A new energy vehicle battery cell automatic detection device and method

Abstract

The present invention discloses an automatic detection device and method for battery cells for new energy vehicles, belonging to the field of battery cell detection. An automatic detection device for battery cells for new energy vehicles, including a detection barrel and a controller, also includes: a heat exchange tube arranged in the detection barrel, the heat exchange tube is used to change the ambient temperature of the battery cell when detecting the battery cell; a fixed frame arranged in the detection barrel, and an impact rod is slidably connected to the fixed frame. The present invention uses a magnetic suction plug rod to intermittently enter the magnetic suction plug hole, so that the detection frame intermittently hits the detection seat to generate vibration, and the impact head intermittently impacts the battery cell, and also causes the telescopic airbag to intermittently extract the gas generated by the battery cell when it is working. On the one hand, it realizes the vibration impact test of the battery cell, thereby detecting the safety of the battery cell in harsh environment, and on the other hand, it can detect the gas generated by the battery cell when it is working, and judge whether the chemical reaction in the battery cell is stable.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell detection, and in particular to a device and method for automatically detecting battery cells for new energy vehicles. Background Art

[0002] Battery cell testing for new energy vehicles is a key link to ensure their safety, reliability and performance. Battery cells are the core components of the power system of new energy vehicles, and their performance directly affects the operating efficiency and safety of the entire vehicle. The following is a detailed description of battery cell testing for new energy vehicles: Testing purpose: Ensure that battery cells meet national and industry safety standards. Evaluate the performance of battery cells, including capacity, cycle life, charge and discharge efficiency, etc. Detect the stability and durability of battery cells under extreme conditions, such as high temperature, low temperature, overcharge, over discharge, etc. Verify the safety of battery cells in the event of collision and mechanical damage to prevent battery short circuit and fire. Testing items: Safety testing: including overcharge protection, over discharge protection, short circuit protection, temperature control, etc. Performance testing: Test the capacity, cycle life, charge and discharge rate, energy density, etc. of the battery. Reliability testing: Simulate performance changes after long-term use to evaluate the reliability of the battery. Environmental adaptability testing: including performance tests under environmental conditions such as high temperature, low temperature, and damp heat. Mechanical strength testing: Evaluate the stability of the battery when subjected to mechanical shock or vibration. Collision safety testing: Simulate the safety performance of the battery during a vehicle collision.

[0003] At present, when testing battery cells, it is necessary to test the charging and discharging performance of the battery cells under different temperature conditions to ensure the accuracy of the battery cell testing. At the same time, it is necessary to test the performance of the battery cells under vibration and impact to ensure the safety of battery operation. Based on this, an automatic detection device and method for battery cells for new energy vehicles are proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that it is necessary to detect the charging and discharging performance of battery cells under different temperature conditions to ensure the accuracy of battery cell detection, and at the same time it is necessary to detect the performance of battery cells under vibration and impact to ensure the safety of battery operation, and to propose an automatic detection device and method for battery cells for new energy vehicles.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An automatic detection device for battery cells for new energy vehicles comprises a detection barrel and a controller, and further comprises: a heat exchange tube arranged in the detection barrel, the heat exchange tube is used to change the ambient temperature of the battery cell when detecting the battery cell; a fixed frame arranged in the detection barrel, an impact rod is slidably connected to the fixed frame, the two ends of the impact rod are respectively fixedly connected to an impact head and a fixed plate, an impact spring is sleeved on the impact rod, the two ends of the impact spring are respectively fixedly connected to the fixed frame and the impact head, and the end of the fixed plate away from the impact rod is fixedly connected to a connecting rope, wherein the impact head is arranged on the periphery of the battery cell, and the impact head intermittently impacts the battery cell under the action of the impact spring and the connecting rope.

[0007] In order to perform charge and discharge tests on the battery cells and detect the performance of the battery cells, preferably, it also includes a detection seat fixedly connected to the bottom of the detection barrel, the detection seat is provided with a slide groove, a slide column is slidably connected in the slide groove, a detection frame is fixedly connected to the top of the slide column, the detection frame is provided with a detection groove, the inner bottom of the detection groove is fixedly connected to a pole plate, wherein the detection frame can slide in the detection seat.

