 is formed between the first plate body 2121 and the second plate body 2122, and the first electromagnetic coil 2124 is laid in the installation cavity 2123, and the first electromagnetic coil 2124 is parallel to the lifting plane 2244.

[0068] In this embodiment, in order to prevent the first electromagnetic coil 2124 from being directly pressed, the heating plate 212 is provided with a first plate body 2121 and a second plate body 2122 which are connected to each other, and the first electromagnetic coil 2124 is placed between the first plate body 2121 and the second plate body 2122, wherein the first plate body 2121 and the second plate body 2122 can be made of materials with excellent insulation properties to reduce the influence on electromagnetic induction, such as insulating ceramics.

[0069] It can be understood that the first electromagnetic coil 2124 is laid in the installation cavity 2123. The first electromagnetic coil 2124 is firstly surrounded to form a circle, which can be circular, elliptical or rectangular, and then placed in the installation cavity 2123.

[0070] Optionally, a first cooling component is further provided in the installation cavity 2123, and the first cooling component is used to reduce the operating temperature of the first electromagnetic coil 2124, so that the temperature of the first electromagnetic coil 2124 can be within a preset safety range, which can not only effectively prevent the first electromagnetic coil 2124 from having performance degradation or shortened life due to excessive temperature, but also improve the stability and reliability of the heating process. The first cooling component can cool the first electromagnetic coil 2124 by using a circulating cooling pipe filled with coolant.

[0071] See also Figure 3 and Figure 4In one embodiment, the housing 1 is formed with a first driving hole 15 corresponding to the heating position, and the driving assembly 211 includes a second sealing cylinder 2113 and a first driving member 2111. One end of the second sealing cylinder 2113 is fixed to the housing 1 and communicated with the first driving hole 15, and the second sealing cylinder 2113 is provided with a downward pressure transmission chamber 2114. The first driving member 2111 is arranged on the housing 1, and the output end of the first driving member 2111 is provided with a first transmission shaft 2112, one end of the first transmission shaft 2112 is penetrated through the downward pressure transmission chamber 2114, and is connected to the heating plate 212 through the first driving hole 15. Among them, the first driving member 2111 drives the first transmission shaft 2112 to move along the downward pressure transmission chamber 2114, so as to drive the heating plate 212 and the first electromagnetic coil 2124 to approach or move away from the lifting plane 2244.

[0072] In this embodiment, one end of the second sealing cylinder 2113 is fixed to the housing 1 and corresponds to the first driving hole 15, forming a downward pressure transmission chamber 2114 communicating with the first driving hole 15, the first driving member 2111 is mounted on the first mounting seat 2117, and the first transmission shaft 2112 of the first driving member 2111 passes through the downward pressure transmission chamber 2114 and the first driving hole 15, extends into the sealing chamber 12, and is connected to the heating plate 212. The downward pressure transmission chamber 2114 can effectively prevent the first transmission shaft 2112 from leaking gas during movement, thereby destroying the vacuum environment of the sealing chamber 12. Among them, the first driving member 2111 may be an electric motor, a pneumatic cylinder or a hydraulic cylinder.

[0073] It can be understood that when the first driving member 2111 drives the first transmission shaft 2112 to move, the output end of the first driving member 2111 will also move relative to the downward pressure transmission chamber 2114. In order to ensure the gas sealing of the connection, the conventional practice is to set the first driving member 2111 in the downward pressure transmission chamber 2114 and use the second sealing tube 2113 to completely cover the first driving member 2111. However, this will cause the volume of the second sealing tube 2113 to be larger.

[0074] See also Figures 4 to 6 In order to solve the above problem, in one embodiment, the output end of the first driving member 2111 is connected to the second sealing tube 2113 through the second flange 2110, the second sealing tube 2113 is a bellows, and the first driving member 2111 drives the bellows to compress or extend.

[0075] It can be understood that the second sealing tube 2113 is a bellows, and the end of the bellows away from the first driving hole 15 is connected to the output end of the first driving member 2111 through the second flange 2110, so that when the first driving member 2111 drives the first transmission shaft 2112 to move, the bellows will be compressed or extended at the same time, so that the downward pressure transmission chamber 2114 will become shorter or longer accordingly. The first driving member 2111 will seal one end of the downward pressure transmission chamber 2114, thereby solving the airtightness problem.

