Battery drying device, battery drying system and battery production line

Abstract

The utility model provides a battery drying device, a battery drying system and a battery production line. The battery drying device comprises a tray used for accommodating at least one battery; the alternating current power supply is used for being electrically connected with the battery on the tray and providing alternating current, so that the battery emits heat from the inside; and the vacuumizing device is used for being communicated with a liquid injection hole of the battery so as to vacuumize the interior of the battery. The alternating current power supply is electrically connected with the battery, and alternating current is introduced into the battery, so that the battery is used as a capacitor, the battery is heated, the process of air heat conduction or contact heat conduction is reduced, and the heating efficiency is greatly improved. And meanwhile, the cavity in the battery is directly vacuumized through the vacuumizing device, so that a high-vacuum state can be quickly achieved, the drying efficiency is greatly improved, and the energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery drying device, a battery drying system and a battery production line. Background Art

[0002] Polymer battery, also known as polymer battery, is a kind of battery with chemical properties. Such as lithium-ion battery and sodium-ion battery in the current new energy industry. The battery is mainly composed of positive electrode, negative electrode, electrolyte and shell. Polymer battery refers to a battery system in which at least one or more of the three elements of positive electrode, negative electrode and electrolyte are made of polymer materials. This type of battery is particularly sensitive to moisture and residual auxiliary solvents in the process (such as N-methylpyrrolidone, referred to as NMP), so the humidity must be strictly controlled during the production process of the battery, especially before filling the liquid, the moisture and residual process auxiliary solvents in the battery core must be removed. Therefore, in the production process of the battery, before filling the electrolyte, the battery needs to be transported to a drying oven for baking and drying to reduce the moisture content of the battery core and the residual process auxiliary solvent, and avoid the electrolyte after the injection. Side reactions with water and residual process auxiliary solvents affect the battery's cycle performance and safety.

[0003] At present, the battery drying process is to place multiple battery coils that have not yet been filled with liquid into an oven, use hot air or clamp contact heating through a large integral oven cavity, and at the same time evacuate the inside of the oven to evaporate the moisture.

[0004] However, the above-mentioned drying process causes the heating time between the positive and negative electrode layers of the battery core to be inconsistent, and the heat is transferred from the outside to the inside, resulting in a longer baking time; at the same time, due to the large cavity of the oven, the energy consumption for heat dissipation, temperature and pressure equalization is high, which seriously affects the overall production efficiency and manufacturing cost of the battery. Utility Model Content

[0005] The utility model aims to provide a battery drying device, a battery drying system and a battery production line to improve the drying efficiency of the battery.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solution: a battery drying device for drying batteries, the battery drying device comprising:

[0007] a tray for accommodating at least one of the batteries;

[0008] An AC power source, used to be electrically connected to the battery on the tray and provide an alternating current to make the battery generate heat from the inside;

[0009] A vacuum device is used to communicate with the liquid injection hole of the battery to vacuum the interior of the battery.

[0010] In one embodiment, the battery drying device further comprises at least two electrical connectors, and the electrical connectors are used to connect the AC power source and the batteries on the tray to form an electrical circuit; and / or,

[0011] The electrical connector is used to connect multiple batteries on the tray so that the multiple batteries are connected in series or in parallel.

[0012] In one embodiment, there are multiple batteries, and the multiple batteries are connected in series through the electrical connector. The head electrode and the tail electrode of the whole formed by the multiple batteries connected in series are respectively connected to the AC power source through the electrical connector.

[0013] In one embodiment, the battery drying device further includes a cooling device, and the cooling device is used to cool the electrical connector.

[0014] In one embodiment, a cooling channel is provided inside the electrical connector, and the cooling device includes a refrigeration component and a cooling pipe assembly. The refrigeration component is used to provide a cooling medium and connect the cooling pipe assembly. Multiple cooling pipes of the cooling pipe assembly are connected to the cooling channel to form a cooling circuit.

[0015] In one embodiment, the cooling device includes a refrigeration element and a cooling tube assembly, wherein the refrigeration element is used to provide a cooling medium and connect the cooling tube assembly to form a cooling circuit, and a plurality of cooling tube portions of the cooling tube assembly are wound around the outer circumference of the electrical connector.