[0008] In order to extract the gas generated when the battery cell is working, it further includes a fixed cylinder fixedly connected to the heat exchange tube, the middle part of the fixed cylinder is rotatably connected to a reciprocating screw rod, the reciprocating screw rod is located in the internal part of the fixed cylinder and is fixedly connected to a blade, the reciprocating screw rod is threadedly connected to an air suction frame, the air suction frame is provided with an air suction groove, and the inner wall of the air suction frame is provided with an air suction hole, wherein the air suction hole is arranged opposite to the battery cell, the interior of the detection barrel is fixedly connected to a fixed plate, and the two ends of the reciprocating screw rod are rotatably connected to the fixed plate and the inner bottom of the detection barrel respectively.

[0009] In order to extract and detect the gas generated when the battery cell is working, it further includes a telescopic airbag fixedly connected in the slide groove, the telescopic airbag is provided with an exhaust hole, the telescopic airbag is fixedly connected with an exhaust pipe, the inner bottom of the telescopic airbag is fixedly connected with a gas detection head, wherein the end of the exhaust pipe away from the telescopic airbag is fixedly connected to the bottom of the suction frame, the exhaust pipe is connected to the exhaust groove, and the exhaust hole runs through the detection seat.

[0010] In order to make the battery cell vibrate during operation, it further includes a sleeve fixedly connected to the top of the air suction frame, a piston plate is slidably connected inside the sleeve, an adjustment plate is fixedly connected to the top of the piston plate, and a magnetic suction plug rod is fixedly connected to the bottom of the adjustment plate, wherein a magnetic suction socket is opened on the top of the detection frame, the magnetic suction socket is adapted to the magnetic suction plug rod, the bottom position of the piston plate in the sleeve is filled with liquid mercury, the adjustment plate is slidably connected to the reciprocating screw rod, and the magnetic suction plug rod passes through the air suction frame and is slidably connected to the air suction frame.

[0011] In order to change the humidity inside the detection barrel and detect the working performance of the battery under hot and humid conditions, it further includes a connecting tube fixedly connected to the heat exchange tube, the end of the connecting tube is fixedly connected to a water spray head, a through groove is provided on the connecting tube, the bottom of the connecting tube is fixedly connected to a telescopic rod, a reset spring is sleeved on the telescopic rod, the bottom of the telescopic rod is fixedly connected to a magnetic bracket, and the magnetic bracket is provided with a through hole, wherein the two ends of the reset spring are respectively fixedly connected to the connecting tube and the magnetic bracket, the top of the adjusting plate is fixedly connected to a magnetic plate, and the magnetic properties of the magnetic plate and the magnetic bracket are opposite.

[0012] Preferably, the controller is installed outside the detection barrel, an observation window is provided on the detection barrel, and a barrel cover is installed on the top of the detection barrel.

[0013] Preferably, one end of the heat exchange tube is fixedly connected to a water inlet pipe, and one end of the heat exchange tube away from the water inlet pipe is fixedly connected to a drain pipe, the water inlet pipe is fixedly connected to the detection barrel, and the drain pipe is fixedly connected to the detection barrel.

[0014] Furthermore, one end of the connecting rope away from the fixed plate is fixedly connected to the bottom of the sliding column, the connecting rope passes through the fixing frame and is slidably connected to the fixing frame, and the impact rod passes through the fixing frame and is slidably connected to the fixing frame.

[0015] A method for automatically detecting battery cells for new energy vehicles comprises the following steps:

[0016] Step 1: First open the barrel cover, insert the battery cell into the detection slot so that the tabs of the battery cell are in contact with the plates, and then close the barrel cover;

[0017] Step 2: Connect the water inlet pipe to the external air source so that the heat exchange tube changes the temperature inside the detection barrel;

[0018] Step 3: Start the gas detection head to detect the gas generated when the battery cell is working;

[0019] Step 4: Use the controller to detect the working status of the battery cells at different temperatures.

[0020] Compared with the prior art, the present invention provides a device and method for automatically detecting battery cells for new energy vehicles, which has the following beneficial effects:

[0021] 1. The automatic detection device for battery cells for new energy vehicles intermittently enters the magnetic insertion hole through the magnetic insertion rod, so that the detection frame intermittently hits the detection seat to generate vibration, and the impact head intermittently impacts the battery cell, and the telescopic airbag intermittently extracts the gas generated by the battery cell when it is working. On the one hand, it realizes the vibration impact test of the battery cell, so as to detect the safety of the battery cell in harsh environment, and on the other hand, it can detect the gas generated by the battery cell when it is working and judge whether the chemical reaction in the battery cell is stable.