[0076] See also Figures 4 to 6 In one embodiment, the housing 1 is further formed with a first guide hole 14, which is arranged adjacent to the first driving hole 15. The heating and pressing assembly 21 further comprises a first sealing cylinder 142, which is arranged on the housing 1 and corresponds to the first guide hole 14 to block the first guide hole 14. The first sealing cylinder 142 is formed with a sealing movable cavity 143 connected to the first guide hole 14. A first guide rod 2115 is provided on the side of the heating plate 212 facing away from the lifting plane 2244, and one end of the first guide rod 2115 movably passes through the first guide hole 14 and extends into the sealing movable cavity 143.

[0077] In this embodiment, in order to ensure the stability of the heating plate 212 when it moves, a first guide rod 2115 is further provided. When the first driving member 2111 drives the first transmission shaft 2112 to drive the heating plate 212 to move, since only one shaft is connected to the heating plate 212, the heating plate 212 is prone to shaking during the movement. Therefore, the first guide rod 2115 is additionally provided to assist the movement of the heating plate 212, thereby ensuring the stability of the heating plate 212 when it moves.

[0078] See also Figures 4 to 6 At the same time, since the first guide rod 2115 is movably arranged in the first guide hole 14, when the heating plate 212 moves, the first guide rod 2115 will also move along the first guide hole 14, thereby affecting the vacuum environment of the sealed cavity 12. Therefore, a first sealing cylinder 142 is provided on the first guide hole 14 to block the first guide hole 14. The first sealing cylinder 142 forms a sealed movable cavity 143 connected to the first guide hole 14, and the first guide rod 2115 can move in the sealed movable cavity 143.

[0079] See also Figures 4 to 6 In one embodiment, the first sealing cylinder 142 is installed in the first guide hole 14 through the first flange 141 .

[0080] In this embodiment, the first sealing cylinder 142 is installed in the first guide hole 14 through the first flange 141 , thereby ensuring that the first sealing cylinder 142 can be firmly connected to the box body 1 and the vacuum environment of the sealing chamber 12 is guaranteed.

[0081] It is understandable that if the first guide rod 2115 is directly disposed on the inner ring of the first flange 141, a certain gap must be left between the first guide rod 2115 and the inner ring of the first flange 141 to enable the first guide rod 2115 to move. However, when there is a gap, since there is no limit in the circumferential direction of the first guide, the first guide rod 2115 is prone to shaking when moving along the axial direction, which still causes the heating plate 212 to shake.

[0082] See also Figures 4 to 6 In order to solve the above problem, in one embodiment, a linear bearing 2116 is provided in the sealed movable cavity 143, the linear bearing 2116 is installed on the first flange 141, and is coaxially arranged with the first flange 141, and the first guide rod 2115 is movably inserted into the inner ring of the linear bearing 2116.

[0083] It can be understood that a linear bearing 2116 is provided on the inner ring of the first flange 141, and the first guide rod 2115 is movably inserted into the inner ring of the linear bearing 2116. The limiting effect of the linear bearing 2116 can prevent the first guide rod 2115 from shaking.

[0084] In one embodiment, the linear bearing 2116 is made of ceramic.

[0085] Optionally, the linear bearing 2116 is made of ceramic material due to its wear resistance and high temperature stability.

[0086] In one embodiment, a sealing ring is provided at the connection of the first flange 141 .

[0087] Optionally, a sealing ring is provided at the connection of the first flange 141 to improve the sealing performance and ensure the vacuum environment of the sealed cavity 12. The sealing ring may be made of rubber, silicone or the like.

[0088] In one embodiment, the heating and pressing assembly 21 further includes a mounting base plate 2118 and a wire rod 2119, and a first transmission shaft 2112 is provided at the output end of the first driving member 2111, and the first transmission shaft 2112 is connected to one side of the mounting base plate 2118. One end of the wire rod 2119 is connected to the mounting base plate 2118, and the other end is connected to the heating plate 212. The first driving member 2111 drives the first transmission shaft 2112, driving the mounting base plate 2118 and the wire rod 2119, so that the heating plate 212 is close to the battery cell.

[0089] In this embodiment, the heating and pressing assembly 21 further includes a mounting base plate 2118 and a wire rod 2119. The mounting base plate 2118 serves as a support and transmission structure of the heating and pressing assembly 21, and can not only withstand the power from the first transmission shaft 2112, but also transmit the power to the heating plate 212 through the wire rod 2119, so that the heating plate 212 moves relative to the lifting plane 2244. The wire rod 2119 is provided with wires inside, and the wires are connected to the first electromagnetic coil 2124 to generate an alternating current, so that the first electromagnetic coil 2124 heats the battery cell.

