CN117516817A - High-performance power battery sealing performance test system - Google Patents

Abstract

The utility model provides a high performance power battery sealing performance test system, including the material loading conveying line, detect the transfer line, the seal box, closing mechanism, gas detection sensor, first tongs and second tongs, the material loading conveying line is used for the transmission of power battery that awaits measuring, the seal box includes first box, the second box and carries out evacuating device to the seal box, first box sets up on detecting the transfer line, and along with detecting the transfer line motion, the second box corresponds with closing mechanism's position, closing mechanism is with first box and second box closure in order to form the seal box, gas detection sensor detects the leak hunting gas in the seal box, first tongs and second tongs and movably set up between detecting the transfer line and the material loading transfer line, in order to get from first box and put the power battery that awaits measuring. The high-performance power battery sealing performance testing system can automatically detect the sealing performance of the power battery.

Description

High-performance power battery sealing performance test system

Technical Field

The invention relates to the technical field of battery helium detection, in particular to a high-performance power battery sealing performance testing system.

Background

With the rapid development of new energy vehicles, people have higher and higher requirements on the sealing and protecting performance of the power battery, and in some fields, the sealing performance of the power battery is required to meet the protection requirements of IP67, even IP 68.

In order to detect the sealing protection performance of the power battery PACK, a helium-based power battery leakage detection device is generally used for detecting the sealing performance.

The basic procedures are (1) helium is filled into a power battery; (2) Fixing the power battery by using a fixing device and placing the power battery in a sealing box; (3) vacuuming the sealed box; (4) Detecting helium scattered into the sealing box within a set time to judge the sealing protection performance of the power battery according to the content of the helium in the sealed space; and (5) taking out the power battery and entering the next production link.

The above-mentioned process is comparatively loaded down with trivial details, and when detecting, every step all needs the manual work to carry out repeatability operation, and is difficult to carry out the automation.

Disclosure of Invention

In order to solve the technical problems, the invention provides a high-performance power battery sealing performance testing system which can automatically detect the sealing performance of a power battery.

The invention provides a high-performance power battery sealing performance testing system which comprises a feeding conveying line, a detection transfer line, a sealing box, a closing mechanism, a gas detection sensor, a first gripper and a second gripper, wherein the feeding conveying line is used for conveying a power battery to be tested, the sealing box comprises a first box body, a second box body and a vacuumizing device, the first box body is arranged on the detection conveying line and moves along with the detection conveying line, the second box body corresponds to the position of the closing mechanism, when the detection conveying line conveys the first box body to the second box body, the closing mechanism closes the first box body and the second box body to form the sealing box, the vacuumizing device performs vacuumizing treatment on the sealing box, the gas detection sensor detects leakage gas in the sealing box, and the first gripper and the second gripper are sequentially arranged along the upstream and downstream directions of the detection conveying line and can be movably arranged between the detection conveying line and the first box body to be tested, and the battery to be tested is taken from the first box body to be tested.

Further, the high-performance power battery sealing performance testing system further comprises a control unit, wherein the control unit is electrically connected with the feeding conveying line, the detection conveying line, the vacuumizing device, the closing mechanism, the gas detection sensor, the first gripper and the second gripper so as to control the high-performance power battery sealing performance testing system.

Further, the second box is disposed above the first box, the closing mechanism includes a lifting motor disposed below the detection conveying line, and when the detection conveying line conveys the first box to below the second box, the closing mechanism lifts the first box so as to combine the first box and the second box into the sealing box.

Further, the high-performance power battery sealing performance testing system further comprises a defective product storage transmission line, the defective product storage transmission line and the feeding transmission line are respectively arranged on two sides of the detection transmission line, and the second gripper moves between the defective product storage transmission line, the detection transmission line and the feeding transmission line.

Further, the seal box further comprises a pressing mechanism and a containing groove for containing the power battery to be tested, the containing groove is arranged in the first box body, a first floating pressing plate is arranged in the containing groove, along with the closing or separating of the first box body and the second box body, the pressing mechanism is formed with a first state and a second state, the first box body and the second box body are closed, so that the pressing mechanism is in the first state, the pressing mechanism drives the first pressing plate to reduce the volume of the containing groove, the first box body is separated from the second box body, so that the pressing mechanism is in the second state, and the pressing mechanism drives the first pressing plate to increase the volume of the containing groove.

Further, the hold-down mechanism includes pressure head, second clamp plate and spliced pole, the pressure head set up in on the first box, the second clamp plate set up in on the second box, the spliced pole can follow self axis direction with set up in on the second box, the one end of spliced pole with first clamp plate links to each other, the other end with the second clamp plate links to each other, the position of pressure head with the position of second clamp plate corresponds, works as when first box with the second box is closed, the pressure head oppression second clamp plate makes the spliced pole follows self axis the direction motion of first clamp plate place, so as to drive first clamp plate presss from both sides tightly the power battery that awaits measuring.

