Battery infiltration device

Abstract

The utility model discloses a battery infiltration device which is suitable for infiltrating a battery cell by electrolyte of a battery. The battery infiltration device comprises an infiltration box, an ultrasonic assembly and a tray; the infiltration box is provided with a liquid storage cavity suitable for containing liquid. The ultrasonic assembly is connected with the infiltration box; and the tray is partially immersed in the liquid and is suitable for limiting the battery cell. The battery infiltration device is good in infiltration effect.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery infiltration device. Background Art

[0002] In the process of infiltrating the battery cell with electrolyte, the infiltration effects of high temperature infiltration and high pressure infiltration are poor. Utility Model Content

[0003] The utility model aims to provide a battery infiltration device to solve the problem of poor infiltration effect of high-temperature infiltration and high-pressure infiltration.

[0004] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0005] The utility model provides a battery infiltration device, which is suitable for making the electrolyte of the battery infiltrate the battery core; the battery infiltration device comprises:

[0006] An infiltration box having a liquid storage cavity suitable for containing liquid;

[0007] An ultrasonic component connected to the infiltration tank;

[0008] The tray is partially immersed in the liquid and is suitable for limiting the position of the battery cell.

[0009] In one embodiment, the battery includes a shell, the battery cell is suitable for being accommodated in the shell, the battery cell is a laminated battery cell, and the tray is suitable for clamping the shell so that the shell clamps the battery cell.

[0010] In one embodiment, the tray has a plurality of clamping positions, each of which is suitable for clamping one of the batteries.

[0011] In one embodiment, the battery infiltration device further includes a liquid level detector, which is connected to the infiltration tank and is suitable for detecting the liquid level of the liquid in the liquid storage chamber.

[0012] In one embodiment, the battery further comprises an end cover, the end cover is connected to the outer shell of the battery, and the end cover is provided with a liquid injection hole;

[0013] The battery wetting device further comprises a liquid discharge member, and when the liquid level detector detects that the liquid level in the liquid storage chamber is flush with the liquid injection hole, the liquid discharge member discharges the liquid in the liquid storage chamber.

[0014] In one embodiment, the battery infiltration device further includes a liquid adding component, and when the liquid level detector detects that the liquid level in the liquid storage chamber is lower than the liquid injection hole and the liquid level is less than or equal to a preset value, the liquid adding component provides liquid to the liquid storage chamber.

[0015] In one embodiment, a control component is further included, which is electrically connected to the liquid level detector, the liquid adding component and the liquid discharging component, and is suitable for receiving the liquid level information detected by the liquid level detector and controlling whether the liquid adding component and the liquid discharging component are working.

[0016] In one embodiment, the battery impregnation device further includes an elastic member, one end of the elastic member is elastically connected to the impregnation box, and the other end of the elastic member is elastically connected to the tray.

[0017] In one embodiment, the ultrasonic component includes a generator and a transducer, wherein the generator is adapted to generate a high-frequency oscillation signal, and the transducer is adapted to convert the high-frequency oscillation signal into a high-frequency mechanical vibration and transmit the vibration to the liquid.

[0018] In one embodiment, the battery infiltration device further includes a dryer, which is connected to the infiltration tank and spaced apart from the liquid, and is suitable for drying the outer surface of the battery.

[0019] The battery infiltration device of the utility model realizes ultrasonic infiltration by setting an ultrasonic component, and at the same time, the tray limits the battery. Therefore, in the process of electrolyte infiltrating the battery cell, the tray indirectly limits the relative movement of the diaphragm and the positive and negative electrode sheets in the battery cell during the ultrasonic process. Therefore, the battery infiltration device of the utility model has a good infiltration effect, can significantly improve the infiltration efficiency of the electrolyte, increase the contact area between the electrode and the electrolyte, improve the charge transfer efficiency, and improve the cycle performance and life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a schematic diagram of a battery impregnation device according to an embodiment.

