Battery baking tray and apparatus

Abstract

The utility model relates to battery manufacturing technical field especially, more particularly to a kind of battery baking tray and equipment, including tray main body, and gas path and circuit being set on tray main body, tray main body includes bearing surface;Gas path has gas outlet and suction port, gas outlet is configured as and communicates with negative pressure gas source, suction port is configured as and communicates with the liquid injection hole of battery;Circuit has terminal assembly, and terminal assembly includes positive contact point and negative contact point, positive contact point is configured as and the positive pole column of battery electric connection, negative contact point is configured as and the negative pole column of battery electric connection;Suction port is formed in bearing surface;Positive contact point and negative contact point are exposed to bearing surface. At least solved the mode of battery baking in the related art, cannot effectively exclude the water vapor in battery, leading to the problem of battery internal return humidity after cooling.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a battery baking tray and equipment. Background Technology

[0002] Currently, the industry is still in a state of continuous advancement in baking equipment. Baking equipment is mainly used to bake the moisture in battery cells. Only after the battery cells have been baked can processes such as liquid injection be carried out. Baking is very important because it can remove moisture from the inside of the battery cells due to coating processes or carried by the air. In order to maximize the performance of the battery cells, the water content test must be qualified. Therefore, baking is very important.

[0003] Existing baking technologies, which use an electrically powered heating plate to conduct heat to the battery, have low heating efficiency. Furthermore, they cannot effectively remove the moisture generated during heating inside the battery, leading to moisture re-entry after the battery has cooled down. Summary of the Invention

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problem that the battery baking method in the related technology cannot effectively remove the moisture inside the battery, resulting in the battery becoming damp after cooling, and to provide a battery baking tray and device.

[0005] In a first aspect, this utility model provides a battery baking tray, comprising: a tray body, the tray body including a bearing surface; an air passage disposed on the tray body; the air passage having an air outlet and an air extraction port, the air outlet being configured to communicate with a negative pressure air source, and the air extraction port being configured to communicate with the electrolyte filling hole of the battery; and a circuit disposed on the tray body; the circuit having a terminal assembly, the terminal assembly including a positive electrode contact point and a negative electrode contact point, the positive electrode contact point being configured to be electrically connected to the positive electrode post of the battery, and the negative electrode contact point being configured to be electrically connected to the negative electrode post of the battery; wherein the air extraction port is disposed on the bearing surface; and both the positive electrode contact point and the negative electrode contact point are exposed on the bearing surface.

[0006] In one embodiment of this utility model, there are multiple air extraction ports and multiple terminal assemblies, and the number of air extraction ports is the same as the number of terminal assemblies.

[0007] In one embodiment of the present invention, a limiting structure is further included, disposed on the bearing surface; the limiting structure has a slot configured to be inserted into the battery casing of the battery.

[0008] In one embodiment of the present invention, the bearing surface of the tray body is recessed to form a groove, the groove being configured to accommodate the positive and negative terminals of the battery, wherein one of the terminal assemblies and one of the air extraction ports are disposed within the groove; a support block is disposed within the groove, the support block being configured to support the first wall of the battery.

[0009] In one embodiment of this utility model, both the air passage and the circuit are built into the tray body.

[0010] In one embodiment of the present invention, it further includes: a negative pressure suction nozzle, one end of which is inserted into the air extraction port and is sealed to the air extraction port; the other end of which is configured to be sealed to the liquid injection hole.

[0011] In one embodiment of this utility model, the terminal assembly further includes a spring-type probe, and both the positive electrode contact point and the negative electrode contact point are electrically connected to the spring-type probe.

[0012] In one embodiment of this utility model, the tray body includes a first part and a second part disposed opposite to each other. An air passage is formed inside the first part, and the air passage is the air passage. The side of the first part facing away from the second part is the bearing surface. The side of the first part opposite to the bearing surface is a first mounting surface, and the side of the second part facing the first part is a second mounting surface. An accommodating space is formed between the first mounting surface and the second mounting surface. The circuit also includes a wire electrically connected to the terminal assembly, and the wire is housed in the accommodating space. The terminal assembly is disposed in the first part.

[0013] In one embodiment of this utility model, the tray body is further provided with a temperature sensor; the temperature sensor is configured to contact the outer casing of the battery to collect the temperature data of the outer casing.

[0014] Secondly, this utility model also provides a battery baking device, including an oven and a battery baking tray disposed in the oven; the oven includes a vacuum system and a power supply, the vacuum system is connected to the air outlet of the air path, and the power supply is electrically connected to the circuit to form a loop.