Further, the driving mechanism further comprises an elastic piece, and the elastic piece is arranged between the second pressing plate and the second box body.

Further, the driving mechanism further comprises a sleeve, a through hole is formed in the side wall of the second box body, the sleeve is arranged in the through hole, and the connecting column is movably arranged in the sleeve along the axis direction of the connecting column.

Further, the pressure head comprises a connecting plate and a roller, one end of the connecting plate is connected with the outer side wall of the first box body, the other end extends towards the direction where the second box body is located, and the roller is arranged at one end, away from the first box body, of the connecting plate.

Further, the high-performance power battery sealing performance testing system further comprises a gas injection mechanism, the gas injection mechanism comprises a power source, a fixed pipe, a communicating pipe and a leakage detection gas source, the fixed pipe is fixed on the sealing box, the communicating pipe can be arranged in the fixed pipe in a penetrating mode in a reciprocating mode along the axis direction of the communicating pipe, the leakage detection gas source is communicated with the inside of the communicating pipe, the power source is connected with the communicating pipe, the communicating pipe is driven to move in the fixed pipe, so that the communicating pipe is formed with a stretching-in state and a shrinking state, the communicating pipe is communicated with a helium gas injection port of the power battery, and the communicating pipe is separated from contact with the helium gas injection port of the power battery in the shrinking state.

Further, the gas injection mechanism further comprises a fixing support, the fixing support is fixed on the wall of the sealing box, and the power source and the fixing pipe are arranged on the fixing support.

Further, a clamping mechanism capable of being loosened and tightened is arranged on the sealing box, and the fixing support is clamped in the clamping mechanism, so that the gas injection mechanism is detachably arranged on the sealing box.

Further, a permeation hole is formed in the wall of the box body of the sealing box, the fixing pipe stretches into the sealing box from the permeation hole, a third sealing ring is sleeved outside the fixing pipe, and the third sealing ring is arranged between the outer side wall of the fixing pipe and the inner side wall of the permeation hole.

Further, a pipeline interface is arranged on the communicating pipe, the gas injection mechanism further comprises a control valve, a first vacuum pump, a second vacuum pump and a leakage detection gas recovery tank, the leakage detection gas source, the first vacuum pump and the second vacuum pump are connected with the communicating pipe through the control valve, the control valve controls the leakage detection gas source, the first vacuum pump and the second vacuum pump to be communicated with and disconnected from the pipeline interface, the second vacuum pump is connected with the leakage detection gas recovery tank, the first vacuum pump is used for vacuumizing the power battery to be tested, and the second vacuum pump is used for recovering the leakage detection gas into the leakage detection gas recovery tank.

In summary, in the present invention, the operations of feeding, detecting and discharging can be automatically performed in a detection pipeline manner by the arrangement of the feeding conveying line, the detection conveying line, the sealing box 20, the closing mechanism, the gas detection sensor, the first gripper, the second gripper and the control unit; further, since in this embodiment, the first case and the second case form the seal case, through opening and closing the first case and the second case, and detecting the conveyance of the conveying line to the first case, the taking and placing operation of the power battery to be tested can be no longer required manually, and the seal case can be conveniently closed, and the power battery to be tested can be transmitted. Therefore, the high-performance power battery sealing performance testing system can automatically detect the sealing performance of the power battery to be tested. Further, by means of the arrangement of the compressing mechanism, the power battery to be tested can be automatically compressed; further, by setting the gas injection mechanism, the power battery to be tested can be automatically filled with the leakage detection gas.

The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention, as well as the preferred embodiments thereof, together with the following detailed description of the invention, given by way of illustration only, together with the accompanying drawings.

Drawings

Fig. 1 is a schematic axial structure diagram of a first view angle of a high performance power battery sealing performance test system according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of an axial structure of the high performance power battery sealing performance test system of fig. 1 at a second view angle.

Fig. 3 is a schematic top view of the high performance power cell sealing performance test system of fig. 1 with the cover plate and control panel removed.

Fig. 4 is a schematic top view of the sealing performance test system of the high performance power battery shown in fig. 3, with the air pump and the air storage tank removed.

Fig. 5 is a system block diagram of a high performance power cell sealability test system.

Fig. 6 is a schematic diagram showing the front view of the high performance power battery sealing performance test system in the first working position.

Fig. 7 is a schematic diagram showing the front view of the high performance power battery sealing performance test system in the second working position.

Fig. 8 is a schematic diagram showing the front view structure of the high-performance power battery sealing performance test system when the power battery sealing performance is detected.

Fig. 9 is a schematic front view of the sealing performance test system of the high-performance power battery in the third working position.

FIG. 10 is a schematic view showing the axial structure of the seal box, connecting rod and pipe joint.

Fig. 11 is a schematic view showing a shaft-side structure of the seal box in a closed state.