[0022] 2. The automatic detection device for battery cells for new energy vehicles can simulate the operation of battery cells at different temperatures through the temperature change of water flow in the heat exchange tube, and by detecting the temperature change inside the barrel, the magnetic plate can adsorb the magnetic frame and slide downward when it is in a high temperature state, so that the sprinkler head sprays water mist, thereby testing the performance of the battery cells under high temperature, low temperature and humid heat conditions, ensuring the normal and stable operation of the battery cells in different environments, and ensuring the safety of the battery cells during operation.

[0023] 3. The automatic detection device for battery cells for new energy vehicles, through the setting of liquid mercury, can change the depth of the magnetic suction rod inserted into the magnetic suction socket when the temperature inside the detection barrel is in a changing state, thereby changing the adsorption force of the magnetic suction rod on the magnetic suction socket, thereby changing the height of the detection frame, so that the vibration amplitude of the battery cell can be different, realizing the performance detection of the battery cell under different vibration states, expanding the detection range of the battery cell, and improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of an automatic detection device for battery cells for new energy vehicles proposed by the present invention;

[0025] Figure 2 A three-dimensional partially cutaway structural schematic diagram of an automatic detection device for battery cells for new energy vehicles proposed by the present invention;

[0026] Figure 3 A schematic diagram of the three-dimensional structure of a detection base of an automatic detection device for battery cells for new energy vehicles proposed by the present invention;

[0027] Figure 4 This is a schematic diagram of a three-dimensional partially cutaway structure of a detection frame of an automatic detection device for battery cells for new energy vehicles proposed by the present invention;

[0028] Figure 5 This is a schematic diagram of the front middle section structure of an automatic detection device for battery cells for new energy vehicles proposed by the present invention;

[0029] Figure 6The invention provides a battery cell automatic detection device for new energy vehicles. Figure 5 The enlarged structural diagram at A in the middle;

[0030] Figure 7 This is a schematic diagram of a partially cutaway structure of a battery cell automatic detection device for new energy vehicles proposed by the present invention;

[0031] Figure 8 This is a schematic diagram of the three-dimensional structure of an impact head of an automatic detection device for battery cells for new energy vehicles proposed by the present invention;

[0032] Fig. 9 This is a schematic diagram of the three-dimensional structure of a water spray head of an automatic detection device for battery cells for new energy vehicles proposed by the present invention.

[0033] In the figure: 1. detection barrel; 2. controller; 3. observation window; 4. barrel cover; 5. water inlet pipe; 6. heat exchange pipe; 7. drain pipe; 8. fixed cylinder; 9. blade; 10. reciprocating screw rod; 11. detection seat; 12. slide slot; 13. telescopic airbag; 14. gas detection head; 15. exhaust hole; 16. exhaust pipe; 17. slide column; 18. detection frame; 19. plate; 20. magnetic suction jack; 21. suction rack; 22. exhaust slot; 23. Exhaust hole; 24. Sleeve; 25. Piston plate; 26. Adjustment plate; 27. Magnetic rod; 28. Connecting rope; 29. ​​Fixing frame; 30. Fixing plate; 31. Impact rod; 32. Impact head; 33. Impact spring; 34. Magnetic plate; 35. Magnetic frame; 36. Through hole; 37. Connecting pipe; 38. Telescopic rod; 39. Reset spring; 40. Through slot; 41. Spray head; 42. Detection slot; 43. Fixing plate. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to 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.

[0036] Example:

