A multi-layer stacking baking system

Abstract

The present invention discloses a multi-layer stacked baking system, including a plurality of stacked vacuum baking furnaces, a baking fixture for placing and heating battery cells, a plurality of side-by-side vacuum chambers for stacking the baking fixtures, an automatic power connection structure matched with the static electric contact of the baking fixtures is provided at the rear end of the vacuum chamber, and a furnace door is provided at the opening of each vacuum chamber, and the vacuum chamber matches with the corresponding furnace door to form a sealing structure. A single vacuum baking furnace of the present invention has a plurality of side-by-side large chambers, and baking fixtures can be stacked in the large chambers. Under the same floor space, the number of battery cells that can be baked far exceeds that of traditional baking furnaces, and can meet the requirements of high speed and high production capacity.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery baking furnaces, and in particular to a multi-layer stacking baking system. Background Art

[0002] At present, the lithium battery industry at home and abroad has a good development prospect. Lithium-ion batteries have been widely used in portable appliances such as laptops, cameras, and mobile communications due to their unique performance advantages. The large-capacity lithium-ion batteries currently developed have begun to be used in electric vehicles and are expected to become one of the main power sources for electric vehicles in the 21st century. They will also be used in artificial satellites and aerospace. With the increasing shortage of energy and increasing pressure on environmental protection, lithium batteries are widely used in the electric vehicle industry, especially the emergence of lithium iron phosphate batteries, which has further promoted the development and application of the lithium battery industry. In order to ensure the high quality of lithium batteries, it is necessary to strictly control the production environment of each process in the production of lithium batteries.

[0003] In the production process of lithium batteries, a vacuum baking furnace is generally used in conjunction with a baking fixture to vacuum bake and dry the lithium battery cells. In the existing vacuum baking furnace, the power connection structure that is connected to the baking fixture to complete the power connection is generally set at the bottom of the vacuum cavity. When the baking fixture is placed in the vacuum cavity of the vacuum baking furnace, the power connection structure of the baking fixture is connected to the power connection structure in the vacuum cavity, which also results in that only the baking fixture on the bottom layer of the stacked baking fixtures can be connected to the vacuum baking furnace to complete the power connection. Therefore, the existing vacuum baking furnace can only have a single cavity and a single fixture, and a furnace has a maximum of five layers, with low space utilization. Under the same floor area, the capacity improvement of the entire line is limited, and the requirements of high speed and high capacity cannot be met. Summary of the invention

[0004] In order to overcome the technical problems of low space utilization and inability to meet high speed and high production capacity in existing vacuum baking furnaces, the present invention provides a multi-layer stacking baking system.

[0005] The technical solution of the present invention is as follows:

[0006] A multi-layer stacked baking system, comprising a plurality of stacked vacuum baking ovens, a plurality of baking fixtures for placing battery cells and heating the battery cells, a plurality of vacuum chambers arranged side by side for stacking the baking fixtures are arranged in the vacuum baking oven, an automatic power connection structure matched with the static power contact of the baking fixture is arranged at the rear end of the vacuum chamber, a furnace door is arranged at the opening of each vacuum chamber, and the vacuum chamber matches with the corresponding furnace door to form a sealing structure;

[0007] When the oven door is closed, the movable electric contact of the automatic power connection structure is engaged with the static electric contact of the baking clamp; when the oven door is opened, the movable electric contact of the automatic power connection structure is separated from the static electric contact of the baking clamp.

[0008] According to the multi-layer stacked baking system of the above scheme, the baking clamp includes a clamp frame and a heating base plate laid on the inner bottom end of the clamp frame, the four outer corners of the clamp frame are provided with positioning supports, the top of the positioning support is provided with a first positioning member, the bottom of the positioning support is provided with a second positioning member matching the first positioning member, a PCB signal board is provided at the rear of the clamp frame, the heating base plate is electrically connected to the PCB signal board, and the rear of the PCB signal board is provided with static electrical contacts electrically connected to the moving electrical contacts of the automatic power connection structure.

[0009] Further, the first positioning member is a positioning hole, and the second positioning member is a positioning pin; or, the first positioning member is a positioning pin, and the second positioning member is a positioning hole.

[0010] Furthermore, the highest point of the positioning support member is not lower than the top surface of the clamp frame, and the lowest point of the positioning support member is lower than the bottom surface of the clamp frame.

[0011] Furthermore, the baking fixture also includes four heating side plates, which are respectively arranged around the heating bottom plate, and the four heating side plates are respectively electrically connected to the PCB signal board.

[0012] Furthermore, there is a gap between the heating side plate and the side plate of the clamp frame, and a fixed clamp block is provided on the outer side of the heating side plate, the bottom of the fixed clamp block is fixed to the end of the heating bottom plate, and / or the bottom of the fixed clamp block is fixed to the bottom of the clamp frame.

[0013] Furthermore, the baking clamp also includes a battery cell limiting thermally conductive aluminum block, which is arranged in the space surrounded by the heating base plate and the heating side plate, and is in contact with the heating base plate and the heating side plate. The battery cell limiting thermally conductive aluminum block is provided with a plurality of battery cell placement holes arranged in an array that match the battery cells.

[0014] Furthermore, a cover plate is arranged on the top of the battery cell limiting heat-conducting aluminum block, and a plurality of battery cell guide holes corresponding to the battery cell placement holes are arranged on the cover plate.

[0015] Furthermore, the heating base plate includes a plurality of heating sub-base plates arranged in an array, the heating sub-base plate and the heating side plate are both provided with a first probe and a second probe, and the heating sub-base plate, the first probe and the second probe are electrically connected to the PCB signal board respectively.

[0016] Furthermore, the baking fixture further comprises a temperature control module and a patrol module, wherein the temperature control module and the patrol module are arranged at the rear of the fixture frame, and the temperature control module and the patrol module are electrically connected to the PCB signal board.

[0017] Furthermore, a first reflective plate is provided on the inner surface of the side plate of the clamp frame.

[0018] According to the multi-layer stacked baking system of the above scheme, the automatic power connection structure includes a moving contact back plate and an upper front-to-back translation guide mechanism and a lower front-to-back translation guide mechanism symmetrically arranged at the upper and lower ends of the moving contact back plate. The front side of the moving contact back plate is provided with a plurality of moving electric contacts that cooperate with the static electric contacts of the corresponding baking clamps stacked in the vacuum chamber. The upper front-to-back translation guide mechanism and the lower front-to-back translation guide mechanism cooperate with the closing and opening of the corresponding oven door to drive the moving contact back plate to translate forward or backward, thereby realizing the engagement or separation of the moving electric contacts on the moving contact back plate with the static electric contacts on the baking clamps.