Fig. 12 is a schematic view showing a shaft-side structure of the seal box in an opened state.

Fig. 13 is a schematic diagram showing the front structure of the seal box.

FIG. 14 is a schematic cross-sectional view of the structure of FIG. 13 in the direction XIV-XIV.

Fig. 15 is an enlarged schematic view of the structure of fig. 14 at the circle.

Fig. 16 is a schematic view showing the axial structure of the first casing with the first pressing plate of the accommodating groove removed.

Fig. 17 is a schematic view showing the axial structure of the first casing with the second pressing plate removed.

Fig. 18 is a schematic top view of the seal box.

FIG. 19 is a schematic view showing a sectional structure in the direction XIX-XIX in FIG. 18.

Fig. 20 is an enlarged schematic view of the structure of fig. 19 at the circle.

Fig. 21 is a schematic view showing an axial structure of the gas injection mechanism at a first view angle.

Fig. 22 is a schematic view of an axial structure of the gas injection mechanism at a second view angle.

FIG. 23 is a schematic view showing the structure of the connecting pipe of the gas injection mechanism

Detailed Description

In order to further describe the technical means and effects adopted by the present invention to achieve the preset purpose, the following detailed description is given with reference to the accompanying drawings and preferred embodiments.

The invention provides a high-performance power battery sealing performance testing system which can automatically detect the sealing performance of a power battery.

Fig. 1 is a schematic diagram of an axial structure of a first view of a high-performance power battery sealing performance testing system according to an embodiment of the present invention, fig. 2 is a schematic diagram of an axial structure of a second view of the high-performance power battery sealing performance testing system shown in fig. 1, fig. 3 is a schematic diagram of a top view of the high-performance power battery sealing performance testing system shown in fig. 1, after a cover plate and a control panel are removed, fig. 4 is a schematic diagram of a top view of the high-performance power battery sealing performance testing system shown in fig. 3, after an air pump and an air storage tank are removed, and fig. 5 is a system block diagram of the high-performance power battery sealing performance testing system. As shown in fig. 1 to 5, the system for detecting the sealing performance of the power battery 60 to be detected provided by the embodiment of the invention includes a feeding conveying line 11, a detecting conveying line 12, a sealing box 20, a closing mechanism 30, a gas detecting sensor 41, a first gripper 51, a second gripper 52 and a control unit 42. The feeding conveying line 11 is used for conveying the power battery 60 to be tested. The sealing box 20 comprises a first box body 21, a second box body 22 and a vacuumizing device 23, wherein the first box body 21 is arranged on the detection conveying line 12 and moves along with the detection conveying line 12, and the second box body 22 corresponds to the position of the closing mechanism 30. When the detection conveyor line 12 conveys the first casing 21 to the second casing 22, the closing mechanism 30 closes the first casing 21 and the second casing 22 to form the sealed casing 20. The evacuation device 23 performs evacuation treatment for the seal box 20. The gas detection sensor 41 detects the concentration of a leak detection gas, such as helium, in the seal box 20. The first gripper 51 and the second gripper 52 are disposed in sequence along the upstream-downstream direction of the detection conveying line 12, and are movably disposed between the detection conveying line 12 and the loading conveying line 11 to pick and place the power battery 60 to be tested from the first box 21. The control unit 42 is electrically connected to the feeding conveyor line 11, the detection conveyor line 12, the evacuating device 23, the closing mechanism 30, the gas detection sensor 41, the first gripper 51 and the second gripper 52, so as to control the detection system.

Fig. 6 is a schematic front view of a sealing performance testing system of a high-performance power battery in a first working position, fig. 7 is a schematic front view of a sealing performance testing system of a high-performance power battery in a second working position, fig. 8 is a schematic front view of a sealing performance testing system of a high-performance power battery in a power battery sealing performance testing system to be tested, and fig. 9 is a schematic front view of a sealing performance testing system of a high-performance power battery in a third working position. As shown in fig. 6 to 9, when the sealing performance of the power battery 60 to be tested is detected by the high-performance power battery sealing performance testing system provided by the invention, the power battery 60 to be tested may be conveyed to the first gripper 51 through the feeding conveying line 11, the first gripper 51 is started, and the power battery 60 to be tested is placed in the first box 21 (as shown in fig. 6); then, the first casing 21 is moved to a position opposite to the second casing 22 by the detection conveyor line 12 (fig. 7), the closing mechanism 30 closes the first casing 21 and the second casing 22 to form a complete sealed casing 20 (fig. 8), and after a set time, the density of the leak-detecting gas in the sealed casing 20 is detected by the gas detection sensor 41; next, the closing mechanism 30 separates the first case 21 from the second case 22 again, the detection conveying line 12 conveys the first case 21 to the second gripper 52 (as shown in fig. 9), and the second gripper 52 grips the power battery 60 to be detected and places the power battery on the feeding conveying line 11 again to complete the detection.