[0037] Reference Figure 1-Figure 8, an automatic detection device for battery cells for new energy vehicles, including a detection barrel 1 and a controller 2, the controller 2 is installed on the outside of the detection barrel 1, the detection barrel 1 is provided with an observation window 3, the top of the detection barrel 1 is provided with a barrel cover 4, and also includes: a heat exchange tube 6 arranged in the detection barrel 1, the heat exchange tube 6 is used to change the ambient temperature of the battery cell when the battery cell is detected, one end of the heat exchange tube 6 is fixedly connected to a water inlet pipe 5, and the end of the heat exchange tube 6 away from the water inlet pipe 5 is fixedly connected to a drain pipe 7, the water inlet pipe 5 is fixedly connected to the detection barrel 1, and the drain pipe 7 is fixedly connected to the detection barrel 1. The tube 7 is fixedly connected to the detection barrel 1, and also includes a detection seat 11 fixedly connected to the bottom of the detection barrel 1, a slide groove 12 is provided in the detection seat 11, a slide column 17 is slidably connected in the slide groove 12, a detection frame 18 is fixedly connected to the top of the slide column 17, a detection groove 42 is provided on the detection frame 18, and a plate 19 is fixedly connected to the inner bottom of the detection groove 42, wherein the detection frame 18 can slide in the detection seat 11, and also includes a telescopic airbag 13 fixedly connected in the slide groove 12, an exhaust hole 15 is provided on the telescopic airbag 13, and the telescopic airbag 1 3 is fixedly connected with an exhaust pipe 16, and the inner bottom of the telescopic airbag 13 is fixedly connected with a gas detection head 14, wherein the end of the exhaust pipe 16 away from the telescopic airbag 13 is fixedly connected with the bottom of the suction frame 21, the exhaust pipe 16 is connected with the exhaust groove 22, the exhaust hole 15 passes through the detection seat 11 and is arranged on a fixed frame 29 in the detection barrel 1, and an impact rod 31 is slidably connected to the fixed frame 29, and the two ends of the impact rod 31 are respectively fixedly connected with an impact head 32 and a fixed plate 30, and an impact spring 33 is sleeved on the impact rod 31, and the impact spring 33 The two ends are respectively fixedly connected to the fixing frame 29 and the impact head 32, and the end of the fixing plate 30 away from the impact rod 31 is fixedly connected with the connecting rope 28, wherein the impact head 32 is arranged on the periphery of the battery cell, and the impact head 32 intermittently impacts the battery cell under the action of the impact spring 33 and the connecting rope 28, and the end of the connecting rope 28 away from the fixing plate 30 is fixedly connected to the bottom of the sliding column 17, the connecting rope 28 passes through the fixing frame 29 and is slidably connected to the fixing frame 29, and the impact rod 31 passes through the fixing frame 29 and is slidably connected to the fixing frame 29.

[0038] When in use, the barrel cover 4 is opened to insert the battery cell into the detection slot 42 so that the pole ear of the battery cell contacts the pole plate 19, and then the barrel cover 4 can be closed, and then the battery cell is charged and discharged and overcharge and over-discharge detection is performed through the controller 2. In this process, the external water source enters the heat exchange tube 6 through the water inlet pipe 5 and is discharged through the drain pipe 7. The temperature of the external water source changes from low to high, thereby changing the internal ambient temperature of the detection barrel 1, so that the ambient working temperature of the battery cell is in a changing state, thereby detecting the working performance of the battery cell under different ambient temperatures. During this process, the flow of water in the heat exchange tube 6 will impact the blade 9, so that the blade 9 drives the reciprocating screw 10 to rotate, so that the suction frame 21 slides up and down along the outer surface of the battery cell, so that the magnetic suction plug 27 is intermittently inserted into the magnetic suction plug 20. In the process of the suction frame 21 sliding upward, the detection frame 18 will drive the slide column 17 along the slide groove 12 under the action of the magnetic force, and then pull the fixed plate 30 through the connecting rope 28, so that the impact rod 31 drives the impact head 32 away from the battery cell. At the same time, the telescopic airbag 13 will automatically extend through the suction pipe 1 6 and the exhaust groove 22 and the exhaust hole 23 extract the gas generated by the battery cell when it is working, and the gas detection head 14 detects and analyzes the composition of the gas. When the slide column 17 slides along the slide groove 12, when the gravity of the detection frame 18 and the gravity of the battery cell are greater than the suction force between the magnetic suction rod 27 and the magnetic suction socket 20, the suction frame 21 slides again, which will cause the magnetic suction rod 27 to be pulled out of the magnetic suction socket 20, so that the detection frame 18 suddenly hits the detection seat 11 downward under the action of its own gravity and the gravity of the battery cell, and the battery cell is vibrated. The sudden impact of the detection frame 18 When the battery is moved downward, the connecting rope 28 will be loosened suddenly, so that the impact head 32 will impact the battery cell under the action of the impact spring 33, and the battery cell will be impacted. In this process, the sliding column 17 will hit the telescopic airbag 13, so that the gas in the telescopic airbag 13 will be discharged through the exhaust hole 15, and this process will be repeated until the working performance of the battery cell at the highest temperature is detected. The detected data will be displayed by the controller 2. After the detection is completed, the water flow in the heat exchange tube 6 will be completely discharged, and the barrel cover 4 will be opened to remove the battery cell from the detection tank 42.