[0019] Furthermore, the upper front-to-back translation guide mechanism includes a first horizontal guide rod, a first connecting rod, a first fixed seat and a first floating seat, one end of the first horizontal guide rod extends to the outside of the opening of the vacuum chamber, the other end of the first horizontal guide rod passes through the upper end of the moving contact back plate and is hinged to the upper end of the first connecting rod, the moving contact back plate is slidably connected to the first horizontal guide rod and can move forward and backward along the first horizontal guide rod, the middle end of the first connecting rod is hinged to one end of the first fixed seat, the other end of the first fixed seat is fixed to the vacuum chamber, the lower end of the first connecting rod is hinged to one end of the first floating seat, and the other end of the first floating seat is fixed to the upper end of the back side of the moving contact back plate.

[0020] Furthermore, a first spring positioning ring is provided at one end of the first horizontal guide rod close to the moving contact back plate, and the first spring positioning ring is located on the front side of the moving contact back plate, a first return spring is provided between the first spring positioning ring and the moving contact back plate, the first return spring is sleeved on the first horizontal guide rod, and two ends of the first return spring are respectively abutted against the first spring positioning ring and the moving contact back plate.

[0021] Furthermore, a first door closing contact guide wheel is provided at one end of the first horizontal guide rod away from the moving contact back plate.

[0022] Furthermore, one end of the first horizontal guide rod close to the moving contact back plate is hinged to the upper end of the first connecting rod through a first bearing.

[0023] Furthermore, one end of the first fixing seat away from the vacuum chamber is hinged to the middle end of the first connecting rod through a second bearing.

[0024] Furthermore, one end of the first floating seat away from the moving contact back plate is hinged to the lower end of the first connecting rod through a third bearing.

[0025] Furthermore, the lower front-to-back translation guide mechanism includes a second horizontal guide rod, a second connecting rod, a second fixed seat and a second floating seat, one end of the second horizontal guide rod extends to the outside of the opening of the vacuum chamber, the other end of the second horizontal guide rod passes through the lower end of the moving contact back plate and is hinged to the lower end of the second connecting rod, the moving contact back plate is slidably connected to the second horizontal guide rod and can move forward and backward along the second horizontal guide rod, the middle end of the second connecting rod is hinged to one end of the second fixed seat, the other end of the second fixed seat is fixed to the vacuum chamber, the upper end of the second connecting rod is hinged to one end of the second floating seat, and the other end of the second floating seat is fixed to the lower end of the back side of the moving contact back plate.

[0026] Furthermore, a second spring positioning ring is provided at one end of the second horizontal guide rod close to the moving contact back plate, and the second spring positioning ring is located on the front side of the moving contact back plate, a second return spring is provided between the second spring positioning ring and the moving contact back plate, the second return spring is sleeved on the second horizontal guide rod, and two ends of the second return spring are respectively abutted against the second spring positioning ring and the moving contact back plate.

[0027] Furthermore, a second door closing contact guide wheel is provided at one end of the second horizontal guide rod away from the moving contact back plate.

[0028] Furthermore, one end of the second horizontal guide rod close to the moving contact back plate is hinged to the upper end of the second connecting rod through a fourth bearing.

[0029] Furthermore, one end of the second fixing seat away from the vacuum chamber is hinged to the middle end of the second connecting rod through a fifth bearing.

[0030] Furthermore, one end of the second floating seat away from the moving contact back plate is hinged to the lower end of the second connecting rod through a sixth bearing.

[0031] According to the multi-layer stacked baking system of the above scheme, the upper and lower ends of the oven door are slidably connected to the vacuum baking oven, and the vacuum baking oven is provided with a first linear motion mechanism for driving the oven door to translate forward and backward and a second linear motion mechanism for driving the oven door to translate left and right toward the adjacent oven door.

[0032] Furthermore, an upper guide groove base is provided above the furnace door, and an upper switch door guide groove and an upper translation guide groove are provided at the bottom of the upper guide groove base, the upper switch door guide groove and the upper translation guide groove are perpendicular to and connected with each other, an upper guide wheel matching with the upper switch door guide groove and the upper translation guide groove is provided on the top of the furnace door, a floating translation guide groove and a lower translation guide groove are provided below the furnace door, the first linear motion mechanism is connected with the floating translation guide groove and drives the floating translation guide groove to move forward and backward so that the floating translation guide groove is connected with the lower translation guide groove, and a lower guide wheel and a translation wheel matching with the floating translation guide groove and the lower translation guide groove are provided at the bottom of the furnace door corresponding to the position of the floating translation guide groove.

[0033] Furthermore, the floating translation guide groove includes an inner translation guide groove and an outer translation guide groove arranged side by side front and back, and the spacing between the inner translation guide groove and the outer translation guide groove matches the distance of the front and rear translation after the furnace door is opened. When the furnace door is opened, the inner translation guide groove is connected with the lower translation guide groove; when the furnace door is closed, the outer translation guide groove is connected with the lower translation guide groove.

[0034] Furthermore, a guide wheel seat is arranged at the bottom of the furnace door corresponding to the position of the floating translation guide groove, the lower guide wheels are arranged at the left and right ends of the guide wheel seat, and the translation wheels are arranged side by side at the bottom of the guide wheel seat.

[0035] Furthermore, limit buffer blocks are provided at the left and right ends of the guide wheel seat, and the distance between the two opposite ends of the limit buffer blocks matches the length of the floating translation guide groove.

[0036] Furthermore, the first linear motion mechanism includes an upper front-to-back motion cylinder and a lower front-to-back motion cylinder, and the upper front-to-back motion cylinder and the lower front-to-back motion cylinder are respectively fixed on the upper and lower sides of the furnace mouth of the vacuum baking furnace, and the front and rear translation ends of the upper front-to-back motion cylinder are provided with a pushing assembly, and the top of the furnace door is provided with a door opening and closing clamping plate that cooperates with the pushing assembly, and the front and rear translation ends of the lower front-to-back motion cylinder are connected to the floating translation guide groove.

[0037] Furthermore, the pushing assembly includes a first front and rear slide rail and a front and rear push block, the top of the first front and rear slide rail is fixed to the bottom of the upper guide groove base, the bottom of the first front and rear slide rail is slidably connected to the top of the front and rear push block, the bottom of the front and rear push block is provided with a switch door slot that cooperates with the switch door card plate, and the left and right ends of the switch door slot are provided with openings for the switch door card plate to enter or leave.

[0038] Furthermore, the lower front-rear motion cylinder is fixed to the lower side of the furnace opening of the vacuum baking furnace through a switch door base.

[0039] Furthermore, second front and rear slide rails are provided on both sides of the left and right sides of the lower front and rear motion cylinder, the bottom of the second front and rear slide rails is fixed on the switch door base, and the bottom of the floating translation guide groove is slidably connected to the top of the second front and rear slide rails.

