Power battery water bath charging and discharging device and method

Abstract

The application discloses a kind of power battery water bath charging and discharging device and method, to solve the insufficient of battery charging and discharging heat exchange energy consumption, temperature control precision is low.The present application includes fixed seat, tray, lifting platform, tray is installed on fixed seat, tray is equipped with water bath, water bath bottom is equipped with several battery clamping units, lifting platform is equipped with downwardly extending water temperature detector and water level detector, lifting platform and each battery are correspondingly installed with positive pole touch rod, negative pole touch rod, battery temperature detection touch rod;Tray is equipped with water flow channel, water bath bottom is provided with several and water flow channel communication water inlet, water flow channel is connected with water inlet pipe;Water bath upper portion is provided with several up and down interval arrangement water outlet, water outlet is connected with water outlet pipe, and water outlet valve is installed on water outlet pipe;Lifting platform is installed on fixed seat to realize up and down lifting movement.The present application can reduce the energy consumption of production process, improve the temperature control precision when battery charging and discharging.

Description

Technical Field

[0001] This invention relates to a battery charging and discharging device, and more specifically, to a power battery water bath charging and discharging device and method. Background Technology

[0002] After the power battery is filled and sealed, it needs to be activated through charging and discharging. Currently, most charging and discharging equipment, both domestically and internationally, first controls the overall temperature of the charging and discharging environment, then uses fans to blow cool air onto the battery, replacing the temperature of the surrounding air and thus controlling the battery temperature. Currently used methods include: Method 1, using fans to directly replace the air inside and outside the charging / discharging compartment for temperature control; Method 2, using air conditioning to blow cold air into the charging / discharging compartment for temperature control; Method 3, using a water flow heat exchanger + fan to control the air temperature, thereby controlling the temperature of the charging / discharging compartment. However, these methods have relatively high energy consumption and relatively low accuracy in controlling the battery temperature itself. Summary of the Invention

[0003] To overcome the above shortcomings, the present invention provides a power battery water bath charging and discharging device and method, which can reduce energy consumption in the production process and improve the temperature control accuracy during battery charging and discharging.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a power battery water bath charging and discharging device, comprising a fixed base, a tray, and a lifting platform. The tray is installed on the fixed base, and a water bath is provided on the tray. Several battery clamping units are arranged at the bottom of the water bath, and batteries are clamped on the battery clamping units. A downward-extending water temperature detector and a water level detector are provided on the lifting platform. A positive electrode contact rod, a negative electrode contact rod, and a battery temperature detection contact rod are correspondingly installed on the lifting platform and on each battery. A water flow channel is provided on the tray, and several water inlet holes communicating with the water flow channel are provided at the bottom of the water bath. The water flow channel is connected to a water inlet pipe. Several water outlet holes arranged vertically at intervals are provided at the top of the water bath. The water outlet holes are connected to a water outlet pipe, and a water outlet valve is installed on the water outlet pipe. The lifting platform is installed on the fixed base to realize vertical lifting and moving.

[0005] During battery charging and discharging, the battery is clamped onto the battery clamping unit, ensuring reliable positioning. Then, the entire tray, along with the battery, is installed onto the mounting base. The lifting platform moves downwards, and the positive, negative, and battery temperature detection contacts the positive, negative, and battery surfaces, respectively. Water is supplied to the water bath through the inlet pipe. A water level detector monitors the water level; when it reaches the set value, the outlet valve opens, allowing water to flow in and out simultaneously, maintaining a consistent flow rate. The positive and negative contacts charge and discharge the battery. The water temperature detector monitors the water bath temperature; if it exceeds the set range, the inlet and outlet flow rates are adjusted to regulate the temperature and maintain it within the set range. After charging and discharging, the water in the water bath is drained, and the lifting platform is raised. The tray, along with the battery, is removed from the mounting base. Water bath cooling significantly improves heat exchange efficiency. Compared to traditional ambient temperature control methods, this invention reduces the temperature control time required for each restart. Simultaneously, energy consumption is reduced by more than 30% compared to traditional methods, and the uniformity of water bath temperature control is also greatly improved. Traditional temperature control methods can only maintain battery temperature uniformity within ±4℃, while this invention can improve battery temperature uniformity to at least ±2℃. Several water outlets are spaced vertically to allow for control of battery immersion at different liquid levels.