[0022] Description of reference numerals:

[0023] 100-battery infiltration device, 10-infiltration box, 11-liquid storage chamber, 20-ultrasonic component, 21-generator, 22-transducer, 30-tray, 31-clamping position, 40-battery, 41-housing, 42-end cover, 43-liquid injection hole, 44-pole, 50-liquid level detector, 60-elastic member, 61-connecting member, 70-dryer. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0026] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0027] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0028] For reference Figure 1 The utility model provides a battery infiltration device 100, which is suitable for making the electrolyte of the battery 40 infiltrate the battery cell. The battery infiltration device 100 includes an infiltration box 10, an ultrasonic component 20 and a tray 30. The infiltration box 10 has a liquid storage chamber 11, which is suitable for containing liquid. The ultrasonic component 20 is connected to the infiltration box 10. The tray 30 is partially immersed in the liquid and is suitable for limiting the battery cell.

[0029] The material of the infiltration box 10 can be high-strength plastic, stainless steel, etc. The high-strength plastic can specifically be polypropylene (PP), polytetrafluoroethylene (PTFE), high-density polyethylene (HDPE), etc., so that the infiltration box 10 can withstand corrosion, pressure changes and possible temperature changes of the internal liquid.

[0030] The shape of the liquid storage chamber 11 can be rectangular, spherical, etc., without limitation. The liquid stored can be water.

[0031] The material of the tray 30 may be the same as that of the infiltration box 10 or may be different from that of the infiltration box 10. Specifically, the material of the tray 30 may be stainless steel, polypropylene, aluminum alloy, etc., without limitation.

[0032] For reference Figure 1, the X direction is the width direction of the battery 40 , the Y direction is the thickness direction of the battery 40 , and the Z direction is the length direction of the battery 40 .

[0033] The battery 40 may be a soft pack battery 40 or a laminated battery 40, etc., without limitation. When the battery 40 is a soft pack battery 40, the tray 30 has a limiting effect on the battery 40. When the battery 40 is a laminated battery 40, the limiting effect of the tray 30 on the battery 40 also includes a restraining effect.

[0034] The battery infiltration device 100 of the present invention limits the battery 40 by the tray 30 during ultrasonic infiltration. Therefore, during the process of electrolyte infiltrating the battery cell, the tray 30 indirectly limits the relative movement of the diaphragm and the positive and negative electrode sheets in the battery cell during the ultrasonic process. Therefore, the battery infiltration device 100 of the present invention has a good infiltration effect, can significantly improve the infiltration efficiency of the electrolyte, increase the contact area between the electrode and the electrolyte, improve the charge transfer efficiency, and improve the cycle performance and life of the battery 40.

[0035] The existing ultrasonic infiltration device can quickly infiltrate the electrode of the battery cell with the electrolyte, but the electrolyte of the laminated battery 40 has the risk of diaphragm wrinkles and electrode alignment bias during the process of infiltrating the battery cell using ultrasonic infiltration technology. Diaphragm wrinkles will hinder the transfer path of lithium ions between the positive and negative electrodes, and a stable SEI film (solid electrolyte interface film) cannot be formed on the surface of the electrode active material, affecting the capacity of the battery cell, increasing the electrode impedance, and affecting the cycle life and safety performance of the battery cell. The bias in the alignment of the electrode will lead to the risk of the positive electrode wrapping the negative electrode. During the charging process, the lithium ions in the positive electrode will be reduced to lithium, and will continue to accumulate to form lithium dendrites, piercing the diaphragm between the positive and negative electrodes, causing a short circuit and affecting the safety performance of the battery cell.

[0036] For reference Figure 1 In one embodiment, the battery 40 includes a shell 41, the battery cell is suitable for being accommodated in the shell 41, the battery cell is a laminated battery cell, and the tray 30 is suitable for clamping the shell 41 so that the shell 41 clamps the battery cell.

[0037] The laminated battery cell includes a plurality of small battery cells formed by positive electrodes, negative electrodes and separators stacked in sequence along the Y direction. The plurality of small battery cells are accommodated in the housing 41 and are stacked and connected in parallel along the Y direction to form a laminated battery cell.

[0038] Optionally, the shell 41 is a material with high structural strength, specifically metal materials, high-strength plastics, ceramics, etc. The plastic materials may be polyethylene (PE), polypropylene (PP), polystyrene (PS) and polycarbonate (PC), etc. The metal materials may be aluminum, aluminum alloy, magnesium alloy, iron and iron alloy, etc. The shell 41 includes a bottom plate and a side plate. The shell 41 may be an integrated structure, that is, the bottom plate and the side plate are an integrated structure made by an integrated molding process. The integrated molding process may be stamping, casting, etc., without limitation. The shell 41 may also be a split structure, and the side plate and the bottom plate may be connected and fixed by welding, bonding, clamping, screwing, etc. The wall thickness of the shell 41 may be roughly uniform at various locations, that is, the thickness of the side plate may be roughly uniform, and the thickness of the bottom plate and the side plate may also be roughly the same.