[0040] Furthermore, a front limit block for limiting the maximum forward travel of the floating translation guide groove and a rear limit block for limiting the maximum backward travel of the floating translation guide groove are provided on the switch door base, and a limit block cooperating with the front limit block and the rear limit block is provided at the bottom of the floating translation guide groove.

[0041] Furthermore, the second linear motion mechanism is arranged at the lower front side of the furnace door, and the second linear motion mechanism includes a driving motor, a translation belt, a translation block and a translation slide rail. The driving motor is fixed to the vacuum baking furnace, and the rotating shaft of the driving motor is connected to one end of the translation belt. The translation block is fixed to the side of the translation belt close to the furnace door, and the bottom of the translation slide rail is fixed to the vacuum baking furnace and is located below the translation block. The bottom of the translation block is slidably connected to the top of the translation slide rail. The driving motor drives the translation belt to rotate, so that the translation belt drives the translation block to translate left and right along the translation slide rail. The bottom of the furnace door is provided with a translation slot for inserting the translation block.

[0042] According to the multi-layer stacked baking system of the above scheme, a clamp load-bearing beam is respectively arranged at the left and right ends of the inner bottom surface of the vacuum chamber, and a positioning block matching with the baking clamp is arranged on the clamp load-bearing beam.

[0043] According to the multi-layer stacked baking system of the above solution, the oven door includes a door outer shell and a sealing plate arranged on the inner side of the door outer shell, and the door outer shell is connected to the sealing plate through a plurality of elastic members distributed in an array.

[0044] Furthermore, a second reflective plate is arranged on the inner side of the sealing plate.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] 1. The vacuum baking oven adopts modular segmented splicing combination design. Customers can freely increase or decrease the vacuum baking oven according to the expected battery cell output. At the same time, it can be transported to the customer's site in segments, effectively solving the problem that the baking oven is too high to be transported;

[0047] 2. The baking fixtures are stacked and placed in the vacuum baking oven cavity, and the cavity stacking occupies less space than the traditional baking oven;

[0048] 3. A single vacuum baking oven has multiple large cavities arranged side by side, and baking fixtures can be stacked in the large cavity. The structure is compact, and the number of layers far exceeds five. After multiple vacuum baking ovens are stacked, the number of cells that can be baked in the same floor space far exceeds that of traditional baking ovens, which can meet the requirements of high speed and high production capacity.

[0049] 4. The automatic power connection structure realizes the power connection of the multi-layer stacked baking fixtures in the vacuum chamber, solving the problem that it is difficult to connect the multi-layer stacked fixtures to the power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a structural schematic diagram of the present invention;

[0051] Figure 2 It is a structural schematic diagram of the stacked baking fixture and the automatic power connection structure of the present invention;

[0052] Figure 3 It is a structural schematic diagram of the baking clamp in the present invention;

[0053] Figure 4 A schematic structural diagram of the baking clamp of the present invention from another perspective;

[0054] Figure 5 An exploded view of the baking fixture of the present invention;

[0055] Figure 6 It is a structural schematic diagram of the automatic power connection structure in the present invention;

[0056] Figure 7 It is a side view of the automatic power connection structure of the present invention;

[0057] Figure 8 It is a structural schematic diagram of the furnace door, the first linear motion mechanism and the second linear motion mechanism in the present invention;

[0058] Fig. 9 It is a structural schematic diagram of the furnace door, the first linear motion mechanism and the second linear motion mechanism in the present invention from another perspective;

[0059] Fig.10 It is a schematic diagram of the structure of the upper guide groove base and the upper front-rear motion cylinder in the present invention;

[0060] Fig.11 for Fig.10 A magnified view of part A;

[0061] Fig.12 It is a schematic structural diagram of the lower front-rear motion cylinder, the second linear motion mechanism, the floating translation guide groove and the lower translation guide groove in the present invention;

[0062] Fig.13 for Fig.12 A magnified view of part B;

[0063] Fig.14 It is a structural schematic diagram of the furnace door in the present invention;

[0064] Fig.15 It is a structural schematic diagram of the furnace door in another perspective of the present invention;

[0065] Fig.16 It is an exploded view of the furnace door in the present invention.

[0066] In the figure,

[0067] 1. Vacuum baking oven; 101. Vacuum chamber; 102. Clamp bearing beam; 2. Baking fixture; 201. Clamp frame; 202. Heating base plate; 2021. Heating sub-base plate; 203. Heating side plate; 204. Thermal conductive aluminum block for limiting battery cells; 2041. Battery cell placement hole; 205. Positioning support; 2051. First positioning member; 2052. Second positioning member; 206. PCB signal board; 2061. Static electrical contact; 207. Fixed clamp block; 208. Cover plate; 2081. Battery cell guide hole; 209. First probe; 210. Second probe; 211. Temperature control module; 212. Inspection Module; 213, first reflector; 3, battery cell; 4, automatic power connection structure; 401, moving contact back plate; 4011, moving electric contact; 402, upper front-to-back translation guide mechanism; 4021, first horizontal guide rod; 4022, first connecting rod; 4023, first fixed seat; 4024, first floating seat; 4025, first bearing; 4026, second bearing; 4027, third bearing; 4028, first spring positioning ring; 4029, first return spring; 4030, first door closing touch guide wheel; 403, lower front-to-back translation guide mechanism; 4031, second horizontal guide rod; 4032, second connecting rod ; 4033, second fixed seat; 4034, second floating seat; 4035, fourth bearing; 4036, fifth bearing; 4037, sixth bearing; 4038, second spring positioning ring; 4039, second return spring; 4040, second door closing touch guide wheel; 5, furnace door; 501, upper guide wheel; 502, lower guide wheel; 503, translation wheel; 504, guide wheel seat; 505, limit buffer block; 506, switch door card plate; 507, translation card slot; 508, door shell; 509, sealing plate; 510, elastic member; 511, second reflector; 6, first linear motion mechanism; 601, upper front Rear motion cylinder; 602, lower front and rear motion cylinder; 603, first front and rear slide rails; 604, front and rear push blocks; 6041, door opening and closing slot; 605, door opening and closing base; 606, second front and rear slide rails; 607, front limit block; 608, rear limit block; 7, second linear motion mechanism; 701, drive motor; 702, translation belt; 703, translation block; 704, translation slide rail; 8, upper guide groove base; 801, upper door opening and closing guide groove; 802, upper translation guide groove; 9, floating translation guide groove; 901, inner translation guide groove; 902, outer translation guide groove; 903, limit block; 10, lower translation guide groove. DETAILED DESCRIPTION

[0068] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0069] It should be noted that the terms "install", "set", "connect", "fix" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. The directions or positions indicated by the terms "upper", "lower", "left", "right", "bottom", "top", "front", "back" and the like are based on the directions or positions shown in the accompanying drawings, which are only for the convenience of description and cannot be understood as limitations on the present technical solution. The terms "first", "second", "third", "fourth", "fifth" and "sixth" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly defined. "Several" means one or more, unless otherwise clearly defined.