[0006] Therefore, the power battery water bath charging and discharging device of the present invention can reduce energy consumption in the production process and improve the temperature control accuracy during battery charging and discharging.

[0007] Preferably, the mounting base is provided with a mounting groove, the tray is installed in the mounting groove, the bottom of the mounting groove is connected to a drain pipe, and a drain branch pipe is connected between the drain pipe and the inlet pipe.

[0008] When water overflows from the water bath, it flows directly into the installation groove and is discharged outwards through the drain pipe. When drainage of the water bath is required, the drain branch pipe is opened to facilitate the discharge of water from the water bath through the drain branch pipe.

[0009] As a preferred option, a support platform and a positioning sensor are installed at the bottom of the mounting slot. The support platform is equipped with a positioning pin, and the bottom of the tray and the positioning pin are equipped with corresponding positioning holes. The positioning pin is inserted into the positioning hole, and the positioning sensor is attached to the bottom surface of the tray.

[0010] The support platform facilitates pallet installation, and precise pallet positioning is achieved through the matching insertion of positioning pins and holes. Once the pallet is in place, the positioning sensor detects the information and indicates that installation is complete.

[0011] Preferably, an inlet telescopic pipe and an inlet insert are connected between the inlet pipe and the water flow channel. An inlet piston cylinder is installed on the fixed base. The telescopic rod of the inlet piston cylinder is connected to the inlet insert, and the inlet insert is inserted into the opening end of the water flow channel.

[0012] The extension rod of the inlet piston cylinder extends outward to precisely insert the inlet tube into the opening of the water flow channel, achieving automated connection, which is more convenient than manual connection.

[0013] As a preferred embodiment, both the water outlet pipe and the water outlet hole are connected by a water outlet telescopic pipe and a water outlet insertion pipe. A water outlet piston cylinder is installed on the fixed base. The telescopic rod of the water outlet piston cylinder is connected to the movable base. The water outlet insertion pipe is connected to the movable base. One end of the water outlet insertion pipe is adapted to be inserted into the water outlet hole.

[0014] The extension rod of the outlet piston cylinder extends outward to precisely insert the outlet tube into the outlet hole, achieving automated connection, which is more convenient than manual connection.

[0015] Preferably, the battery clamping unit includes a clamping sleeve and a support pad disposed within the clamping sleeve, wherein the battery adapter is inserted into the clamping sleeve and the lower end of the battery is supported on the support pad.

[0016] The lower outer wall of the battery is clamped in the mounting sleeve, ensuring reliable positioning. The lower edge of the battery is supported by a support pad, allowing other parts of the lower part of the battery to be suspended, which helps improve the heat exchange efficiency of the battery.

[0017] Preferably, a lifting piston cylinder and a lifting guide rod are installed on the fixed base. The telescopic rod of the lifting piston cylinder is connected to the lifting platform, and the lifting guide rod is movably connected to the lifting platform. A limit rod is connected to the fixed base, and a limit sensor is installed on the upper end of the limit rod.

[0018] The lifting piston cylinder drives the lifting platform to move up and down smoothly and reliably along the lifting guide rod. Limit rods and limit sensors can limit the downward movement of the lifting platform, making its downward movement more precise and reliable.

[0019] Preferably, a waterproof jacket is installed on the lower surface of the lifting platform corresponding to the battery, and the positive electrode contact rod, negative electrode contact rod, and battery temperature detection contact rod corresponding to a battery are placed inside the waterproof jacket; after the lifting platform moves down into place, the waterproof jacket is sealed and fitted onto the outer wall of the battery.

[0020] The waterproof jacket effectively prevents water from splashing onto the battery electrodes and causing a short circuit.

