Baking equipment and production line

Abstract

The utility model relates to the technical field of battery cells, and provides baking equipment and a production line, the baking equipment comprises a baking container and a valve opening device, and the baking container comprises a baking cavity for accommodating the battery cells; the valve opening device comprises a machine frame, a first cam and a driving mechanism, the machine frame comprises a frame body and a valve opening piece connected with the frame body, the first cam abuts against the frame body, the driving mechanism comprises a driving shaft, the driving shaft is connected with the first cam, and the driving shaft drives the first cam to rotate so that the first cam can push the machine frame to move downwards from the initial position to the valve opening position. Under the condition that a switch valve of a battery cell needs to be opened, the driving shaft drives the first cam to rotate, rotation of the driving shaft is converted into linear motion of the rack through the first cam, the rack drives the valve opening piece to move downwards from the initial position to the valve opening position, and therefore the switch valve is opened, and the valve opening action is completed. The problem that a switch valve of a battery cell is difficult to open in a baking cavity is solved.

Description

Technical Field

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

[0002] The application of battery cells in life and production is becoming more and more extensive. For example, new energy vehicles equipped with batteries have been widely used, and batteries can be used to provide power for new energy vehicles in whole or in part. In addition, batteries are also increasingly used in the field of energy storage, etc.

[0003] During the production process of batteries, the battery cells need to be placed in a baking chamber for baking to reduce the water content of the battery cells. In the related art, it is difficult to open the switch valve of the battery cells in the baking chamber. Utility Model Content

[0004] In view of this, the embodiments of the present application hope to provide a baking device and a production line that can open the switch valve of the battery cell.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0006] An embodiment of the present application provides a baking device, comprising:

[0007] A baking container, comprising a baking cavity for accommodating the battery cell;

[0008] The valve opening device comprises a frame, a first cam and a driving mechanism;

[0009] The frame is arranged in the baking chamber, and comprises a frame body and a valve opening member connected to the frame body;

[0010] The first cam is disposed in the baking chamber and abuts against the frame;

[0011] The driving mechanism includes a driving shaft and a power source, the power source is connected to the driving shaft, the driving shaft is connected to the first cam, and the power source drives the driving shaft to drive the first cam to rotate, so that the first cam pushes the frame to move downward from an initial position to an open valve position.

[0012] When it is necessary to open the switch valve of the battery cell, the driving shaft drives the first cam to rotate, and the first cam converts the rotation of the driving shaft into linear motion of the frame, and the frame drives the valve opening member to move downward from the initial position to the valve opening position, thereby opening the switch valve and completing the valve opening action, thereby solving the problem that it is difficult to open the switch valve of the battery cell in the baking chamber.

[0013] In some embodiments, the baking equipment includes a clamp, the valve opening device includes an elastic member, the elastic member connects the frame and the clamp, and the elastic force of the elastic member resets the frame from the valve opening position to the initial position.

[0014] The frame is driven to return to the initial position by the elastic force of the elastic member, and the elastic member can keep the first cam in contact with the frame body, so the reliability is high.

[0015] In some embodiments, the baking device includes a power supply probe plate and a commutator, the commutator is transmission-connected to the power supply probe plate, the drive shaft is connected to the commutator, and the drive shaft drives the commutator to rotate so that the power supply probe plate performs linear reciprocating motion in the up and down directions.

[0016] On the one hand, the rotation of the drive shaft is converted into a linear reciprocating motion of the power supply probe plate in the up and down direction by the commutator, thereby realizing the change of motion mode and direction. On the other hand, the commutator and the first cam are driven by the same driving mechanism, which can reduce the driving source, save structural parts and reduce costs.

[0017] In some embodiments, the baking device includes a fixture, and the power supply probe board is located on the top of the fixture.

[0018] In this way, the power supply probe plate is located at a higher position so as to facilitate contact with the power-taking contacts of the fixture to be energized.

[0019] In some embodiments, a portion of the lower surface of the valve opening member is recessed to form a ventilation groove.

[0020] When the frame is in the valve-opening position, the valve-opening member opens the switch valve, and the ventilation groove can prevent the lower surface of the valve-opening member from blocking the valve port of the switch valve, so that the internal cavity of the battery cell is connected with the baking cavity, so that the air pressure of the internal cavity of the battery cell can be consistent with the air pressure in the baking cavity.