[0070] See also Figure 1 , Figure 2 The present embodiment provides a multi-layer stacked baking system, comprising a plurality of stacked vacuum baking furnaces 1, and baking fixtures 2 for placing and heating battery cells 3. The vacuum baking furnace 1 is provided with a plurality of vacuum chambers 101 arranged side by side for stacking the baking fixtures 2. The rear end of the vacuum chamber 101 is provided with an automatic power connection structure 4 matched with the static electric contact 2061 of the baking fixture 2. A furnace door 5 is provided at the opening of each vacuum chamber 101, and the vacuum chamber 101 cooperates with the corresponding furnace door 5 to form a sealing structure. When the oven door 5 is closed, the moving electrical contact 4011 of the automatic power connection structure 4 is engaged with the static electrical contact 2061 of the baking clamp 2, so that the clamp is automatically powered on and the battery cell 3 placed in the baking clamp 2 is baked; when the oven door 5 is opened, the moving electrical contact 4011 of the automatic power connection structure 4 is separated from the static electrical contact 2061 of the baking clamp 2, so that the clamp is automatically powered off and the baking operation is stopped. The vacuum baking furnace 1 of the present invention adopts a modular segmented splicing combination design. Customers can freely increase or decrease the vacuum baking furnace 1 according to the expected output of battery cells 3. At the same time, it can be transported to the customer's site in segments, effectively solving the problem that the baking furnace is too high to be transported. A single vacuum baking furnace 1 has multiple large cavities side by side, and baking fixtures 2 can be stacked in the large cavity. The structure is compact and the number of layers far exceeds five. After multiple vacuum baking furnaces 1 are stacked, the number of battery cells 3 that can be baked in the same area far exceeds that of traditional baking furnaces, which can meet the requirements of high speed and high production capacity. The automatic power connection structure 4 realizes the power connection of the multi-layer stacked baking fixtures 2 in the vacuum cavity 101, solving the problem that it is difficult to connect the multi-layer stacked fixtures to power.

[0071] See also Figures 3 to 5 In a preferred embodiment, the baking fixture 2 includes a fixture frame 201, a heating bottom plate 202, four heating side plates 203 and a battery cell limiting heat-conducting aluminum block 204. The heating bottom plate 202 is laid on the inner bottom end of the fixture frame 201, and the four heating side plates 203 are respectively arranged around the heating bottom plate 202. The battery cell limiting heat-conducting aluminum block 204 is arranged in a space enclosed by the heating bottom plate 202 and the heating side plates 203, and is in contact with the heating bottom plate 202 and the heating side plates 203. The core limiting thermally conductive aluminum block 204 is provided with a plurality of array-arranged cell placement holes 2041 that match the cell 3. The cell 3 is a cylindrical bare lithium battery cell. When the cell 3 is placed in the cell placement hole 2041, heat is transferred to the cell limiting thermally conductive aluminum block 204 through the heating base plate 202, thereby baking the cell 3. The surrounding heating side plates 203 compensate for the heat loss around the cell limiting thermally conductive aluminum block 204, thereby effectively controlling the temperature rise uniformity of various parts of the cell limiting thermally conductive aluminum block 204. The four outer corners of the clamp frame 201 are each provided with a positioning support 205, the top of the positioning support 205 is provided with a first positioning member 2051, and the bottom of the positioning support 205 is provided with a second positioning member 2052 that cooperates with the first positioning member 2051. The setting of the above-mentioned positioning support 205 can realize precise stacking of multiple clamps together. In addition, the second positioning member 2052 is also coordinated with the positioning member at the bottom of the vacuum baking furnace 1 cavity to position the bottom clamp in the vacuum baking furnace 1 cavity to achieve precise power connection. A PCB signal board 206 is arranged at the rear of the clamp frame 201, the heating base plate 202 is electrically connected to the PCB signal board 206, and a static electric contact 2061 is arranged at the rear of the PCB signal board 206 to be electrically connected to the moving electric contact 4011 of the automatic power connection structure 4. The arrangement of the above-mentioned PCB signal board 206 and the static electric contact 2061 can make it possible for the clamps to be stacked and placed in the cavity of the vacuum baking furnace 1, and to be electrically connected in cooperation with the moving electric contact 4011 of the automatic power connection structure 4, and the power connection method has a simple structure and a low manufacturing cost; at the same time, it can be stacked and placed in the cavity of the vacuum baking furnace 1 and electrically connected to the vacuum baking furnace 1 at the same time, so that the space inside the vacuum baking furnace 1 is fully utilized, and the structure is compact, which can reduce the occupied space.

[0072] See also Figures 3 to 5 Furthermore, the first positioning member 2051 is a positioning hole, the second positioning member 2052 is a positioning pin, and the highest point of the positioning support member 205 is not lower than the top surface of the clamp frame 201, and the lowest point of the positioning support member 205 is lower than the bottom surface of the clamp frame 201, so that the positioning pin at the bottom of the upper clamp can be inserted into the positioning hole at the top of the lower clamp, thereby realizing the stacking and positioning of multiple layers of clamps. Of course, in another embodiment, the first positioning member 2051 can be a positioning pin, and the second positioning member 2052 can be a positioning hole, and the present invention is not limited to this.

[0073] See also Figure 5 Furthermore, there is a gap between the heating side plate 203 and the side plate of the clamp frame 201, and a fixed clamp block 207 is provided on the outer side of the heating side plate 203. The bottom of the fixed clamp block 207 is fixed to the end of the heating bottom plate 202, and / or the bottom of the fixed clamp block 207 is fixed to the bottom of the clamp frame 201. The fixed clamp block 207 enables the heating side plate 203 to fit tightly with the battery cell limiting thermal conductive aluminum block 204 to ensure heat transfer. In addition, the fixed clamp block 207 can also prevent the heating side plate 203 from directly contacting the clamp frame 201 to prevent heat loss.

[0074] See also Figure 5 Furthermore, a cover plate 208 is provided on the top of the battery cell limiting heat-conducting aluminum block 204, and a plurality of battery cell guide holes 2081 corresponding to the battery cell placement holes 2041 are provided on the cover plate 208. The cover plate 208 is made of non-metallic material to prevent the battery cell 3 from directly hitting the metal. Preferably, the cover plate 208 is a fiberglass cover plate. At the same time, a guiding cone surface is provided on the inner side of the top of the battery cell guide hole 2081, so that the battery cell 3 is more easily inserted into the battery cell guide hole 2081, and then inserted into the battery cell placement hole 2041.