[0021] Preferably, a rotating base is installed at the bottom of the water bath, and a battery clamping unit is installed on the rotating base. A turntable is provided on the lifting platform corresponding to the rotating base. A motor for driving the turntable is installed on the lifting platform. Several positioning rods are connected to the rotating base, and positioning holes are provided on the turntable corresponding to the positioning rods. An unlocking rod is provided on the tray, and a locking hole is provided on the turntable. A locking rod that moves up and down is connected to the lifting platform. The lower end of the locking rod is inserted into the locking hole to lock the turntable. A positioning spring is installed between the locking rod and the lifting platform. During the downward movement of the lifting platform, the upper end of the positioning rod is inserted into the positioning hole, and at the same time, the unlocking rod pushes against the locking rod and pushes the locking rod upward, causing the lower end of the locking rod to disengage from the locking hole.

[0022] While the water bath heats the battery, the rotating base rotates, causing the battery to rotate along with it within the water bath. This improves the uniformity of water temperature within the bath, resulting in more even heat exchange and increased efficiency. Initially, the lifting platform is at its highest position. At this point, the unlocking rod and locking rod are separated, the locking rod is inserted into the locking hole, and the positioning rod is separated from its positioning hole. Therefore, the turntable is limited by the locking rod and cannot rotate, preventing the turntable from driving the rotating base to rotate. As the lifting platform moves downward, the upper end of the positioning rod inserts into the positioning hole, and simultaneously, the unlocking rod pushes the locking rod upward, disengaging the lower end of the locking rod from the locking hole. The turntable can then rotate and drive the rotating base to rotate as well.

[0023] A method for charging and discharging a power battery using a water bath device includes the following steps:

[0024] S1, clamp the battery onto the battery clamping unit;

[0025] S2, Install the tray onto the mounting base;

[0026] S3, the lifting platform moves downwards, the waterproof jacket seals onto the outer wall of the battery, and at the same time, the positive electrode contact rod, the negative electrode contact rod, and the battery temperature detection contact rod touch the positive electrode, the negative electrode, and the surface of the battery respectively; at the same time, the upper end of the positioning rod is inserted into the positioning hole, and the unlocking rod pushes the locking rod upwards, so that the lower end of the locking rod is disengaged from the locking hole.

[0027] S4, water is supplied to the water bath through the inlet pipe, and the water level detector detects the water level in the water bath. When the water level reaches the set value, the outlet valve is opened, so that water is supplied to the water bath while water is discharged at the same time, so that the inlet flow rate and the outlet flow rate are consistent. The drive motor starts and drives the turntable to rotate. The turntable drives the rotating seat and the turntable to rotate together through the positioning rod.

[0028] S5, the positive and negative contacts charge and discharge the battery. The water temperature is detected by the water temperature detector. When the water temperature exceeds the set temperature range, the flow rate of the inlet and outlet water is adjusted to regulate the water temperature and keep it within the set range.

[0029] S6, after the battery has finished charging and discharging, drain the water from the water bath and raise the lifting platform.

[0030] S7, remove the tray along with the battery from the mounting base.

[0031] The water bath has high heat exchange efficiency during battery charging and discharging, and the whole process is completed automatically, with a high degree of automation.