[0090] See also Figure 3 and Figure 4 In one embodiment, a plurality of first guide holes 14 are provided, and the plurality of first guide holes 14 are arranged around the first driving hole 15. A plurality of first guide rods 2115 are also provided, and each first guide rod 2115 corresponds to a first guide hole 14. The plurality of first guide rods 2115 are arranged on the mounting base plate 2118 and surround the first transmission shaft 2112.

[0091] In this embodiment, there are four first guide holes 14 distributed in a cross shape, and the first driving hole 15 is located at the center of the four first guide holes 14. Each guide hole is provided with a first guide rod 2115. The first guide shaft is installed on the mounting base 2118 and surrounds the first transmission shaft 2112, thereby ensuring that the heating plate 212 can move stably.

[0092] In one embodiment, a plurality of wire-passing rods 2119 are provided, and a plurality of heating plates 212 are also provided, and each wire-passing rod 2119 corresponds to a heating plate 212 .

[0093] In this embodiment, in order to further improve the working efficiency, a plurality of wire passing rods 2119 and heating plates 212 are provided correspondingly, and each heating plate 212 can heat the battery cell.

[0094] In one embodiment, the housing 1 is formed with a second drive hole 19 corresponding to the heating position, and the heating lifting assembly 22 includes a third sealing cylinder 225, a second driving member 221 and a lifting plate 224. One end of the third sealing cylinder 225 is fixed to the housing 1 and communicated with the second driving hole 19, and the third sealing cylinder 225 is provided with a lifting transmission cavity 226. The second driving member 221 is provided in the housing 1, and a second transmission shaft 222 is provided at the output end of the second driving member 221. One end of the second transmission shaft 222 is passed through the lifting transmission cavity 226 and connected to the lifting plate 224 through the second driving hole 19. The lifting plate 224 is provided with a lifting plane 2244. Among them, the second driving member 221 drives the second transmission shaft 222 to move along the lifting transmission cavity 226, driving the lifting plate 224 to move, so that the battery cell leaves the transport channel 18.

[0095] In this embodiment, the heating lifting assembly 22 drives the lifting plate 224 to move through the second driving member 221, so that the battery cell leaves the transport channel 18. Among them, the structure of the third sealing cylinder 225 is similar to that of the second sealing cylinder 2113, and the third sealing cylinder 225 is also a bellows. The second driving member 221 drives the second transmission shaft 222 to move, driving the lifting plate 224 to move, and at the same time, it drives the bellows to compress or extend, so that the lifting transmission cavity 226 becomes shorter or longer accordingly.

[0096] See also Figures 4 to 6 In one embodiment, the heating lifting assembly 22 further includes a plurality of second guide rods 223 , which are disposed on the lifting plate 224 and surround the second transmission shaft 222 .

[0097] It can be understood that the second guide rod 223 is also used to assist the movement of the lifting plate 224. The structure of the second guide rod 223 is similar to that of the first guide rod 2115, and will not be described in detail here.

[0098] In one embodiment, the lifting plate 224 is provided with a second electromagnetic coil 2241, and the second electromagnetic coil 2241 is used to generate a second alternating magnetic field to heat the battery core.

[0099] Optionally, in order to further improve the efficiency of heating the battery core, a second electromagnetic coil 2241 is provided on the lifting plate 224, and the second electromagnetic coil 2241 generates a second alternating magnetic field after being energized to heat the battery core. At this time, the battery core is heated from both sides of the battery core at the same time.

[0100] See also Figure 8 In one embodiment, the lifting plate 224 is provided with a mounting groove 2242 and a mounting block 2243 , the second electromagnetic coil 2241 is laid in the mounting groove 2242 , and the mounting block 2243 presses the second electromagnetic coil 2241 into the mounting groove 2242 .

[0101] In this embodiment, the second electromagnetic coil 2241 is installed in the installation groove 2242 through the installation block 2243, so as to avoid the second electromagnetic coil 2241 directly contacting the battery cell and reduce the damage to the battery cell.