[0016] In one embodiment, a plurality of liquid injection holes of the battery are arranged in parallel through pipelines and are all connected to the vacuum extraction device.

[0017] In one embodiment, the tray is provided with at least one receiving slot for receiving and positioning the battery.

[0018] In one embodiment, the battery drying device further includes a temperature detection element, and the temperature detection element is used to detect the temperature of the battery.

[0019] The utility model also provides a battery drying system, comprising the battery drying device as described above.

[0020] In one embodiment, the battery drying system further includes a loading storage device, a transfer device, and a unloading storage device;

[0021] The loading storage device, the battery drying device and the unloading storage device are arranged in sequence from upstream to downstream, and the transfer device is movable back and forth along the upstream to downstream direction, and is used to transfer the batteries on the loading storage device to the tray of the battery drying device, and to transfer the batteries in the tray of the battery drying device to the unloading storage device.

[0022] The utility model also provides a battery production line, comprising the battery drying system as described above.

[0023] It can be seen from the above technical solution that the utility model has at least the following advantages and positive effects:

[0024] The battery drying device of the utility model is electrically connected to the battery through an AC power supply, and an AC current is passed into the battery, that is, the battery is used as a capacitor to make the battery itself generate heat, reduce the process of air heat conduction or contact heat conduction, and greatly improve the heating efficiency. At the same time, the vacuum device directly evacuates the cavity inside the battery. Compared with the scheme of evacuating the oven in the related art, directly evacuating the space inside the battery can quickly reach a high vacuum state, greatly improve the drying efficiency, and reduce energy consumption.

[0025] The battery drying system adopts the battery drying device, which greatly improves the drying efficiency. In addition, the battery drying system has a high degree of automation and reduces labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a battery in the utility model.

[0027] Figure 2 It is a schematic diagram of the battery drying device in the utility model.

[0028] Figure 3 The utility model is a schematic flow chart of a drying method for drying batteries by a battery drying device.

[0029] Figure 4 It is a schematic diagram of one embodiment of the battery drying system in the utility model.

[0030] The following are the descriptions of the reference numerals:

[0031] 1. Battery; 11. Shell; 12. Positive electrode; 13. Negative electrode; 14. Liquid injection hole;

[0032] 2. Battery drying device; 21. Tray; 22. AC power supply; 23. Vacuum extraction device; 241. Refrigeration component; 242. Cooling pipe; 25. Electrical connector;

[0033] 3. Loading storage device; 4. Unloading storage device; 5. Transfer device. DETAILED DESCRIPTION

[0034] Although the present invention can be easily embodied as embodiments of different forms, only some of the specific embodiments are shown in the drawings and described in detail in this specification. It should be understood that this description should be regarded as an exemplary description of the principles of the present invention and is not intended to limit the present invention to that described herein.

[0035] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the utility model, rather than implying that each embodiment of the utility model must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0036] In the embodiments shown in the drawings, the indications of directions (such as up, down, left, right, front and back) used to explain the structure and movement of various elements of the utility model are not absolute but relative. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.

[0037] The utility model provides a battery drying device, which is used for drying batteries. The battery drying device specifically dries a battery coil core. During drying, no electrolyte is injected into the battery coil core.

[0038] The battery drying device provides alternating current, treating the battery core as a capacitor, thereby generating heat, which is heated directly from the inside of the battery core, achieving synchronous and rapid heating of the positive and negative electrodes of each layer of the battery core, improving drying efficiency, and reducing battery manufacturing costs.

[0039] Hereinafter, the battery roll core will be simply referred to as the battery.

[0040] Figure 1 A schematic diagram of the battery is shown in Figure 1 The battery 1 includes a housing 11, a positive electrode 12 and a negative electrode 13. Specifically, the positive electrode 12 and the negative electrode 13 are arranged on the housing 11. The housing 11 is also provided with a liquid injection hole 14 for injecting electrolyte. A core body is arranged inside the housing 11.