[0039] The tray 30 clamps the outer shell 41 of the battery 40 so that the tray 30 has a restraining force on the battery 40, and clamps the outer shell 41 of the battery 40 to limit the diaphragm and pole piece of the battery cell, thereby avoiding problems such as diaphragm wrinkles and pole piece alignment bias in the battery cell during the ultrasonic process.

[0040] For reference Figure 1 In one embodiment, the tray 30 has a plurality of clamping positions 31 , each clamping position 31 being suitable for clamping a battery 40 .

[0041] The tray 30 includes a plate body and a limiting member, wherein the limiting members are multiple and spaced apart. A clamping position 31 is formed between two adjacent limiting members, and the clamping position 31 receives and clamps the battery 40 .

[0042] The tray 30 may be an integrated structure, that is, an integrated structure prepared by an integrated process, that is, an integrated structure formed by injection molding, casting, stamping, etc.

[0043] The tray 30 includes a plate body and a limiting member, wherein the limiting members are multiple and arranged at intervals. A clamping position 31 is formed between two adjacent limiting members, and the clamping position 31 accommodates and clamps the battery 40 .

[0044] Optionally, when the plate body and the limiting member are an integrated structure, the restraining force of the clamping position 31 formed by two adjacent limiting members on the battery 40 remains unchanged; when the plate body and the limiting member are a split structure and the limiting member can move relative to the plate body, the restraining force of the clamping position 31 formed by two adjacent limiting members on the battery 40 can be adjusted by changing the distance between the limiting members.

[0045] The clamping position 31 clamps the outer shell 41 of the battery 40 to limit the diaphragm and the pole piece of the battery cell, thereby avoiding problems such as diaphragm wrinkles and pole piece alignment deviation in the battery cell during the ultrasonic process. In addition, multiple clamping positions 31 can improve the work efficiency of battery 40 production.

[0046] For reference Figure 1In one embodiment, the battery infiltration device 100 further includes a liquid level detector 50 , which is connected to the infiltration tank 10 , and is suitable for detecting the liquid level of the liquid in the liquid storage chamber 11 .

[0047] Optionally, the liquid level detector 50 may be a float type liquid level switch, an ultrasonic liquid level detector 50, a radar liquid level meter, a capacitance liquid level meter, etc., without limitation.

[0048] The liquid level detector 50 is connected to the side wall of the liquid storage chamber 11 , and the connection method can be screw connection, welding, clamping connection, bonding, etc., without limitation.

[0049] A liquid level detector 50 is provided to detect the liquid level in the infiltration box 10 in real time, and to perform related work such as liquid discharge or liquid inlet, so as to achieve a better effect of ultrasonic infiltration.

[0050] For reference Figure 1 In one embodiment, the battery 40 further includes an end cover 42, which is connected to the housing 41 and has a liquid injection hole 43. The battery immersion device 100 further includes a liquid discharge member, and when the liquid level detector 50 detects that the liquid level in the liquid storage chamber 11 is flush with the liquid injection hole 43, the liquid discharge member discharges the liquid in the liquid storage chamber 11.

[0051] The material of the end cap 42 can be the same as that of the housing 41. Specifically, the end cap 42 can be made of metal, high-strength plastic, ceramic, etc., without limitation. The connection method between the end cap 42 and the housing 41 can be welding, bonding, etc., without limitation.

[0052] The shape of the injection hole 43 can be circular, rectangular, elliptical, etc., without limitation. Specifically, before the battery 40 performs the process of infiltrating the battery cell with electrolyte, a sealant is required to seal the injection hole 43 to prevent the electrolyte from flowing to the outside of the battery 40 during the infiltration process. The sealant can be plastic, rubber, etc., and the sealant is arranged corresponding to the injection hole 43.

[0053] A pole 44 is also disposed on the end cover 42 . In the X direction, the liquid injection hole 43 is farther away from the bottom wall of the liquid storage chamber 11 than the pole 44 .