[0102] Optionally, a second cooling component may also be provided in the mounting groove 2242 , and the second cooling component is used to reduce the operating temperature of the second electromagnetic coil 2242 , wherein the structure and function of the second cooling component are the same as those of the first cooling component, and are not elaborated herein.

[0103] In this embodiment, the insulation mechanism 3 heats and keeps the battery cells at the insulation position. The heating structure of the insulation mechanism 3 is the same as the heating structure of the heating mechanism 2. The heating structure of the heating mechanism 2 has been described in the above embodiment, so the heating structure of the insulation mechanism 3 will not be described in detail.

[0104] See also Figures 1 to 3 In one embodiment, the heat preservation mechanism 3 further includes an exhaust component, which is disposed on the box body 1 and corresponds to the heat preservation position, and is used to exhaust water vapor. The box body 1 is also formed with an air inlet 16 and an air outlet 17, both of which correspond to the heat preservation position, and the exhaust component is connected to the air inlet 16 and the air outlet 17 respectively, and the exhaust component delivers dry inert gas to the sealed cavity 12 through the air inlet 16, and exhausts the inert gas with water vapor through the air outlet 17.

[0105] In this embodiment, the heating mechanism 2 evaporates the water between the battery cells and turns it into water vapor. Therefore, at the heat preservation position, the heat preservation mechanism 3 needs to discharge the water vapor. The exhaust assembly forms a complete inert gas circulation loop by connecting with the air inlet 16 and the air outlet 17. The air inlet 16 delivers the dried inert gas to the sealed cavity 12 in the box body 1 to prevent the occurrence of oxidation reaction, and the air outlet 17 discharges the inert gas with water vapor out of the box body 1 to maintain the dry state in the box body 1. In this way, the dry environment of the sealed cavity 12 is ensured in a breathing manner, and the moisture can be discharged in time.

[0106] See also Figure 3 , Fig. 9 and Fig.10 In one embodiment, the box body 1 is provided with two openings 11 communicating with the sealed cavity 12, and the battery cell baking device 100 further includes two sealed doors 5, which are movably provided at the two openings 11, respectively, and the sealed doors 5 include a hinge assembly 51, a sealing plate 52 and a locking member 53. The hinge assembly 51 includes a base plate 511, a rotating plate 512 and an adjusting member, one end of the base plate 511 is adjustably mounted on the box body 1 through the adjusting member, and the other end of the base plate 511 is rotatably connected to the rotating plate 512 through a pin 513. One end of the sealing plate 52 is connected to the rotating plate 512. The locking member 53 is provided on the box body 1, and is used to press the other end of the sealing plate 52 away from the base plate 511 to the opening 11.

[0107] In this embodiment, first, one side of the sealing plate 52 is pre-pressed against the opening 11 by means of the base plate 511, the rotating plate 512 and the adjusting member, and then the other side of the sealing plate 52 away from the connecting plate 510 is pressed against the opening 11 by means of the locking member 53. Finally, by adjusting the adjusting member to a suitable position and completely pressing the sealing plate 52, the tiny gap between the sealing surfaces is effectively reduced, thereby preventing the infiltration of external air and impurities, and ensuring the vacuum state and baking effect of the battery cell baking equipment 100.

[0108] In one embodiment, the base plate 511 is provided with an active hole 5111, which is in a strip shape and extends in a direction perpendicular to the plane where the opening 11 is located. The adjusting member is adjustably arranged in the active hole 5111 and connected to the box body 1 so that one side of the sealing plate 52 is pressed against the opening 11.

[0109] In this embodiment, the movable hole 5111 on the substrate 511 is designed to be long and its extension direction is perpendicular to the plane where the opening 11 is located. The adjustment member can move in the movable hole 5111, so that the sealing door 5 can be fine-tuned according to the actual situation of the box body 1. Changing the position of the adjustment member can effectively reduce the small gap between the sealing surfaces, prevent the infiltration of external air and impurities, and ensure that the battery cell baking device 100 can maintain a vacuum state during the baking process, thereby achieving an ideal baking effect.

[0110] In one embodiment, a plurality of movable holes 5111 are provided, and the extension directions of the plurality of movable holes 5111 are consistent. A plurality of adjusting members are also provided, and each adjusting member corresponds to a movable hole 5111 .

[0111] In this embodiment, a plurality of movable holes 5111 are provided, and each movable hole 5111 is provided with an adjusting member. By providing a plurality of adjusting members, the stability of the sealing plate 52 pressed against the opening 11 can be improved, thereby improving the sealing effect of the sealing plate 52 .

