A DCR test device

Abstract

The present invention provides a DCR test device, comprising: a frame; a feeding mechanism, provided with an escape space and erected in the frame; a lifting mechanism, arranged in the escape space; a testing mechanism, erected above the feeding mechanism; a code scanning mechanism, erected in the frame and used to scan the label information of the battery cell. The tray and the battery cell are transported to a predetermined position above the escape space of the feeding mechanism and are located below the testing mechanism. During the test, the testing mechanism does not move, and the lifting mechanism drives the tray and the battery cell to move upward and connect with the testing mechanism, so that during the contact between the testing mechanism and the battery cell on the tray, the power line will not swing at will, thereby not affecting the test result.

Description

[Technical field]

[0001] The invention relates to the technical field of lithium battery industry capacity testing, in particular to a DCR testing device. [Background technology]

[0002] During the production process of square battery cells, it is necessary to use battery cell capacity testing equipment to batch-type and activate the battery cells, that is, to load voltage and current between the positive and negative poles of the square battery cells. Only accurate and stable voltage and current can ensure that the internal activation of the battery cells is stable and sufficient, forming a stable and virtuous cycle of electrochemical reactions. In the battery cell capacity division process, that is, the battery cell capacity testing process, the capacity division equipment accurately controls and records the current and voltage values ​​that change with time during the charging and discharging process of the square battery cells. Only according to the current-voltage-time curve can the accurate battery cell capacity be tested.

[0003] In addition, the thermal stability detection and control of the battery cells during the high-current charging and discharging formation and testing process, that is, real-time temperature monitoring of the battery cell body, is an important parameter monitoring to ensure the safe and stable production of the battery cells. At the same time, the formation and capacity testing machine monitors and controls the temperature of the battery cells to ensure that the battery cells are tested at the set temperature, which not only ensures the safe monitoring of the battery production process, but also ensures the accuracy of the parameter testing of the battery performance.

[0004] Temperature has a significant impact on the testing of battery cell performance parameters. To a certain extent, the performance of the battery cell determines the performance of the battery module and thus affects the performance of the entire power battery system. Therefore, it is crucial to accurately test the charging and discharging parameters of the battery cell during the composition test, which is related to the life and safety of the battery system.

[0005] The defects of existing DCR test equipment are mainly manifested in:

[0006] 1. The current structure of the chemical component capacity DCR test equipment is that the needle bed moves forward and backward or up and down, and the tray is relatively stationary. Because the power line of the needle bed is too heavy and too long, the power line bends during the test, affecting the impedance and thus affecting the test results;

[0007] 2. The needle bed full tray test, that is, testing a tray of battery cells at one time, one battery cell corresponds to a power supply test, resulting in more power supply chassis, larger size of the whole machine, and higher cost.

[0008] 3. Full disk test: if you want to reduce the number of power supply chassis, you need to use relays for switching, and the relay impedance will affect the test results. [Summary of the invention]

[0009] The technical problem to be solved by the present invention is to provide a DCR test device, in which the needle bed is stationary and the tray is driven to move by a lifting mechanism to ensure that the power line will not swing arbitrarily during the contact between the test mechanism and the battery cell on the tray, thereby not affecting the test result.

[0010] The present invention is implemented as follows: a DCR test device, comprising:

[0011] frame;

[0012] The feeding mechanism is provided with an escape space and is erected in the frame;

[0013] A lifting mechanism is arranged in the avoidance space;

[0014] A testing mechanism, mounted above the feeding mechanism;

[0015] The code scanning mechanism is set up in the frame and is used to scan the information of the label of the battery cell.

[0016] Furthermore, the feeding mechanism comprises:

[0017] A first roller conveyor line is fixed in the frame;

[0018] The second roller conveyor line is fixed in the frame and is symmetrically distributed with the first roller conveyor line, and is arranged at intervals with the first roller conveyor line to form the avoidance space;

[0019] A first detection device, used to detect that the tray and the battery cell have reached a predetermined deceleration position;

[0020] a second detection device;

[0021] Wherein, the first detection device and the second detection device are also used to simultaneously detect whether the tray and the battery cell stop at a preset position.

[0022] Furthermore, the lifting mechanism comprises:

[0023] A horizontal slide table is horizontally slidably connected to the frame and is located in the avoidance space;

[0024] A cylinder, fixedly connected to the horizontal slide, and a piston rod fixedly connected to the frame;

[0025] A lifting platform is vertically slidably connected to the horizontal slide;

[0026] The lifting drive component is fixed to the horizontal slide, and the output end is fixedly connected to the lifting platform.