[0041] Figure 2 A schematic diagram of a battery drying device 2 is shown, see Figure 2The battery drying device 2 includes a tray 21, an AC power source 22, and a vacuum device 23. The tray 21 is used to accommodate at least one battery 1. The AC power source 22 is used to electrically connect to the battery 1 on the tray 21 and provide an alternating current to make the battery 1 heat up from the inside. The vacuum device 23 is connected to the injection hole 14 of the battery 1 to vacuum the inside of the battery 1.

[0042] The tray 21 is provided with a receiving groove for receiving and positioning the battery 1. The opening of the receiving groove faces upward.

[0043] Specifically, there are multiple accommodating slots, which can be arranged in a single row with multiple columns, or in an array with multiple rows and multiple columns, depending on actual needs.

[0044] The AC power source 22 is a high-frequency power source, and the frequency of the alternating current is 30 to 2000 kHz.

[0045] The battery drying device 2 further includes at least two electrical connectors 25. The electrical connectors 25 are used to connect the AC power source 22 and the batteries 1 on the tray 21 to form an electrical circuit.

[0046] The two electrical connectors 25 are respectively electrically connected to the two poles of the AC power source 22 , and the two electrical connectors 25 are respectively electrically connected to the two poles of the battery 1 on the tray 21 , thereby realizing the electrical connection between the AC power source 22 and the battery 1 and forming a loop.

[0047] Specifically in this embodiment, the two poles of the AC power source 22 are respectively disposed at opposite ends of the AC power source 22 , and the two electrical connectors are respectively connected to the two poles of the AC power source 22 and extend to opposite sides of the tray 21 to be electrically connected to the battery 1 on the tray 21 .

[0048] The number of batteries 1 on the tray 21 can be one, two, three, or multiple of other numbers, depending on actual needs. The number of batteries 1 is preferably 2 to 8.

[0049] The electrical connector is used to connect the multiple batteries 1 on the tray 21 so that the multiple batteries 1 are connected in series or in parallel.

[0050] Exemplarily, when multiple batteries 1 are connected in series, the battery 1 located upstream and the battery 1 located downstream of two adjacent batteries 1 are electrically connected through the electrical connector 25, and are connected in sequence in the above manner, so that the battery 1 located at the head end and the battery located at the tail end each have an electrode free for connection with the two electrical connectors 25 at the AC power source 22. That is, when there is only one battery 1, the two electrical connectors 25 are respectively connected to the two poles of the battery 1, and the two electrical connectors 25 are respectively connected to the two poles of the AC power source 22. When there are multiple batteries 1, multiple batteries 1 are connected in series through the electrical connector 25, and then the two electrical connectors 25 are respectively connected to the head end electrode and the tail end electrode of the whole formed by connecting multiple batteries 1 in series and the AC power source 22.

[0051] When multiple batteries 1 are connected in parallel, each battery 1 is electrically connected to the AC power source 22 via the electrical connector 25 to form a loop.

[0052] Specifically, the electrical connector 25 is a copper hollow electrical connector with high electrical conductivity.

[0053] The vacuum device 23 is connected to the injection hole 14 of the battery 1 to vacuum the inside of the battery 1. The vacuum device 23 is used to vacuum the inside of the battery 1 to 1-100 Pa. The battery 1 is regarded as a small cavity and directly vacuumed, which can quickly reach a high vacuum state, greatly improve the drying efficiency and reduce energy consumption.

[0054] Specifically, the vacuum device 23 may be a vacuum pump or a vacuum generator.

[0055] When there are multiple batteries 1, the multiple batteries 1 are arranged in parallel through pipelines, and are all connected to the vacuum device 23. That is, the vacuum device 23 vacuumizes the multiple batteries 1 at the same time.

[0056] Specifically, a main pipeline and a plurality of branch pipelines connected to the main pipeline are included between the vacuum pumping device 23 and the battery 1 . The main pipeline is connected to the vacuum pumping device 23 , and the plurality of branch pipelines are connected to the injection holes 14 of the plurality of batteries 1 in a one-to-one correspondence.

[0057] The battery drying device 2 also includes a cooling device for cooling the electrical connector 25 connected to the AC power source 22, that is, reducing the temperature of the electrical connector 25 due to heating after using the alternating current, avoiding the temperature of the electrical connector 25 being too high, and ensuring circuit safety.

