Drying device for lithium battery pack

Abstract

The invention relates to the technical field of lithium battery pack drying, and discloses a drying device for a lithium battery pack, the drying device comprises a bottom plate, an electric push rod and a top plate, an electric motor drives a supporting plate and a bearing plate to extend out of the drying device along a sliding groove so as to place an unpackaged lithium battery pack; then, the clamping plate fixes the battery pack to prevent displacement, and the lifting plate seals the inlet-outlet groove to enable the drying device to form a sealed environment. The heating box is used for heating a battery cell in the lithium battery pack, and the humidity sensor is used for monitoring the moisture content of the lithium battery pack; the vacuum pump vacuumizes the interior of the drying device, and the boiling point of water is reduced through the vacuum environment to accelerate water evaporation. The evaporator can recycle damp and hot gas exhausted by the vacuum pump and heat emitted by the drying cavity, and converts the damp and hot gas into high-temperature heat energy for drying the lithium battery pack again; the thermal infrared imager monitors the battery cells in the lithium battery pack, and when it is monitored that the temperature of the battery cells abnormally rises, the clamping plate moves the abnormal battery cells out of the lithium battery pack and puts the abnormal battery cells into the explosion-proof box.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery pack drying, in particular to a drying device for lithium battery pack. BACKGROUND

[0002] In recent years, in the process of green energy popularization, lithium ion batteries have achieved rapid development due to their high energy density, high voltage and environmental friendliness. With the continuous expansion of its application range, higher requirements for the cycle life and safety of lithium ion batteries are put forward in various fields. Among the many factors that affect the cycle life and safety of lithium ion batteries, moisture is a crucial one. If there is moisture in the battery system, it will cause problems such as electrolyte decomposition, lithium dendrite and water reaction to release flammable gas, directly leading to the deterioration of battery material structure and the decline of cycle performance; in severe cases, it may also cause major safety accidents such as explosion.

[0003] The existing lithium ion battery pack moisture drying equipment is usually a sealed box, and the lithium battery pack is placed in the box during use, and then the box is heated and vacuumized. However, after vacuumizing in this way, there is a lack of heat conduction medium in the box due to the vacuum state, which causes the lithium battery pack to be unable to be effectively heated, and the internal temperature rises very slowly, which seriously reduces the moisture drying efficiency. In addition, during the drying and heating process of the lithium battery pack, the temperature may rise and cause thermal runaway explosion, causing the same batch of batteries in the drying device to be damaged, significantly increasing the risk of drying operation. SUMMARY

[0004] In view of the shortcomings of the prior art, the present application provides a drying device for lithium battery pack, which solves the problems of low drying efficiency and high drying risk of the existing lithium battery pack.

[0005] To achieve the above purpose, the present application realizes the following technical scheme: a drying device for lithium battery pack, comprising a bottom plate, an electric push rod and a top plate: A protection assembly comprising a disc fixedly connected to the output end of the electric push rod, a plurality of rotating grooves are uniformly formed on the disc, a rotating plate is rotatably connected in the rotating groove, a telescopic rod is fixedly connected to the end of the disc away from the electric push rod, a push plate is fixedly connected to the end of the telescopic rod away from the disc, a plurality of inclined plates are uniformly fixedly connected to the arc-shaped end of the push plate, a bent plate and a hinged plate are rotatably connected to the outer wall of the inclined plate, a clamping plate is rotatably connected to the end of the bent plate away from the disc, an explosion-proof box is fixedly connected to the end of the bottom plate close to the top plate, an installation groove is formed on the explosion-proof box, and an explosion-proof plate is slidably connected in the installation groove; A drying assembly comprising two heating boxes symmetrically installed at the end of the bottom plate close to the top plate, an electric motor is fixedly connected to the end of the bottom plate close to the top plate, a fan is fixedly connected to the output end of the electric motor, and a plurality of evaporators are fixedly connected to one end of the top plate.

[0006] Preferably, the top plate is fixedly connected with a slide rail two near one end of the bottom plate, a threaded rod one is rotatably connected in the slide rail two, a moving seat is slidably connected in the slide rail two, and the threaded rod one is threadedly connected with the moving seat, the moving seat is fixedly connected with a slide rail one near one end of the bottom plate, a threaded rod two is rotatably connected in the slide rail one, a connecting seat is slidably connected in the slide rail one, and the connecting seat is fixedly connected with the electric push rod.

[0007] Preferably, the bottom plate is fixedly connected with a side plate and a partition plate near one end of the top plate, sliding grooves are formed in the side plate and the partition plate, sliding frames are slidably connected in the sliding grooves, a support plate is fixedly connected between the two sliding frames, and a driving gear plate is fixedly connected to one end of the support plate close to the bottom plate.

[0008] Preferably, two guide rails are symmetrically installed at one end of the support plate away from the bottom plate, two sliding seats are slidably connected to the outer wall of the guide rails, a connecting plate is fixedly connected between the two sliding seats, a spur gear is rotatably connected to the upper surface of the support plate, a pulling gear plate is fixedly connected to one end of the connecting plate close to the spur gear, and the teeth of the pulling gear plate are engaged with the teeth of the spur gear.