[0027] Furthermore, the lifting drive assembly comprises:

[0028] A motor, fixedly connected to the horizontal slide;

[0029] A reducer, the input end of which is fixedly connected to the output end of the motor;

[0030] A screw rod is rotatably connected to the horizontal slide, arranged vertically, and fixedly connected to the output end of the reducer;

[0031] A nut is connected to the screw rod and fixedly connected to the lifting platform.

[0032] Furthermore, the testing mechanism comprises:

[0033] A support frame, fixedly connected to the frame;

[0034] The probe group has a plurality of rows and an even number, and is connected to the support frame in a sliding manner left and right and front and back;

[0035] A temperature detection device connected to the support frame;

[0036] The fan group is fixedly connected to the support frame and is located above each of the probe groups.

[0037] Furthermore, it also includes:

[0038] There are two first guide rails, which are fixedly connected to the support frame in parallel and arranged in the left-right direction;

[0039] There are eight first sliders, which are slidably connected to the first guide rails, and four first sliders are arranged on each first guide rail;

[0040] There are eight second sliders, which are fixedly connected to the first sliders in a one-to-one correspondence;

[0041] The second guide rails are equal in number to the probe groups, and are fixedly connected to the probe groups in a one-to-one correspondence, and each second guide rail is slidably connected to two second sliders and arranged in the front-to-back direction; wherein the probe groups have four rows;

[0042] There are two connecting rods, one of which is fixedly connected to the probe groups in the first and third rows, and the other is fixedly connected to the probe groups in the second and fourth rows.

[0043] Furthermore, it also includes:

[0044] a rack, one of which is fixedly connected to the support frame and parallel to the first guide rail;

[0045] There are two toothed plates, which are meshed with the racks and are respectively and vertically movably connected to the probe groups.

[0046] Furthermore, the code scanning mechanism includes:

[0047] A support column, fixedly connected to the frame;

[0048] A first adjustment shaft, movably connected to the support column;

[0049] A second adjustment shaft, movably connected to the first adjustment shaft and perpendicular to the first adjustment shaft;

[0050] The code scanning device is fixedly connected to the second adjusting shaft.

[0051] Further, the first adjustment shaft is fixedly connected to the support column via a first fixing clamp;

[0052] The second adjusting shaft is fixedly connected to the first adjusting shaft via a second fixing clamp.

[0053] The advantages of the present invention are: a DCR test device, comprising: a frame; a feeding mechanism, provided with an escape space and erected in the frame; a lifting mechanism, arranged in the escape space; a testing mechanism, erected above the feeding mechanism; a code scanning mechanism, erected in the frame and used to scan the label information of the battery cell. The tray and the battery cell are transported to a predetermined position above the escape space of the feeding mechanism and are located below the testing mechanism. During the test, the testing mechanism does not move, and the lifting mechanism drives the tray and the battery cell to move upward and connect with the testing mechanism, so that during the contact between the testing mechanism and the battery cell on the tray, the power line will not swing at will, thereby not affecting the test results.

Brief Description of the Drawings

[0054] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0055] Figure 1 It is a three-dimensional diagram of a DCR testing device of the present invention.

[0056] Figure 2 It is a rear view of a DCR testing device of the present invention.

[0057] Figure 3 The internal structure of a DCR test device of the present invention is shown in FIG. Figure 1 .

[0058] Figure 4 The internal structure of a DCR test device of the present invention is shown in FIG. Figure 2 .

[0059] Figure 5 The internal structure of a DCR test device of the present invention is shown in FIG. Figure 3 .

[0060] Figure 6 It is a three-dimensional structure of the lifting mechanism of the present invention. Figure 1 .

[0061] Figure 7 It is a three-dimensional structure of the lifting mechanism of the present invention. Figure 2 .

[0062] Figure 8 It is a three-dimensional view of the feeding mechanism of the present invention.

[0063] Fig. 9 It is a three-dimensional diagram of the code scanning mechanism of the present invention.

[0064] Fig.10 It is a three-dimensional diagram of the testing mechanism of the present invention.

[0065] Fig.11 It is an exploded view of the testing mechanism of the present invention.

[0066] Fig.12 It is a front view of the testing mechanism of the present invention.