[0054] The discharge part may include a discharge pipe, a discharge valve, a pump and a liquid storage tank. Specifically, the discharge valve may be a ball valve, a gate valve, a stop valve, a butterfly valve, etc., without limitation. Specifically, the discharge valve is installed on the discharge pipe, the discharge pipe is suitable for connecting the liquid storage chamber 11 and the inside of the liquid storage tank, and the pump and the discharge valve are suitable for controlling the discharge and removal speed of the liquid. The pump may be a centrifugal pump, a plunger pump, a diaphragm pump, etc., without limitation.

[0055] During the ultrasonic infiltration process, the liquid level detector 50 and the drainage component work together to ensure that the liquid does not exceed the injection hole 43 of the battery cell, thereby preventing the liquid from exceeding the injection hole 43 and flowing into the battery cell, causing internal short circuits in the battery cell, electrolyte leakage, performance degradation, or even damage to the battery 40.

[0056] For reference Figure 1 In one embodiment, the battery infiltration device 100 further includes a liquid adding component. When the liquid level detector 50 detects that the liquid level in the liquid storage chamber 11 is lower than the liquid injection hole 43 and the liquid level is less than or equal to a preset value, the liquid adding component provides liquid to the liquid storage chamber 11.

[0057] The liquid adding parts may include a liquid adding device, a liquid storage tank, a liquid inlet pipe, a liquid inlet valve, a pump, etc. Specifically, the liquid adding device is responsible for injecting the liquid into the liquid storage chamber 11, the liquid storage tank is used to store the liquid, the liquid inlet pipe is used to transport the liquid from the liquid storage tank to the liquid adding device, and the liquid inlet valve and the pump are used to control the flow and injection speed of the liquid. The liquid inlet valve may be a ball valve, a gate valve, a stop valve, a butterfly valve, etc., without limitation.

[0058] During the ultrasonic infiltration process, the liquid level detector 50 and the liquid adding part work together to ensure that the liquid does not exceed the injection hole 43 of the battery cell, thereby preventing the liquid from exceeding the injection hole 43 and flowing into the battery cell, causing internal short circuit of the battery cell, electrolyte leakage, performance degradation or even damage to the battery 40.

[0059] During the ultrasonic infiltration process, if the liquid level is too low and too thin, the ultrasonic wave may decay too quickly during the propagation process, which is not conducive to the electrolyte infiltration of the battery cell. Therefore, the liquid adding component and the liquid level detector 50 are provided to work together to improve the infiltration efficiency.

[0060] In one embodiment, the battery infiltration device 100 further includes a control component, which is electrically connected to the liquid level detector 50, the liquid adding component and the liquid discharging component, and is suitable for receiving liquid level information detected by the liquid level detector 50 and controlling whether the liquid adding component and the liquid discharging component are working.

[0061] The control component can be a contactor, a circuit breaker, a push button switch, a sensor, etc. without limitation.

[0062] Specifically, the liquid level detector 50 detects that the liquid level in the liquid storage chamber 11 is flush with the injection hole 43, and the control component controls the liquid discharge component to discharge the liquid; when the liquid level detector 50 detects that the liquid level in the liquid storage chamber 11 is lower than a preset value, the control component controls the liquid adding component to inject liquid into the liquid storage chamber 11.

[0063] A control component is provided to realize automatic adjustment of the liquid level in the liquid storage chamber 11 , so that the liquid level in the liquid storage chamber 11 can maximize the ultrasonic effect of the ultrasonic component 20 , which is beneficial to improving the production efficiency of the battery 40 .

[0064] For reference Figure 1In one embodiment, the battery infiltration device 100 further includes an elastic member 60 , one end of the elastic member 60 is elastically connected to the infiltration box 10 , and the other end of the elastic member 60 is elastically connected to the tray 30 .

[0065] The elastic member 60 may be metal or non-metal. Specifically, the metal elastic member 60 may be a wire spring, a leaf spring, etc., and the non-metal elastic member 60 may be a rubber spring, an air spring, etc., without limitation.

[0066] Optionally, the battery infiltration device 100 further includes a connecting member 61 , and the connecting member 61 may be in a plate shape, a strip shape, etc., without limitation.

[0067] The connecting member 61 is connected to the bottom wall of the liquid storage chamber 11 , and the material of the connecting member 61 can be stainless steel, aluminum alloy, high-strength plastic, etc., without limitation. The connecting member 61 is conducive to the installation of the elastic member 60 .