[0112] In one embodiment, two groups of hinge assemblies 51 are provided, and the two groups of hinge assemblies 51 are arranged in parallel on one side of the sealing plate 52. Two groups of locking members 53 are also provided, and the two groups of locking members 53 are arranged in parallel on the other side of the box body 1 away from the hinge assembly 51, and each locking member 53 corresponds to a hinge assembly 51.

[0113] In this embodiment, in order to ensure that the sealing door 5 can fit tightly on the opening 11 of the box body 1 when closed to prevent the infiltration of external air and impurities, two groups of hinge assemblies 51 and two groups of locking members 53 are arranged in parallel to ensure that the sealing door 5 can obtain uniform clamping force when closed.

[0114] In one embodiment, the adjusting member is a bolt, and the box body 1 is further provided with a threaded hole 13 , the threaded hole 13 corresponds to the movable hole 5111 , and the adjusting member passes through the movable hole 5111 and is inserted into the threaded hole 13 .

[0115] In this embodiment, the adjusting member is a bolt, which passes through the movable hole 5111 and is inserted into the threaded hole 13. The base plate 511 moves, and drives the movable hole 5111 to move. When the sealing plate 52 is in close contact with the opening 11, the bolt is rotated again to press the base plate 511 by the bolt to prevent the base plate 511 from moving, thereby fixing the sealing plate 52 to press against the opening 11.

[0116] In one embodiment, a first lug 5112 is provided on one side of the base plate 511 close to the rotating plate 512 , and a second lug 5121 is formed on one side of the rotating plate 512 close to the base plate 511 . The first lug 5112 and the second lug 5121 are coaxially arranged and rotatably connected via a pin 513 .

[0117] In this embodiment, the base plate 511 and the rotating plate 512 are respectively provided with a first lug 5112 and a second lug 5121 , and the first lug 5112 and the second lug 5121 are connected by a pin 513 , thereby ensuring smooth rotation between the base plate 511 and the rotating plate 512 .

[0118] In one embodiment, the locking member 53 includes a mounting portion 531 and a rotating portion 532, wherein the mounting portion 531 is disposed on the box body 1 and the rotating portion 532 is rotatably connected to the mounting portion 531. The rotating portion 532 rotates to abut against one side of the sealing plate 52 to press the sealing plate 52 against the opening 11.

[0119] In this embodiment, the locking member 53 includes a mounting portion 531 and a rotating portion 532. The mounting portion 531 is disposed on the box body 1 to support and fix the box body, and the rotating portion 532 is rotatably connected to the mounting portion 531. When the sealing door 5 needs to be closed, the rotating portion 532 is operated to gradually approach and abut against one side of the sealing plate 52. As the rotating portion 532 continues to rotate, the rotating portion 532 gradually presses the sealing plate 52 against the opening 11 of the box body 1, thereby achieving a tight seal.

[0120] In one embodiment, the sealing door 5 further includes a sealing ring 54 , which is disposed between the sealing plate 52 and the opening 11 .

[0121] In this embodiment, in order to further improve the sealing effect, a sealing ring 54 is further provided between the sealing plate 52 and the opening 11, and the sealing ring 54 is used to fill the small gap between the sealing plate 52 and the opening 11. The sealing ring 54 is made of rubber, silicone or polyurethane.

[0122] See also Figures 1 to 3In one embodiment, the box body 1 is further provided with a transport assembly 6 for transporting the battery cells, and the transport assembly 6 includes a plurality of transport wheels 61, a plurality of transmission groups 62, a driving wheel group 63 and a plurality of transmission belts. The plurality of transport wheels 61 are arranged on opposite sides of the sealed cavity 12 along the first direction, and a transport flow channel 18 is formed on the surface of the transport wheel 61. The plurality of transmission groups 62 are arranged on the box body 1 along the first direction, and each transmission group 62 includes two transmission wheels 621 and a transport transmission shaft 622. The two ends of the transport transmission shaft 622 pass through the two opposite transport wheels 61 respectively and protrude from the box body 1. The two transmission wheels 621 are respectively arranged at the two ends of the transport transmission shaft 622 and are located on the side of the box body 1 away from the transport wheel 61. The driving wheel group 63 includes a transport driving member 631 and a driving shaft 632. The transport driving member 631 is arranged on the side of the box 1 away from the transport wheel 61. One end of the driving shaft 632 is connected to the output end of the transport driving member 631, and the other end passes through two opposite transport wheels 61 and protrudes from the other side of the box 1. A transmission wheel 621 is arranged on the end of the driving shaft 632 away from the transport driving member 631. A plurality of transmission belts are respectively tightened on two adjacent transmission wheels 621 on the same side.