[0032] Compared with the prior art, the beneficial effects of the present invention are: (1) the power battery water bath charging and discharging device can reduce the energy consumption of the production process and improve the temperature control accuracy of the battery during charging and discharging; (2) the whole process is completed automatically and the degree of automation is high; (3) the battery immersion at different liquid levels can be controlled. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0034] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0035] In the diagram: 1. Fixed base, 2. Tray, 3. Lifting platform, 4. Water bath, 5. Battery, 6. Water temperature detector, 7. Water level detector, 8. Positive contact rod, 9. Negative contact rod, 10. Battery temperature detection contact rod, 11. Water flow channel, 12. Water inlet, 13. Water inlet pipe, 14. Water outlet, 15. Water outlet pipe, 16. Water outlet valve, 17. Mounting slot, 18. Drain pipe, 19. Drain branch pipe, 20. Drain pump, 21. Support platform, 22. Position sensor, 23. Positioning pin, 24. Positioning hole, 25. Water inlet telescopic pipe, 26. Water inlet insertion pipe, 27. Water inlet piston cylinder, 28. Water inlet 29. Pump, 30. Outlet telescopic pipe, 31. Outlet insertion pipe, 32. Outlet piston cylinder, 33. Moving seat, 34. Lifting piston cylinder, 35. Lifting guide rod, 36. Limit rod, 37. Limit sensor, 38. Jacket, 39. Support pad, 40. Waterproof jacket, 41. Rotating seat, 42. Turntable, 43. Motor, 44. Positioning rod, 45. Positioning insertion hole, 46. Unlocking rod, 47. Locking hole, 48. Locking rod, 49. Positioning spring, 50. Extension sleeve, 51. Top plate, 52. Connecting ring, 53. Protruding ring, 54. Anti-rotation rod, 55. Anti-rotation seat, 56. Top rod, 57. Limit spring. Detailed Implementation

[0036] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0037] Example 1: A power battery water bath charging and discharging device (see attached) Figure 1 The device includes a fixed base 1, a tray 2, and a lifting platform 3. The tray is mounted on the fixed base and has a water bath 4. Several battery clamping units are arranged at the bottom of the water bath, and batteries 5 are clamped on the battery clamping units. The lifting platform has a downward-extending water temperature detector 6 and a water level detector 7. A positive electrode contact rod 8, a negative electrode contact rod 9, and a battery temperature detection contact rod 10 are installed on the lifting platform and on each battery respectively. The tray has a water flow channel 11, and the bottom of the water bath has several water inlet holes 12 that communicate with the water flow channel. The water flow channel is connected to a water inlet pipe 13. Several water outlet holes 14 are arranged vertically and horizontally at intervals at the top of the water bath. The water outlet holes are connected to a water outlet pipe 15, and a water outlet valve 16 is installed on the water outlet pipe. The lifting platform is mounted on the fixed base to achieve vertical lifting and moving.

[0038] The mounting base has a mounting slot 17, in which the tray is installed. A drain pipe 18 is connected to the bottom of the mounting slot, and a drain branch pipe 19 is connected between the drain pipe and the inlet pipe. Valves are installed on both the drain pipe and the drain branch pipe. The drain pipe is connected to a drain pump 20. A support platform 21 and a position sensor 22 are arranged at the bottom of the mounting slot. A positioning pin 23 is provided on the support platform, and a positioning hole 24 is provided on the bottom of the tray corresponding to the positioning pin. The positioning pin is inserted into the positioning hole, and the position sensor is in contact with the bottom surface of the tray.

[0039] An inlet telescopic pipe 25 and an inlet insert pipe 26 connect the inlet pipe and the water flow channel. An inlet piston cylinder 27 is mounted on a fixed base, and the telescopic rod of the inlet piston cylinder is connected to the inlet insert pipe, which is inserted into the opening end of the water flow channel. An inlet pump 28 is mounted on the inlet pipe. An outlet telescopic pipe 29 and an outlet insert pipe 30 connect the outlet pipe and the outlet hole. An outlet piston cylinder 31 is mounted on a fixed base, and the telescopic rod of the outlet piston cylinder is connected to a movable base 32. All outlet insert pipes are connected to the movable base, and one end of the outlet insert pipe is fitted into the outlet hole. All outlet telescopic pipes are connected in parallel to the same outlet pipe, and valves are installed on the outlet insert pipes. All valves in this invention, including the outlet valve, are solenoid valves for easy automatic control.

[0040] A lifting piston cylinder 33 and a lifting guide rod 34 are installed on the fixed base. The extension rod of the lifting piston cylinder is connected to the lifting platform, and the lifting guide rod is movably sleeved with the lifting platform. A limit rod 35 is connected to the fixed base, and a limit sensor 36 is installed on the upper end of the limit rod. The battery clamping unit includes a clamping sleeve 37 and a support pad 38 set inside the clamping sleeve. The battery adapter is inserted into the clamping sleeve, and the lower end of the battery is supported on the support pad.