[0058] Specifically, the cooling device includes a refrigeration element 241 and a cooling pipe assembly. The refrigeration element 241 is used to provide a cooling medium and is connected to the cooling pipe assembly. The refrigeration element 241 has an inlet and an outlet. The cooling pipe assembly includes a plurality of cooling pipes 242. Each cooling pipe 242 can be used for the circulation of the cooling medium.

[0059] In this embodiment, a cooling channel is provided inside the electrical connector 25. A plurality of cooling pipes 242 are connected to the cooling channel to form a cooling circuit. That is, a cooling pipe 242 connects the outlet of the refrigeration element 241 and the cooling channel of an electrical connector 25, and another cooling pipe 242 connects the cooling channel of the electrical connector 25 and the cooling channel of another electrical connector 25. After the connections are made in sequence, the cooling channel of the last battery 1 and the inlet of the refrigeration element 241 are connected through another cooling pipe 242, thereby forming a cooling circuit.

[0060] In other embodiments, in another solution for cooling the electrical connector 25, a plurality of cooling tubes are partially wound around the outer periphery of the electrical connector 25. That is, the cooling tubes 242 wound around the outer periphery of the electrical connector 25 absorb the heat on the electrical connector 25 when the cooling medium flows through, thereby reducing the temperature of the electrical connector 25.

[0061] In this embodiment, the cooling medium is water, and the refrigeration element 241 is used to provide water with a relatively low temperature, for example, water with a temperature of 4°C to 20°C.

[0062] In other embodiments, the cooling medium may be other cryogenic liquids or gases.

[0063] The battery drying device 2 also includes a temperature detection component, which is used to detect the temperature of the battery 1. The temperature detection component is connected to the AC power supply 22. Specifically, the battery drying device 2 includes a control component, the temperature detection component is connected to the control component, and the AC power supply 22 is connected to the control component, so that the temperature detection component and the AC power supply 22 are connected to each other.

[0064] The temperature detector sends the detected real-time temperature to the control component, which receives the real-time temperature and compares it with the preset temperature to output a control signal. The AC power supply 22 is used to receive the control signal and provide or stop providing alternating current to the battery 1 according to the control signal.

[0065] That is, when the temperature detection element detects that the real-time temperature of the battery 1 reaches the preset temperature, the AC power supply 22 stops supplying alternating current to the battery 1. When the temperature detection element detects that the real-time temperature of the battery is lower than the preset temperature, the AC power supply 22 supplies alternating current to the battery 1 for heating.

[0066] For example, the preset temperature may be 100° C. Through the cooperation between the temperature detection element and the AC power supply 22 , the temperature of the battery 1 is ensured to be stable within the range of 100±5° C.

[0067] Based on the above introduction, the battery drying device 2 of this embodiment is electrically connected to the battery 1 through the AC power supply 22, and a high-frequency alternating current is passed to the battery 1, that is, the battery 1 is used as a capacitor to make the battery 1 itself heat up, reduce the process of air heat conduction or contact heat conduction, and greatly improve the heating efficiency. At the same time, the cavity inside the battery 1 is directly evacuated through the vacuum device 23. Compared with the scheme of evacuating the oven in the related art, directly evacuating the space inside the battery 1 can quickly reach a high vacuum state, greatly improve the drying efficiency, and reduce energy consumption.

[0068] Figure 3 A schematic diagram showing a drying method for drying batteries using the drying device is shown. Figure 3 , the drying method comprises the following steps:

[0069] S1 . Place at least one battery 1 on a tray 21 .

[0070] Specifically, the batteries 1 to be dried are arranged on the tray 21 according to the number of batteries 1 to be dried. The arrangement is also carried out according to actual needs.

[0071] S2, connecting the liquid injection hole 14 of the battery 1 to a vacuum device 23.

[0072] When there are multiple batteries 1 , the multiple batteries 1 are arranged in parallel, and the injection holes 14 of each battery 1 are connected to the vacuum device 23 .

[0073] S3. Provide an AC power source 22 and electrically connect the AC power source 22 to at least one battery 1. The AC power source 22 provides an alternating current with a preset frequency to make the battery 1 generate heat from the inside.