[0009] Preferably, standing plates are fixedly connected to one end of the sliding seat away from the bottom plate, clamping plates are fixedly connected to one end of every two standing plates close to the spur gear, a bearing plate is fixedly connected to one end of the support plate away from the bottom plate, a plurality of expansion slots are uniformly formed in the bearing plate, and the expansion slots are matched with the standing plates.

[0010] Preferably, a feeding plate and a discharging plate are fixedly connected to one end of the bottom plate close to the top plate, feeding and discharging grooves are formed in the feeding plate and the discharging plate, lifting grooves are formed in the feeding plate and the discharging plate, lifting plates are slidably connected in the lifting grooves, and the lifting plates are matched with the feeding and discharging grooves.

[0011] Preferably, a protective shell is fixedly connected to the upper surface of the bottom plate, and a cleaning hole is formed in one end of the protective shell away from the partition plate.

[0012] Preferably, a door plate is rotatably connected to one end of the protective shell away from the partition plate, and the door plate is matched with the cleaning hole.

[0013] Preferably, two exhaust holes are symmetrically formed in the top plate, air guide pipes are fixedly connected in the exhaust holes, a vacuum pump, a compressor, and a condenser are fixedly connected to one end of the top plate away from the bottom plate.

[0014] Preferably, a heat conducting pipe is fixedly connected to one end of the evaporator away from the bottom plate, the vacuum pump and the exhaust hole are communicated through the air guide pipe, and the compressor and the evaporator are communicated through the heat conducting pipe.

[0015] In summary, the technical effects and advantages of the present application are: 1、The present application solves the problem of low drying efficiency of lithium battery pack in the prior art by providing a drying assembly. When the electric motor rotates, the driving support plate and the bearing plate extend out of the drying device along the sliding groove to place the unsealed lithium battery pack. Then, the clamping plate fixes the battery pack to prevent displacement, and the lifting plate closes the access slot to form a sealed environment for the drying device. During the drying process, the heating box heats the cells in the lithium battery pack, and the humidity sensor monitors the moisture content in different areas of the lithium battery pack in real time. The vacuum pump evacuates the inside of the drying device to reduce the boiling point of water in the vacuum environment to accelerate the evaporation of moisture. The evaporator can recover the humid hot gas discharged by the vacuum pump and the heat dissipated from the drying cavity, and convert it into high-temperature heat energy for reuse in the drying of the lithium battery pack. The above-mentioned components work together to not only improve the drying efficiency of the lithium battery pack, but also greatly reduce the energy consumption.

[0016] 2、The present application solves the problem of high risk of lithium battery drying in the prior art by providing a protection assembly. The infrared thermal imager monitors the cells in the lithium battery pack in real time. When an abnormal temperature rise of the cells is detected, the clamping plate removes the abnormal cells from the lithium battery pack, and then the electric motor rotates to put the abnormal cells into the explosion-proof box. This process can avoid explosion caused by thermal runaway of abnormal cells, thereby significantly improving the safety of the lithium battery pack drying process. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The present application is a schematic diagram of the overall structure of a drying device for lithium battery pack; Figure 2 The present application is a schematic diagram of the structure of the heating box of a drying device for lithium battery pack; Figure 3 The present application is a schematic diagram of the cross-sectional structure of the feeding plate of a drying device for lithium battery pack; Figure 4 The present application is a schematic diagram of the cross-sectional structure of the partition plate of a drying device for lithium battery pack; Figure 5 The present application is a schematic diagram of the structure of the bearing plate of a drying device for lithium battery pack; Figure 6 The present application is a schematic diagram of the structure of the pulling tooth plate of a drying device for lithium battery pack; Figure 7 The present application is a schematic diagram of the structure of the top plate of a drying device for lithium battery pack; Figure 8 The present application is a schematic diagram of the structure of the electric push rod of a drying device for lithium battery pack; Figure 9 The present application is a schematic diagram of the cross-sectional structure of the explosion-proof box of a drying device for lithium battery pack; Figure 10It is a door plate structure diagram of the drying device for the lithium battery pack.