[0015] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects.

[0016] 1. An air passage is integrated on the tray body to evacuate the batteries installed on the tray. Under vacuum, the boiling point of water is significantly reduced, so that the liquid water in the battery cell can reach the boiling point at a lower temperature and turn into water vapor, thus accelerating the drying rate.

[0017] 2. The high vacuum inside the battery reduces gas resistance and pressure during evaporation, making it easier for moisture to move from the inside of the cell to the surface and evaporate, significantly accelerating the drying rate.

[0018] 3. Since the battery cell includes a positive electrode, a negative electrode, and a separator that isolates the positive and negative electrodes, the battery cell can be equivalent to a capacitor structure. Therefore, when baking is required, the AC power supply and the circuit are electrically connected to form a loop, which causes the battery cell itself to heat up. This reduces the heat conduction process and greatly improves the heating efficiency. Attached Figure Description

[0019] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0020] Figure 1 This is a schematic diagram of a battery baking tray according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the battery in an embodiment of the present invention;

[0022] Figure 3 This is an exploded view of the tray body in an embodiment of the present invention;

[0023] Figure 4 This is a top view of the tray in an embodiment of the present invention;

[0024] Figure 5 for Figure 4 AA section diagram;

[0025] Figure 6 for Figure 4 BB cross-sectional view.

[0026] Explanation of reference numerals in the instruction manual:

[0027] 1—Tray body; 10—Bearing surface; 11—Air passage; 111—Air outlet; 112—Air extraction port; 12—Circuit circuit; 121—Terminal assembly; 13—First split; 131—Air passage; 132—First mounting surface; 14—Second split; 141—Accommodation space; 142—Second mounting surface; 15—Power supply; 16—Air source; 2—Negative pressure suction nozzle; 3—Spring probe; 4—Battery; 41—First wall; 5—Injection hole; 6—Terminal; 61—Positive terminal; 62—Negative terminal; 7—Limiting structure; 71—Slot; 8—Groove. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0029] In related technologies, lithium-ion batteries require baking to remove internal moisture from the cells before electrolyte filling. This is typically done using a vacuum oven, which has both heating and vacuuming functions. Vacuuming is performed on the entire baking chamber, while heating is achieved by transferring heat from the battery casing to the cells via a heating plate. However, the inventors found that this method cannot completely remove internal moisture, and the baking efficiency is low. To address these technical problems, this embodiment provides a battery baking tray and apparatus.

[0030] Reference Figure 1 and Figure 2 As shown, this utility model discloses a battery baking tray, comprising: a tray body 1, an air passage 11 and an electrical circuit 12 disposed on the tray body 1. The tray body 1 is used to support batteries 4, such as... Figure 3 As shown, the battery 4 includes a battery casing and a battery cell. The battery casing includes a first wall 41, on which a positive electrode post 61 and a negative electrode post 62 are provided, as well as an electrolyte injection hole 5. The battery casing and battery cell have been assembled and are ready to be injected with electrolyte.

[0031] The battery cells inside the aforementioned battery casing are connected to the outside air only through the liquid injection hole 5 on the first wall 41. It is difficult for all the water vapor generated during drying to escape. A vacuum can be created inside the battery casing through the air passage 11, thereby extracting the water vapor and achieving drying while simultaneously removing water vapor, thus avoiding the problem of moisture re-entry after cooling.

[0032] The aforementioned tray body 1 includes a bearing surface 10, which is used to support the batteries 4 that need to be dried. To achieve batch drying, the tray body 1 can support multiple batteries 4. Specifically, considering that the batteries 4 are mostly cuboid in shape, to increase the arrangement density of the batteries 4 on the same tray body 1 and thus improve drying efficiency, the multiple batteries 4 can be arranged in an array. This also has the advantage of facilitating the layout of the air passages 11 and circuits 12, simplifying their structure, and making them easier to manufacture and maintain.

[0033] Next, to ensure that the battery 4 can be connected to the air passage 11 and the circuit 12 respectively when it is placed on the support surface 10, the air passage 11 and the circuit 12 are integrated on the tray body 1. Specifically:

[0034] The aforementioned air passage 11 is installed on the tray body 1. This air passage 11 has an air outlet 111 and an air extraction port 112. The air extraction port 112 is located on the bearing surface 10. The air extraction port 112 communicates with the liquid injection hole 5 of the battery 4 provided on the bearing surface 10, and the air outlet 111 communicates with the negative pressure air source 16. Thus, when the negative pressure air source 16 is activated, a vacuum can be created inside the battery 4's casing.

