Battery baking equipment

Abstract

The invention relates to the field of battery manufacturing, and discloses battery baking equipment which is used for baking a battery, the battery comprises a shell with a battery cavity and a battery cell arranged in the battery cavity, the shell is provided with an air inlet hole and an air outlet hole, and the air inlet hole and the air outlet hole are communicated with the battery cavity; the battery baking equipment comprises a baking box, an air passage connecting mechanism, a wind power heating mechanism, a vacuum negative pressure mechanism and a controller, wherein the baking box is provided with a closed cavity for accommodating a battery; the air channel connecting mechanism comprises an air inlet pipeline and an air outlet pipeline; the output end of the wind power heating mechanism is connected with the air inlet through an air inlet pipeline and outputs cold air or hot air to the battery cavity; the vacuum negative-pressure mechanism is connected with the air outlet through an air outlet pipeline; the wind power heating mechanism and the vacuum negative pressure mechanism are both electrically connected with the controller, and the controller can adjust the pressure state of the battery cavity by controlling the working states of the wind power heating mechanism and the vacuum negative pressure mechanism; internal hot air convection heating is adopted, and the water baking consistency of the battery inner core can be effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of battery manufacturing, and particularly relates to battery baking equipment. Background Art

[0002] At present, lithium-ion batteries are developing rapidly. Aluminum-shell batteries are the main sub-products of lithium-ion batteries, accounting for 80% to 90% of the market share and becoming the mainstream of industry development. In the manufacturing process of aluminum-shell batteries, moisture has an important impact on the performance of lithium batteries. Cell baking is the main control process for removing moisture in the manufacturing process of aluminum-shell batteries, which has a great impact on the process efficiency and quality safety of aluminum-shell batteries.

[0003] Currently, the most common method of baking batteries in the industry is to bake them in a conventional oven. The oven contains a large, sealed, heat-insulating cavity. The batteries are placed in this cavity and the moisture inside is removed by heating the cavity. This is how the battery cells are baked to remove moisture. In other words, the existing process uses heat radiation from hot air and the shell to transfer heat. The temperature must be transferred to the shell before it can be transferred to the battery cells inside. This drying method has slow heat transfer and poor heat transfer uniformity, resulting in low production efficiency and poorly uniform moisture content in the battery cells. Summary of the Invention

[0004] In response to at least one of the above-mentioned defects or shortcomings of the prior art, the present invention provides a battery baking device, which adjusts the heating and baking mode from thermal radiation to internal hot air convection heating, which can effectively overcome the limitations of traditional thermal radiation heating and improve the heating rate of baking and the consistency of moisture baking.

[0005] To achieve the above-mentioned object, the present invention provides a battery baking device for baking a battery, wherein the battery comprises a housing with a battery cavity and a battery cell disposed in the battery cavity, wherein the housing is provided with an air inlet and an air outlet, wherein the air inlet and the air outlet are both connected to the battery cavity, and the battery baking device comprises:

[0006] a baking oven having a sealed cavity for accommodating the battery;

[0007] An airway connection mechanism, including an air inlet pipe and an air outlet pipe;

[0008] A wind heating mechanism, the output end of which is used to connect to the air inlet through the air inlet duct and output cold air or hot air to the battery cavity;

[0009] A vacuum negative pressure mechanism, used for connecting the air outlet through the air outlet pipe;

[0010] The wind heating mechanism and the vacuum negative pressure mechanism are both electrically connected to the controller, and the controller is configured as follows:

[0011] The working states of the wind heating mechanism and the vacuum negative pressure mechanism are controlled to adjust the pressure state of the battery cavity.

[0012] In some embodiments, the controller is configured to control the working states of the wind heating mechanism and the vacuum negative pressure mechanism to adjust the pressure state of the battery chamber, including:

[0013] When it is determined that the current temperature in the sealed cavity has not reached a preset temperature, the wind heating mechanism is controlled to output hot air to the battery cavity through the air inlet, so that the cold air in the battery cavity is discharged through the air outlet and the battery cavity is in a positive pressure state to preheat the battery cell;

[0014] When it is determined that the current temperature in the sealed cavity reaches the preset temperature, the working states of the wind heating mechanism and the vacuum negative pressure mechanism are controlled according to the current temperature of the sealed cavity and the current pressure in the battery cavity, so that the battery cavity is in a negative pressure state for battery cell baking.