[0018] In the figure: 1, bottom plate; 2, protective shell; 3, feeding plate; 4, discharging plate; 5, heat conducting pipe; 6, condenser; 7, vacuum pump; 8, compressor; 9, partition; 10, side plate; 11, heating box; 12, sliding rail one; 13, motor; 14, explosion-proof box; 15, lifting plate; 16, lifting groove; 17, inlet and outlet groove; 18, fan; 19, sliding groove; 20, sliding bracket; 21, support plate; 22, driving toothed plate; 23, bearing plate; 24, telescopic groove; 25, clamping plate; 26, connecting plate; 27, sliding seat; 28, guide rail; 29, vertical plate; 30, pulling toothed plate; 31, straight gear; 32, top plate; 33, exhaust hole; 34, evaporator; 35, sliding rail two; 36, threaded rod one; 37, moving seat; 38, threaded rod two; 39, mounting groove; 40, connecting seat; 41, electric push rod; 42, disc; 43, rotating plate; 44, bent plate; 45, clamping plate; 46, hinged plate; 47, push plate; 48, telescopic rod; 49, cleaning hole; 50, explosion-proof plate; 51, door plate; 52, rotating groove; 53, inclined plate; 54, air guide pipe. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0020] Reference Figures 1-10 , reference Figures 1-10The utility model provides a kind of drying device for lithium battery package, including bottom plate 1, electric push rod 41 and top plate 32, drying assembly, including two heating boxes 11 that bottom plate 1 is symmetrically installed near one end of top plate 32, motor 13 is fixedly connected with near one end of bottom plate 1 of top plate 32, the output end of motor 13 is fixedly connected with fan 18, one end of top plate 32 is fixedly connected with multiple evaporators 34, near one end of bottom plate 1 of top plate 32 Fixedly connected with side plate 10 and partition 9, sliding groove 19 is all set in side plate 10 and partition 9, sliding bracket 20 is slidably connected in sliding groove 19, support plate 21 is fixedly connected between two sliding brackets 20, drive gear plate 22 is fixedly connected with near one end of support plate 21 of bottom plate 1, two guide rails 28 are symmetrically installed on the end away from bottom plate 1 of support plate 21, two sliding seats 27 are slidably connected on the outer wall of guide rail 28, connecting plate 26 is fixedly connected between two sliding seats 27, spur gear 31 is rotatably connected on the upper surface of support plate 21, pull gear plate 30 is fixedly connected with near one end of connecting plate 26 of spur gear 31, and the teeth of pull gear plate 30 are engaged with the teeth of spur gear 31, vertical plate 29 is fixedly connected with the end away from bottom plate 1 of sliding seat 27, clamping plate 25 is fixedly connected with near one end of every two vertical plates 29 of spur gear 31, load-bearing plate 23 is fixedly connected with the end away from bottom plate 1 of support plate 21, multiple telescopic grooves 24 are evenly set on load-bearing plate 23, and telescopic groove 24 is adapted to vertical plate 29, feed plate 3 and discharge plate 4 are fixedly connected with near one end of bottom plate 1 of top plate 32, and the inlet and outlet groove 17 is set in feed plate 3 and discharge plate 4, and lifting groove 16 is set in feed plate 3 and discharge plate 4, lifting plate 15 is slidably connected in lifting groove 16, and lifting plate 15 is adapted to inlet and outlet groove 17, two exhaust holes 33 are symmetrically set on top plate 32, and air guide pipe 54 is fixedly connected in exhaust hole 33, vacuum pump 7, compressor 8 and condenser 6 are fixedly connected with the end away from bottom plate 1 of top plate 32, heat pipe 5 is fixedly connected with the end away from bottom plate 1 of evaporator 34, vacuum pump 7 is communicated with exhaust hole 33 through air guide pipe 54, compressor 8 is communicated with evaporator 34 through heat pipe 5.

[0021] In order to improve the drying efficiency of the lithium battery pack, the drying assembly is arranged, when the motor 13 rotates, the support plate 21 and the bearing plate 23 are driven to move along the sliding groove 19, the unsealed lithium battery pack is transported to the bearing plate 23; then the clamping plate 25 fixes the lithium battery pack, prevents it from sliding off in the moving process, and the lifting plate 15 closes the access slot 17, so that the drying device forms a sealed environment. In the drying process, the heating box 11 heats the battery cell in the lithium battery pack, the humidity sensor installed in the drying device monitors the moisture content of different areas of the lithium battery pack in real time; the vacuum pump 7 evacuates the inside of the drying device, uses the vacuum environment to reduce the boiling point of water to accelerate the evaporation of water; the heat pump can recover the wet hot gas discharged by the vacuum pump 7 and the heat dissipation of the drying cavity, and convert it into high-temperature heat energy to be used for heating the drying medium again. The synergistic effect of the above components not only significantly improves the drying efficiency of the lithium battery pack, but also greatly reduces the energy consumption.

[0022] Specifically, the side plate 10, the feeding plate 3, the discharging plate 4, the top plate 32 and the protective shell 2 jointly constitute a sealed lithium battery pack drying device. The device can cooperate with the conveying belt in the lithium battery pack production line to realize automatic feeding of the lithium battery pack. First, when the lithium battery pack needs to be dried, the lifting rod installed in the lifting groove 16 pulls the lifting plate 15 to move downward, so that the feeding and discharging groove 17 of the feeding plate 3 is opened. The output end of the electric motor is fixedly connected with a driving gear. The rotation of the electric motor can drive the driving gear plate 22 to move, and in turn drive the support plate 21 to move synchronously. At the same time, the sliding frame 20 fixedly connected at both ends of the support plate 21 will slide along the sliding groove 19. Since the support plate 21 is fixedly connected with the bearing plate 23 above, the bearing plate 23 and the support plate 21 will synchronously extend out of the drying device through the feeding and discharging groove 17, and a plurality of ventilation holes are formed in the support plate 21 and the bearing plate 23. The bearing plate 23 is at the same height as the conveying belt in the lithium battery pack production line. The unsealed lithium battery pack is automatically transmitted to the bearing plate 23 through the conveying belt. The battery cell is evenly inserted into the mounting hole of the battery cell fixing tray in the unsealed lithium battery pack, and the battery cell can be pulled out along the mounting hole. The bottom of the mounting hole and the arc-shaped end are ventilated, which can effectively accelerate the drying speed of the battery cell. The support plate 21 is fixedly connected with a rotary air cylinder, and the output end of the rotary air cylinder is fixedly installed with a straight gear 31. The straight gear 31 is rotated to drive the pulling gear plate 30, the pulling gear plate 30 is moved to pull the clamping plate 25, the vertical plate 29 fixedly connected on one side of the clamping plate 25 is moved along the expansion slot 24 formed in the bearing plate 23, and the connecting plate 26 fixedly connected between the two vertical plates 29 is provided with a slot, so that the pulling gear plate 30 can move through the slot of the connecting plate 26. The clamping plate 25 fixes the battery cell fixing tray, so as to avoid the lithium battery pack from sliding off the support plate 21 during movement. At the same time, the clamping plate 25 is adjustably arranged, and can fix the battery cell fixing tray of different sizes.