[0039] By changing the temperature of the water flow in the heat exchange tube 6, the operation of the battery cells at different temperatures can be simulated, thereby testing the performance of the battery cells under high and low temperature conditions, ensuring the normal and stable operation of the battery cells in different environments, and ensuring the safety of the battery cells during operation. At the same time, a vibration impact test on the battery cells is implemented, thereby detecting the safety of the battery cells in harsh environments, and being able to detect the gas generated when the battery cells are working, and determine whether the chemical reaction in the battery cells is stable, thereby improving the accuracy of battery cell detection.

[0040] Reference Figure 2-Figure 6 , further comprising a fixed cylinder 8 fixedly connected to the heat exchange tube 6, a reciprocating screw rod 10 is rotatably connected to the middle part of the fixed cylinder 8, a blade 9 is fixedly connected to the reciprocating screw rod 10 located inside the fixed cylinder 8, an air suction frame 21 is threadedly connected to the reciprocating screw rod 10, an air suction groove 22 is provided in the air suction frame 21, an air suction hole 23 is provided on the inner wall of the air suction frame 21, wherein the air suction hole 23 is arranged facing the battery cell, a fixed plate 43 is fixedly connected to the inside of the detection barrel 1, and both ends of the reciprocating screw rod 10 are rotatably connected to the fixed plate 43 and the inner bottom of the detection barrel 1 respectively. The detection frame 18 further includes a sleeve 24 fixedly connected to the top of the suction frame 21, a piston plate 25 is slidably connected in the sleeve 24, an adjusting plate 26 is fixedly connected to the top of the piston plate 25, and a magnetic insertion rod 27 is fixedly connected to the bottom of the adjusting plate 26, wherein a magnetic suction socket 20 is provided on the top of the detection frame 18, the magnetic suction socket 20 is adapted to the magnetic insertion rod 27, the sleeve 24 is filled with liquid mercury at the bottom position of the piston plate 25, the adjusting plate 26 is slidably connected to the reciprocating screw 10, and the magnetic insertion rod 27 passes through the suction frame 21 and is slidably connected to the suction frame 21.

[0041] Since the water flow in the heat exchange tube 6 is in a flowing state and the temperature of the water flow is in a changing state, the water flow will impact the blade 9 to rotate the reciprocating screw 10, thereby driving the suction frame 21 to slide up and down along the outer surface of the reciprocating screw 10. In addition, since the temperature of the water flow in the heat exchange tube 6 is in a changing state, and the sleeve 24 is filled with liquid mercury, and the volume of the liquid mercury is in a changing state at different temperatures, at the lowest temperature, the volume of the liquid mercury will be reduced, so that the piston plate 25 drives the adjustment plate 26 to move downward, so that the magnetic suction plug 27 is inserted into the magnetic suction plug hole 20 to the deepest depth. As the temperature rises, the volume of the liquid mercury will gradually increase, thereby changing the depth of the magnetic suction plug 27 inserted into the magnetic suction plug hole 20. Since the depth of the magnetic suction plug 27 inserted into the magnetic suction plug hole 20 is in a changing state, the height of the detection frame 18 will be in a changing state, so that the vibration force generated by the detection frame 18 hitting the detection seat 11 is in a changing state.

[0042] The performance detection of battery cells under different vibration states is realized, the detection range of battery cells is expanded, and the detection accuracy is improved.

[0043] Reference Figure 2-Figure 4 , Figure 7 , Fig. 9, and also includes a connecting pipe 37 fixedly connected to the heat exchange tube 6, the end of the connecting pipe 37 is fixedly connected to a water spray head 41, a through groove 40 is provided on the connecting pipe 37, a telescopic rod 38 is fixedly connected to the bottom of the connecting pipe 37, a reset spring 39 is sleeved on the telescopic rod 38, a magnetic bracket 35 is fixedly connected to the bottom of the telescopic rod 38, and a through hole 36 is provided on the magnetic bracket 35, wherein the two ends of the reset spring 39 are respectively fixedly connected to the connecting pipe 37 and the magnetic bracket 35, and the top of the adjusting plate 26 is fixedly connected to a magnetic plate 34, and the magnetic properties of the magnetic plate 34 and the magnetic bracket 35 are opposite.