[0067] Description of reference numerals:

[0068] Frame 1, horizontal support plate 11, second avoidance opening 111, inlet and outlet 12, first photoelectric beam sensor 13, second photoelectric beam sensor 14;

[0069] Feeding mechanism 2, avoidance space 21, first roller conveyor line 22, unpowered roller 221, electric roller 222, roller support sheet metal 223, multi-V belt 224, tensioning shaft 225, deep groove ball bearing 226, sensor fixing plate 227, second roller conveyor line 23, first detection device 24, second detection device 25;

[0070] Lifting mechanism 3, horizontal slide 31, lifting platform 32, lifting drive assembly 33, third guide rail 34;

[0071] Testing mechanism 4, support frame 41, probe group 42, temperature detection device 43, guide bar 45, first guide rail 46, first slider 47, second slider 48, second guide rail 49, connecting rod 410, rack 420, toothed plate 430;

[0072] Code scanning mechanism 5, support column 51, first adjustment shaft 52, second adjustment shaft 53, code scanning device 54, first fixing clamp 55, second fixing clamp 56;

[0073] Battery cell 100;

[0074] Tray 200. [Specific implementation method]

[0075] In the description of the present invention, it is necessary to understand that the description indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is 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 limiting the scope of protection of the present invention.

[0076] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] The overall concept of the present invention is as follows:

[0078] The tray 200 and the battery cell 100 are transported to a predetermined position above the avoidance space 21 of the feeding mechanism 2 and are located below the testing mechanism 4. During the test, the testing mechanism 4 does not move, and the lifting mechanism 3 drives the tray 200 and the battery cell 100 to move upward and connect with the testing mechanism 4, so that when the testing mechanism 4 contacts the battery cell 100 on the tray 200, the power line of the testing mechanism 4 will not swing at will, thereby not affecting the test results.

[0079] See also Figures 1 to 12 shown.

[0080] A DCR test device, comprising:

[0081] Rack 1; in a specific embodiment, the rear side of the rack 1 is further provided with an inlet and outlet 12 to allow the battery cell 100 and the tray 200 to enter and exit the feeding mechanism 2; a first photoelectric corresponding sensor 13 is provided at the inlet and outlet 12 to detect whether the tray 200 and the battery cell 100 enter from the inlet and outlet 12, so as to feedback a signal to the PLC, and the PLC notifies the feeding mechanism 2 to work and transport the tray and the battery cell to a predetermined test position for testing, and a second photoelectric corresponding sensor 14 is provided to detect whether the predetermined test position is reached, so as to feedback a signal to the PLC, and the PLC controls the feeding mechanism 2 to stop working; wherein Figures 2 to 7 The first photoelectric beam sensor 13 and the second photoelectric beam sensor 14 are in a disassembled state;

[0082] The feeding mechanism 2 is provided with an escape space 21 and is mounted in the frame 1;

[0083] A lifting mechanism 3 is arranged in the avoidance space 21;

[0084] A testing mechanism 4 is mounted above the feeding mechanism 2;

[0085] The code scanning mechanism 5 is installed in the frame 1 and is used to scan the information of the label of the battery cell 100 .

[0086] The feeding mechanism 2 comprises:

[0087] The first roller conveyor line 22 is fixed in the frame 1;

[0088] The second roller conveyor line 23 is fixed in the frame 1 and is symmetrically distributed with the first roller conveyor line 22, and is arranged at intervals with the first roller conveyor line 22 to form the avoidance space 21;

[0089] The first detection device 24 is used to detect that the tray 200 and the battery cell 100 have reached a predetermined deceleration position;

[0090] A second detection device 25;

[0091] The first detection device 24 and the second detection device 25 are also used to detect whether the tray 200 and the battery cell 100 are stopped at a preset position.

[0092] In a specific embodiment: the first roller conveyor line 22 and the second roller conveyor line 23 are symmetrical structures. It can be preset that the roller conveyor line and the production conveyor line are docked at the inlet and outlet 12, and the tray 200 and the battery cell 100 are from the production conveyor line. If the roller conveyor line rotates forward, the tray 200 and the battery cell 100 enter from the inlet and outlet 12 and are transported to the test mechanism 4 for testing. After the test is completed, it is reversed and the tray 200 and the battery cell 100 are transported from the inlet and outlet 12 to the outside of the DCR test equipment and returned to the production conveyor line.

[0093] The first roller conveyor line 22 includes an unpowered roller 221, an electric roller 222, a roller support sheet metal 223, a multi-V belt 224, a tensioning shaft 225, a deep groove ball bearing 226 and a sensor fixing plate 227. For example, the electric roller 222 can be driven by a motor to rotate as a power roller. The first detection device 24 and the second detection device 25 both use photoelectric counter-radiation sensors fixed on the sensor fixing plate 227.

[0094] In order to prevent the electric roller 222 from interfering with the lifting mechanism 3, the feeding mechanism 2 is composed of two groups, namely, the first roller conveyor line 22 and the second roller conveyor line 23, which are symmetrically arranged.