[0023] Secondly, the explosion-proof plate 50 on the explosion-proof box 14 slides along the mounting groove 39 to open the explosion-proof box 14, at this time the heating box 11 in the drying device is heated and driven to rotate by the motor 13, and the fan 18 is rotated to blow the hot air generated by the heating box 11 to the lithium battery pack above which needs to be dried, and the temperature sensor installed in the device automatically controls the temperature of the heating box 11 to avoid irreversible performance degradation and safety decline of the battery due to high temperature, and the vacuum pump 7 above blows the drying device through the air duct 54, the vacuum environment can reduce the boiling point of water, accelerate the evaporation of water in the lithium battery pack, and the water in the lithium battery pack evaporates at low temperature, the evaporated water vapor is absorbed by the evaporator 34 fixedly connected to the top plate 32, the evaporator 34 inputs the water vapor into the compressor 8 through the heat pipe 5, the compressor 8 consumes electricity to compress it, so that the pressure and temperature of the refrigerant are greatly increased, the high-temperature and high-pressure gaseous refrigerant enters the condenser 6 through the heat pipe 5, exchanges heat with the object to be heated, releases a large amount of heat, and inputs the heat into the drying device again through the heat pipe 5, through the above heat recycling, compared with the traditional hot air drying, the energy consumption will be greatly reduced, and by adjusting the power of the compressor 8, the drying temperature can be stabilized at 40-60℃ to avoid high-temperature damage to the battery, and the heat output is stable, which improves the drying uniformity, the humidity sensor installed in the drying device monitors the water content of the lithium battery pack in real time, and the above vacuum pump 7, humidity sensor and temperature sensor are existing components, which will not be described here, and the temperature in the drying device is automatically adjusted according to the water content.

[0024] Reference Figures 1-10The protection assembly comprises a disc 42 fixedly connected to the output end of the electric push rod 41, a plurality of rotating grooves 52 are uniformly formed in the disc 42, a rotating plate 43 is rotatably connected in the rotating groove 52, an extension rod 48 is fixedly connected to the end of the disc 42 away from the electric push rod 41, a push plate 47 is fixedly connected to the end of the extension rod 48 away from the disc 42, a plurality of inclined plates 53 are uniformly fixedly connected to the arc-shaped end of the push plate 47, a bent plate 44 and a hinged plate 46 are rotatably connected to the outer wall of the inclined plate 53, a clamping plate 45 is rotatably connected to the end of the bent plate 44 away from the disc 42, an explosion-proof box 14 is fixedly connected to the end of the bottom plate 1 close to the top plate 32, an installation groove 39 is formed in the explosion-proof box 14, and an explosion-proof plate 50 is slidably connected in the installation groove 39; the top plate 32 is fixedly connected to the end close to the bottom plate 1, a sliding rail two 35 is fixedly connected to the end of the top plate 32 close to the bottom plate 1, a threaded rod one 36 is rotatably connected in the sliding rail two 35, a moving seat 37 is slidably connected in the sliding rail two 35, the threaded rod one 36 is threadedly connected with the moving seat 37, the moving seat 37 is fixedly connected to the end close to the bottom plate 1, a sliding rail one 12 is fixedly connected to the end of the moving seat 37 close to the bottom plate 1, a threaded rod two 38 is rotatably connected in the sliding rail one 12, a connecting seat 40 is slidably connected in the sliding rail one 12, and the connecting seat 40 is fixedly connected with the electric push rod 41, the protection shell 2 is fixedly connected to the upper surface of the bottom plate 1, the cleaning hole 49 is formed in the end of the protection shell 2 away from the partition plate 9, the door plate 51 is rotatably connected to the end of the protection shell 2 away from the partition plate 9, and the door plate 51 is matched with the cleaning hole 49.

[0025] In order to improve the safety of the lithium battery pack drying, the protection assembly is arranged, the infrared thermal imager is used for monitoring the battery cell in the lithium battery pack in real time, when the temperature of the battery cell is abnormally high, the clamping plate 45 removes the abnormal battery cell from the lithium battery pack, and then the electric motor is rotated to put the abnormal battery cell into the explosion-proof box 14.