[0123] In one embodiment, the transport channel 18 also forms a cooling position, which is located on the side of the heat preservation position away from the heating position. The battery cell baking equipment 100 also includes a cooling mechanism 4, which is arranged in the box body 1 and corresponds to the cooling position. The cooling mechanism 4 is used to cool the battery cell located at the cooling position.

[0124] In the present embodiment, the transport flow channel 18 is also formed with a cooling position, and the cooling mechanism 4 is arranged at the cooling position. When the battery cell completes the discharge of water at the heat preservation position, the cooling mechanism 4 immediately cools the battery cell. Among them, the cooling mechanism 4 can take away the heat at the cooling position by circulating an inert gas, thereby cooling the battery cell at the cooling position. The cooling mechanism 4 can also be provided with a circulation pipe filled with cooling liquid, and the circulation pipe is in contact with the battery cell to take away the heat. The cooling mechanism 4 can also be a refrigeration unit filled with low-temperature refrigerants such as liquid nitrogen and liquid helium, which absorbs heat through the physical changes of the refrigeration unit itself, thereby reducing the temperature of the battery cell. Therefore, the specific structure of the cooling mechanism 4 is not limited here, and it is only necessary to ensure that the temperature of the battery cell can be reduced in a vacuum environment.

[0125] In one embodiment, the battery cell baking device 100 also includes two partition mechanisms, which are arranged in the box body 1 to divide the sealed cavity 12 into a heating space, a heat preservation space and a cooling space. The heating mechanism 2 is located in the heating space, the heat preservation mechanism 3 is located in the heat preservation space, and the cooling mechanism 4 is located in the cooling space.

[0126] Furthermore, in order to improve the effects of heating, heat preservation and cooling, a partition mechanism is provided to divide the sealed cavity 12 into a heating space, a heat preservation space and a cooling space, and the heating mechanism 2, the heat preservation mechanism 3 and the cooling mechanism 4 can operate independently in the corresponding spaces, respectively, thereby reducing the influence on each other. Moreover, at the heat preservation mechanism 3, since an exhaust assembly is provided, the exhaust assembly only needs to be connected to the heat preservation space, thereby greatly improving the gas exchange efficiency. The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery cell baking device, characterized in that: The battery cell baking equipment comprises: A box body, the box body is provided with a sealed cavity and a transport channel located in the sealed cavity for transporting the battery cells, the transport channel is sequentially provided with a heating position and a heat preservation position along a transport direction; A heating mechanism, the heating mechanism comprising a heating pressing assembly and a heating lifting assembly provided on the box body, the heating pressing assembly and the heating lifting assembly are respectively provided on opposite sides of the heating position, the heating lifting assembly is provided with a lifting plane, the heating pressing assembly is provided with a first electromagnetic coil, and the first electromagnetic coil is used to generate a first alternating magnetic field; and A heat preservation mechanism, which is disposed in the box and corresponds to the heat preservation position, and is used to keep the battery cell at the heat preservation position warm and discharge water vapor; Among them, the heating lifting component drives the lifting plane to protrude from the transport channel so that the battery cell at the heating position leaves the transport channel, and the heating pressing component drives the first electromagnetic coil to approach the battery cell on the lifting plane to heat the battery cell.

2. The battery cell baking device according to claim 1, characterized in that: The heating and pressing assembly comprises: A drive assembly, the drive assembly being disposed on the housing; and A heating plate, the heating plate is connected to the output end of the driving assembly, and the heating plate is provided with the first electromagnetic coil; The driving component drives the heating plate to drive the first electromagnetic coil to approach or move away from the lifting plane.

3. The battery cell baking device according to claim 2, characterized in that: The box body is formed with a first driving hole corresponding to the heating position, and the driving assembly includes: a second sealing cylinder, one end of which is fixed to the box body and communicated with the first driving hole, and the second sealing cylinder is provided with a downward pressure transmission chamber; and A first driving member, the first driving member is arranged in the box body, an output end of the first driving member is provided with a first transmission shaft, one end of the first transmission shaft is passed through the downward pressure transmission cavity, and is connected to the heating plate through the first driving hole; The first driving member drives the first transmission shaft to move along the downward pressure transmission cavity to drive the heating plate and the first electromagnetic coil to approach or move away from the lifting plane.