[0015] In some embodiments, the controller is configured to control the working states of the wind heating mechanism and the vacuum negative pressure mechanism according to the current temperature of the sealed cavity and the current pressure in the battery cavity, including:

[0016] determining that the current pressure in the battery chamber is within a preset pressure range, and controlling the vacuum negative pressure mechanism to reduce vacuum exhaust power so that the current pressure is maintained within the preset pressure range;

[0017] determining that the current pressure in the battery chamber does not reach a preset pressure, and controlling the vacuum negative pressure mechanism to increase vacuum exhaust power until the current pressure is within a preset pressure range;

[0018] Determining that the current temperature in the sealed cavity is within a preset temperature range, and controlling the wind heating mechanism to reduce heating power so that the current temperature is maintained at the preset temperature;

[0019] It is determined that the current temperature in the sealed cavity is not within a preset temperature range, and the wind heating mechanism is controlled to increase the heating power until the current temperature is within the preset temperature range.

[0020] In some embodiments, the controller is further configured to:

[0021] Determine that the battery cell baking is completed, control the wind heating mechanism to output cold air to the battery cavity through the air inlet, control the vacuum negative pressure mechanism to discharge hot air to the battery cavity through the air outlet, and cool the battery with cold air.

[0022] In some embodiments, the battery baking device further comprises:

[0023] A lifting power supply device is installed outside the closed cavity;

[0024] a lifting platform, wherein the airway connection mechanism is fixed on the lifting platform;

[0025] The lifting cylinder is vertically arranged, with a first end passing through the baking oven and connected to the lifting power supply device, and a second end connected to the lifting platform. The lifting power supply device is electrically connected to the controller, and the controller is configured as follows:

[0026] When it is determined that the start command has been received, the lifting cylinder is driven to extend and retract by the lifting power supply device, so that the lifting platform is lowered until the airway connection mechanism docks with the shell;

[0027] When it is determined that the battery cooling is completed, the lifting cylinder is driven to extend and retract by the lifting power supply device, so that the lifting platform is raised until the airway connection mechanism is separated from the shell.

[0028] In some embodiments, the air outlet pipe is fixedly connected to the air outlet hole, and the air inlet pipe is connected to the lifting platform. The lifting platform is used to drive the air inlet pipe to connect with or detach from the shell during the lifting process.

[0029] In some embodiments, the air inlet duct and the air outlet duct are both connected to the lifting platform, and the lifting platform is used to drive the air inlet duct and the air outlet duct to dock with or detach from the shell during the lifting process.

[0030] In some embodiments, the battery baking equipment further includes a battery positioning tool installed at the bottom of the baking oven, and the battery positioning tool is used to clamp the battery.

[0031] In some embodiments, the wind heating mechanism comprises:

[0032] Fan power supply device;

[0033] A heater, wherein the fan power supply device is installed outside the closed cavity and passes through the closed cavity to be connected to the heater;

[0034] A filter is provided, wherein the output end of the heater is connected to the air intake pipe through the filter.

[0035] In some embodiments, the vacuum negative pressure mechanism includes a vacuum power supply device, a vacuum valve and a vacuum meter, and the output end of the vacuum power supply device is connected to the air outlet pipe through the vacuum valve and the vacuum meter in sequence.

[0036] Through the above technical solution, the battery baking is adjusted from the existing external radiation heating to internal hot air convection heating. The hot air directly enters the battery cavity through the air inlet and outlet ducts, that is, the hot air contacts and transfers heat with the battery cells. This can effectively overcome the limitations of traditional thermal radiation heating, reduce the heat conduction path and thermal inertia, quickly increase the temperature and accelerate the heat dissipation efficiency in the cooling stage.