[0074] Specifically, the preset frequency of the alternating current is 30-2000 kHz. The battery 1 is heated to 1-150° C. by the alternating current of this frequency.

[0075] S4, starting the vacuum device 23 to vacuum the interior of the battery 1.

[0076] The vacuum device 23 evacuates the interior of the battery 1 to a vacuum pressure of 1-100 Pa.

[0077] Furthermore, when heating the battery 1, the method further includes:

[0078] A cooling device is provided, and a cooling medium generated by the cooling device is used to reduce the temperature of the electrical connector 25 connecting the AC power source 22 and the battery 1. Specifically, after step S3, the cooling device is turned on to continuously output the cooling medium to reduce the temperature of the electrical connector 25, thereby avoiding burning of the positive and negative electrodes 13 of the battery 1.

[0079] Preferably, the temperature of the electrical connector 25 connecting the plurality of batteries 1 can also be lowered by the cooling medium generated by the cooling device.

[0080] It should be noted that step S3 and step S4 can be performed simultaneously, that is, turning on the AC power supply 22 and the vacuuming device 23 are simultaneously performed. Of course, vacuuming can be performed first and then turning on the AC power supply 22, or the AC power supply 22 can be turned on first and then vacuuming.

[0081] Furthermore, during the process of heating the battery 1 , when the temperature detection element detects that the real-time temperature of the battery 1 has reached a preset temperature, the AC power source 22 stops working, that is, stops providing alternating current to the battery 1 .

[0082] The above drying method heats the battery 1 from the inside, and the heating is more uniform, which not only has high drying efficiency but also better drying effect. In addition, the drying method is simple to operate and is worth promoting.

[0083] Within a certain frequency range of the alternating current, the heating time is positively correlated with the number of batteries 1 , and the heating time is positively correlated with the frequency of the alternating current.

[0084] The alternating current has a heating effect within a specific frequency range of 30 to 2000 kHz. The specific frequency value is related to the number and capacity of batteries.

[0085] The battery drying device 2 of the utility model can complete the drying of the battery 1 within 60 minutes, compared with the existing drying box which takes 10 to 32 hours to dry the battery, the efficiency can be improved by more than 90%.

[0086] The utility model also provides a battery drying system, which comprises the battery drying device mentioned above.

[0087] Specifically, Figure 4 A schematic diagram showing one embodiment of a battery drying system is shown. Figure 4 The utility model also provides a drying system, which includes a loading storage device 3, a transfer device 5, a unloading storage device 4 and a plurality of battery drying devices 2 as above.

[0088] The loading storage device 3, the battery drying device 2 and the unloading storage device 4 are arranged in sequence from upstream to downstream, and the transfer device 5 can be moved back and forth from upstream to downstream, and is used to transfer the battery 1 on the loading storage device 3 to the tray 21 of the battery drying device 2, and to transfer the battery 1 in the tray 21 of the battery drying device 2 to the unloading storage device 4.

[0089] The loading and storage device 3 includes a first conveyor belt, which conveys the batteries 1 from upstream to downstream.

[0090] The unloading storage device 4 includes a second conveyor belt, which conveys the batteries 1 from the upstream to the downstream direction.

[0091] A plurality of battery drying devices 2 are arranged between the upper material storage device 3 and the lower material storage device 4 in the longitudinal direction.

[0092] The transfer device 5 can move in a direction from upstream to downstream and back. In this embodiment, the transfer device 5 is a robot, which grabs the battery 1 through a mechanical arm.

[0093] The working process of the battery drying system is as follows:

[0094] The transfer device 5 transfers the battery 1 located in the loading storage device 3 to the battery drying device 2, and the battery drying device 2 dries the battery 1. After drying, the transfer device 5 transfers the dried battery 1 located in the tray 21 to the unloading storage device 4.

[0095] The direction from upstream to downstream is defined as the longitudinal direction, and the direction perpendicular to the longitudinal direction in the horizontal plane is defined as the transverse direction.

[0096] In this embodiment, the number of the first conveyor belts is two, and the two first conveyor belts are arranged at intervals in the transverse direction. The number of the second conveyor belts is two, and the two second conveyor belts are arranged at intervals in the transverse direction.