[0075] See also Figure 5 Furthermore, the heating base plate 202 includes a plurality of heating sub-base plates 2021 arranged in an array. The heating sub-base plate 2021 and the heating side plate 203 are both provided with a first probe 209 and a second probe 210. The heating sub-base plate 2021, the first probe 209 and the second probe 210 are electrically connected to the PCB signal board 206 respectively. The first probe 209 is used to detect the real-time speed of the heating sub-base plate 2021 and the heating side plate 203, and the second probe 210 is used to monitor whether the operation of the heating sub-base plate 2021 and the heating side plate 203 is normal, such as monitoring whether the temperature reaches a predetermined value.

[0076] See also Figures 3 to 5 Furthermore, the baking fixture 2 also includes a temperature control module 211 and a patrol module 212. The temperature control module 211 and the patrol module 212 are arranged at the rear of the fixture frame 201. The temperature control module 211 and the patrol module 212 are electrically connected to the PCB signal board 206 respectively. The temperature control module 211 is used to control and adjust the heating temperature and heating time of the heating bottom plate 202 and the heating side plate 203, etc.; the temperature control module 211 and the patrol module 212 form a double insurance temperature control mode. When the temperature control module 211 fails, the patrol module 212 can react immediately and cut off the heating power supply.

[0077] See also Figure 3 , Figure 5Furthermore, the inner surface of the side plate of the clamp frame 201 is provided with a first reflector 213, which can effectively prevent heat dissipation, further shorten the preheating speed of the battery cell 3, and improve work efficiency.

[0078] See also Figure 6 , Figure 7 In a preferred embodiment, the automatic power connection structure 4 includes a moving contact back plate 401 and an upper front-to-back translation guide mechanism 402 and a lower front-to-back translation guide mechanism 403 symmetrically arranged at the upper and lower ends of the moving contact back plate 401. The front of the moving contact back plate 401 is provided with a plurality of moving electric contacts 4011 that cooperate with the static electric contacts 2061 of the corresponding baking clamps 2 stacked in the vacuum chamber 101. The upper front-to-back translation guide mechanism 402 and the lower front-to-back translation guide mechanism 403 cooperate with the closing and opening of the corresponding oven door 5 to drive the moving contact back plate 401 to translate forward or backward, thereby realizing the engagement or separation of the moving electric contacts 4011 on the moving contact back plate 401 with the static electric contacts 2061 on the baking clamps 2. When the oven door 5 is closed, the oven door 5 cooperates with the upper front-to-back translation guide mechanism 402 and the lower front-to-back translation guide mechanism 403 to drive the moving contact back plate 401 to move forward, so that the moving electrical contact 4011 on the moving contact back plate 401 is pressed against the corresponding static electrical contact 2061 of the baking fixture 2, thereby realizing automatic power connection of the fixture; when the oven door 5 is opened, the oven door 5 cooperates with the upper front-to-back translation guide mechanism 402 and the lower front-to-back translation guide mechanism 403 to drive the moving contact back plate 401 to move backward, so that the moving electrical contact 4011 on the moving contact back plate 401 is separated from the static electrical contact 2061 on the baking fixture 2, thereby realizing automatic power off of the fixture. The above-mentioned automatic power connection structure 4 realizes power connection of the multi-layer stacked baking fixtures 2 in the vacuum chamber 101 through the upper front-to-back translation guide mechanism 402 and the lower front-to-back translation guide mechanism 403 cooperate with the oven door 5, and the new power connection method solves the problem that it is difficult to realize power connection of multi-layer stacked fixtures.

[0079] Specifically, the upper front-to-back translation guide mechanism 402 includes a first horizontal guide rod 4021, a first connecting rod 4022, a first fixed seat 4023 and a first floating seat 4024. One end of the first horizontal guide rod 4021 extends to the outside of the opening of the vacuum chamber 101, and the other end of the first horizontal guide rod 4021 passes through the upper end of the moving contact back plate 401 and is hinged to the upper end of the first connecting rod 4022 through a first bearing 4025. The moving contact back plate 401 is slidably connected to the first horizontal guide rod 4021 and can move forward and backward along the first horizontal guide rod 4021. The middle end of the first connecting rod 4022 is hinged to one end of the first fixed seat 4023 through a second bearing 4026, and the other end of the first fixed seat 4023 is fixed to the vacuum chamber 101. The lower end of the first connecting rod 4022 is hinged to one end of the first floating seat 4024 through a third bearing 4027, and the other end of the first floating seat 4024 is fixed to the upper end of the back side of the moving contact back plate 401. At the same time, a first spring positioning ring 4028 is provided at one end of the first horizontal guide rod 4021 close to the moving contact back plate 401, and the first spring positioning ring 4028 is located on the front side of the moving contact back plate 401, and a first return spring 4029 is provided between the first spring positioning ring 4028 and the moving contact back plate 401, and the first return spring 4029 is sleeved on the first horizontal guide rod 4021, and both ends of the first return spring 4029 are respectively abutted against the first spring positioning ring 4028 and the moving contact back plate 401. When the oven door 5 is closed, the oven door 5 moves backward and presses against the corresponding end of the first horizontal guide rod 4021. The first horizontal guide rod 4021 moves backward as the oven door 5 is closed. When the first horizontal guide rod 4021 moves backward, the connecting rod mechanism formed by the first connecting rod 4022, the first fixed seat 4023 and the first floating seat 4024 drives the moving contact back plate 401 to move forward along the first horizontal guide rod 4021, so that the moving electrical contact 4011 on the moving contact back plate 401 is pressed against the corresponding static electrical contact 2061 of the baking clamp 2, so that the clamp is automatically powered on. At this time, the first reset spring 4029 is further compressed under the mutual squeezing of the first spring positioning ring 4028 and the moving contact back plate 401, generating a reset elastic force. When the oven door 5 is opened, the oven door 5 moves forward, and the first horizontal guide rod 4021 moves forward under the action of the reset elastic force generated by the first reset spring 4029. When the first horizontal guide rod 4021 moves forward, the connecting rod mechanism formed by the first connecting rod 4022, the first fixed seat 4023 and the first floating seat 4024 drives the moving contact back plate 401 to move backward along the first horizontal guide rod 4021, thereby separating the moving electrical contact 4011 on the moving contact back plate 401 from the static electrical contact 2061 of the baking clamp 2, thereby realizing automatic power off of the clamp.

[0080] Furthermore, a first door closing contact guide wheel 4030 is provided at one end of the first horizontal guide rod 4021 away from the moving contact back plate 401 , and the first door closing contact guide wheel 4030 can reduce the wear caused by the contact between the first horizontal guide rod 4021 and the furnace door 5 when opening and closing the furnace door 5 .