[0026] Specific, through the observation window of the top plate 32 of the drying device, and the observation window is made of germanium glass, the infrared thermal imager is installed outside the observation window, which avoids the performance decline and shortens the service life of the equipment caused by the vacuum high temperature environment in the drying device, and the infrared thermal imager is vertically arranged with the cell of lithium battery pack. The above observation window and infrared thermal imager are existing components and are not shown in the figure. When the temperature of the cell is abnormally high, the infrared temperature sensor transmits the monitoring data to the processor. After the processor processes the data, the electric motor in the slide rail two 35 is driven to rotate by the controller, so that the threaded rod one 36 rotates, and the moving seat 37 moves along the inner wall of the slide rail two 35. Because the moving seat 37 is fixedly connected with the slide rail one 12, when the slide rail two 35 moves, the slide rail one 12 moves synchronously. The electric motor in the slide rail one 12 rotates, so that the threaded rod two 38 rotates, and the connecting seat 40 moves along the inner wall of the slide rail one 12. The connecting seat 40 moves to make the electric push rod 41 move synchronously. The disc 42 is fixedly connected with the telescopic rod 48 at one end away from the electric push rod 41. The telescopic rod 48 is elongated to drive the push plate 47 to move, so that the bent plate 44, the rotating plate 43 and the hinged plate 46 rotate, and the clamping plate 45 is folded. The above disc 42, telescopic rod 48, push plate 47, bent plate 44, rotating plate 43 and hinged plate 46 together constitute a battery clamping mechanism, and the distance between the clamping mechanism and the cell of lithium battery pack is adjusted by the elongation and shortening of the above electric push rod 41. The position of the clamping mechanism is adjusted by the rotation of the threaded rod one 36 and the threaded rod two 38, so that the clamping mechanism can move to any position below the drying cell. The temperature abnormal battery is positioned by the infrared thermal imager, and the cell is pulled out from the mounting hole of the cell fixing tray by the clamping mechanism and moved to the upper side of the explosion-proof box 14. At this time, the elongated electric push rod 41 puts the abnormal cell into the explosion-proof box 14, avoiding the impact of the explosion-proof box 14 on the cell to cause thermal runaway or explosion. After the abnormal cell is put in, the explosion-proof plate 50 is slid along the mounting groove 39 to close the explosion-proof box 14, avoiding the damage of the simultaneously dried cells in the drying device caused by the thermal runaway of the temperature abnormal battery. Not only can improve the safety of the drying device, but also can avoid causing greater economic loss. When the lithium battery pack is dried, the abnormal cell in the explosion-proof box 14 can be taken out by opening the door plate 51.

[0027] The working principle of the present application is as follows: when the lithium battery pack needs to be dried, the lifting plate 15 is pulled down by the lifting rod installed in the lifting groove 16, the inlet and outlet groove 17 of the feeding plate 3 is opened, the electric motor drives the bearing plate 23 and the support plate 21 to extend out of the drying device through the inlet and outlet groove 17, and the unsealed lithium battery pack is automatically transmitted to the bearing plate 23 through the conveying belt; the support plate 21 is fixedly connected with a rotary air cylinder, the rotary air cylinder drives the straight gear 31 to rotate and pull the clamping plate 25, the clamping plate 25 fixes the cell fixing tray, avoiding the lithium battery pack from sliding off the support plate 21 during movement. The reverse rotation of the electric motor makes the support plate 21 and the bearing plate 23 move reversely into the drying device, at the same time, the lifting rod pushes the lifting plate 15 to move upward, so that the inlet and outlet groove 17 of the feeding plate 3 is closed, the explosion-proof plate 50 on the explosion-proof box 14 slides along the installation groove 39 to open the explosion-proof box 14, at this time, the heating box 11 in the drying device is heated, and the fan 18 is driven to rotate by the electric motor 13, the hot air generated by the heating box 11 is blown to the lithium battery pack above which needs to be dried, at the same time, the temperature sensor installed in the device automatically controls the temperature of the heating box 11, at the same time, the vacuum pump 7 above draws vacuum in the drying device through the air guide pipe 54, the vacuum environment can reduce the boiling point of water, accelerate the evaporation of water in the lithium battery pack, the water in the lithium battery pack evaporates at low temperature, the water vapor is absorbed by the evaporator 34 of the top plate 32, the water vapor is input into the compressor 8 through the heat pipe 5, the compressor 8 consumes electric energy to compress it, the high-temperature and high-pressure gaseous refrigerant enters the condenser 6 through the heat pipe 5, exchanges heat with the object to be heated, releases a large amount of heat, and inputs the heat into the drying device again through the heat pipe 5, through the above heat recycling, compared with the traditional hot air drying, the energy consumption can be greatly reduced, at the same time, by adjusting the power of the compressor 8, the drying temperature can be stabilized at 40-60℃ to avoid high temperature damage to the battery, and the heat output is stable, which improves the drying uniformity, when the cell temperature is abnormally high, the electric motor in the slide rail two 35 is driven by the controller to rotate, the threaded rod one 36 is rotated, the moving seat 37 moves along the inner wall of the slide rail two 35, since the moving seat 37 is fixedly connected with the slide rail one 12, when the slide rail two 35 moves, the slide rail one 12 moves synchronously, the electric motor in the slide rail one 12 rotates, the threaded rod two 38 rotates, the connecting seat 40 moves along the inner wall of the slide rail one 12, the movement of the connecting seat 40 makes the electric push rod 41 move synchronously, the extension and shortening of the electric push rod 41 adjusts the distance between the clamping mechanism and the lithium battery pack cell, and through the rotation of the threaded rod one 36 and the threaded rod two 38, the position of the clamping mechanism is adjusted, so that the clamping mechanism can move to the position of any drying cell below, the infrared thermal imager is used to locate the temperature abnormal battery, and the cell is pulled out of the mounting hole of the cell fixing tray through the clamping mechanism, and the abnormal cell is put into the explosion-proof box 14.