[0021] In some embodiments, the ventilation groove includes a first sub-groove and a second sub-groove, and the first sub-groove and the second sub-groove intersect.

[0022] The first sub-groove and the second sub-groove can enrich the airflow path and improve ventilation reliability.

[0023] In some embodiments, the frame includes a pressure rod and a connecting rod, the pressure rod extends along a first direction, and a plurality of the pressure rods are arranged at intervals along a second direction to form a first unit, each of the pressure rods is connected to a valve opening member below, and the connecting rod extends along the second direction to connect a plurality of pressure rods of the first unit, wherein the first direction, the second direction, and the up-down direction are perpendicular to each other.

[0024] The multiple pressure rods are connected into a whole through the connecting rod, and the weight of the frame is light. A valve opening member is connected to the bottom of each pressure rod, and multiple pressure rods correspond to multiple valve opening members. In this way, each time the first cam pushes the frame downward to the valve opening position, the switch valves of multiple battery cells can be opened, thereby improving efficiency.

[0025] In some embodiments, the frame includes a connecting column, and the plurality of first units are arranged in layers and at intervals along the up-down direction; the connecting column extends along the up-down direction to connect the compression rods of the plurality of first units.

[0026] The multiple first units are connected by connecting columns, so that the entire frame has a multi-layer frame structure. For example, the space under each first unit can be used to place a layer of battery cells, and multiple first units can be used to place multiple layers of battery cells arranged in layers in the vertical direction. In this way, the frame can accommodate multiple battery cells distributed in an array, and the switch valves of more battery cells can be opened at one time, further improving efficiency.

[0027] In some embodiments, the height of the driving shaft is higher than the height of the frame, a column is disposed on the top surface of the frame, and the first cam abuts against the top surface of the column.

[0028] This design can adapt the height of the drive shaft without excessively increasing the overall height of the frame, so that the drive shaft can simultaneously drive the frame and the power supply probe board to rise and fall.

[0029] In some embodiments, there are multiple first cams, and the multiple first cams are arranged at intervals along the axial direction of the drive shaft.

[0030] By having a plurality of first cams abut against the frame body and push the frame to descend, not only can the vibration of the driving shaft be reduced, but also the overall driving frame body can be smoothly descended.

[0031] In some embodiments, the power source is disposed outside the baking container, and a portion of the driving shaft is disposed in the baking cavity.

[0032] In this way, not only can the power source be prevented from occupying the limited space in the baking chamber, but also the environment in the baking chamber can be prevented from affecting the operation of the power source and causing damage to the power source, thereby improving the operating efficiency of the equipment.

[0033] Another aspect of an embodiment of the present application provides a production line for producing battery cells, comprising any of the baking devices described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the structure of a baking device provided in one embodiment of the present application;

[0035] Figure 2 for Figure 1A schematic diagram of the structure of the portion shown;

[0036] Figure 3 for Figure 1 A schematic diagram of the structure of the middle frame and the elastic member;

[0037] Figure 4 for Figure 3 A structural diagram of the middle rack from another perspective;

[0038] Figure 5 for Figure 4 The enlarged schematic diagram at A in the middle;

[0039] Figure 6 Schematic diagram of the structure of the first cam in one embodiment of the present application.

[0040] Description of Reference Numerals

[0041] Frame 1; frame body 11; pressure rod 111; first unit 1110; connecting rod 112; connecting column 113; platform column 114; valve opening member 12; ventilation groove 12a; first sub-groove 12aa; second sub-groove 12ab;

[0042] First cam 2; convex portion 2a; base circular surface 2b; pushing surface 2c;

[0043] Driving mechanism 3; driving shaft 31;

[0044] Elastic member 4;

[0045] Power supply probe board 100;

[0046] Take the electrical contact 200. DETAILED DESCRIPTION

[0047] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0049] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0050] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0051] Below, this application is described in detail.

[0052] The baking equipment and production line provided in the embodiments of the present application are both used for the production of the battery of the present application. In order to make the baking equipment and production line of the present application clear, the battery of the present application is first introduced before describing the baking equipment and production line of the present application.