[0037] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation of the embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without inventive work. In the accompanying drawings:

[0039] Figure 1 It is a structural schematic diagram of the battery baking equipment of the present invention;

[0040] Figure 2 It is a structural schematic diagram of the battery in the battery baking equipment of the present invention;

[0041] Figure 3 This is a structural diagram of the connection between the lifting power supply device, the lifting cylinder, and the lifting platform in the battery baking equipment of the present invention;

[0042] Figure 4 This is a schematic structural diagram of the wind-powered heating mechanism in the battery baking equipment of the present invention;

[0043] Figure 5 Schematic diagram of the structure of the airway connection mechanism in the battery baking equipment of the present invention;

[0044] Figure 6 Schematic diagram of the structure of the vacuum negative pressure mechanism in the battery baking equipment of the present invention;

[0045] Figure 7 It is a structural schematic diagram of another embodiment of the battery baking equipment of the present invention;

[0046] Figure 8 It is a structural schematic diagram of another embodiment of a battery in a battery baking device of the present invention;

[0047] Description of Reference Numerals

[0048] 1 Battery 11 Housing

[0049] 12 air inlet 13 air outlet

[0050] 2 Baking Oven 21 Sealed Cavity

[0051] 22 Lifting power supply device 23 Lifting cylinder

[0052] 24 Lifting platform 25 Battery positioning tool

[0053] 3 Airway connection mechanism 31 Intake pipe

[0054] 311 First air intake duct 312 Second air intake duct

[0055] 32 air outlet pipe 321 first air outlet pipe

[0056] 322 Second air outlet pipe 33 Connecting pipe

[0057] 4 Wind heating mechanism 41 Fan power supply device

[0058] 42 Heater 43 Filter

[0059] 5 Vacuum negative pressure mechanism 51 Vacuum power supply device

[0060] 52 Vacuum valve 53 Vacuum gauge

[0061] 6 Controller DETAILED DESCRIPTION

[0062] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0063] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.

[0064] like Figure 1 and Figure 2As shown, the present invention provides a battery baking device for baking a battery 1, the battery 1 includes a shell 11 with a battery cavity and a battery cell arranged in the battery cavity, the shell 11 is provided with an air inlet 12 and an air outlet 13, the air inlet 12 and the air outlet 13 are both connected to the battery cavity, the battery baking device includes a baking oven 2, an air duct connecting mechanism 3, a wind heating mechanism 4, a vacuum negative pressure mechanism 5 and a controller 6; the baking oven 2 has a sealed cavity 21 for accommodating the battery 1; the air duct connecting mechanism 3 includes an air inlet duct 31 and an air outlet duct 32; the output end of the wind heating mechanism 4 is used to connect to the air inlet 12 through the air inlet duct 31 and output cold air or hot air to the battery cavity; the vacuum negative pressure mechanism 5 is used to connect to the air outlet 13 through the air outlet duct 32; the wind heating mechanism 4 and the vacuum negative pressure mechanism 5 are both electrically connected to the controller 6, and the controller 6 is configured to: control the working states of the wind heating mechanism 4 and the vacuum negative pressure mechanism 5 to adjust the pressure state of the battery cavity.

[0065] During use, the battery 1 is placed in the sealed cavity of the baking oven 2, the air inlet duct 31 is connected to the air inlet hole 12 on the battery 1 shell 11, and the air outlet duct 32 is connected to the air outlet hole 13 on the shell 11. The controller 6 controls the wind heating mechanism 4 to input hot air into the air inlet duct 31. The hot air enters the battery cavity through the air inlet hole 12, and heats and bakes the battery cell of the battery 1 by hot air convection. The pressure in the battery cavity increases, and the vacuum negative pressure mechanism 5 is started to discharge the cold air in the battery cavity through the air outlet duct 32 and the vacuum negative pressure mechanism 5, so that convection is formed in the battery cavity. The controller can maintain positive pressure in the battery cavity by controlling the working states of the wind heating mechanism 4 and the vacuum negative pressure mechanism 5. The positive pressure drives the hot air to form a stable convection cycle in the battery cavity, eliminating local low-temperature dead corners. The positive pressure environment can also evenly support the inner wall of the shell 11, offsetting the deformation stress of the shell 11 caused by the sudden temperature rise. When the temperature reaches the preset temperature, the controller 6 can control the working status of the wind heating mechanism 4 and the vacuum negative pressure mechanism 5 to maintain a negative pressure state in the battery cavity. The negative pressure reduces the evaporation temperature of water to avoid high temperature damage to sensitive materials. The negative pressure also accelerates the discharge of volatile by-products, reduces side reactions at high temperatures, and improves safety.