Through the arrangement of the device, the operations of feeding, detecting and discharging can be automatically performed in a detection assembly line mode; further, since in the present embodiment, the first case 21 and the second case 22 form the sealing case 20, by opening and closing the first case 21 and the second case 22 and detecting the conveying of the conveying line 12 to the first case 21, the operation of taking and placing the power battery 60 to be tested can be performed without manual work, and the sealing case 20 can be conveniently closed and the power battery 60 to be tested can be transmitted. Therefore, the high-performance power battery sealing performance test system can automatically detect the sealing performance of the power battery 60 to be tested.

Referring to fig. 1 to 6, in the present embodiment, the high performance power battery sealing performance testing system further includes a support 13 and a control panel 14, and the detection conveying line 12, the second box 22, the closing mechanism 30, the gas detection sensor 41, the first gripper 51 and the second gripper 52 are all fixed on the support 13. The control panel 14 is electrically connected to the feeding conveyor line 11, the detecting conveyor line 12, the evacuating device 23, the closing mechanism 30, the gas detecting sensor 41, the first gripper 51 and the second gripper 52 to control the detecting system. A cover plate 15 is also provided outside the bracket 13 to protect the system.

FIG. 10 is a schematic view showing the axial structure of the seal box, connecting rod and pipe joint. With continued reference to fig. 3, 7, 8 and 10, in the present embodiment, the second box 22 is disposed above the first box 21, and when the detection conveyor line 12 conveys the first box 21 to the lower side of the second box 22, the closing mechanism 30 lifts the first box 21 to combine the first box 21 and the second box 22 into the sealed box 20.

More specifically, the closing mechanism 30 includes a lifting motor 31 disposed below the detection conveyor line 12, and a connecting rod 32 is further disposed on the second casing 22, and the second casing 22 is fixed to the support 13 of the detection system through the connecting rod 32.

With continued reference to fig. 3 and 4, the high performance power battery sealing performance testing system further includes a defective storage transmission line 16, the defective storage transmission line 16 and the loading transmission line 11 are respectively disposed at two sides of the detection transmission line 12, and the second gripper 52 moves among the defective storage transmission line 16, the detection transmission line 12 and the loading transmission line 11, so that after the detection is completed, the qualified product is sent from the first box 21 to the loading transmission line 11, and then the unqualified product is sent from the first box 21 to the defective storage transmission line 16.

Further, in order to improve the detection efficiency, the number of the detection conveyor lines 12 may be plural, in this embodiment, two, and the two conveyor lines are disposed in parallel and located between the defective storage conveyor line 16 and the feeding conveyor line 11.

With continued reference to fig. 3 and 10, a plurality of vacuum suction openings 221 are provided in the second casing 22 to suck air from the sealing box 20.

Fig. 11 is a schematic view of an axial structure of the seal box in a closed state, fig. 12 is a schematic view of an axial structure of the seal box in an open state, fig. 13 is a schematic view of a front view of the seal box, fig. 14 is a schematic view of a cross-sectional structure of the seal box in an XIV-XIV direction in fig. 13, and fig. 15 is an enlarged schematic view of a circle in fig. 14. As shown in fig. 11 to 15, in the present embodiment, in order to further improve the automation of the detection system, the seal box 20 further includes a pressing mechanism 24 and a receiving groove 25 for receiving the power battery 60 to be tested. The accommodating groove 25 is provided in the first housing 21, and a first pressing plate 251 that floats is provided in the accommodating groove 25. The pressing mechanism 24 is formed with a first state and a second state as the second casing 22 is closed or separated from the first casing 21. The second box 22 and the first box 21 are closed, so that the pressing mechanism 24 has a first state, and in the first state, the pressing mechanism 24 drives the first pressing plate 251 to reduce the volume of the accommodating groove 25 so as to clamp the power battery 60 to be tested; the second case 22 is separated from the first case 21 so that the pressing mechanism 24 has a second state in which the pressing mechanism 24 drives the first pressing plate 251 to increase the volume of the accommodating groove 25 to release the power battery 60 to be measured.

In the present embodiment, the pressing mechanism 24 is configured to control the first pressing plate 251 in linkage with the states of the second casing 22 and the first casing 21. When the second case 22 and the first case 21 are closed, the hold-down mechanism 24 can fix the holding groove 25 to the power battery 60 to be tested; when the second case 22 and the first case 21 are separated, the pressing mechanism 24 can make the accommodating groove 25 release the power battery 60 to be tested. Therefore, after the second case 22 and the first case 21 are closed, the fixing of the power battery 60 to be tested can be directly completed in the closing process, so as to prevent the expansion of the power battery 60 to be tested caused by the filling of the leakage gas. After the detection is finished, the second box 22 is separated from the first box 21, and the accommodating groove 25 can automatically loosen the fixing of the power battery 60 to be detected, so that the second gripper 52 can take out the power battery 60 to be detected.