[0044] Due to the volume change of the liquid mercury in the sleeve 24, the distance between the adjustment plate 26 and the suction frame 21 will be in a changing state. When the temperature in the detection barrel 1 reaches 40 degrees Celsius, when the adjustment plate 26 moves to the top, the magnetic plate 34 fixed on the adjustment plate 26 will be able to absorb the magnetic frame 35. In the process of the adjustment plate 26 sliding downward, the magnetic frame 35 will be driven to slide along the through groove 40 under the action of the magnetic force, so that the through hole 36 enters the connecting pipe 37, so that the water spray head 41 can spray water mist. When the magnetic frame 35 is out of the suction state with the magnetic plate 34, the magnetic frame 35 will re-block the connecting pipe 37 under the action of the reset spring 39 and the telescopic rod 38, thereby realizing intermittent spraying of water mist.

[0045] Thereby, the performance of the battery cells under hot and humid conditions is tested, which ensures the normal and stable operation of the battery cells in different environments and the safety of the battery cells during operation.

[0046] Reference Figure 1-Figure 9 , a method for automatically detecting battery cells for new energy vehicles, comprising the following steps:

[0047] Step 1: First, open the barrel cover 4, insert the battery cell into the detection slot 42, so that the pole ear of the battery cell contacts the pole plate 19, and then close the barrel cover 4;

[0048] Step 2: Connect the water inlet pipe 5 to the external air source so that the heat exchange pipe 6 changes the temperature inside the detection barrel 1;

[0049] The battery cell is charged and discharged and overcharge and over-discharge are detected through the controller 2. In this process, external water enters the heat exchange tube 6 through the water inlet pipe 5 and is discharged through the drain pipe 7. The temperature of the external water source changes from low to high, thereby changing the internal ambient temperature of the detection barrel 1, so that the ambient operating temperature of the battery cell is in a changing state, thereby detecting the working performance of the battery cell under different ambient temperatures;

[0050] Step 3: Start the gas detection head 14 to detect the gas generated when the battery cell is working;

[0051] The flow of water in the heat exchange tube 6 will impact the blade 9, so that the blade 9 drives the reciprocating screw 10 to rotate, so that the suction frame 21 slides up and down along the outer surface of the battery cell, so that the magnetic suction plug rod 27 is intermittently inserted into the magnetic suction plug hole 20. In the process of the suction frame 21 sliding upward, the detection frame 18 will drive the slide column 17 along the slide groove 12 under the action of the magnetic force, and then pull the fixed plate 30 through the connecting rope 28, so that the impact rod 31 drives the impact head 32 away from the battery cell. At the same time, the telescopic airbag 13 will automatically extend to extract the gas generated by the battery cell during operation through the exhaust pipe 16, the exhaust groove 22 and the exhaust hole 23, and the gas detection head 14 detects and analyzes the composition of the gas. When the slide column 17 slides along the slide groove 12, when the detection frame 18 When the gravity of the self-gravity and the gravity of the battery cell is greater than the suction force between the magnetic suction rod 27 and the magnetic suction socket 20, the suction frame 21 slides again, which will cause the magnetic suction rod 27 to be pulled out of the magnetic suction socket 20, so that the detection frame 18 suddenly hits the detection seat 11 downward under the action of its own gravity and the gravity of the battery cell, and performs a vibration test on the battery cell. The sudden downward movement of the detection frame 18 will cause the connecting rope 28 to suddenly loosen, so that the impact head 32 impacts the battery cell under the action of the impact spring 33, and performs an impact test on the battery cell. In the process, the sliding column 17 will hit the telescopic airbag 13 so that the gas in the telescopic airbag 13 is discharged through the exhaust hole 15, and this process is repeated until the working performance of the battery cell at the highest temperature is detected;