[0066] Positive pressure rapidly heats up, avoiding the bottleneck of slow heat transfer in the initial negative pressure stage. Negative pressure efficiently desorbs, preventing material aging caused by long-term high temperatures under positive pressure. The phased combination of positive pressure preheating and negative pressure baking precisely controls air flow rate and temperature, taking into account heating efficiency, drying depth, and material protection, significantly improving heating efficiency and reducing the risk of local overheating or underheating. By forming hot air convection heating within the battery cavity, the hot air directly contacts and transfers heat with the battery cell structure inside Battery 1, reducing the heat conduction path and thermal inertia, rapidly raising the temperature and accelerating the heat dissipation efficiency during the cooling stage, thereby improving the uniformity of the battery cell moisture baking. It is particularly suitable for the manufacture of advanced batteries with high energy density and thick electrode designs, and can significantly improve product consistency and safety.

[0067] In some embodiments, the controller 6 is configured to control the working states of the wind heating mechanism 4 and the vacuum negative pressure mechanism 5 to adjust the pressure state of the battery cavity, including: when it is determined that the current temperature in the sealed cavity 21 has not reached the preset temperature, controlling the wind heating mechanism 4 to output hot air to the battery cavity through the air inlet 12, so that the cold air in the battery cavity is discharged through the air outlet 13 and the battery cavity is in a positive pressure state to preheat the battery cell; when it is determined that the current temperature in the sealed cavity 21 has reached the preset temperature, controlling the working states of the wind heating mechanism 4 and the vacuum negative pressure mechanism 5 according to the current temperature of the sealed cavity 21 and the current pressure in the battery cavity, so that the battery cavity is in a negative pressure state to bake the battery cell.

[0068] Specifically, the controller 6 controls the wind heating mechanism 4 to input hot air into the battery cavity. After the hot air continues to enter the battery cavity, the pressure in the battery cavity increases. The controller 6 then starts the vacuum negative pressure mechanism 5 to discharge the cold air through the air outlet duct 32 to the outside of the baking oven 2. At this time, the battery cavity is in a positive pressure state, and the hot air flows through the battery cavity to preheat the battery cell. Furthermore, the wind heating mechanism 4 continues to input hot air into the battery cavity until the temperature in the closed cavity 21 reaches a preset temperature. At this time, the controller 6 adjusts the working state of the wind heating mechanism 4 and the vacuum negative pressure mechanism 5 according to the current temperature of the closed cavity 21 and the current pressure in the battery cavity, so that the battery cavity is in a negative pressure state for baking the battery cell. Among them, the preset temperature can be set according to the performance of the battery 1 to be baked.

[0069] In some embodiments, the controller 6 is configured to control the operating states of the wind heating mechanism 4 and the vacuum negative pressure mechanism 5 according to the current temperature of the sealed cavity 21 and the current pressure in the battery cavity. Specifically, if it is determined that the current pressure in the battery cavity is within a preset pressure range, the vacuum negative pressure mechanism 5 is controlled to reduce the vacuum exhaust power so that the current pressure is maintained within the preset pressure range.