Further, the first case 21 and the second case 22 form the sealing case 20, and the structure and the movement mode of the pressing mechanism 24 and the accommodating groove 25 can greatly reduce the volume of the sealing case 20, so as to reduce the time and energy consumption of the subsequent vacuum pumping and measure the concentration of the leakage gas.

Fig. 16 is a schematic view showing the axial structure of the first casing with the first pressing plate of the accommodating groove removed, and fig. 17 is a schematic view showing the axial structure of the first casing with the second pressing plate removed. With continued reference to fig. 11 to 17, the pressing mechanism 24 includes a pressing head 241, a second pressing plate 242 and a connecting post 243, and the pressing head 241 is fixed relative to the second housing 22. That is, the ram 241 may be fixed to the second casing 22 or to other parts fixed with respect to the second casing 22. The second pressing plate 242 is disposed on the first case 21, the connecting post 243 is movably disposed on the first case 21 along the axis direction thereof, one end of the connecting post 243 is connected to the first pressing plate 251, the other end is connected to the second pressing plate 242, the position of the pressing head 241 corresponds to the position of the second pressing plate 242, and when the second case 22 is closed with the first case 21, the pressing head 241 presses the second pressing plate 242, so that the connecting post 243 moves along the axis direction thereof toward the direction of the first pressing plate 251 to drive the first pressing plate 251 to clamp the power battery 60 to be tested.

More specifically, in the present embodiment, the second pressing plate 242 is located on the outer sidewall of the first casing 21, and the connection post 243 passes through the sidewall of the first casing 21 and is connected to the first pressing plate 251.

More specifically, with continued reference to fig. 17, the hold-down mechanism 24 further includes an elastic member 244 to assist in resetting the second pressure plate 242 after it is out of contact with the pressure head 241. Preferably, the elastic member 244 is disposed between the second pressing plate 242 and the outer sidewall of the first casing 21.

In order to ensure that the connecting post 243 moves along the axis direction of the connecting post 243 and also ensure the sealing performance of the sealing box 20, the pressing mechanism 24 further comprises a sleeve 245, a through hole 211 is arranged on the side wall of the first box body 21, the sleeve 245 is arranged in the through hole 211, and the connecting post 243 can be movably arranged in the sleeve 245 along the axis direction of the connecting post 243.

Further, as shown in fig. 14 and 15, a first sealing ring 2451 is sleeved on the sleeve 245, and when the pressing mechanism 24 is fixed in the through hole 211 of the first case 21, the first sealing ring 2451 is disposed between the outer side wall of the sleeve 245 and the inner side wall of the through hole 211.

At least two second sealing rings 2452 are further arranged between the connecting column 243 and the sleeve 245, a first oil duct 2453 is formed between the two second sealing rings 2452, and a second oil filling port 2454 communicated with the first oil duct 2453 is arranged on the sleeve 245. When the device is used, lubricating oil can be injected into the first oil duct 2453 through the second oil injection port 2454, so that the movement is ensured, and meanwhile, the sealing performance is considered.

Further, referring to fig. 11 and 12, in the present embodiment, the pressing head 241 includes a connecting plate 2411 and a roller 2412, one end of the connecting plate 2411 is connected to the outer sidewall of the second box 22, the other end extends toward the direction of the first box 21, and the roller 2412 is disposed on one end of the connecting plate 2411 away from the second box 22.

The number of the sleeves 245 and the connecting posts 243 may be plural, for example, two, and the second pressing plate 242 is connected between the ends of the connecting posts 243. A concave portion is formed at a position of the second pressing plate 242 corresponding to the roller 2412. When the second casing 22 is combined with the first casing 21, the roller 2412 extends into the recess to press the second pressing plate 242 to move toward the direction of the first pressing plate 251.

Further, in the present embodiment, the above-described driving device is provided only on the side wall of the accommodating groove 25 side, that is, only the first pressing plate 251 of the accommodating groove 25 side is in a floating state. In other embodiments, the driving device may also be disposed on a plurality of sidewalls of the accommodating groove 25.

Further, a first position sensor 26 for detecting the relative position between the second casing 22 and the first casing 21 is provided between the second casing 22 and the first casing 21. By the provision of the first position sensor 26, the closing or opening between the second casing 22 and the first casing 21 by the closing mechanism 30 can be facilitated.