[0028] Secondly, the explosion-proof plate 50 on the explosion-proof box 14 slides along the mounting groove 39 to open the explosion-proof box 14, at this time the heating box 11 in the drying device is heated and driven to rotate by the motor 13, and the fan 18 is rotated to blow the hot air generated by the heating box 11 to the lithium battery pack above which needs to be dried, and the temperature sensor installed in the device automatically controls the temperature of the heating box 11 to avoid irreversible performance degradation and safety decline of the battery due to high temperature, and the vacuum pump 7 above blows the drying device through the air duct 54, the vacuum environment can reduce the boiling point of water, accelerate the evaporation of water in the lithium battery pack, and the water in the lithium battery pack evaporates at low temperature, the evaporated water vapor is absorbed by the evaporator 34 fixedly connected to the top plate 32, the evaporator 34 inputs the water vapor into the compressor 8 through the heat pipe 5, the compressor 8 consumes electricity to compress it, so that the pressure and temperature of the refrigerant are greatly increased, the high-temperature and high-pressure gaseous refrigerant enters the condenser 6 through the heat pipe 5, exchanges heat with the object to be heated, releases a large amount of heat, and inputs the heat into the drying device again through the heat pipe 5, through the above heat recycling, compared with the traditional hot air drying, the energy consumption will be greatly reduced, and by adjusting the power of the compressor 8, the drying temperature can be stabilized at 40-60℃ to avoid high-temperature damage to the battery, and the heat output is stable, which improves the drying uniformity, the humidity sensor installed in the drying device monitors the water content of the lithium battery pack in real time, and the above vacuum pump 7, humidity sensor and temperature sensor are existing components, which will not be described here, and the temperature in the drying device is automatically adjusted according to the water content.

[0029] Reference Figures 1-10, the protection assembly includes the disc 42 fixedly connected at the output end of the electric push rod 41, a plurality of rotating grooves 52 are uniformly arranged on the disc 42, the rotating plate 43 is rotatably connected in the rotating groove 52, the telescopic rod 48 is fixedly connected at the end of the disc 42 away from the electric push rod 41, the push plate 47 is fixedly connected at the end of the telescopic rod 48 away from the disc 42, a plurality of inclined plates 53 are uniformly fixedly connected at the arc-shaped end of the push plate 47, the outer wall of the inclined plate 53 is rotatably connected with the bent plate 44 and the hinged plate 46, the clamping plate 45 is rotatably connected at the end of the bent plate 44 away from the disc 42, the explosion-proof box 14 is fixedly connected at the end of the bottom plate 1 close to the top plate 32, the mounting groove 39 is arranged on the explosion-proof box 14, and the explosion-proof plate 50 is slidably connected in the mounting groove 39; the slide rail two 35 is fixedly connected at the end of the top plate 32 close to the bottom plate 1, the threaded rod one 36 is rotatably connected in the slide rail two 35, the moving seat 37 is slidably connected in the slide rail two 35, and the threaded rod one 36 is threadedly connected with the moving seat 37, the slide rail one 12 is fixedly connected at the end of the moving seat 37 close to the bottom plate 1, the threaded rod two 38 is rotatably connected in the slide rail one 12, the connecting seat 40 is slidably connected in the slide rail one 12, and the connecting seat 40 is fixedly connected with the electric push rod 41, the protection shell 2 is fixedly connected to the upper surface of the bottom plate 1, the cleaning hole 49 is arranged at the end of the protection shell 2 away from the partition plate 9, the door plate 51 is rotatably connected at the end of the protection shell 2 away from the partition plate 9, and the door plate 51 is matched with the cleaning hole 49.

[0030] In order to improve the safety of the lithium battery pack drying, the protection assembly is arranged, the infrared thermal imager is used for monitoring the battery cell in the lithium battery pack in real time, when the temperature of the battery cell is abnormally high, the clamping plate 45 removes the abnormal battery cell from the lithium battery pack, and then the electric motor is rotated to put the abnormal battery cell into the explosion-proof box 14.