[0070] If it is determined that the current pressure in the battery chamber does not reach the preset pressure, the vacuum negative pressure mechanism 5 is controlled to increase the vacuum discharge power until the current pressure is within the preset pressure range;

[0071] If it is determined that the current temperature in the sealed cavity 21 is within the preset temperature range, the wind heating mechanism 4 is controlled to reduce the heating power so that the current temperature is maintained at the preset temperature;

[0072] If it is determined that the current temperature in the sealed cavity 21 is not within the preset temperature range, the wind heating mechanism 4 is controlled to increase the heating power until the current temperature is within the preset temperature range.

[0073] In some embodiments, the controller 6 is further configured to, if it is determined that the battery cell baking is completed, control the wind heating mechanism 4 to output cold air to the battery cavity through the air inlet 12, and control the vacuum negative pressure mechanism 5 to discharge hot air to the battery cavity through the air outlet 13, so as to cool the battery 1 with cold air.

[0074] In some embodiments, as Figure 3 As shown, the battery baking equipment also includes a lifting power supply device 22, a lifting platform 24 and a lifting cylinder 23. The lifting power supply device 22 is installed on the outside of the closed cavity 21. The lifting cylinder 23 is vertically arranged and the first end passes through the baking oven 2 and is connected to the lifting power supply device 22, and the second end is connected to the lifting platform 24. The lifting power supply device 22 and the controller 6 are electrically connected, and the airway connection mechanism 3 is fixed on the lifting platform 24; the controller 6 is configured to: when it is determined that a start-up instruction is received, the lifting power supply device 22 drives the lifting cylinder 23 to extend and retract, so that the lifting platform 24 descends until the airway connection mechanism 3 docks with the shell 11; when it is determined that the battery 1 has been cooled, the lifting power supply device 22 drives the lifting cylinder 23 to extend and retract, so that the lifting platform 24 rises until the airway connection mechanism 3 is separated from the shell 11.

[0075] Among them, the lifting power supply device 22 is connected to the lifting cylinder through a connecting block, and the lifting cylinder 23 is connected to the lifting platform 24 through another connecting block. The lifting power supply device 22 controls the extension and contraction ratio of the cylinder, thereby controlling the rising and falling positions of the lifting platform 24.

[0076] In some embodiments, as Figure 1 and Figure 2 The air inlet pipe 31 and the air outlet pipe 32 are both connected to the lifting platform 24. The lifting platform 24 is used to drive the air inlet pipe 31 and the air outlet pipe 32 to dock or detach from the housing 11 during the lifting process. Figure 5As shown, the air inlet duct 31 includes a first air inlet duct 311 and a second air inlet duct 312, which are connected via a connecting pipe 33. The air outlet duct 32 includes a first air outlet duct 321 and a second air outlet duct 322, which are connected via the connecting pipe 33. The connecting pipe 33 is connected to the lifting platform 24, so that the air inlet duct 31 and the air outlet duct 32 are both connected to the lifting platform 24. The first air inlet duct 311 and the first air outlet duct 321 are located above the lifting platform 24, and the second air inlet duct 312 and the second air outlet duct 322 are located below the lifting platform 24.

[0077] The first air inlet duct 311 and the first air outlet duct 321 are flexible pipes, while the second air inlet duct 312 and the second air outlet duct 322 are rigid pipes. The flexible pipes compensate for the thermal expansion displacement of the heater 42 during heating and cooling, as well as minor offsets caused by equipment vibration, preventing stress from being transferred to the rigid pipes or the battery 1 body. The mechanical vibration generated by the wind heating mechanism 4 is attenuated by the flexible material of the hose, reducing the impact on the downstream rigid pipes and battery 1. At the same time, the flexible pipes support the lifting platform 24 to drive the air inlet duct 31 and the air outlet duct 32 up or down. The rigid pipes are rigidly locked to the air holes of the battery 1 to ensure that the airflow interface does not deform under high temperature and high pressure, maintaining the sealing and directional flow field stability.

[0078] Furthermore, the air inlet 12 or the air outlet 13 and the liquid injection hole of the existing cover plate structure can have the same structure, thereby reducing the complexity of the cover plate structure.