[0081] Specifically, the lower front-to-back translation guide mechanism 403 includes a second horizontal guide rod 4031, a second connecting rod 4032, a second fixed seat 4033 and a second floating seat 4034. One end of the second horizontal guide rod 4031 extends to the outside of the opening of the vacuum chamber 101, and the other end of the second horizontal guide rod 4031 passes through the lower end of the moving contact back plate 401 and is hinged to the lower end of the second connecting rod 4032 through a fourth bearing 4035. The moving contact back plate 401 is slidably connected to the second horizontal guide rod 4031 and can move forward and backward along the second horizontal guide rod 4031. The middle end of the second connecting rod 4032 is hinged to one end of the second fixed seat 4033 through a fifth bearing 4036, and the other end of the second fixed seat 4033 is fixed to the vacuum chamber 101. The upper end of the second connecting rod 4032 is hinged to one end of the second floating seat 4034 through a sixth bearing 4037, and the other end of the second floating seat 4034 is fixed to the lower end of the back side of the moving contact back plate 401. At the same time, a second spring positioning ring 4038 is provided at one end of the second horizontal guide rod 4031 close to the moving contact back plate 401, and the second spring positioning ring 4038 is located on the front side of the moving contact back plate 401, and a second return spring 4039 is provided between the second spring positioning ring 4038 and the moving contact back plate 401, and the second return spring 4039 is sleeved on the second horizontal guide rod 4031, and the two ends of the second return spring 4039 are respectively abutted against the second spring positioning ring 4038 and the moving contact back plate 401. When the oven door 5 is closed, the oven door 5 moves backward and presses against the corresponding end of the second horizontal guide rod 4031. The second horizontal guide rod 4031 moves backward as the oven door 5 is closed. When the second horizontal guide rod 4031 moves backward, the connecting rod mechanism formed by the second connecting rod 4032, the second fixed seat 4033 and the second floating seat 4034 drives the moving contact back plate 401 to move forward along the second horizontal guide rod 4031, so that the moving electrical contact 4011 on the moving contact back plate 401 is pressed against the corresponding static electrical contact 2061 of the baking clamp 2, so that the clamp is automatically powered on. At this time, the second reset spring 4039 is further compressed under the mutual squeezing of the second spring positioning ring 4038 and the moving contact back plate 401, generating a reset elastic force. When the oven door 5 is opened, the oven door 5 moves forward, and the second horizontal guide rod 4031 moves forward under the action of the reset elastic force generated by the second reset spring 4039. When the second horizontal guide rod 4031 moves forward, the connecting rod mechanism formed by the second connecting rod 4032, the second fixed seat 4033 and the second floating seat 4034 drives the moving contact back plate 401 to move backward along the second horizontal guide rod 4031, thereby separating the moving electrical contact 4011 on the moving contact back plate 401 from the static electrical contact 2061 of the baking clamp 2, thereby realizing automatic power off of the clamp.

[0082] Furthermore, a second door closing contact guide wheel 4040 is provided at one end of the second horizontal guide rod 4031 away from the moving contact back plate 401 , and the second door closing contact guide wheel 4040 can reduce the wear caused by the contact between the first horizontal guide rod 4021 and the furnace door 5 when opening and closing the furnace door 5 .

[0083] The upper front-to-back translation guide mechanism 402 and the lower front-to-back translation guide mechanism 403 set up above adopt a connecting rod transmission method to cooperate with the closing and opening of the furnace door 5 to smoothly drive the moving contact back plate 401 to move forward and backward, thereby realizing automatic power connection and power disconnection of the fixture; the structure is simple and occupies a small space, so that more baking fixtures 2 can be stacked in the vacuum chamber 101, and more batteries can be baked.

[0084] See also Figure 8 , Fig. 9 In a preferred embodiment, both upper and lower ends of the furnace door 5 are slidably connected to the vacuum baking oven 1, and the vacuum baking oven 1 is provided with a first linear motion mechanism 6 for driving the furnace door 5 to move forward and backward and a second linear motion mechanism 7 for driving the furnace door 5 to move left and right in the direction of the adjacent furnace door 5. The first linear motion mechanism 6 drives the furnace door 5 to move forward and backward to realize the closing and opening of the furnace door 5. At the same time, after the furnace door 5 is opened, the opened furnace door 5 is misaligned with the adjacent furnace door 5, so that when the opened furnace door 5 moves in the direction of the adjacent furnace door 5, it will not be blocked by the adjacent furnace door 5; the second linear motion mechanism 7 drives the opened furnace door 5 to move left and right in the direction of the adjacent furnace door 5 to realize the left and right translation function of the furnace door 5. The above-mentioned inner push-pull furnace door 5 is adopted, so that the opening and closing of the door will not occupy additional floor space, effectively saving the floor space of the vacuum baking oven 1, and the structure is simple, the cost is lower, and the furnace door 5 is more reliable to open, which is particularly suitable for the opening and closing of large furnace doors 5.

[0085] See also Figures 8 to 15Furthermore, an upper guide groove base 8 is provided above the furnace door 5, and an upper door opening and closing guide groove 801 and an upper translation guide groove 802 are provided at the bottom of the upper guide groove base 8. The upper door opening and closing guide groove 801 and the upper translation guide groove 802 are perpendicular to and connected to each other. An upper guide wheel 501 matching the upper door opening and closing guide groove 801 and the upper translation guide groove 802 is provided on the top of the furnace door 5. The upper guide wheel 501 can make the furnace door 5 move smoothly forward and backward along the upper door opening and closing guide groove 801 under the drive of the first linear motion mechanism 6 to realize closing and opening the furnace door 5, and can make the furnace door 5 move smoothly left and right along the upper translation guide groove 802 under the drive of the second linear motion mechanism 7 to realize the left and right translation function of the furnace door 5. A floating translation guide groove 9 and a lower translation guide groove 10 are arranged below the furnace door 5. The first linear motion mechanism 6 is connected to the floating translation guide groove 9 and drives the floating translation guide groove 9 to move forward and backward so that the floating translation guide groove 9 is connected to the lower translation guide groove 10. A lower guide wheel 502 and a translation wheel 503 that cooperate with the floating translation guide groove 9 and the lower translation guide groove 10 are arranged at the bottom of the furnace door 5 corresponding to the position of the floating translation guide groove 9. The lower guide wheel 502 and the translation wheel 503 can enable the furnace door 5 to move left and right smoothly along the floating translation guide groove 9 and the lower translation guide groove 10 under the drive of the second linear motion mechanism 7. Among them, the floating translation guide groove 9 includes an inner translation guide groove 901 and an outer translation guide groove 902 which are arranged side by side front and back. The spacing between the inner translation guide groove 901 and the outer translation guide groove 902 matches the distance of the front and rear translation after the furnace door 5 is opened, so that when the furnace door 5 is opened, the inner translation guide groove 901 is connected with the lower translation guide groove 10, and when the furnace door 5 is closed, the outer translation guide groove 902 is connected with the lower translation guide groove 10. The above-mentioned floating translation guide groove 9 can enable the opened furnace door 5 to smoothly translate left and right toward the adjacent furnace door 5.