[0053] The battery provided in the embodiments of the present application can be used alone. The battery can also be used in groups as a battery pack. The battery and the battery pack can be used in, but not limited to, electrical devices. Electrical devices include, but are not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, electric vehicles, vehicles, ships, or spacecraft. Among them, spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0054] Taking the example of a vehicle as an electrical device in one embodiment of the present application, the vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery is provided inside the vehicle, and the battery may be provided at the bottom of the vehicle or at the front or rear of the vehicle. The battery can be used to power the vehicle, for example, the battery can be used as an operating power source for the vehicle. In some embodiments, the battery can be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0055] The battery may be a lithium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, or a lithium-sulfur battery, etc., which is not limited in the embodiments of the present application.

[0056] The battery includes at least one battery cell. The battery cell is the energy storage component of the battery. The battery also includes a battery monitoring and management device for monitoring the power level of the battery cell.

[0057] In a battery, there can be multiple cells, which can be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple cells are connected in series and in parallel. Multiple cells can be directly connected in series, in parallel, or in mixed connection; of course, the battery can also be a battery module formed by connecting multiple cells in series, in parallel, or in mixed connection, and then multiple battery modules are connected in series, in parallel, or in mixed connection to form a whole.

[0058] In the embodiment of the present application, the battery cell may be a secondary battery cell, which refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0059] The battery cell may be a cylindrical battery cell, a prismatic battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell or a multi-prismatic battery cell, and the multi-prismatic battery cell is, for example, a hexagonal battery cell, etc., and there is no particular limitation in the present application.

[0060] The inner cavity of the battery cell is used to place the electrode assembly and the electrolyte. For example, the battery cell includes a shell, an electrode assembly and an electrolyte, and the electrode assembly and the electrolyte are placed in the shell. The shell is used to encapsulate components such as the electrode assembly and the electrolyte.

[0061] The battery cell provided in the embodiment of the present application also includes a switch valve, which is used to open and close the internal cavity of the battery cell. The internal cavity of the battery cell, that is, the internal cavity of the shell, is used to accommodate the electrode assembly and the electrolyte. In the production process of the battery, before filling the liquid, the battery cell needs to be placed in the baking cavity of the baking container for baking to ensure the dryness of the internal cavity of the battery cell. In order to reduce the entry of air into the internal cavity of the battery cell, the baking process needs to be carried out in a vacuum environment. The interior of the baking container is in a vacuum state. Therefore, it is necessary to solve how to open the switch valve of the battery cell in the baking cavity in a vacuum environment for vacuuming and baking.

[0062] An embodiment of the present application provides a baking device, which includes a baking container and a valve opening device.

[0063] The baking container comprises a baking cavity for accommodating the battery core. The battery core is baked in the baking cavity to reduce the water content of the battery core.

[0064] See also Figures 1 to 4 , the valve opening device includes a frame 1, a first cam 2 and a driving mechanism 3. The frame 1 is arranged in the baking chamber, and the frame 1 includes a frame body 11 and a valve opening member 12 connected to the frame body 11. The first cam 2 is arranged in the baking chamber and abuts against the frame body 11. The driving mechanism 3 includes a driving shaft 31 and a power source, the power source is connected to the driving shaft 31, the driving shaft 31 is connected to the first cam 2, and the power source drives the driving shaft 31 to drive the first cam 2 to rotate, so that the first cam 2 pushes the frame 1 to move downward from the initial position to the valve opening position. When the frame 1 is in the valve opening position, the valve opening member 12 opens the switch valve of the battery cell. That is to say, the valve opening member 12 is located above the battery cell, and the frame 1 moves downward under the action of the driving mechanism 3 and the first cam 2 so that the valve opening member 12 moves downward close to the battery cell, and when the frame 1 descends to the valve opening position, the valve opening member 12 can contact and open the switch valve of the battery cell.

[0065] In the baking equipment provided in the embodiment of the present application, when it is necessary to open the switch valve of the battery cell, the driving shaft 31 drives the first cam 2 to rotate, and the first cam 2 converts the rotation of the driving shaft 31 into a linear motion of the frame 1, and the frame 1 drives the valve opening member 12 to move downward from the initial position to the valve opening position, thereby opening the switch valve and completing the valve opening action, thereby solving the problem that it is difficult to open the switch valve of the battery cell in the baking chamber.