[0079] In another embodiment, Figure 7 and Figure 8 As shown, the outlet duct 32 is fixedly connected to the outlet port 13, and the inlet duct 31 is connected to the lifting platform 24. The lifting platform 24 is used to drive the inlet duct 31 to connect or disconnect with the housing 11 during the lifting process. In this embodiment, one end of the outlet duct 32 is fixedly connected to the outlet port 13, and the other end is connected to the vacuum negative pressure mechanism 5. The vacuum negative pressure mechanism is located at the same height as the battery 1, or lower than the battery 1. The inlet duct 31 includes a first inlet duct 311 (a flexible connection) and a second inlet duct 312 (a rigid connection). The first and second inlet ducts 311, 312 are connected by a connecting pipe 33, which is connected to the lifting platform 24, thus connecting the inlet duct 31 to the lifting platform 24. The first inlet duct 311 is located above the lifting platform 24, while the second inlet duct 312 is located below the lifting platform 24. The flexible connection supports the lifting platform 24 in driving the inlet duct 31 to rise or fall. The air inlet 12 and the air outlet 13 on the battery housing 11 are symmetrically positioned to prevent gas from becoming turbulent inside the battery cell.

[0080] The outlet duct 32 is fixedly connected to the battery 1, and the lifting platform 24 only drives the intake duct 31 up or down. When the controller 6 receives a start command, it drives the lifting cylinder 23 to extend or retract via the lifting power supply device 22, lowering the lifting platform 24 until the intake duct 31 docks with the housing 11. When it determines that the battery 1 has cooled, the controller 6 drives the lifting cylinder 23 to extend or retract via the lifting power supply device 22, raising the lifting platform 24 until the intake duct 31 is free of the housing 11. The fixed connection between the outlet duct 32 and the battery 1 enhances the stability of the connection and reduces the possibility of connection errors.

[0081] In some embodiments, the battery baking apparatus further includes a battery positioning fixture 25 mounted on the bottom of the baking oven 2. The battery positioning fixture 25 is used to clamp the battery 1, keeping the battery 1 stationary. The connection to the air inlet 12 or air outlet 13 is controlled solely by the raising and lowering of the airway connection mechanism 3, thereby reducing connection risks. Furthermore, the battery positioning fixture 25 secures the position of the battery 1, ensuring that the air inlet 12 and the air inlet duct 31 on the battery housing 11 are aligned, and that the air outlet 13 and the air outlet duct 32 are aligned. This linear layout eliminates local sources of resistance, such as elbows and constrictions, ensuring smooth axial airflow.

[0082] In some embodiments, as Figure 4 As shown, the wind heating mechanism 4 includes a fan power supply device 41, a heater 42, and a filter 43. The fan power supply device 41 is used to provide kinetic energy gas. The fan power supply device 41 is installed outside the sealed cavity 21 and passes through the sealed cavity 21 to connect to the heater 42. The heater 42 heats the kinetic energy gas provided by the fan power supply device 41. The output end of the heater 42 is connected to the intake duct 31 through the filter 43. The filter 43 filters the heated kinetic energy gas and provides clean hot air energy at a specific temperature to the intake duct 31. During the cooling process of the battery 1, only the fan power supply device 41 is activated, and the heater 42 is turned off. At this time, the fan power supply device 41 is connected to the intake duct 31 through the filter 43, providing cold air to the intake duct 31 to cool the battery 1.

[0083] In some embodiments, as Figure 6 As shown, the vacuum negative pressure mechanism 5 includes a vacuum power supply device 51, a vacuum valve 52, and a vacuum gauge 53. The output end of the vacuum power supply device 51 is connected to the outlet pipe 32 through the vacuum valve 52 and the vacuum gauge 53. The vacuum power supply device 51 is a power facility that can provide vacuum negative pressure. The vacuum valve 52 controls the vacuum power level, and the vacuum gauge 53 can check the vacuum level. Since the vacuum power mechanism is connected to the battery chamber through the outlet pipe 32, the pressure level within the battery chamber can also be determined through the vacuum gauge 53.