[0086] With the above-mentioned arrangement of the furnace door 5, the first linear motion mechanism 6 and the second linear motion mechanism 7 only need to overcome the friction force to open the door. The gravity of the furnace door 5 is directly transmitted to the frame of the vacuum baking furnace 1 through the wheels and the translation guide groove. The furnace door 5 will not fall off when the power is cut off and the gas is cut off for maintenance, and the safety performance is high.

[0087] See also Fig.14 , Fig.15 Furthermore, a guide wheel seat 504 is provided at the bottom of the furnace door 5 corresponding to the position of the floating translation guide groove 9, the lower guide wheel 502 is provided at the left and right ends of the guide wheel seat 504, the translation wheels 503 are arranged side by side at the bottom of the guide wheel seat 504, and the left and right ends of the guide wheel seat 504 are also provided with limiting buffer blocks 505, and the distance between the two opposing ends of the limiting buffer blocks 505 is matched with the length of the floating translation guide groove 9. The limiting buffer block 505 can make the guide wheel seat 504 of the closed furnace door 5 accurately limited on the inner translation guide groove 901 of the floating translation guide groove 9, and reduce the collision of the guide wheel seat 504.

[0088] See also Figures 10 to 13 Further, the first linear motion mechanism 6 includes an upper front-to-back motion cylinder 601 and a lower front-to-back motion cylinder 602, which are respectively fixed on the upper and lower sides of the furnace opening of the vacuum baking furnace 1, and a pushing assembly is provided at the front-to-back translation end of the upper front-to-back motion cylinder 601, and a door switch clamp 506 matched with the pushing assembly is provided at the top of the furnace door 5. The upper front-to-back motion cylinder 601 pushes the door switch clamp 506 to move forward and backward through the pushing assembly, thereby driving the furnace door 5 to move forward and backward through the door switch clamp 506, so as to close and open the furnace door 5. The front-to-back translation end of the lower front-to-back motion cylinder 602 is connected to the floating translation guide groove 9, and the lower front-to-back motion cylinder 602 drives the furnace door 5 to move forward and backward through the floating translation guide groove 9.

[0089] Specifically, the push assembly includes a first front-to-back slide rail 603 and a front-to-back push block 604. The top of the first front-to-back slide rail 603 is fixed to the bottom of the upper guide groove base 8. The bottom of the first front-to-back slide rail 603 is slidably connected to the top of the front-to-back push block 604. The bottom of the front-to-back push block 604 is provided with a door-to-door clamping groove 6041 that matches the door-to-door clamping plate 506. The left and right ends of the door-to-door clamping groove 6041 are both provided with openings for the door-to-door clamping plate 506 to enter or leave. Among them, the first front-to-back slide rail 603 can ensure that the upper front-to-back motion cylinder 601 drives the front-to-back push block 604 to move forward and backward stably. When the second linear motion mechanism 7 drives the opened furnace door 5 to translate toward the adjacent furnace door 5, the door-to-door clamping plate 506 of the furnace door 5 leaves the opening of the door-to-door clamping groove 6041; when the second linear motion mechanism 7 drives the opened furnace door 5 to translate back, the door-to-door clamping plate 506 of the furnace door 5 enters the door-to-door clamping groove 6041 from the opening.

[0090] See also Fig.12 , Fig.13 Furthermore, the lower front-to-back motion cylinder 602 is fixed to the lower side of the furnace mouth of the vacuum baking furnace 1 through the switch door base 605, and the left and right sides of the lower front-to-back motion cylinder 602 are provided with second front-to-back slide rails 606, and the bottom of the second front-to-back slide rails 606 are fixed on the switch door base 605, and the bottom of the floating translation guide groove 9 is slidably connected to the top of the second front-to-back slide rails 606. The second front-to-back slide rails 606 can ensure that the lower front-to-back motion cylinder 602 drives the floating translation guide groove 9 to move stably back and forth.

[0091] See also Fig.13Furthermore, in order to enable the lower forward and backward motion cylinder 602 to accurately drive the floating translation guide groove 9 to move forward and backward, so that when the furnace door 5 is opened, the inner translation guide groove 901 of the floating translation guide groove 9 can be aligned with the lower translation guide groove 10, and when the furnace door 5 is closed, the outer translation guide groove 902 of the floating translation guide groove 9 can be aligned with the lower translation guide groove 10, a front limit stopper 607 for limiting the maximum forward travel of the floating translation guide groove 9 and a limit stopper 608 for limiting the maximum forward travel of the floating translation guide groove 9 are provided on the door opening and closing base 605. The floating translation guide groove 9 has a rear limit block 608 at its farthest rearward stroke, and a limit block 903 is provided at the bottom of the floating translation guide groove 9 to cooperate with the front limit block 607 and the rear limit block 608. When the limit block 903 touches the front limit block 607, the inner translation guide groove 901 of the floating translation guide groove 9 is aligned with the connected lower translation guide groove 10. When the limit block 903 touches the rear limit block 608, the outer translation guide groove 902 of the floating translation guide groove 9 is aligned with the connected lower translation guide groove 10.

[0092] See also Figure 8 , Fig.12 Furthermore, the second linear motion mechanism 7 is arranged at the lower front side of the oven door 5, and the second linear motion mechanism 7 includes a driving motor 701, a translation belt 702, a translation block 703 and a translation slide rail 704. The driving motor 701 is fixed to the vacuum baking oven 1, and the rotating shaft of the driving motor 701 is connected to one end of the translation belt 702. The translation block 703 is fixed to the side of the translation belt 702 close to the oven door 5. The bottom of the translation slide rail 704 is fixed to the vacuum baking oven 1 and is located below the translation block 703. The bottom of the translation block 703 is slidably connected to the top of the translation slide rail 704. The driving motor 701 drives the translation belt 702 to rotate, so that the translation belt 702 drives the translation block 703 to translate left and right along the translation slide rail 704. The bottom of the oven door 5 is provided with a translation slot 507 for inserting the translation block 703. When the oven door 5 is opened, the driving motor 701 drives the translation block 703 to move along the translation rail 704 to the position of the translation slot 507 facing the oven door 5 through the translation belt 702, and then the first linear motion mechanism 6 drives the oven door 5 to move forward. As the oven door 5 moves forward, the translation block 703 is inserted into the translation slot 507 of the oven door 5. At this time, the driving motor 701 can drive the opened oven door 5 to move left and right in the direction of the adjacent oven door 5 through the translation block 703. The second linear motion mechanism 7 set up above has a simple structure and can smoothly drive the opened oven door 5 to move left and right in the direction of the adjacent oven door 5; at the same time, by only setting the length of the translation belt 702 according to the length of the vacuum baking oven 1, the left and right translation function of all oven doors 5 on the vacuum baking oven 1 can be realized by one power source.