In the present invention, the pressing mechanism 24 is provided to control the accommodating groove 25 to be linked with the states of the second casing 22 and the first casing 21. When the closing mechanism 30 closes the second case 22 and the first case 21, the holding mechanism 24 can fix the accommodating groove 25 to the power battery 60 to be tested; when the second case 22 and the first case 21 are separated, the pressing mechanism 24 can make the accommodating groove release the power battery 60 to be tested. Therefore, when the sealing performance of the power battery 60 to be tested is detected, the power battery 60 to be tested can be directly placed into the accommodating groove 25 through the first grip 51, and then the second box 22 and the first box 21 are closed, so that the effect that the accommodating groove 25 automatically fixes the power battery 60 to be tested is achieved; after the detection is completed, the second box 22 is separated from the first box 21, and the fixing mechanism can automatically loosen the fixing of the power battery 60 to be detected, so that the second gripper 52 can conveniently take out the power battery 60 to be detected.

Fig. 18 is a schematic top view of the seal box, fig. 19 is a schematic cross-sectional view of fig. 18 taken along the direction XIX-XIX, and fig. 20 is an enlarged schematic view of fig. 19 taken along a circle. As shown in fig. 18 to 20, the high performance power battery sealing performance test system according to the embodiment of the present invention further includes a gas injection mechanism 70 electrically connected to the control unit 42. The gas injection mechanism 70 includes a power source 71, a fixed pipe 72, a communicating pipe 73, and a leakage detection gas source 74 (see fig. 23), the fixed pipe 72 is fixed to the seal box 20, the communicating pipe 73 is reciprocatingly movably provided in the fixed pipe 72 in the axial direction thereof, the leakage detection gas source 74 communicates with the inside of the communicating pipe 73, the power source 71 is connected to the communicating pipe 73, and the communicating pipe 73 is driven to move in the fixed pipe 72, so that the communicating pipe 73 is formed in a state of being extended and contracted. In the extended state, the communication pipe 73 communicates with the leak detection gas injection port 61 of the power cell 60 to be measured; in the contracted state, the communication pipe 73 is out of contact with the leak detection gas injection port 61 of the power cell 60 to be measured.

In this embodiment, the power battery 60 to be tested is fixed; the power source 71 can drive the communicating pipe 73 to be in a stretched state, the end part of the communicating pipe 73 is connected with the leakage detection gas injection port 61 of the power battery 60 to be tested, the leakage detection gas source 74 is communicated with the leakage detection gas injection port 61 of the power battery 60 to be tested through the communicating pipe 73, and at the moment, the leakage detection gas can be filled into the power battery 60 to be tested through the leakage detection gas source 74. When the filled leakage-detecting gas reaches the required pressure, the power source 71 drives the communicating tube 73 to contract, so that the communicating tube 73 is separated from contact with the leakage-detecting gas injection port 61 of the power cell 60 to be tested.

In the whole detection process, the power battery 60 to be detected is firstly placed in the seal box 20, and then helium is injected, so that the detection step of the sealing performance is further simplified, the automation is improved, and the phenomenon of inaccurate detection results caused by leakage detection gas overflow in the transportation process of the power battery 60 to be detected is prevented.

In this embodiment, the power source 71 may be a telescopic cylinder, and in other embodiments, may be a motor.

Fig. 21 is a schematic view of an axial structure of a first view of the gas injection mechanism, and fig. 22 is a schematic view of an axial structure of a second view of the gas injection mechanism. As shown in fig. 20 to 22, in the present embodiment, the gas injection mechanism 70 further includes a fixing bracket 75, the fixing bracket 75 is fixed to the wall of the seal box 20, and the power source 71 and the fixing tube 72 are both disposed on the fixing bracket 75.

Preferably, the fixing bracket 75 is detachably provided on the wall of the sealed box 20, preferably the wall of the second box 22, to facilitate replacement of the gas injection mechanism 70. By replacing the gas injection mechanism 70, more models of power cells 60 to be tested are accommodated.

In order to achieve the above object, a clamping mechanism 27 (see fig. 11) is provided on the seal box 20 to clamp and fix the gas injection mechanism 70, preferably the fixing bracket 75. A permeation hole 28 is provided in the wall of the seal box 20, and a fixing pipe 72 extends from the permeation hole 28 into the seal box 20, and a clamping mechanism 27 detachably fixes the gas injection mechanism 70 to the wall of the seal box 20.

The fixing tube 72 is externally provided with a third seal ring 721, and when the gas injection mechanism 70 is fixed to the wall of the seal box 20, the third seal ring 721 is disposed between the outer wall of the fixing tube 72 and the inner wall of the permeation hole 28.

In order to facilitate the movement and sealing of the communication pipe 73 relative to the fixed pipe 72, at least two fourth sealing rings 722 are further provided between the communication pipe 73 and the fixed pipe 72, a second oil duct 723 is formed between the two fourth sealing rings 722, a second oil injection port 724 communicated with the second oil duct 723 is provided on the fixed pipe 72, and when in use, lubricating oil can be injected into the second oil duct 723 through the second oil injection port 724, so that the movement is ensured and the sealing performance is also considered.