[0041] During battery charging and discharging, the battery is clamped onto the battery clamping unit, ensuring reliable positioning. Then, the entire tray, along with the battery, is installed onto the mounting base. The lifting platform moves downwards, and the positive, negative, and battery temperature detection contacts the positive, negative, and battery surfaces, respectively. Water is supplied to the water bath through the inlet pipe. A water level detector monitors the water level; when it reaches the set value, the outlet valve opens, allowing water to flow in and out simultaneously, maintaining a consistent flow rate. The positive and negative contacts charge and discharge the battery. The water temperature detector monitors the water bath temperature; if it exceeds the set range, the inlet and outlet flow rates are adjusted to regulate the temperature and maintain it within the set range. After charging and discharging, the water in the water bath is drained, and the lifting platform is raised. The tray, along with the battery, is removed from the mounting base. Water bath cooling significantly improves heat exchange efficiency. Compared to traditional ambient temperature control methods, this invention reduces the temperature control time required for each restart. Simultaneously, energy consumption is reduced by more than 30% compared to traditional methods, and the uniformity of water bath temperature control is also greatly improved. Traditional temperature control methods can only maintain battery temperature uniformity within ±4℃, while this invention can improve battery temperature uniformity to at least ±2℃. Several water outlets are spaced vertically to allow for control of battery immersion at different liquid levels.

[0042] Example 2: A power battery water bath charging and discharging device (see attached) Figure 2 Its structure is similar to that of Embodiment 1, the main difference being that in this embodiment, a waterproof jacket 39 is installed on the lower surface of the lifting platform corresponding to the battery. The positive electrode contact rod, negative electrode contact rod, and battery temperature detection contact rod corresponding to a battery are placed inside the waterproof jacket. After the lifting platform moves downward into position, the waterproof jacket seals onto the outer wall of the battery. A sealing ring is installed on the inner wall of the waterproof jacket, which can position the battery and improve the stability of battery clamping.

[0043] A rotating base 40 is installed at the bottom of the water bath, and a battery clamping unit is installed on the rotating base. A turntable 41 is provided on the lifting platform corresponding to the rotating base. A motor 42 for driving the turntable is installed on the lifting platform. Several positioning rods 43 are connected to the rotating base, and positioning holes 44 are provided on the turntable corresponding to the positioning rods. An unlocking rod 45 is provided on the tray, and a locking hole 46 is provided on the turntable. A locking rod 47 that moves up and down is connected to the lifting platform. The lower end of the locking rod is inserted into the locking hole to lock the turntable. A positioning spring 48 is installed between the locking rod and the lifting platform. During the downward movement of the lifting platform, the upper end of the positioning rod is inserted into the positioning hole, and at the same time, the unlocking rod pushes the locking rod upward, and the lower end of the locking rod disengages from the locking hole. An extension sleeve 49 is provided on the lifting platform corresponding to the locking rod. The positioning spring is installed in the extension sleeve, and the locking rod is connected to the extension sleeve. A cap is connected to the upper end of the extension sleeve, and the upper end of the locking rod extends out of the extension sleeve. The upper end of the locking rod is connected to the top plate 50, and the upper end of the unlocking rod is corresponding to the top plate. The motor output shaft is connected to a gear, and a gear ring is provided on the edge of the turntable. The gear meshes with the gear ring for transmission.

[0044] The bottom of the water bath has an upwardly protruding connecting ring 51, and the lower end of the rotating seat has a convex ring 52. The convex ring is rotatably fitted over the connecting ring. The rotating seat has through holes corresponding to the battery clamping unit. Several ball bearings are installed on the lower end face of the convex ring. An anti-rotation mechanism for locking the rotating seat is installed on the fixed seat. The anti-rotation mechanism includes an anti-rotation rod 53 and an anti-rotation seat 54. The anti-rotation seat is installed on the positioning rod and has an anti-rotation slot. The anti-rotation rod is hinged to the fixed seat. A top rod 55 is connected to the movable seat. A limiting spring 56 is connected between the anti-rotation rod and the fixed seat. The end of the top rod abuts against the anti-rotation rod. Before the water outlet tube is inserted into the water outlet hole, under the action of the limiting spring, one end of the anti-rotation rod is inserted into the anti-rotation slot to limit and lock the rotating seat. After the water outlet tube is inserted into the water outlet hole, the top rod pushes the anti-rotation rod to rotate, causing the end of the anti-rotation rod to disengage from the anti-rotation slot, eliminating the constraint on the rotating seat, and allowing the anti-rotation seat to rotate. Other structures are the same as in Embodiment 1.