[0093] See also Figure 1In a preferred embodiment, a clamp load-bearing beam 102 is provided at each of the left and right ends of the inner bottom surface of the vacuum chamber 101 for placing the baking clamp 2, and a positioning block matching the baking clamp 2 is provided on the clamp load-bearing beam 102. The positioning block can enable the baking clamp 2 to be accurately positioned in the vacuum chamber 101, so that the automatic power connection structure 4 can accurately connect the baking clamp 2 stacked in the vacuum chamber 101 to electricity.

[0094] See also Fig.16 In a preferred embodiment, the oven door 5 includes a door shell 508 and a sealing plate 509 disposed inside the door shell 508. The door shell 508 is connected to the sealing plate 509 through a plurality of elastic members 510 distributed in an array. The elastic members 510 can make the gap between the sealing plate 509 and the vacuum baking cavity consistent, with good sealing performance, ensuring that the vacuum baking cavity does not leak, with good pressure retention effect, and realizing flexible buffer door closing. At the same time, a second reflector 511 is disposed inside the sealing plate 509, which can effectively prevent heat dissipation, further shorten the preheating speed of the battery cell 3, and improve work efficiency.

[0095] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

[0096] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A multi-layer stacking baking system, characterized in that: The invention comprises a plurality of stacked vacuum baking furnaces and a plurality of baking fixtures for placing battery cells and heating the battery cells. The vacuum baking furnace is provided with a plurality of vacuum chambers arranged side by side for stacking the baking fixtures. The rear end of the vacuum chamber is provided with an automatic power connection structure matched with the static power contact of the baking fixture. A furnace door is provided at the opening of each vacuum chamber. The vacuum chamber matches with the corresponding furnace door to form a sealing structure. When the oven door is closed, the movable electric contact of the automatic power connection structure is engaged with the static electric contact of the baking fixture; when the oven door is opened, the movable electric contact of the automatic power connection structure is separated from the static electric contact of the baking fixture; The automatic power connection structure includes a moving contact back plate and an upper front-to-back translation guide mechanism and a lower front-to-back translation guide mechanism symmetrically arranged at the upper and lower ends of the moving contact back plate. The front side of the moving contact back plate is provided with a plurality of moving electric contacts that match the static electric contacts of the corresponding baking clamps stacked in the vacuum chamber. The upper front-to-back translation guide mechanism and the lower front-to-back translation guide mechanism match the closing and opening of the corresponding oven door to drive the moving contact back plate to translate forward or backward, thereby realizing the engagement or separation of the moving electric contacts on the moving contact back plate with the static electric contacts on the baking clamps. The upper front-to-back translation guide mechanism includes a first horizontal guide rod, a first connecting rod, a first fixed seat and a first floating seat, one end of the first horizontal guide rod extends to the outside of the opening of the vacuum chamber, the other end of the first horizontal guide rod passes through the upper end of the moving contact back plate and is hinged to the upper end of the first connecting rod, the moving contact back plate is slidably connected to the first horizontal guide rod and can move forward and backward along the first horizontal guide rod, the middle end of the first connecting rod is hinged to one end of the first fixed seat, the other end of the first fixed seat is fixed to the vacuum chamber, the lower end of the first connecting rod is hinged to one end of the first floating seat, and the other end of the first floating seat is fixed to the upper end of the back side of the moving contact back plate; A first spring positioning ring is provided at one end of the first horizontal guide rod close to the moving contact back plate, and the first spring positioning ring is located at the front side of the moving contact back plate, a first return spring is provided between the first spring positioning ring and the moving contact back plate, the first return spring is sleeved on the first horizontal guide rod, and two ends of the first return spring are respectively in contact with the first spring positioning ring and the moving contact back plate; The lower front-to-back translation guide mechanism includes a second horizontal guide rod, a second connecting rod, a second fixed seat and a second floating seat, one end of the second horizontal guide rod extends to the outside of the opening of the vacuum chamber, the other end of the second horizontal guide rod passes through the lower end of the moving contact back plate and is hinged to the lower end of the second connecting rod, the moving contact back plate is slidably connected to the second horizontal guide rod and can move forward and backward along the second horizontal guide rod, the middle end of the second connecting rod is hinged to one end of the second fixed seat, the other end of the second fixed seat is fixed to the vacuum chamber, the upper end of the second connecting rod is hinged to one end of the second floating seat, and the other end of the second floating seat is fixed to the lower end of the back side of the moving contact back plate; A second spring positioning ring is provided at one end of the second horizontal guide rod close to the moving contact back plate, and the second spring positioning ring is located on the front side of the moving contact back plate, a second return spring is provided between the second spring positioning ring and the moving contact back plate, the second return spring is sleeved on the second horizontal guide rod, and two ends of the second return spring are respectively abutted against the second spring positioning ring and the moving contact back plate.

2. The multi-layer stacking baking system according to claim 1, characterized in that: The baking clamp includes a clamp frame and a heating base plate laid on the inner bottom end of the clamp frame, the four outer corners of the clamp frame are provided with positioning supports, the top of the positioning support is provided with a first positioning member, the bottom of the positioning support is provided with a second positioning member matched with the first positioning member, a PCB signal board is provided at the rear of the clamp frame, the heating base plate is electrically connected to the PCB signal board, and the rear of the PCB signal board is provided with static electrical contacts electrically connected to the moving electrical contacts of the automatic power connection structure.

3. The multi-layer stacking baking system according to claim 1, characterized in that: The upper and lower ends of the furnace door are slidably connected to the vacuum baking furnace. The vacuum baking furnace is provided with a first linear motion mechanism for driving the furnace door to move forward and backward and a second linear motion mechanism for driving the furnace door to move left and right toward the adjacent furnace door.

4. The multi-layer stacking baking system according to claim 3, characterized in that: An upper guide groove base is arranged above the furnace door, and an upper switch door guide groove and an upper translation guide groove are arranged at the bottom of the upper guide groove base, the upper switch door guide groove and the upper translation guide groove are perpendicular to and connected with each other, an upper guide wheel matching with the upper switch door guide groove and the upper translation guide groove is arranged on the top of the furnace door, a floating translation guide groove and a lower translation guide groove are arranged below the furnace door, the first linear motion mechanism is connected with the floating translation guide groove and drives the floating translation guide groove to move forward and backward so that the floating translation guide groove is connected with the lower translation guide groove, and a lower guide wheel and a translation wheel matching with the floating translation guide groove and the lower translation guide groove are arranged at the bottom of the furnace door corresponding to the position of the floating translation guide groove.

5. The multi-layer stacking baking system according to claim 4, characterized in that: The floating translation guide groove includes an inner translation guide groove and an outer translation guide groove arranged side by side front to back. The spacing between the inner translation guide groove and the outer translation guide groove matches the distance of the front and rear translation after the furnace door is opened. When the furnace door is opened, the inner translation guide groove is connected with the lower translation guide groove; when the furnace door is closed, the outer translation guide groove is connected with the lower translation guide groove.

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