[0052] Since the water flow in the heat exchange tube 6 is in a flowing state and the temperature of the water flow is in a changing state, the water flow will impact the blade 9 to rotate the reciprocating screw 10, thereby driving the suction frame 21 to slide up and down along the outer surface of the reciprocating screw 10. In addition, since the temperature of the water flow in the heat exchange tube 6 is in a changing state, and the sleeve 24 is filled with liquid mercury, and the volume of the liquid mercury is in a changing state at different temperatures, at the lowest temperature, the volume of the liquid mercury will be reduced, so that the piston plate 25 drives the adjustment plate 26 to move downward, so that the magnetic suction plug 27 is inserted into the magnetic suction plug hole 20 to the deepest depth. As the temperature rises, the volume of the liquid mercury will gradually increase, thereby changing the depth of the magnetic suction plug 27 inserted into the magnetic suction plug hole 20. Since the depth of the magnetic suction plug 27 inserted into the magnetic suction plug hole 20 is in a changing state, the height of the detection frame 18 will be in a changing state, so that the vibration force generated by the detection frame 18 hitting the detection seat 11 is in a changing state.

[0053] Due to the volume change of the liquid mercury in the sleeve 24, the distance between the adjustment plate 26 and the suction frame 21 will be in a changing state. When the temperature in the detection barrel 1 reaches 40 degrees Celsius, when the adjustment plate 26 moves to the top, the magnetic plate 34 fixed on the adjustment plate 26 will be able to absorb the magnetic frame 35. In the process of the adjustment plate 26 sliding downward, the magnetic frame 35 will be driven to slide along the through groove 40 under the action of the magnetic force, so that the through hole 36 enters the connecting pipe 37, so that the water spray head 41 can spray water mist. When the magnetic frame 35 is out of the suction state with the magnetic plate 34, the magnetic frame 35 will re-block the connecting pipe 37 under the action of the reset spring 39 and the telescopic rod 38, thereby realizing intermittent spraying of water mist.

[0054] Step 4: Detect the working status of the battery cells at different temperatures through the controller 2;

[0055] The data obtained by the detection will be displayed by the controller 2. After the detection is completed, the water flow in the heat exchange tube 6 is completely discharged, and the barrel cover 4 is opened to remove the battery cell from the detection tank 42.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic detection device for battery cells for new energy vehicles, comprising a detection barrel (1) and a controller (2), characterized in that: Also includes: A heat exchange tube (6) disposed in the detection barrel (1), the heat exchange tube (6) being used to change the ambient temperature of the battery cell when the battery cell is being detected; A fixed frame (29) is arranged in the detection barrel (1), an impact rod (31) is slidably connected to the fixed frame (29), and the two ends of the impact rod (31) are respectively fixedly connected to an impact head (32) and a fixed plate (30), an impact spring (33) is sleeved on the impact rod (31), and the two ends of the impact spring (33) are respectively fixedly connected to the fixed frame (29) and the impact head (32), and one end of the fixed plate (30) away from the impact rod (31) is fixedly connected to a connecting rope (28), wherein the impact head (32) is arranged on the periphery of the battery cell, and the impact head (32) intermittently impacts the battery cell under the action of the impact spring (33) and the connecting rope (28); It also comprises a detection seat (11) fixedly connected to the bottom of the detection barrel (1), a slide groove (12) being provided in the detection seat (11), a slide column (17) being slidably connected in the slide groove (12), a detection frame (18) being fixedly connected to the top of the slide column (17), a detection groove (42) being provided on the detection frame (18), an electrode plate (19) being fixedly connected to the inner bottom of the detection groove (42), wherein the detection frame (18) is capable of sliding in the detection seat (11); It also comprises a fixed cylinder (8) fixedly connected to the heat exchange tube (6), a reciprocating screw (10) being rotatably connected to the middle part of the fixed cylinder (8), a blade (9) being fixedly connected to the part of the reciprocating screw (10) located inside the fixed cylinder (8), an air suction frame (21) being threadedly connected to the reciprocating screw (10), an air suction groove (22) being provided inside the air suction frame (21), an air suction hole (23) being provided on the inner wall of the air suction frame (21), wherein the air suction hole (23) is arranged directly opposite to the battery cell, a fixed plate (43) being fixedly connected to the inside of the detection barrel (1), and two ends of the reciprocating screw (10) being rotatably connected to the fixed plate (43) and the inner bottom of the detection barrel (1), respectively; It also includes a telescopic airbag (13) fixedly connected in the slide groove (12), the telescopic airbag (13) is provided with an exhaust hole (15), the telescopic airbag (13) is fixedly connected to an exhaust pipe (16), the inner bottom of the telescopic airbag (13) is fixedly connected to a gas detection head (14), wherein one end of the exhaust pipe (16) away from the telescopic airbag (13) is fixedly connected to the bottom of the suction frame (21), the exhaust pipe (16) is connected to the exhaust groove (22), and the exhaust hole (15) passes through the detection seat (11); It also includes a sleeve (24) fixedly connected to the top of the suction frame (21), a piston plate (25) being slidably connected inside the sleeve (24), an adjustment plate (26) being fixedly connected to the top of the piston plate (25), and a magnetic suction plug rod (27) being fixedly connected to the bottom of the adjustment plate (26), wherein a magnetic suction plug hole (20) is provided at the top of the detection frame (18), the magnetic suction plug hole (20) being adapted to the magnetic suction plug rod (27), the sleeve (24) being filled with liquid mercury at the bottom of the piston plate (25), the adjustment plate (26) being slidably connected to the reciprocating screw rod (10), and the magnetic suction plug rod (27) passing through the suction frame (21) and being slidably connected to the suction frame (21); It also comprises a connecting pipe (37) fixedly connected to the heat exchange pipe (6), the end of the connecting pipe (37) being fixedly connected to a water spray head (41), the connecting pipe (37) being provided with a through groove (40), the bottom of the connecting pipe (37) being fixedly connected to a telescopic rod (38), the telescopic rod (38) being sleeved with a reset spring (39), the bottom of the telescopic rod (38) being fixedly connected to a magnetic frame (35), the magnetic frame (35) being provided with a through hole (36), wherein the two ends of the reset spring (39) are respectively fixedly connected to the connecting pipe (37) and the magnetic frame (35), and the top of the adjusting plate (26) being fixedly connected to a magnetic plate (34), the magnetic properties of the magnetic plate (34) and the magnetic frame (35) being opposite; Due to the change in volume of the liquid mercury in the sleeve (24), the distance between the adjustment plate (26) and the suction frame (21) will be in a changing state. When the temperature in the detection barrel (1) reaches 40 degrees Celsius, when the adjustment plate (26) moves to the top, the magnetic plate (34) fixed on the adjustment plate (26) will be able to absorb the magnetic frame (35). In the process of the adjustment plate (26) sliding downward, the magnetic frame (35) will be driven to slide along the through groove (40) under the action of magnetic force, so that the through hole (36) enters the connecting pipe (37), so that the water spray head (41) can spray water mist. When the magnetic frame (35) is separated from the suction state with the magnetic plate (34), the magnetic frame (35) will be blocked again on the connecting pipe (37) under the action of the reset spring (39) and the telescopic rod (38), thereby achieving intermittent spraying of water mist.