[0045] A method for charging and discharging a power battery using a water bath device includes the following steps:

[0046] S1, clamp the battery onto the battery clamping unit;

[0047] S2, Install the tray onto the mounting base;

[0048] S3, the lifting platform moves downwards, the waterproof jacket seals onto the outer wall of the battery, and at the same time, the positive electrode contact rod, negative electrode contact rod, and battery temperature detection contact rod touch the positive electrode, negative electrode, and surface of the battery respectively; simultaneously, the upper end of the positioning rod is inserted into the positioning hole, and the unlocking rod pushes the locking rod upwards, causing the lower end of the locking rod to disengage from the locking hole; the water inlet piston cylinder and the water outlet piston cylinder work, causing the water inlet pipe to be inserted into the opening end of the water flow channel and the water outlet pipe to be inserted into the water outlet hole. At this time, the top rod connected to the moving base pushes the anti-rotation rod to rotate, causing the end of the anti-rotation rod to disengage from the anti-rotation slot on the anti-rotation base;

[0049] S4, water is supplied to the water bath through the inlet pipe, and the water level detector detects the water level in the water bath. When the water level reaches the set value, the outlet valve is opened, so that water is supplied to the water bath while water is discharged at the same time, so that the inlet flow rate and the outlet flow rate are consistent. The drive motor starts and drives the turntable to rotate. The turntable drives the rotating seat and the turntable to rotate together through the positioning rod.

[0050] S5, the positive and negative contacts charge and discharge the battery. The water temperature is detected by the water temperature detector. When the water temperature exceeds the set temperature range, the flow rate of the inlet and outlet water is adjusted to regulate the water temperature and keep it within the set range.

[0051] S6, after the battery is fully charged and discharged, drain the water from the water bath and raise the lifting platform; the inlet and outlet piston cylinders work to pull the inlet and outlet pipes out of the tray;

[0052] S7, remove the tray along with the battery from the mounting base.

[0053] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications may be made without departing from the technical solutions described in the claims.

Claims

1. A power battery water bath charging and discharging device, characterized in that, The system includes a fixed base, a tray, and a lifting platform. The tray is mounted on the fixed base and has a water bath. Several battery clamping units are arranged at the bottom of the water bath, and batteries are clamped in these units. The lifting platform has downward-extending water temperature and water level detectors. Each battery is equipped with a corresponding positive electrode contact, negative electrode contact, and battery temperature detection contact. The tray has a water flow channel, and the bottom of the water bath has several water inlet holes communicating with the water flow channel. The water flow channel is connected to a water inlet pipe. The upper part of the water bath has several water outlet holes spaced vertically, connected to a water outlet pipe with a water outlet valve installed on the pipe. The lifting platform, mounted on the fixed base, allows for vertical movement. A rotating base is installed at the bottom of the water bath, and a battery clamping unit is mounted on the rotating base. A turntable is provided on the lifting platform corresponding to the rotating base. A motor for driving the turntable is installed on the lifting platform. Several positioning rods are connected to the rotating base, and positioning holes are provided on the turntable corresponding to the positioning rods. An unlocking rod is provided on the tray, and a locking hole is provided on the turntable. A locking rod that moves up and down is connected to the lifting platform. The lower end of the locking rod is inserted into the locking hole to lock the turntable. A positioning spring is installed between the locking rod and the lifting platform. During the downward movement of the lifting platform, the upper end of the positioning rod is inserted into the positioning hole, and at the same time, the unlocking rod pushes against the locking rod, pushing the locking rod upward, and the lower end of the locking rod disengages from the locking hole.