Further, referring to fig. 20, a fifth sealing ring 62 is disposed on an end face of the communicating tube 73 facing one end of the power battery 60 to be tested, and when the communicating tube 73 is communicated with the helium gas injection port of the power battery 60 to be tested, the fifth sealing ring 62 is disposed between the communicating tube 73 and the power battery 60 to be tested, so as to ensure sealing therebetween.

With continued reference to fig. 21 to 22, a second position detector 76 is further provided on the gas injection mechanism 70, and the second position detector 76 may be fixed to the communication pipe 73 and move along with the communication pipe 73 to detect the length of the communication pipe 73 extending into the seal box 20.

Fig. 23 is a schematic view showing the structure of the connecting pipe of the gas injection mechanism. As shown in fig. 23, the communication pipe 73 is provided with a pipe port 731, and the gas injection mechanism 70 further includes a control valve 771, a first vacuum pump 742, a second vacuum pump 743, and a leak detection gas recovery tank 744. The leakage detection air source 74, the first vacuum pump 742 and the second vacuum pump 743 are all connected with the pipeline interface 731 through a control valve 771, and the control valve 771 controls the connection and disconnection of the leakage detection air source 74, the first vacuum pump 742 and the second vacuum pump 743 with the pipeline interface 731. A second vacuum pump 743 is connected to the leak detection gas recovery tank 744.

In the process of helium filling the power battery 60 to be tested, the first vacuum pump 742 may be connected to the pipeline interface 731 through the control valve 771, and the first vacuum pump 742 performs vacuum pumping on the power battery 60 to be tested to pump out the air in the power battery 60 to be tested; after the vacuumizing is finished, the leakage detection air source 74 is controlled to be communicated with the pipeline interface 731 through the control valve 771 so as to charge the leakage detection air into the power battery 60 to be measured; after the detection, the second vacuum pump 743 is connected to the pipeline port 731 through the control valve 771, and the leak detection gas in the power cell 60 to be detected is pumped out and stored in the helium recovery tank.

With continued reference to fig. 3, in this embodiment, the leak-detecting air source 74, the first vacuum pump 742, the second vacuum pump 743, the leak-detecting air recovery tank 744, and the vacuum pump for forming a vacuum to the seal box 20 may be disposed on the support 13 above the detection conveying line 12.

In summary, in the present invention, the operations of feeding, detecting and discharging can be automatically performed in a detection line manner by the arrangement of the feeding conveyor line 11, the detection conveyor line 12, the sealing box 20, the closing mechanism 30, the gas detection sensor 41, the first gripper 51, the second gripper 52 and the control unit 42; further, since in the present embodiment, the first case 21 and the second case 22 form the sealing case 20, by opening and closing the first case 21 and the second case 22 and detecting the conveying of the conveying line 12 to the first case 21, the operation of taking and placing the power battery 60 to be tested can be performed without manual work, and the sealing case 20 can be conveniently closed and the power battery 60 to be tested can be transmitted. Therefore, the high-performance power battery sealing performance test system can automatically detect the sealing performance of the power battery 60 to be tested. Further, by the arrangement of the compressing mechanism 24, the power battery 60 to be tested can be automatically compressed; further, by providing the gas injection mechanism 70, the power cell 60 to be tested can be automatically filled with the leak detection gas.

The present invention is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalent changes and variations in the above-mentioned embodiments can be made by those skilled in the art without departing from the scope of the present invention.

Claims (14)

1. A high-performance power battery sealing performance test system is characterized in that: including material loading conveying line, detection transfer line, seal box, closing mechanism, gas detection sensor, first tongs and second tongs, the material loading conveying line is used for the transmission of the power battery that awaits measuring, the seal box includes first box, second box and evacuating device, first box set up in on the detection conveying line to along with detecting the conveying line motion, the second box with closing mechanism's position is corresponding, works as the detection conveying line will first box conveys to when second box department, closing mechanism will first box with second box is closed in order to form the seal box, evacuating device does the seal box carries out the evacuation processing, gas detection sensor is right leak detection gas in the seal box detects, first tongs with the second tongs follow the upper and lower stream direction of detection conveying line sets gradually, and movably set up in between the detection conveying line with the material loading conveying line is with follow the first battery that awaits measuring in the first box takes the power battery that awaits measuring.

2. The high performance power cell sealing performance test system according to claim 1, wherein: the high-performance power battery sealing performance testing system further comprises a control unit, wherein the control unit is electrically connected with the feeding conveying line, the detection conveying line, the vacuumizing device, the closing mechanism, the gas detection sensor, the first handle and the second handle so as to control the high-performance power battery sealing performance testing system.

3. The high performance power cell sealing performance test system according to claim 1, wherein: the second box set up in the top of first box, closing mechanism including being located detect the conveyer line below lift motor, when detect the conveyer line with first box transport to the second box below, closing mechanism will first box lifts, in order will first box with the second box combination becomes the seal box.