[0066] In some embodiments, the switch valve may be a normally closed switch valve. A normally closed switch valve means that the switch valve remains closed when no external force is applied. In the battery production process, the battery cell undergoes a baking process before undergoing a liquid injection process; during the baking process, the normally closed switch valve may be opened by a valve opening device provided in the baking equipment, and after the vacuuming of the baking process is completed, the switch valve may be closed before breaking the vacuum, so that the internal cavity of the battery cell remains in a vacuum state before entering the liquid injection process.

[0067] The power source is used to provide power. In some embodiments, see Figure 1 The power source is a motor. The motor and the frame 1 are located on opposite sides of the power supply probe board 100 . One end of the driving shaft 31 is connected to the motor shaft of the motor, and the other end of the driving shaft 31 extends to the top of the frame 11 .

[0068] Since the space in the baking cavity is limited, it is not possible to accommodate more equipment, and during the baking process, the inside of the baking cavity is in a high temperature state, which is easy to cause damage to the equipment. In one embodiment, the power source is arranged outside the baking container, and part of the drive shaft 31 is arranged inside the baking cavity. In this way, it can not only prevent the power source from occupying the limited space in the baking cavity, but also prevent the environment in the baking cavity from affecting the operation of the power source and causing damage to the power, which can improve the operating efficiency of the equipment.

[0069] Understandably, see Figure 1 , Figure 3 and Figure 6 , the outer circumference of the first cam 2 abuts against the frame 11, and the driving shaft 31 can be rotated to make different parts of the outer circumference of the first cam 2 contact the frame 11, so as to push the frame 1 to perform linear reciprocating motion. In some embodiments, the distance between the raised part 2a of the outer circumference of the first cam 2 and its rotation axis is greater than the distance between other parts of the outer circumference of the first cam 2 and its rotation axis. In this way, different parts of the outer circumference of the first cam 2 abut against the frame 11, pushing the frame 1 to complete the reciprocating movement between the initial position and the valve opening position.

[0070] For some examples, see Figure 1 , Figure 3 and Figure 6, the outer peripheral surface of the first cam 2 includes a base circular surface 2b and a push surface 2c connected to the base circular surface 2b, and the maximum distance between the push surface 2c and the rotation axis of the first cam 2 is greater than the distance between the base circular surface 2b and the rotation axis of the first cam 2. In other words, taking the plane perpendicular to the rotation axis of the first cam 2 as the projection surface, the projection line of the push surface 2c is a curve, the projection line of the base circular surface 2b is an arc line, and the maximum distance between the projection line of the push surface 2c and the rotation axis of the first cam 2 is greater than the distance between the projection line of the base circular surface 2b and the rotation axis of the first cam 2. The raised portion 2a is a part of the push surface 2c. During the rotation of the first cam 2, the base circular surface 2b and the push surface 2c are respectively in contact with the frame 11 to push the frame 1 to reciprocate between the initial position and the valve opening position.

[0071] For some examples, see Figure 1 and Figure 2 , the first cam 2 is disposed on the driving shaft 31, and the driving shaft 31 and the first cam 2 are coaxial. In other words, the rotation axis of the driving shaft 31 coincides with the rotation axis of the first cam 2.

[0072] For some examples, see Figures 1 to 3 The baking device includes a clamp, the valve opening device includes an elastic member 4, the elastic member 4 connects the frame 11 and the clamp, and the elastic force of the elastic member 4 enables the frame 1 to reset from the valve opening position to the initial position. The clamp is used to clamp the battery cell.

[0073] For example, the clamp holds the battery cell in the baking chamber and keeps it still. The first cam 2 rotates so that the raised portion 2a abuts against the frame 11, so as to push the frame 1 downward from the initial position to the valve opening position, and the elastic member 4 undergoes elastic deformation. The first cam 2 rotates so that the raised portion 2a avoids the frame 11, and the frame 11 is no longer subjected to the force exerted by the raised portion 2a. The elastic member 4 recovers the elastic deformation and generates an elastic force to reset the frame 1 from the valve opening position to the initial position. In this way, the elastic force of the elastic member 4 is used to drive the frame 1 to reset to the initial position, and the elastic member 4 can keep the first cam 2 in contact with the frame 11, which has high reliability.

[0074] The type of the elastic member 4 is not limited. For example, the type of the elastic member 4 includes but is not limited to a spring.