[0084] In some embodiments, thermal insulation cotton may be provided on the outside of the baking oven 2 to isolate the temperature inside the device from the outside and ensure that the temperature does not spread outward.

[0085] The present invention provides a battery baking device for baking a battery 1. The battery 1 includes a shell 11 with a battery cavity and a battery cell arranged in the battery cavity. The shell 11 is provided with an air inlet 12 and an air outlet 13. The air inlet 12 and the air outlet 13 are both connected to the battery cavity. The battery baking device includes a baking oven 2, an air duct connecting mechanism 3, a wind heating mechanism 4, a vacuum negative pressure mechanism 5 and a controller 6; the baking oven 2 has a sealed cavity 21 for accommodating the battery 1; the air duct connecting mechanism 3 includes an air inlet pipe 31 and an air outlet pipe 32; the output end of the wind heating mechanism 4 is used to connect to the air inlet 12 through the air inlet pipe 31 and output cold air or hot air to the battery cavity; the vacuum negative pressure mechanism 5 is used to connect to the air outlet 13 through the air outlet pipe 32; the wind heating mechanism 4 and the vacuum negative pressure mechanism 5 are both electrically connected to the controller 6, and the controller 6 is configured to: control the working states of the wind heating mechanism 4 and the vacuum negative pressure mechanism 5 to adjust the pressure state of the battery cavity. The present invention adjusts the battery baking from the existing external radiation heating to internal hot air convection heating. The hot air directly enters the battery cavity through the air inlet duct 31 and the air outlet duct 32. That is, the hot air is in direct contact with the battery cells for heat transfer, which can effectively overcome the limitations of traditional thermal radiation heating, reduce the heat conduction path and thermal inertia, quickly increase the temperature and accelerate the heat dissipation efficiency in the cooling stage, thereby improving the uniformity of the moisture baking of the battery cells.

[0086] It should be noted that in the present invention, unless otherwise specified, the directions or positional relationships or dimensions indicated by the directional words such as "up, down, left, right", etc. are based on the directions or positional relationships or dimensions shown in the accompanying drawings. These terms are used only for the convenience of description and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present disclosure.

[0087] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0088] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0089] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0090] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0091] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A battery baking device for baking batteries, characterized in that: The battery (1) comprises a housing (11) with a battery cavity and a battery cell arranged in the battery cavity, the housing (11) is provided with an air inlet (12) and an air outlet (13), the air inlet (12) and the air outlet (13) both being connected to the battery cavity, and the battery baking device comprises: A baking oven (2) having a sealed cavity (21) for accommodating the battery (1); An airway connecting mechanism (3), comprising an air inlet pipe (31) and an air outlet pipe (32); A wind heating mechanism (4), the output end of which is used to connect to the air inlet (12) through the air inlet duct (31) and output cold air or hot air to the battery cavity; A vacuum negative pressure mechanism (5) is used to connect the air outlet (13) via the air outlet pipe (32); The controller (6) is electrically connected to the wind heating mechanism (4) and the vacuum negative pressure mechanism (5). The controller (6) is configured as follows: The working states of the wind heating mechanism (4) and the vacuum negative pressure mechanism (5) are controlled to adjust the pressure state of the battery cavity.

2. The battery baking equipment according to claim 1, characterized in that: The controller (6) is configured to control the working states of the wind heating mechanism (4) and the vacuum negative pressure mechanism (5) to adjust the pressure state of the battery chamber, including: When it is determined that the current temperature in the sealed cavity (21) has not reached a preset temperature, the wind heating mechanism (4) is controlled to output hot air to the battery cavity through the air inlet (12), so that the cold air in the battery cavity is discharged through the air outlet (13) and the battery cavity is in a positive pressure state to preheat the battery cell; When it is determined that the current temperature in the sealed cavity (21) reaches a preset temperature, the working states of the wind heating mechanism (4) and the vacuum negative pressure mechanism (5) are controlled according to the current temperature of the sealed cavity (21) and the current pressure in the battery cavity, so that the battery cavity is in a negative pressure state to perform battery cell baking.