[0031] Specific, through the observation window of the top plate 32 of the drying device, and the observation window is made of germanium glass, the infrared thermal imager is installed outside the observation window, which avoids the performance decline and shortens the service life of the equipment caused by the vacuum high temperature environment in the drying device, and the infrared thermal imager is vertically arranged with the cell of lithium battery pack. The above observation window and infrared thermal imager are existing components and are not shown in the figure. When the temperature of the cell is abnormally high, the infrared temperature sensor transmits the monitoring data to the processor. After the processor processes the data, the electric motor in the slide rail two 35 is driven to rotate by the controller, so that the threaded rod one 36 rotates, and the moving seat 37 moves along the inner wall of the slide rail two 35. Since the moving seat 37 is fixedly connected with the slide rail one 12, when the slide rail two 35 moves, the slide rail one 12 moves synchronously. The electric motor in the slide rail one 12 rotates, so that the threaded rod two 38 rotates, and the connecting seat 40 moves along the inner wall of the slide rail one 12. The movement of the connecting seat 40 synchronously moves the electric push rod 41. The telescopic rod 48 fixedly connected with the one end of the disc 42 away from the electric push rod 41 is elongated to drive the push plate 47 to move, so that the bending plate 44, the rotating plate 43 and the hinged plate 46 rotate, and the clamping plate 45 is pushed to fold. The above disc 42, telescopic rod 48, push plate 47, bending plate 44, rotating plate 43 and hinged plate 46 together constitute a battery clamping mechanism, and the distance between the clamping mechanism and the cell of lithium battery pack is adjusted by the elongation and shortening of the above electric push rod 41. The position of the clamping mechanism is adjusted by the rotation of the threaded rod one 36 and the threaded rod two 38, so that the clamping mechanism can move to any position below the drying cell. The temperature abnormal battery is positioned by the infrared thermal imager, and the cell is pulled out from the mounting hole of the cell fixing tray by the clamping mechanism and moved to the upper side of the explosion-proof box 14. At this time, the elongated electric push rod 41 puts the abnormal cell into the explosion-proof box 14, avoiding the impact heat of the explosion-proof box 14 on the cell, which may cause the cell to lose control or explode. After the abnormal cell is put in, the explosion-proof plate 50 is slid along the mounting groove 39 to close the explosion-proof box 14, avoiding the damage of the cells simultaneously dried in the drying device caused by the thermal runaway of the temperature abnormal battery. Not only can improve the safety of the drying device, but also can avoid causing greater economic loss. When the lithium battery pack is dried, the abnormal cell in the explosion-proof box 14 can be taken out by opening the door plate 51.

[0032] The working principle of the present application is as follows: when the lithium battery pack needs to be dried, the lifting plate 15 is pulled down by the lifting rod installed in the lifting groove 16, the inlet and outlet groove 17 of the feeding plate 3 is opened, the electric motor drives the bearing plate 23 and the support plate 21 to extend out of the drying device through the inlet and outlet groove 17, and the unsealed lithium battery pack is automatically transmitted to the bearing plate 23 through the conveying belt; the support plate 21 is fixedly connected with a rotary air cylinder, the rotary air cylinder drives the straight gear 31 to rotate and pull the clamping plate 25, the clamping plate 25 fixes the cell fixing tray, avoiding the lithium battery pack from sliding off the support plate 21 during movement. The reverse rotation of the electric motor makes the support plate 21 and the bearing plate 23 move reversely into the drying device, at the same time, the lifting rod pushes the lifting plate 15 to move upward, so that the inlet and outlet groove 17 of the feeding plate 3 is closed, the explosion-proof plate 50 on the explosion-proof box 14 slides along the installation groove 39 to open the explosion-proof box 14, at this time, the heating box 11 in the drying device is heated, and the fan 18 is driven to rotate by the electric motor 13, the hot air generated by the heating box 11 is blown to the lithium battery pack above which needs to be dried, at the same time, the temperature sensor installed in the device automatically controls the temperature of the heating box 11, at the same time, the vacuum pump 7 above draws vacuum in the drying device through the air guide pipe 54, the vacuum environment can reduce the boiling point of water, accelerate the evaporation of water in the lithium battery pack, the water in the lithium battery pack evaporates at low temperature, the water vapor is absorbed by the evaporator 34 of the top plate 32, the water vapor is input into the compressor 8 through the heat pipe 5, the compressor 8 consumes electric energy to compress it, the high-temperature and high-pressure gaseous refrigerant enters the condenser 6 through the heat pipe 5, exchanges heat with the object to be heated, releases a large amount of heat, and inputs the heat into the drying device again through the heat pipe 5, through the above heat recycling, compared with the traditional hot air drying, the energy consumption can be greatly reduced, at the same time, by adjusting the power of the compressor 8, the drying temperature can be stabilized at 40-60℃ to avoid high temperature damage to the battery, and the heat output is stable, which improves the drying uniformity, when the temperature of the cell is abnormally high, the electric motor in the slide rail two 35 is driven by the controller to rotate, the threaded rod one 36 is rotated, the moving seat 37 moves along the inner wall of the slide rail two 35, since the moving seat 37 is fixedly connected with the slide rail one 12, when the slide rail two 35 moves, the slide rail one 12 moves synchronously, the electric motor in the slide rail one 12 rotates, the threaded rod two 38 rotates, the connecting seat 40 moves along the inner wall of the slide rail one 12, the movement of the connecting seat 40 makes the electric push rod 41 move synchronously, the extension and shortening of the electric push rod 41 adjusts the distance between the clamping mechanism and the lithium battery pack cell, and through the rotation of the threaded rod one 36 and the threaded rod two 38, the position of the clamping mechanism is adjusted, so that the clamping mechanism can move to the position of any drying cell below, the infrared thermal imager is used to locate the temperature abnormal battery, and the cell is pulled out of the mounting hole of the cell fixing tray through the clamping mechanism, and the abnormal cell is put into the explosion-proof box 14.