4. The high performance power cell sealing performance test system according to claim 1, wherein: the high-performance power battery sealing performance testing system further comprises a defective product storage transmission line, the defective product storage transmission line and the feeding transmission line are respectively arranged on two sides of the detection transmission line, and the second gripper moves between the defective product storage transmission line and the detection transmission line and between the feeding transmission line.

5. The high performance power cell sealing performance test system according to claim 1, wherein: the sealed box further comprises a pressing mechanism and a containing groove for containing the power battery to be tested, wherein the containing groove is arranged in the first box body, a first floating pressing plate is arranged in the containing groove, the pressing mechanism is formed with a first state and a second state along with the closing or separating of the first box body and the second box body, the first box body and the second box body are closed, so that the pressing mechanism is in the first state, the pressing mechanism drives the first pressing plate to reduce the volume of the containing groove, the first box body is separated from the second box body, so that the pressing mechanism is in the second state, and the pressing mechanism drives the first pressing plate to increase the volume of the containing groove.

6. The high performance power cell sealing performance test system according to claim 5, wherein: the pressing mechanism comprises a pressing head, a second pressing plate and a connecting column, wherein the pressing head is arranged on the first box body, the second pressing plate is arranged on the second box body, the connecting column can be movably arranged on the second box body along the axis direction of the connecting column, one end of the connecting column is connected with the first pressing plate, the other end of the connecting column is connected with the second pressing plate, the position of the pressing head corresponds to the position of the second pressing plate, when the first box body is closed with the second box body, the pressing head presses the second pressing plate, so that the connecting column moves along the direction of the first pressing plate along the axis direction of the connecting column, and the first pressing plate is driven to clamp the power battery to be tested.

7. The high performance power cell sealing performance test system of claim 6, wherein: the driving mechanism further comprises an elastic piece, and the elastic piece is arranged between the second pressing plate and the second box body.

8. The high performance power cell sealing performance test system of claim 6, wherein: the driving mechanism further comprises a sleeve, a through hole is formed in the side wall of the second box body, the sleeve is arranged in the through hole, and the connecting column is movably arranged in the sleeve along the axis direction of the connecting column.

9. The high performance power cell sealing performance test system of claim 6, wherein: the pressure head comprises a connecting plate and a roller, one end of the connecting plate is connected with the outer side wall of the first box body, the other end of the connecting plate extends towards the direction where the second box body is located, and the roller is arranged at one end, away from the first box body, of the connecting plate.

10. The high performance power cell sealing performance test system according to claim 1, wherein: the high-performance power battery sealing performance testing system further comprises a gas injection mechanism, the gas injection mechanism comprises a power source, a fixed pipe, a communicating pipe and a leakage detection gas source, the fixed pipe is fixed on the sealing box, the communicating pipe can be arranged in the fixed pipe in a penetrating mode in a reciprocating mode along the axis direction of the communicating pipe, the leakage detection gas source is communicated with the inside of the communicating pipe, the power source is connected with the communicating pipe and drives the communicating pipe to move in the fixed pipe, so that the communicating pipe is in an extending state and a contracting state, the communicating pipe is communicated with a helium injection port of the power battery, and the communicating pipe is separated from contact with the helium injection port of the power battery in the contracting state.

11. The high performance power cell sealing performance test system of claim 10, wherein: the gas injection mechanism further comprises a fixing support, the fixing support is fixed on the wall of the sealing box, and the power source and the fixing pipe are arranged on the fixing support.

12. The high performance power cell sealing performance test system of claim 11, wherein: the sealing box is provided with a clamping mechanism capable of being loosened and tightened, and the fixing support is clamped in the clamping mechanism, so that the gas injection mechanism is detachably arranged on the sealing box.

13. The high performance power cell sealing performance test system of claim 10, wherein: the sealing box comprises a sealing box body, and is characterized in that a permeation hole is formed in the wall of the sealing box body, the fixing pipe stretches into the sealing box from the permeation hole, a third sealing ring is sleeved outside the fixing pipe, and the third sealing ring is arranged between the outer side wall of the fixing pipe and the inner side wall of the permeation hole.

14. The high performance power cell sealing performance test system of claim 10, wherein: the utility model discloses a power battery, including the gas injection mechanism, be provided with the pipeline interface on communicating pipe, gas injection mechanism still includes control valve, first vacuum pump, second vacuum pump and leak hunting gas recovery jar, leak hunting air source first vacuum pump and second vacuum pump all pass through the control valve with communicating pipe links to each other, the control valve control leak hunting air source first vacuum pump and second vacuum pump with the intercommunication and the disconnection of pipeline interface, the second vacuum pump with leak hunting gas recovery jar links to each other, first vacuum pump is used for the power battery evacuation that awaits measuring, the second vacuum pump is used for retrieving leak hunting gas in the leak hunting gas recovery jar.