3. The battery baking equipment according to claim 2, characterized in that: The controller (6) is configured to control the working states of the wind heating mechanism (4) and the vacuum negative pressure mechanism (5) according to the current temperature of the sealed cavity (21) and the current pressure in the battery cavity, including: Determining that the current pressure in the battery chamber is within a preset pressure range, controlling the vacuum negative pressure mechanism (5) to reduce vacuum discharge power so that the current pressure is maintained within the preset pressure range; Determining that the current pressure in the battery chamber does not reach the preset pressure, controlling the vacuum negative pressure mechanism (5) to increase the vacuum discharge power until the current pressure is within the preset pressure range; Determining that the current temperature in the sealed cavity (21) is within a preset temperature range, and controlling the wind heating mechanism (4) to reduce the heating power so that the current temperature is maintained at the preset temperature; It is determined that the current temperature in the sealed cavity (21) is not within a preset temperature range, and the wind heating mechanism (4) is controlled to increase the heating power until the current temperature is within the preset temperature range.

4. The battery baking equipment according to any one of claims 1 to 3, characterized in that: The controller (6) is further configured to: After confirming that the battery cell baking is completed, the wind heating mechanism (4) is controlled to output cold air to the battery cavity through the air inlet (12), and the vacuum negative pressure mechanism (5) is controlled to discharge hot air to the battery cavity through the air outlet (13), thereby cooling the battery (1) with cold air.

5. The battery baking equipment according to any one of claims 1 to 3, characterized in that: The battery baking equipment also includes: A lifting power supply device (22) is installed outside the sealed cavity (21); a lifting platform (24), the airway connecting mechanism (3) being fixed on the lifting platform (24); The lifting cylinder (23) is vertically arranged, and a first end thereof passes through the baking oven (2) and is connected to the lifting power supply device (22), and a second end thereof is connected to the lifting platform (24). The lifting power supply device (22) is electrically connected to the controller (6), and the controller (6) is configured as follows: When it is determined that a start command has been received, the lifting cylinder (23) is driven to extend and retract by the lifting power supply device (22), so that the lifting platform (24) is lowered until the airway connection mechanism (3) docks with the housing (11); When it is determined that the battery (1) has been cooled, the lifting cylinder (23) is driven to extend and retract by the lifting power supply device (22), so that the lifting platform (24) rises until the airway connection mechanism (3) is separated from the housing (11).

6. The battery baking equipment according to claim 5, characterized in that: The air outlet pipe (32) is fixedly connected to the air outlet hole (13), and the air inlet pipe (31) is connected to the lifting platform (24). The lifting platform (24) is used to drive the air inlet pipe (31) to dock with or detach from the shell (11) during the lifting process.

7. The battery baking equipment according to claim 5, characterized in that: The air inlet pipe (31) and the air outlet pipe (32) are both connected to the lifting platform (24), and the lifting platform (24) is used to drive the air inlet pipe (31) and the air outlet pipe (32) to dock with or detach from the shell (11) during the lifting process.

8. The battery baking equipment according to any one of claims 1 to 3, characterized in that: The battery baking equipment further comprises a battery positioning tool (25) installed at the bottom of the baking box (2), and the battery positioning tool (25) is used to clamp the battery (1).

9. The battery baking equipment according to any one of claims 1 to 3, characterized in that: The wind heating mechanism (4) comprises: A fan power supply device (41); A heater (42), wherein the fan power supply device (41) is installed outside the closed cavity (21) and passes through the closed cavity (21) to be connected to the heater (42); A filter (43), wherein the output end of the heater (42) is connected to the air intake pipe (31) through the filter (43).

10. The battery baking equipment according to any one of claims 1 to 3, characterized in that: The vacuum negative pressure mechanism (5) comprises a vacuum power supply device (51), a vacuum valve (52) and a vacuum gauge (53); the output end of the vacuum power supply device (51) is connected to the air outlet pipe (32) via the vacuum valve (52) and the vacuum gauge (53) in sequence.

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