[0075] For some examples, see Figure 3 The number of elastic members 4 can be multiple. Multiple elastic members 4 can not only reduce the force of a single elastic member 4 and increase the service life of the elastic member 4, but also make the frame 11 balanced, so that each part of the frame 11 can be smoothly raised and reset, avoiding the situation of local skewness caused by uneven force on the frame 11.

[0076] In some embodiments, the clamp includes a heating plate, which can apply a clamping force to the battery cell to clamp the battery cell. When the heating plate is powered on, it generates heat and transfers the heat to the battery cell to bake the battery cell.

[0077] For some examples, see Figure 1 and Figure 2 The baking equipment includes a power supply probe plate 100 and a commutator, the commutator is connected to the power supply probe plate 100 by transmission, the drive shaft 31 is connected to the commutator, and the drive shaft 31 drives the commutator to rotate so that the power supply probe plate 100 performs linear reciprocating motion in the up and down directions. On the one hand, the rotation of the drive shaft 31 is converted into a linear reciprocating motion of the power supply probe plate 100 in the up and down directions by the commutator, thereby realizing a change in motion mode and direction. On the other hand, the commutator and the first cam 2 are both driven by the same drive mechanism 3, which can reduce the drive source, save structural parts, and reduce costs.

[0078] In some embodiments, the switching element is a second cam, and the second cam abuts against the power supply probe card 100. The driving shaft 31 drives the second cam to rotate, so that the power supply probe card 100 performs a linear reciprocating motion in the up-and-down direction.

[0079] Exemplarily, the second cam may be coaxial with the drive shaft 31. That is, the rotation axis of the second cam coincides with the rotation axis of the drive shaft 31.

[0080] For some examples, see Figure 1 and Figure 2 , the power supply probe plate 100 makes a linear reciprocating motion in the up-down direction to contact or separate from the power supply contact 200 of the fixture. Exemplarily, the power supply contact 200 is electrically connected to the heating plate. The power supply probe plate 100 contacts the power supply contact 200 of the fixture to achieve power-on, and the heating plate of the fixture heats up to bake the battery cell. The power supply probe plate 100 separates from the power supply contact 200 of the fixture to achieve power-off, and the heating plate stops heating.

[0081] The material of the board body of the power supply probe board 100 may be bakelite, which is phenolformaldehyde plastic (PF) and has high mechanical strength, good insulation, heat resistance and corrosion resistance.

[0082] Exemplarily, in one embodiment, the distance between the base circular surface 2b and the rotation axis of the first cam 2 is 15mm, and the maximum distance between the push surface 2c and the rotation axis of the first cam 2 is 20mm. When the base circular surface 2b abuts against the frame body 11, the frame 1 is in the initial position, and the power supply probe plate 100 is also in a state of being separated from the power supply contact 200. When it is necessary to open the switch valve, the drive shaft 31 rotates forward and drives the first cam 2 to rotate forward. The first cam 2 pushes the frame 1 to move downward and the power supply probe plate 100 moves downward synchronously until the most protruding part of the push surface 2c abuts against the frame 1. At this time, the frame 1 moves downward by 5mm to reach the valve opening position, and the power supply probe plate 100 contacts the power supply contact 200. When the switch valve needs to be closed before breaking the vacuum, the drive shaft 31 can rotate in the opposite direction and drive the first cam 2 to rotate in the opposite direction. The frame 1 moves upward under the elastic force of the elastic member 4 and the power supply probe plate 100 moves upward synchronously until the base circular surface 2b abuts against the frame 1. At this time, the frame 1 moves upward 5 mm and returns to the initial position, and the power supply probe plate 100 is separated from the power supply contact 200.

[0083] For some examples, see Figure 1 and Figure 2 The baking device includes a fixture, and the power supply probe plate 100 is located on the top of the fixture. Specifically, the power supply contact 200 is located below the power supply probe plate 100, and the power supply probe plate 100 moves downward to contact with the power supply contact 200 for power supply. In this way, the power supply probe plate 100 is located higher to facilitate contact with the power supply contact 200 of the fixture for power supply.