[0097] The plurality of battery drying devices 2 are arranged in two rows in the lateral direction, and each row includes a plurality of battery drying devices 2 .

[0098] Furthermore, the battery drying device 2 includes a plurality of trays 21, and the number of trays 21 is greater than the number of AC power supplies 22. The trays 21 can carry the batteries 1 during loading and unloading. Specifically, it is ensured that there are trays 21 on both the first conveyor belt of the loading storage device 3 and the second conveyor belt of the unloading storage device 4 to carry the batteries 1. The number of trays 21 greater than the number of AC power supplies 22 can be set according to actual needs.

[0099] That is, the tray 21 and the batteries 1 in the tray 21 are stored in the loading storage device 3, and the transfer device 5 transfers the tray 21 and the batteries 1 in the tray 21 as a whole to the AC power source 22 and the vacuum device 23, and then the AC power source 22 is electrically connected to the batteries 1 in the tray 21, and then the drying can be carried out. After the drying is completed, the transfer device 5 transfers the tray 21 and the batteries 1 in the tray 21 as a whole to the unloading storage device 4.

[0100] The battery drying system adopts the battery drying device 2, which greatly improves the drying efficiency. The battery drying system has a high degree of automation and reduces labor intensity.

[0101] The utility model also provides a battery production line, which comprises the above battery drying system.

[0102] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A battery drying device for drying batteries, characterized in that: The battery drying device comprises: a tray for accommodating at least one of the batteries; An AC power source, used to be electrically connected to the battery on the tray and provide an alternating current to make the battery generate heat from the inside; A vacuum device is used to communicate with the liquid injection hole of the battery to vacuum the interior of the battery.

2. The battery drying device according to claim 1, characterized in that: The battery drying device further comprises at least two electrical connectors, which are used to connect the AC power source and the batteries on the tray to form an electrical circuit; and / or, The electrical connector is used to connect multiple batteries on the tray so that the multiple batteries are connected in series or in parallel.

3. The battery drying device according to claim 2, characterized in that: There are multiple batteries, and the multiple batteries are connected in series through the electrical connector. The head electrode and the tail electrode of the whole formed by the multiple batteries connected in series are respectively connected to the AC power source through the electrical connector.

4. The battery drying device according to claim 2, characterized in that: The battery drying device further includes a cooling device, and the cooling device is used to cool the electrical connector.

5. The battery drying device according to claim 4, characterized in that: A cooling channel is provided inside the electrical connector. The cooling device includes a refrigeration component and a cooling pipe assembly. The refrigeration component is used to provide a cooling medium and connect the cooling pipe assembly. Multiple cooling pipes of the cooling pipe assembly are connected to the cooling channel to form a cooling circuit.

6. The battery drying device according to claim 4, characterized in that: The cooling device comprises a refrigeration element and a cooling tube assembly. The refrigeration element is used to provide a cooling medium and connect the cooling tube assembly to form a cooling circuit. A plurality of cooling tube portions of the cooling tube assembly are wound around the outer circumference of the electrical connector.

7. The battery drying device according to claim 1, characterized in that: The liquid injection holes of the plurality of batteries are arranged in parallel through pipelines and are all connected to the vacuum extraction device.

8. The battery drying device according to claim 1, characterized in that: The tray is provided with at least one receiving slot for receiving and positioning the battery.

9. The battery drying device according to claim 1, characterized in that: The battery drying device further includes a temperature detection element, and the temperature detection element is used to detect the temperature of the battery.

10. A battery drying system, characterized in that: A battery drying device comprising the battery drying device according to any one of claims 1 to 9.

11. The battery drying system according to claim 10, characterized in that: The battery drying system also includes a loading storage device, a transfer device and a unloading storage device; The loading storage device, the battery drying device and the unloading storage device are arranged in sequence from upstream to downstream, and the transfer device is movable back and forth along the upstream to downstream direction, and is used to transfer the batteries on the loading storage device to the tray of the battery drying device, and to transfer the batteries in the tray of the battery drying device to the unloading storage device.

12. A battery production line, characterized in that: Comprising the battery drying system as claimed in claim 10 or 11.

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