[0035] The aforementioned circuit 12 is mounted on the tray body 1. The circuit 12 has a terminal assembly 121, which includes a positive contact and a negative contact, both exposed on the bearing surface 10. The positive contact is configured to be electrically connected to the positive terminal 61 of the battery 4, and the negative contact is configured to be electrically connected to the negative terminal 62 of the battery 4. Since the battery cell includes a positive electrode, a negative electrode, and a separator separating the positive and negative electrodes, the battery cell can be considered equivalent to a capacitor structure. Therefore, when the AC power supply 15 and the circuit 12 are electrically connected and form a circuit, the battery cell itself can generate heat. The current of the AC power supply 15 is adjustable from 5 to 50 A.

[0036] In summary, this embodiment integrates the air path 11 and the circuit 12 on the tray body 1, so that the battery 4 can be quickly connected to the air path 11 and the circuit 12 simply by placing the battery 4 on the support surface 10. After the battery 4 is connected to the air path 11 and the circuit 12, the negative pressure air source 16 is first activated to evacuate the inside of the battery casing. The negative pressure air source 16 is then stopped and the AC power supply 15 is activated to supply power, allowing the battery cell itself to heat up and begin baking. Finally, the negative pressure air source 16 is activated again to promptly extract water vapor from the inside of the battery casing, thereby avoiding the problem of moisture re-entry after cooling.

[0037] In some embodiments, in order to achieve the purpose of batch baking, that is, to be able to support multiple batteries 4 on the bearing surface 10 of a tray body 1, it is necessary to design the air passage 1 to have multiple air extraction ports 112 adapted to the number of batteries 4, and it is also necessary to design the circuit 12 to have multiple terminal assemblies 121 adapted to the number of batteries 4. Since each battery 4 needs to be vacuumed and baked, it is necessary to design the number of air extraction ports 112 and the number of terminal assemblies 121 to be the same to avoid waste.

[0038] For example, see Figure 2 The battery 4 is rectangular in shape. The positive electrode post 61, the liquid injection hole 5 and the negative electrode post 62 are arranged at intervals along the first direction on the first wall 41. In order to match the arrangement of the positive electrode post 61, the liquid injection hole 5 and the negative electrode post 62, the positive electrode contact point, the air extraction port 112 and the negative electrode contact point are arranged at intervals along the first direction.

[0039] Here, one positive contact point, one vent 112, and one negative contact point can be considered as corresponding to one battery 4. When multiple batteries 4 are arranged in an array, that is, when multiple batteries 4 are divided into multiple rows and columns, multiple positive contact points, vent 112, and negative contact points are all spaced apart along the second direction. Multiple positive contact points, vent 112, and negative contact points are arranged as a whole spaced apart along the first direction.

[0040] It should be noted that the first direction is the length direction of the cuboid-shaped battery 4, and the second direction is the width direction of the cuboid-shaped battery 4.

[0041] In some embodiments, since the positive electrode post 61 and the negative electrode post 62 protrude from the first wall 41, the liquid injection hole 5 is disposed on the first wall 41, and the vent hole is disposed on the bearing surface 10, when the battery 4 is placed on the bearing surface 10, i.e., the positive electrode contact point is electrically connected to the positive electrode post 61, the negative electrode contact point is electrically connected to the negative electrode post 62, and there is a gap between the vent hole 112 and the liquid injection hole 5, a negative pressure suction nozzle 2 needs to be designed to compensate for the above-mentioned gap to ensure that the vent hole 112 and the liquid injection hole 5 are connected. Specifically, one end of the negative pressure suction nozzle 2 is inserted into the vent hole 112 and is sealed to the vent hole 112; the other end of the negative pressure suction nozzle 2 is configured to be sealed to the liquid injection hole 5.

[0042] It should be noted that, in order to ensure that the negative pressure suction nozzle 2, the air extraction port 112, and the liquid injection hole 5 are all sealed together, the negative pressure suction nozzle 2 is made of soft rubber or silicone materials.

[0043] It should also be noted that the negative pressure nozzle 2 has various structural shapes. Specifically, the negative pressure nozzle 2 is trumpet-shaped and has an air intake channel. The small end of the negative pressure nozzle 2 is sealed to the air extraction port 112, and the air intake channel is connected to it. The large end of the negative pressure nozzle 2 is adsorbed onto the first wall 41, and the air intake channel is connected to the liquid injection hole 5.