[0068] Optionally, the elastic member 60 is connected to the bottom wall of the liquid storage chamber 11 ; there are two elastic members 60 which are arranged opposite to each other and connected to the side walls of the liquid storage chamber 11 .

[0069] The elastic member 60 is provided so that there is a gap between the tray 30 and the liquid storage chamber 11 , so that the ultrasonic component 20 can better act on the tray 30 and the battery core, which is beneficial to improving the ultrasonic effect.

[0070] For reference Figure 1 In one embodiment, the ultrasonic component 20 includes a generator 21 and a transducer 22, wherein the generator 21 is adapted to generate a high-frequency oscillation signal, and the transducer 22 is adapted to convert the high-frequency oscillation signal into a high-frequency mechanical vibration and transmit it to the liquid.

[0071] Optionally, the generator 21 is connected to the outer wall of the infiltration box 10, and the connection between the generator 21 and the infiltration box 10 can be welding, screwing, clamping, bonding, etc., without limitation. The generator 21 can be a self-excited oscillator, an externally excited oscillator, etc., without limitation. The generator 21 is suitable for converting conventional alternating current (such as 220V or 380V) into a high-frequency oscillation signal.

[0072] The transducer 22 is connected to the inner wall of the infiltration box 10. The connection between the transducer 22 and the infiltration box 10 can be welding, screwing, clamping, bonding, etc., without limitation. The transducer 22 can be made of piezoelectric ceramics or other magnetostrictive materials. When the high-frequency oscillation signal generated by the generator 21 acts on the transducer 22, the piezoelectric ceramics will generate mechanical vibrations, and the vibrations will propagate in the medium such as the liquid to form ultrasonic waves.

[0073] Compared with high-temperature infiltration and pressurized infiltration, the ultrasonic component 20 is provided to achieve electrolyte infiltration of the battery cell, which is beneficial to increase the rate of electrolyte infiltration of the battery cell and improve the production cycle.

[0074] For reference Figure 1 In one embodiment, the battery infiltration device 100 further includes a dryer 70 , which is connected to the infiltration tank 10 and spaced apart from the liquid. The dryer 70 is suitable for drying the outer surface of the battery 40 .

[0075] The dryer 70 may be a convection dryer 70 (such as a fluidized dryer 70, an airflow dryer 70, a box dryer 70, etc.), a conduction dryer 70 (such as a screw conveyor dryer 70, a drum dryer 70, etc.), a radiation dryer 70 (such as an infrared dryer 70, etc.), a dielectric dryer 70, etc., without limitation.

[0076] The number of the dryer 70 may be one or more, and the plurality of dryers 70 may be arranged at intervals relative to each other.

[0077] The dryer 70 is located above the liquid. After the battery 40 completes the operation of the electrolyte infiltrating the battery core, the tray 30 is lifted up to leave the liquid, and the dryer 70 dries the liquid on the surface of the battery 40 .

[0078] In one embodiment, the battery infiltration device 100 also includes a pressure piece, which acts together with the ultrasonic component 20 on the battery 40, which is beneficial to improving the working efficiency of the electrolyte infiltration of the battery cell, allowing the electrolyte to more fully penetrate into the middle of the positive and negative electrode materials of the battery 40, optimizing the contact between the positive and negative electrodes of the battery 40, improving the electron transmission efficiency and ion transmission rate, and improving the performance of the battery 40.

[0079] Optionally, the battery infiltration device 100 of the utility model also includes a preliminary experimental step during use: the first step is to adjust the ultrasonic component 20 of the ultrasonic component 20 to test the upper limit frequency of the diaphragm wrinkles appearing in the battery cell; the second step is to adjust the ultrasonic time of the ultrasonic component 20 to test the lower limit of the time for the electrolyte to completely infiltrate the battery cell; the third step is to adjust the limiting restraint force of the tray 30 to test the lower limit of the limiting restraint force for the appearance of diaphragm wrinkles in the battery cell and the upper limit of the limiting restraint force for the electrolyte to be unable to infiltrate the battery cell.