[0084] For some examples, see Figure 1 , Figure 4 and Figure 5 , the lower surface of the valve opening member 12 is partially recessed to form a ventilation groove 12a. For example, when the frame 1 is in the valve opening position, the valve opening member 12 opens the switch valve, and the ventilation groove 12a can prevent the lower surface of the valve opening member 12 from blocking the valve port of the switch valve, so that the internal cavity of the battery cell is connected to the baking cavity, so that the air pressure of the internal cavity of the battery cell can be consistent with the air pressure in the baking cavity. In the case where the internal cavity of the battery cell needs to be evacuated, the gas in the baking cavity can be sucked by the pump group to evacuate the internal cavity of the battery cell.

[0085] Exemplarily, in some embodiments, the vent groove 12a is defined by a convex rib on the lower surface of the valve opening member 12, and the convex rib is used to push the valve core of the switch valve to open the switch valve, and the valve port of the switch valve is connected to the vent groove 12a.

[0086] For some examples, see Figure 5The ventilation groove 12a includes a first sub-groove 12aa and a second sub-groove 12ab, and the first sub-groove 12aa and the second sub-groove 12ab intersect each other. The first sub-groove 12aa and the second sub-groove 12ab can enrich the airflow path and improve the ventilation reliability.

[0087] Exemplarily, the intersection where the first sub-groove 12aa and the second sub-groove 12ab intersect corresponds to the switch valve. That is, the convex rib at the intersection pushes the valve core of the switch valve, and the projection of the valve port on the valve opening member 12 coincides with the intersection where the first sub-groove 12aa and the second sub-groove 12ab intersect. In this way, the internal cavity of the battery cell can be kept in communication with the baking cavity while satisfying the valve opening, and the air pressure of the internal cavity of the battery cell is consistent with the air pressure in the baking cavity.

[0088] In some embodiments, the valve opening member 12 is a flexible member. The valve opening member 12 can be slightly deformed under the force of the switch valve, so that the valve opening member 12 can not only push the switch valve open, but also avoid scratching the valve opening member 12 by slightly deforming. Exemplarily, the valve opening member 12 can be made of elastic and high temperature resistant material, such as silicone and / or rubber material.

[0089] For some examples, see Figures 1 to 4 The frame 11 includes a pressure rod 111 and a connecting rod 112. The pressure rod 111 extends in a first direction. A plurality of pressure rods 111 are arranged at intervals in a second direction to form a first unit 1110. A valve opening member 12 is connected to the bottom of each pressure rod 111. The connecting rod 112 extends in the second direction to connect a plurality of pressure rods 111 of the first unit 1110, wherein the first direction, the second direction and the up-down direction are perpendicular to each other. The plurality of pressure rods 111 are connected into a whole by the connecting rod 112, and the deadweight of the frame 11 is relatively light. A valve opening member 12 is connected to the bottom of each pressure rod 111, and a plurality of pressure rods 111 correspond to a plurality of valve opening members 12. In this way, each time the first cam 2 pushes the frame 1 downward to the valve opening position, the switch valves of a plurality of battery cells can be opened to improve efficiency.

[0090] For some examples, see Figures 1 to 4 The frame 11 includes a connecting column 113, and a plurality of first units 1110 are arranged in layers and at intervals in the up-down direction; the connecting column 113 extends in the up-down direction to connect the pressure rods 111 of the plurality of first units 1110. The plurality of first units 1110 are connected by the connecting column 113, so that the entire frame 11 has a multi-layer frame structure. Exemplarily, a layer of battery cells can be placed in the space below each first unit 1110, and a plurality of first units 1110 can be placed in a plurality of layers of battery cells arranged in layers in the up-down direction. In this way, the frame 11 can accommodate a plurality of battery cells distributed in an array, and the switch valves of more battery cells can be opened at one time, further improving efficiency.

[0091] For some examples, see Figures 1 to 4 , the plurality of compression rods 111 of the first unit 1110 may be connected by a plurality of connecting rods 112. The plurality of first units 1110 may be connected by a plurality of connecting columns 113. In this way, the overall structural stability and structural strength of the frame 11 are improved.

[0092] For some examples, see Figure 3 The elastic member 4 can connect the pressure rod 111 and the clamp, and each pressure rod 111 is provided with an elastic member 4 at both ends along the first direction. On the one hand, the elastic member 4 applies an upward elastic force to both ends of each pressure rod 111 along the first direction to lift the entire frame 1, and the frame 1 can rise smoothly; on the other hand, the elastic member 4 can be prevented from interfering with the valve opening member 12 to contact and open the switch valve.