[0044] In some embodiments, to reduce the surface machining precision required for the positive electrode post 61 and the negative electrode post 62, and to reduce the assembly precision between the positive electrode post 61 and the negative electrode post 62 and the first wall 41, spring-loaded probes 3 are designed to be electrically connected to both the positive and negative electrode contact points. Thus, even if the surfaces of the positive electrode post 61 and the negative electrode post 62 are not flush, the spring-loaded probes 3 at both the positive electrode post 61 and the positive electrode contact point can be electrically connected simultaneously.

[0045] It should also be noted that the spring-type probe 3 has various structures. For example, the spring-type probe 3 includes a hollow sleeve and a spring terminal. One end of the spring terminal is electrically connected to the positive or negative contact point, and the other end of the spring terminal is sleeved inside the hollow sleeve. The end of the hollow sleeve away from the spring terminal is a closed end, which is configured to make contact with the positive post 61 or negative post 62 corresponding to the positive or negative contact point for conducting electricity.

[0046] In some embodiments, considering that both the positive terminal 61 and the negative terminal 62 protrude from the first wall, the battery baking tray also includes a limiting structure 7 for mounting and fixing the battery 4 in order to ensure that the battery 4 is securely placed on the support surface 10. The limiting structure 7 ensures that the multiple batteries 4 are securely placed on the support surface 10.

[0047] Furthermore, in order to reduce costs and to ensure that all batteries 4 can be securely mounted on the bearing surface 10, the aforementioned limiting structure 7 is designed to be directly fixed to the tray body 1. For example, the limiting structure 7 is fixed to the tray body 1 by bolts; or the limiting structure 7 and the tray body 1 are integrally formed.

[0048] Specifically, when multiple batteries 4 are arranged in an array, the limiting structure 7 includes multiple clamping plates spaced apart along a second direction or along a first direction. The batteries 4 are clamped between two adjacent clamping plates. To position the batteries 4, slots 71 are provided on the side of the clamping plates facing the batteries 4. These slots 71 penetrate the clamping plates in a direction perpendicular to the bearing surface 10. Thus, the insertion of the battery casing and the slots 71 ensures that the batteries 4 are securely placed on the bearing surface 10. The number of slots 71 on each clamping plate is related to the number of batteries 4 directly opposite that clamping plate.

[0049] Furthermore, to accommodate different sizes of the cuboid-shaped battery 4, multiple mounting holes spaced apart along the second or first direction can be provided on the bearing surface 10 at the position corresponding to each clamping plate. In this way, the spacing between adjacent clamping plates along the second or first direction is adjustable.

[0050] It should be noted that heating wires can be installed inside the clamping plate for better baking of the battery cells. This allows for baking not only by relying on the heat generated by the battery cells themselves, but also by using the clamping plate as a heating plate to transfer heat to the battery cells through the battery casing, thus achieving a faster baking speed.

[0051] In some embodiments, considering that both the positive terminal 61 and the negative terminal 62 protrude from the first wall 41, in order to ensure that the battery 4 is securely placed on the support surface 10, the support surface 10 of the tray body 1 is designed to have recesses 8, and the number of recesses 8 corresponds one-to-one with the number of batteries 4.

[0052] The groove 8 is configured to accommodate the positive terminal 61 and the negative terminal 62 of the battery 4, wherein a terminal assembly 121 and a vent 112 are both disposed within the groove 8. Thus, when the battery 4 is placed on the support surface 10, the portions of the positive terminal 61 and the negative terminal 62 that protrude from the first wall 41 are both accommodated within the groove 8, and the first wall 41 and the horizontal surfaces of the support surface 10 other than the groove are in contact.

[0053] Furthermore, in order to ensure that the battery 4 is placed more securely on the bearing surface 10, a support block is provided in the groove 8. The support block is configured to support the first wall 41 of the battery 4. By setting the support block, the contact surface with the first wall 41 of the battery casing is increased, thereby making the battery 4 placed more securely.

[0054] In some embodiments, since multiple batteries 4 are provided, i.e., multiple air extraction ports 112 are provided, in order to connect the multiple air extraction ports 112, the air passage 11 also includes an air passage channel 131. The air passage channel 131 is connected to all multiple air extraction ports 112, and the air passage channel 131 is connected to the air outlet 111. Considering that multiple trays need to be arranged in an oven, in order to simplify the pipeline layout, the air passage channel 131 is designed to be directly machined on the tray body 1, that is, the air passage channel 131 is opened inside the tray body 1, and the air passage channel 131 forms multiple air extraction ports 112 on the bearing surface 10.