4. The battery cell baking device according to claim 3, characterized in that: The box body is further formed with a first guide hole, which is arranged adjacent to the first driving hole. The heating and pressing assembly further comprises a first sealing cylinder, which is arranged on the box body and corresponds to the first guide hole to block the first guide hole. The first sealing cylinder is formed with a sealing activity cavity communicated with the first guide hole. A first guide rod is provided on the side of the heating plate facing away from the lifting plane, and one end of the first guide rod movably passes through the first guide hole and extends into the sealed movable cavity.

5. The battery cell baking device according to claim 1, characterized in that: The box body is formed with a second driving hole corresponding to the heating position, and the heating lifting assembly includes a third sealing cylinder, a second driving member and a lifting plate; One end of the third sealing cylinder is fixed to the box body and communicated with the second driving hole, and the third sealing cylinder is provided with a lifting transmission chamber; The second driving member is arranged on the box body, and a second transmission shaft is arranged on the output end of the second driving member, one end of the second transmission shaft is passed through the lifting transmission cavity, and is connected to the lifting plate through the second driving hole; The jacking plate is provided with the jacking plane; The second driving member drives the second transmission shaft to move along the lifting transmission cavity, driving the lifting plate to move, so that the battery cell leaves the transport channel.

6. The battery cell baking device according to claim 5, characterized in that: The lifting plate is provided with a second electromagnetic coil, and the second electromagnetic coil is used to generate a second alternating magnetic field to heat the battery core.

7. The battery cell baking device according to claim 6, characterized in that: The heat preservation mechanism further comprises an exhaust component, which is arranged on the box body and corresponds to the heat preservation position, and is used to exhaust water vapor; The box body is also formed with an air inlet and an air outlet, both of which correspond to the insulation position, and the exhaust component is connected to the air inlet and the air outlet respectively. The exhaust component transports dry inert gas to the sealed cavity through the air inlet and discharges the inert gas with water vapor through the air outlet.

8. The battery cell baking device according to claim 1, characterized in that: The box body is provided with two openings communicating with the sealed cavity, and the battery cell baking device further comprises two sealed doors, which are movably arranged at the two openings respectively, and the sealed doors comprise: A hinge assembly, the hinge assembly comprising a base plate, a rotating plate and an adjusting member, one end of the base plate being adjustably mounted on the box body through the adjusting member, and the other end of the base plate being rotatably connected to the rotating plate through a pin shaft; a sealing plate, one end of which is connected to the rotating plate; and A locking member is arranged on the box body and is used to press the other end of the sealing plate away from the base plate to the opening.

9. The battery cell baking device according to claim 1, characterized in that: The box body is also provided with a transport assembly for transporting the battery cell, and the transport assembly comprises: A plurality of transport wheels, wherein the plurality of transport wheels are arranged on opposite sides of the sealing cavity along a first direction, and the transport flow channel is formed on the surface of the transport wheels; A plurality of transmission groups, wherein the plurality of transmission groups are arranged on the box body along the first direction, each of the transmission groups comprises two transmission wheels and a transport transmission shaft, two ends of the transport transmission shaft respectively pass through two opposite transport wheels and protrude from the box body, and the two transmission wheels are respectively arranged at two ends of the transport transmission shaft and located on a side of the box body away from the transport wheels; A driving wheel group, the driving wheel group comprising a transport driving member and a driving shaft, the transport driving member is arranged on a side of the box away from the transport wheel, one end of the driving shaft is connected to the output end of the transport driving member, and the other end passes through two opposite transport wheels and protrudes from the other side of the box, and the driving shaft is provided with a transmission wheel at one end away from the transport driving member; and A plurality of transmission belts are respectively tensioned on two adjacent transmission wheels on the same side.

10. The battery cell baking device according to any one of claims 1 to 9, characterized in that: The transport flow channel also forms a cooling position, which is located on the side of the heat preservation position away from the heating position. The battery cell baking equipment also includes a cooling mechanism, which is arranged in the box and corresponds to the cooling position. The cooling mechanism is used to cool the battery cell located at the cooling position.

Images