[0080] Optionally, the battery infiltration device 100 of the utility model can also be used for control experiments with a high-temperature infiltration device and an ultrasonic infiltration device without infinite position restraint effect after the same infiltration time. After the battery 40 completes the infiltration process, it is necessary to perform a formation process and a capacity separation process. Specifically, Example 1 is a battery 40 using the battery infiltration device 100 of the utility model, Comparative Example 1 is a battery 40 using a high-temperature infiltration device, and Comparative Example 2 is a battery 40 using an ultrasonic infiltration device without infinite position restraint effect.

[0081] The battery 40 that has completed the wetting process is disassembled. It is found that there is no dry area in the battery 40 of Example 1, while there is a dry area in the battery 40 of Comparative Example 1 and Comparative Example 2.

[0082] For the battery 40 that has completed the formation process, the battery cells are disassembled. The interface of the battery cell of the battery 40 of Example 1 has no significant structural change, and a stable SEI film is formed. The SEI film formed on the interface of the battery cell of the battery 40 of Comparative Example 1 and Comparative Example 2 is unstable.

[0083] For the battery 40 that has completed the capacity separation process, the battery cells are disassembled. The interface of the battery cell of the battery 40 of Example 1 has no significant structural change, and a stable SEI film is formed. The SEI film formed on the interface of the battery cell of the battery 40 of Comparative Example 1 and Comparative Example 2 is unstable.

[0084] The battery infiltration device 100 of the utility model limits the battery 40 by the tray 30 during ultrasonic infiltration. Therefore, during the process of electrolyte infiltration of the battery cell, the tray 30 indirectly limits the relative movement of the diaphragm and the positive and negative electrode sheets in the battery cell during the ultrasonic process, thereby avoiding the occurrence of problems such as diaphragm wrinkles and electrode sheet alignment bias in the battery cell during the ultrasonic infiltration process.

[0085] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0086] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A battery infiltration device, characterized in that: Suitable for making the battery electrolyte infiltrate the battery core; the battery infiltration device comprises: An infiltration box having a liquid storage cavity suitable for containing liquid; An ultrasonic component connected to the infiltration tank; The tray is partially immersed in the liquid and is suitable for limiting the position of the battery cell.

2. The battery infiltration device according to claim 1, characterized in that: The battery comprises a shell, the battery core is suitable for being accommodated in the shell, the battery core is a laminated battery core, and the tray is suitable for clamping the shell so that the shell clamps the battery core.

3. The battery infiltration device according to claim 2, characterized in that: The tray has a plurality of clamping positions, each of which is suitable for clamping one of the batteries.

4. The battery impregnation device according to claim 1, characterized in that: The battery infiltration device further comprises a liquid level detector, which is connected to the infiltration tank and is suitable for detecting the liquid level of the liquid in the liquid storage cavity.

5. The battery impregnation device according to claim 4, characterized in that: The battery further comprises an end cover, the end cover is connected to the outer shell of the battery, and the end cover is provided with a liquid injection hole; The battery wetting device further comprises a liquid discharge member, and when the liquid level detector detects that the liquid level in the liquid storage chamber is flush with the liquid injection hole, the liquid discharge member discharges the liquid in the liquid storage chamber.

6. The battery impregnation device according to claim 5, characterized in that: The battery wetting device further comprises a liquid adding member. When the liquid level detector detects that the liquid level in the liquid storage chamber is lower than the liquid injection hole and the liquid level is less than or equal to a preset value, the liquid adding member provides liquid to the liquid storage chamber.

7. The battery impregnation device according to claim 6, characterized in that: It also includes a control component, which is electrically connected to the liquid level detector, the liquid adding component and the liquid discharging component, and is suitable for receiving the liquid level information detected by the liquid level detector and controlling whether the liquid adding component and the liquid discharging component are working.

8. The battery impregnation device according to claim 1, characterized in that: The battery impregnation device further comprises an elastic member, one end of which is elastically connected to the impregnation box, and the other end of which is elastically connected to the tray.

9. The battery impregnation device according to claim 1, characterized in that: The ultrasonic assembly includes a generator and a transducer. The generator is adapted to generate a high-frequency oscillation signal, and the transducer is adapted to convert the high-frequency oscillation signal into a high-frequency mechanical vibration and transmit the vibration to the liquid.

10. The battery impregnation device according to claim 1, characterized in that: The battery infiltration device further comprises a dryer, which is connected to the infiltration tank and spaced apart from the liquid. The dryer is suitable for drying the outer surface of the battery.

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