[0055] It should be noted that the air extraction port 112 and the air outlet 111 can both be formed on the bearing surface 10. Of course, the air outlet 111 can also be formed on the outer surface of the pallet body 1 other than the bearing surface 10.

[0056] In some embodiments, since there are multiple batteries 4, that is, multiple positive and multiple negative contacts are provided, the circuit 12 also includes wires. Multiple positive and multiple negative contacts are provided on the wires. When forming a circuit with the AC power supply 15, it is necessary to electrically connect the positive terminal of the AC power supply 15 to one end of the wire and connect the negative terminal of the AC power supply 15 to the other end of the wire.

[0057] It should be noted that the wires here can be conductive materials embedded within the FPC (Flexible Printed Circuit Board), meaning circuit 12 is an FPC with multiple positive and negative contact points. Alternatively, the wires can be conductive materials embedded within a cable, meaning circuit 12 is a cable with multiple positive and negative contact points.

[0058] Specifically, considering the need to integrate the air path 11 and the circuit 12 into the tray body 1, the tray body 1 is designed to include a first part 13 and a second part 14 arranged opposite to each other. An air path channel 131 is opened inside the first part 13, which connects the air extraction port 112 and the air outlet 111. The side of the first part 13 facing away from the second part 14 is the bearing surface 10. The bearing surface 10 of the first part 13 has multiple recesses, and each recess has an air extraction port 112 at the bottom. Each air extraction port 112 is connected to the air path channel 131, and each air extraction port 112 is connected to a negative pressure suction nozzle 2.

[0059] Continuing, the side of the first component 13 opposite to the bearing surface 10 is the first mounting surface 132, and the side of the second component 14 facing the first component 13 is the second mounting surface 142; a receiving space 132 is formed between the first mounting surface 132 and the second mounting surface 142; the circuit also includes a wire electrically connected to the terminal assembly 121; the wire is received in the receiving space 132; each groove 8 of the first component 13 has two mounting holes at its bottom, and each mounting hole communicates with the receiving space 132; a spring probe 3 is installed in each mounting hole; in one groove 8, one spring probe 3 is electrically connected to the negative contact point provided on the wire, and the other spring probe 3 is electrically connected to the positive contact point provided on the wire.

[0060] It should be noted that the accommodating space 132 can be a accommodating groove formed by the recess of the first mounting surface 132 of the first segment 13 and surrounded by the second mounting surface 142 of the second segment 14; it can also be surrounded by a accommodating groove formed by the recess of the first mounting surface 132 of the first segment 13 and the second mounting surface 142 of the second segment 14; or it can be surrounded by a accommodating groove formed by the recess of the first mounting surface 132 and the accommodating groove of the second mounting surface 142 of the second segment 14.

[0061] As an optional embodiment, the tray body 1 is also provided with a temperature sensor; the temperature sensor is configured to contact the casing of the battery 4 and collect the temperature data of the casing.

[0062] A temperature sensor can be mounted on the bearing surface 10, with its position corresponding to the first wall 41 of the battery 4. For ease of installation, the temperature sensor is connected to the circuit 12. Specifically, the temperature sensor can be positioned at a distance from the positive terminal 61 or the negative terminal 62 that is not less than a preset threshold value. For example, within the aforementioned groove 8 or within the range of the slot 71.

[0063] The temperature sensor is mainly used to detect the battery temperature. For example, the temperature sensor is a thermocouple, which is installed upside down on the first wall 41 to detect the battery temperature. This prevents the battery from overheating and being damaged during the drying process.

[0064] This embodiment also provides a battery baking apparatus, including an oven and a battery baking tray disposed inside the oven as described above.

[0065] The drying oven includes a vacuum system and a power supply 15. The vacuum system is connected to the air outlet 111 of the air passage 11, and the power supply 15 is electrically connected to the circuit 12 to form a loop. The vacuum system is a negative pressure air source 16, which eliminates the need for a separate power supply 15 and negative pressure air source 16 for the tray body 1, thereby simplifying the structure of the drying oven system, reducing the system failure rate, and facilitating drying operations.

[0066] It should be noted that the baking technology in related technologies has low heating efficiency due to the method of heating with an electrically powered heating plate and conducting heat to the battery. In order to improve efficiency, this embodiment uses an alternating current to make the battery self-heating, which significantly improves the heating efficiency. At the same time, a gas path is used to evacuate the battery filling hole to remove moisture from the battery.