2. The automatic detection device for battery cells for new energy vehicles according to claim 1 is characterized in that: The controller (2) is installed outside the detection barrel (1); an observation window (3) is provided on the detection barrel (1); and a barrel cover (4) is installed on the top of the detection barrel (1).

3. The automatic detection device for battery cells for new energy vehicles according to claim 2 is characterized in that: One end of the heat exchange tube (6) is fixedly connected to a water inlet pipe (5), and one end of the heat exchange tube (6) away from the water inlet pipe (5) is fixedly connected to a drainage pipe (7), the water inlet pipe (5) is fixedly connected to the detection barrel (1), and the drainage pipe (7) is fixedly connected to the detection barrel (1).

4. The automatic detection device for battery cells for new energy vehicles according to claim 1, characterized in that: One end of the connecting rope (28) away from the fixed plate (30) is fixedly connected to the bottom of the sliding column (17), the connecting rope (28) passes through the fixed frame (29) and is slidably connected to the fixed frame (29), and the impact rod (31) passes through the fixed frame (29) and is slidably connected to the fixed frame (29).

5. A method for automatically detecting battery cells for new energy vehicles, using the automatic detection device for battery cells for new energy vehicles as claimed in claim 3, characterized in that: The steps include: Step 1: first open the barrel cover (4), insert the battery cell into the detection slot (42), so that the pole ear of the battery cell contacts the pole plate (19), and then close the barrel cover (4); Step 2: Connect the water inlet pipe (5) to an external air source so that the heat exchange pipe (6) changes the temperature inside the detection barrel (1); Step 3: Start the gas detection head (14) to detect the gas generated when the battery cell is working; Step 4: Detect the working status of the battery cells at different temperatures through the controller (2).

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