2. The power battery water bath charging and discharging device according to claim 1, characterized in that, The mounting base is equipped with a mounting groove, the tray is installed in the mounting groove, the bottom of the mounting groove is connected to the drain pipe, and a drain branch pipe is connected between the drain pipe and the inlet pipe.

3. The power battery water bath charging and discharging device according to claim 2, characterized in that, A support platform and a positioning sensor are installed at the bottom of the mounting slot. The support platform is equipped with a positioning pin, and the bottom of the tray is equipped with a positioning hole corresponding to the positioning pin. The positioning pin is inserted into the positioning hole, and the positioning sensor is attached to the bottom surface of the tray.

4. The power battery water bath charging and discharging device according to claim 1, characterized in that, The inlet pipe and the water flow channel are connected by an inlet telescopic pipe and an inlet insert pipe. An inlet piston cylinder is installed on the fixed base. The telescopic rod of the inlet piston cylinder is connected to the inlet insert pipe. The inlet insert pipe is inserted into the opening end of the water flow channel.

5. The power battery water bath charging and discharging device according to claim 1, characterized in that, Both the water outlet pipe and the water outlet hole are connected by a water outlet telescopic pipe and a water outlet insertion pipe. A water outlet piston cylinder is installed on the fixed base. The telescopic rod of the water outlet piston cylinder is connected to the movable base. The water outlet insertion pipe is connected to the movable base. One end of the water outlet insertion pipe is adapted to be inserted into the water outlet hole.

6. The power battery water bath charging and discharging device according to claim 1, characterized in that, The battery clamping unit includes a clamping sleeve and a support pad disposed within the clamping sleeve. The battery adapter is inserted into the clamping sleeve and the lower end of the battery is supported on the support pad.

7. The power battery water bath charging and discharging device according to claim 1, characterized in that, A lifting piston cylinder and a lifting guide rod are installed on the fixed base. The extension rod of the lifting piston cylinder is connected to the lifting platform, and the lifting guide rod is movably connected to the lifting platform. A limit rod is connected to the fixed base, and a limit sensor is installed on the upper end of the limit rod.

8. The power battery water bath charging and discharging device according to claim 1, characterized in that, A waterproof jacket is installed on the lower surface of the lifting platform corresponding to the battery. The positive terminal contact rod, negative terminal contact rod, and battery temperature detection contact rod corresponding to a battery are placed inside the waterproof jacket. After the lifting platform moves down into place, the waterproof jacket is sealed and fitted onto the outer wall of the battery.

9. A power battery water bath charging and discharging method, characterized in that, Operating the power battery water bath charging and discharging device according to claim 8 includes the following steps: S1, clamp the battery onto the battery clamping unit; S2, Install the tray onto the mounting base; S3, the lifting platform moves downwards, the waterproof jacket seals onto the outer wall of the battery, and at the same time, the positive electrode contact rod, the negative electrode contact rod, and the battery temperature detection contact rod touch the positive electrode, the negative electrode, and the surface of the battery respectively; at the same time, the upper end of the positioning rod is inserted into the positioning hole, and the unlocking rod pushes the locking rod upwards, so that the lower end of the locking rod is disengaged from the locking hole. S4, water is supplied to the water bath through the inlet pipe, the water level detector detects the water level in the water bath, when the water level reaches the set value, the outlet valve is opened, so that water is supplied to the water bath at the same time and water is discharged at the same time, so that the inlet flow rate and the outlet flow rate are consistent; the drive motor starts and drives the turntable to rotate, and the turntable drives the rotating seat and the turntable to rotate together through the positioning rod. S5, the positive and negative contacts charge and discharge the battery. The water temperature is detected by the water temperature detector. When the water temperature exceeds the set temperature range, the flow rate of the inlet and outlet water is adjusted to regulate the water temperature and keep it within the set range. S6, after the battery has finished charging and discharging, drain the water from the water bath and raise the lifting platform. S7, remove the tray along with the battery from the mounting base.

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