[0093] For some examples, see Figures 1 to 4 The height of the driving shaft 31 is higher than the height of the frame 11, and a column 114 is provided on the top surface of the frame 11, and the first cam 2 abuts against the top surface of the column 114. In this design, the height of the driving shaft 31 can be adapted without excessively increasing the overall height of the frame 11, so that the driving shaft 31 can simultaneously drive the frame 1 and the power supply probe board 100 to rise and fall.

[0094] In one embodiment, please refer to Figures 1 to 4 The number of the first cams 2 is multiple, and the multiple first cams 2 are spaced apart along the axial direction of the driving shaft 31. The multiple first cams 2 abut the frame 11 together and push the frame 1 down, which can not only reduce the shaking of the driving shaft 31, but also facilitate the overall stable descent of the driving frame 11.

[0095] For example, in some embodiments, please refer to Figures 1 to 4 , the first cams 2 are arranged in one-to-one correspondence with the pillars 114. Taking the case where the number of the first cams 2 is two, the number of the pillars 114 is two, and each first cam 2 abuts against one pillar 114. In this way, the size of the pillars 114 can be small to avoid excessive increase in the total weight of the frame 1 as much as possible.

[0096] The present application also provides a production line for producing batteries, wherein the production line includes the baking device in any one of the embodiments of the present application.

[0097] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and description of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A baking device, characterized in that: include: A baking container, comprising a baking cavity for accommodating the battery cell; The valve opening device comprises a frame, a first cam and a driving mechanism; The frame is arranged in the baking chamber, and comprises a frame body and a valve opening member connected to the frame body; The first cam is disposed in the baking chamber and abuts against the frame; The driving mechanism includes a driving shaft and a power source, the power source is connected to the driving shaft, the driving shaft is connected to the first cam, and the power source drives the driving shaft to drive the first cam to rotate, so that the first cam pushes the frame to move downward from an initial position to an open valve position.

2. The baking device according to claim 1, characterized in that: The baking equipment comprises a clamp, the valve opening device comprises an elastic member, the elastic member connects the frame and the clamp, and the elastic force of the elastic member enables the frame to reset from the valve opening position to the initial position.

3. The baking device according to claim 1, characterized in that: The baking device includes a power supply probe plate and a commutator, the commutator is transmission-connected to the power supply probe plate, the drive shaft is connected to the commutator, and the drive shaft drives the commutator to rotate so that the power supply probe plate performs linear reciprocating motion in the up and down directions.

4. The baking device according to claim 3, characterized in that: The baking device includes a fixture, and the power supply probe board is located on the top of the fixture.

5. The baking device according to claim 1, characterized in that: A portion of the lower surface of the valve opening member is recessed to form a ventilation groove.

6. The baking device according to claim 5, characterized in that: The ventilation groove includes a first sub-groove and a second sub-groove, and the first sub-groove and the second sub-groove intersect.

7. The baking device according to claim 1, characterized in that: The frame includes a pressure rod and a connecting rod, the pressure rod extends along a first direction, and a plurality of the pressure rods are arranged at intervals along a second direction to form a first unit, a valve opening member is connected below each of the pressure rods, and the connecting rod extends along the second direction to connect a plurality of pressure rods of the first unit, wherein the first direction, the second direction and the up-down direction are perpendicular to each other.

8. The baking device according to claim 7, characterized in that: The frame body comprises a connecting column, and a plurality of the first units are arranged in layers and at intervals in the up-down direction; the connecting column extends in the up-down direction to connect the compression rods of the plurality of the first units.

9. The baking device according to claim 1, characterized in that: The height of the driving shaft is higher than the height of the frame body. A column is disposed on the top surface of the frame body, and the first cam abuts against the top surface of the column.

10. The baking device according to any one of claims 1 to 9, characterized in that: There are a plurality of first cams, and the plurality of first cams are arranged at intervals along the axial direction of the drive shaft.

11. The baking device according to any one of claims 1 to 9, characterized in that: The power source is arranged outside the baking container, and part of the driving shaft is arranged in the baking cavity.

12. A production line for producing battery cells, characterized in that: The invention comprises the baking equipment according to any one of claims 1 to 11.

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