[0033] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalent features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A drying device for a lithium battery pack, comprising a base plate (1), an electric push rod (41), and a top plate (32), characterized in that: The protective assembly includes a disc (42) fixedly connected to the output end of an electric actuator (41). The disc (42) has a plurality of rotating grooves (52) evenly distributed on it. A rotating plate (43) is rotatably connected in the rotating grooves (52). A telescopic rod (48) is fixedly connected to one end of the disc (42) away from the electric actuator (41). A push plate (47) is fixedly connected to one end of the telescopic rod (48) away from the disc (42). A plurality of inclined plates (53) are evenly fixedly connected to the arc-shaped end of the push plate (47). A bent plate (44) and a hinge plate (46) are rotatably connected to the outer wall of the inclined plate (53). A clamping plate (45) is rotatably connected to one end of the bent plate (44) away from the disc (42). An explosion-proof box (14) is fixedly connected to one end of the bottom plate (1) near the top plate (32). An installation groove (39) is provided on the explosion-proof box (14). An explosion-proof plate (50) is slidably connected in the installation groove (39). The drying assembly includes two heating boxes (11) symmetrically installed on one end of the bottom plate (1) near the top plate (32). A motor (13) is fixedly connected to one end of the bottom plate (1) near the top plate (32). A fan (18) is fixedly connected to the output end of the motor (13). Multiple evaporators (34) are fixedly connected to one end of the top plate (32).

2. The drying device for a lithium battery pack according to claim 1, characterized in that: The top plate (32) is fixedly connected to a slide rail two (35) at one end near the bottom plate (1). A threaded rod one (36) is rotatably connected inside the slide rail two (35). A movable seat (37) is slidably connected inside the slide rail two (35), and the threaded rod one (36) is threadedly connected to the movable seat (37). The movable seat (37) is fixedly connected to a slide rail one (12) at one end near the bottom plate (1). A threaded rod two (38) is rotatably connected inside the slide rail one (12). A connecting seat (40) is slidably connected inside the slide rail one (12), and the connecting seat (40) is fixedly connected to the electric push rod (41).

3. The drying device for a lithium battery pack according to claim 1, characterized in that: The bottom plate (1) is fixedly connected to a side plate (10) and a partition plate (9) at one end near the top plate (32). The partition plate (9) and the side plate (10) are both provided with sliding grooves (19). A slide frame (20) is slidably connected in the sliding groove (19). A support plate (21) is fixedly connected between the two slide frames (20). A drive tooth plate (22) is fixedly connected to one end of the support plate (21) near the bottom plate (1).

4. A drying device for a lithium battery pack according to claim 3, characterized in that: Two guide rails (28) are symmetrically installed on the end of the support plate (21) away from the base plate (1). Two slide blocks (27) are slidably connected to the outer wall of the guide rails (28). A connecting plate (26) is fixedly connected between the two slide blocks (27). A spur gear (31) is rotatably connected to the upper surface of the support plate (21). A pull tooth plate (30) is fixedly connected to the end of the connecting plate (26) near the spur gear (31), and the teeth of the pull tooth plate (30) mesh with the teeth of the spur gear (31).

5. A drying device for a lithium battery pack according to claim 4, characterized in that: The slide (27) is fixedly connected to a vertical plate (29) at the end away from the base plate (1). Each pair of vertical plates (29) is fixedly connected to a clamping plate (25) at the end near the spur gear (31). The support plate (21) is fixedly connected to a bearing plate (23) at the end away from the base plate (1). Multiple telescopic grooves (24) are evenly provided on the bearing plate (23), and the telescopic grooves (24) are adapted to the vertical plates (29).

6. A drying device for a lithium battery pack according to claim 1, characterized in that: The bottom plate (1) is fixedly connected to the top plate (32) with a feeding plate (3) and a discharging plate (4). Both the feeding plate (3) and the discharging plate (4) have inlet and outlet slots (17). Both the feeding plate (3) and the discharging plate (4) have lifting slots (16). A lifting plate (15) is slidably connected in the lifting slot (16), and the lifting plate (15) is adapted to the inlet and outlet slots (17).

7. A drying device for a lithium battery pack according to claim 1, characterized in that: A protective shell (2) is fixedly connected to the upper surface of the base plate (1), and a cleaning hole (49) is provided at the end of the protective shell (2) away from the partition (9).

8. A drying device for a lithium battery pack according to claim 7, characterized in that: The protective shell (2) is rotatably connected to a door panel (51) at the end away from the partition (9), and the door panel (51) is adapted to the cleaning hole (49).

9. A drying device for a lithium battery pack according to claim 1, characterized in that: Two exhaust holes (33) are symmetrically opened on the top plate (32). A gas guide pipe (54) is fixedly connected inside the exhaust hole (33). A vacuum pump (7), a compressor (8) and a condenser (6) are fixedly connected to the end of the top plate (32) away from the bottom plate (1).

10. A drying device for a lithium battery pack according to claim 9, characterized in that: The evaporator (34) is fixedly connected to a heat pipe (5) at the end away from the base plate (1). The vacuum pump (7) is connected to the exhaust port (33) through a gas pipe (54). The compressor (8) is connected to the evaporator (34) through a heat pipe (5).

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