[0067] The specific process is as follows: Battery 4, with its electrolyte injection hole 5 facing downwards, is placed on tray body 1 by a robot or manually. Under gravity, the positive terminal 61 of battery 4 and the positive spring probe 3 are tightly connected, and the negative terminal 62 of battery 4 and the negative spring probe 3 are tightly connected; the first wall 41 of battery 4 is also tightly connected to the negative pressure suction nozzle 2 on tray body 1. Afterwards, tray body 1 is placed in an oven by a robot or manually, and the oven door is closed and sealed. AC power is supplied to control power supply 15 to heat the battery cell itself, and the vacuum system is controlled to evacuate the inside of the battery casing and remove water vapor during the baking process. After the battery cell heats up, the temperature can be detected by a thermocouple, and the current of power supply 15 is adjusted based on the feedback temperature to ultimately control the battery temperature within a specified range. Specifically, the current of power supply 15 is reduced when the temperature is high, and increased when the temperature is low.

[0068] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A battery baking tray, characterized in that, include: Pallet body (1), the pallet body (1) includes a bearing surface (10); An air passage (11) is provided on the tray body (1); the air passage (11) has an air outlet (111) and an air extraction port (112), the air outlet (111) is configured to communicate with a negative pressure air source, and the air extraction port (112) is configured to communicate with the liquid injection hole (5) of the battery (4); Circuit (12), the circuit (12) is disposed on the tray body (1); the circuit (12) has a terminal assembly (121), the terminal assembly includes a positive contact and a negative contact, the positive contact is configured to be electrically connected to the positive terminal (61) of the battery (4), and the negative contact is configured to be electrically connected to the negative terminal (62) of the battery (4); The air extraction port (112) is located on the bearing surface (10); both the positive electrode contact point and the negative electrode contact point are exposed on the bearing surface (10).

2. The battery baking tray according to claim 1, characterized in that, There are multiple air extraction ports (112) and multiple terminal assemblies (121), and the number of air extraction ports (112) is the same as the number of terminal assemblies (121).

3. The battery baking tray according to claim 2, characterized in that, Also includes: A limiting structure (7) is provided on the bearing surface (10); the limiting structure (7) has a slot (71) configured to be inserted into the battery casing of the battery (4).

4. The battery baking tray according to claim 2, characterized in that, The bearing surface (10) of the tray body (1) is recessed to form a groove (8), which is configured to accommodate the positive terminal and negative terminal of the battery (4). A terminal assembly (121) and an air extraction port (112) are both disposed in the groove (8). A support block is disposed in the groove (8), which is configured to support the first wall (41) of the battery (4).

5. The battery baking tray according to any one of claims 1 to 4, characterized in that, Both the air passage (11) and the circuit (12) are built into the tray body (1).

6. The battery baking tray according to claim 5, characterized in that, Also includes: A negative pressure suction nozzle (2) is provided, one end of which is inserted into the air extraction port (112) and is sealed to the air extraction port (112); the other end of the negative pressure suction nozzle (2) is configured to be sealed to the injection hole (5).

7. The battery baking tray according to claim 6, characterized in that, The terminal assembly (121) also includes a spring probe (3), and both the positive contact point and the negative contact point are electrically connected to the spring probe (3).

8. The battery baking tray according to claim 7, characterized in that, The tray body (1) includes a first part (13) and a second part (14) arranged opposite to each other. An air passage (131) is provided inside the first part (13), and the air passage (131) connects the air extraction port (112) and the air outlet (111). The side of the first part (13) facing away from the second part (14) is the bearing surface (10). The side of the first split (13) opposite to the bearing surface (10) is the first mounting surface (132), and the side of the second split (14) facing the first split (13) is the second mounting surface (142); an accommodating space (141) is formed between the first mounting surface (132) and the second mounting surface (142); wherein, the circuit (12) further includes a wire electrically connected to the terminal assembly (121), the wire being accommodated in the accommodating space (141); the terminal assembly (121) is disposed in the first split (13).

9. The battery baking tray according to claim 1, characterized in that, The tray body (1) is also provided with a temperature sensor; the temperature sensor is configured to contact the outer casing of the battery (4) to collect the temperature data of the outer casing.

10. A battery baking device, characterized in that, Includes an oven, and a battery baking tray disposed within the oven as described in any one of claims 1 to 9; The oven includes a vacuum system and a power supply. The vacuum system is connected to the air outlet (111) of the air passage (11), and the power supply is electrically connected to the circuit (12) to form a loop.

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