[0095] The electric roller 222 is placed at the feeding place, and the multi-V belt 224 drives the electric roller 222 to drive the unpowered roller 221, so that the roller conveys the pallet 200 to the predetermined position above the avoidance space 21. When the first detection device 24 detects the pallet 200, the electric roller 222 slows down and stops, and the first detection device 24 and the second detection device 25 jointly detect whether the pallet stops at the predetermined position. Guide strips can be added on both sides of the test mechanism to play a guiding and limiting role in the process of roller transporting the pallet. A tensioning structure is added under the multi-V belt 224, and the deep groove ball bearing 226 on the tensioning shaft 225 presses the multi-V belt 224 to increase the tension of the multi-V belt 224. If the multi-V belt 224 is loose for a long time, the tensioning structure can be adjusted again so that the multi-V belt can be used multiple times without frequent replacement of the multi-V belt 224.

[0096] The lifting mechanism 3 comprises:

[0097] A horizontal slide 31 is horizontally slidably connected to the frame 1 and is located in the avoidance space 21; in a specific embodiment, the frame 1 is provided with a horizontal support plate 11, and the horizontal support plate 11 is provided with a second avoidance opening 111 for accommodating and avoiding the lifting drive assembly 33; a third slider (not shown) is provided at the bottom of the horizontal slide 31, and the third slider is slidably connected to the third guide rail 34, and the third guide rail 34 is fixed to the horizontal support plate 11, and the third guide rail 34 is parallel to the conveying direction of the feeding mechanism 2, that is, arranged along the front-to-back direction; wherein the feeding mechanism 2 is mounted on the horizontal support plate 11;

[0098] The cylinder (not shown) is fixedly connected to the horizontal slide 31, and the piston rod is fixedly connected to the frame 1; in a specific embodiment, the cylinder (not shown) is fixed to the bottom surface of the horizontal slide 31, the piston rod is fixed to the horizontal support plate 11, and the piston rod is parallel to the third guide rail 34.

[0099] The lifting platform 32 is vertically slidably connected to the horizontal slide 31; in a specific embodiment, a plurality of limit members 321 and positioning pins 322 are provided on the top of the lifting platform 32; wherein each limit member 321 encloses a battery cell accommodating cavity for placing the battery cell 100; and the positioning pins 322 are used to perform positioning cooperation with the positioning holes (not shown) at the bottom of the tray 200, and the number and position of the positioning pins 322 can be set according to the number of positioning holes at the bottom of the tray 200. In the embodiment shown in the drawings, there are four limit members 321 and four positioning pins 322, which are arranged in a rectangular shape;

[0100] The lifting drive assembly 33 is fixed to the horizontal slide 31 , and an output end thereof is fixedly connected to the lifting platform 32 .

[0101] The lifting drive assembly 33 includes:

[0102] A motor, fixedly connected to the horizontal slide 31;

[0103] A reducer, the input end of which is fixedly connected to the output end of the motor;

[0104] A screw rod is rotatably connected to the horizontal slide 31, arranged vertically, and fixedly connected to the output end of the reducer;

[0105] The nut is connected to the screw rod and fixedly connected to the lifting platform 32 .

[0106] The lifting mechanism 3 is responsible for lifting and lowering the tray 200 and moving it forward and backward. The front and rear positions are driven by the cylinder 33. The lifting adopts the structure of a motor, a reducer and a screw nut pair. In the specific implementation, the lifting component 33 can directly adopt a servo electric cylinder. The servo electric cylinder is a modular product that integrates a servo motor and a screw.

[0107] The adjustment of the front and rear positions allows the half tray test to be used during the test, that is, half of the number of cells 100 on the tray 200 is tested each time, and after testing half, the front and rear positions are adjusted to test the other side, which can simplify the size of the entire device and reduce the floor space. For example, there are several rows of cells 100 on the tray 200, the initial position tests the cells 100 in the odd-numbered rows, and the last position tests the cells 100 in the even-numbered rows. After the test is completed, the feeding mechanism 2 transports the tray 200 away.

[0108] The working principle of the lifting mechanism 3 is as follows: the motor drives the reducer to work, driving the screw to rotate, so that the nut moves linearly in the vertical direction along the screw, and then drives the lifting platform 32 to lift and lower, and lift the battery cell at the predetermined position when lifting, wherein during the lifting process, the battery cell 100 and the positioning pin 322 are positioned, and the battery cell 100 is located in the battery cell accommodating cavity surrounded by the limit members 321; after being lifted into place, the battery cell 100 and the probe group 42 above are in contact and conductive, so as to carry out the test; at this time, the test of half of the battery cells is completed, and the battery cell 100 is connected to the probe group 42 above. The motor works to lower the lifting platform 32 to the predetermined position, and the battery cells and the probes are separated. Then the cylinder (not shown) works to drive the horizontal slide 31 to move in the front-to-back direction, adjust the positions of the battery cells, and adjust the untested battery cells on the other side to correspond one to one with the probe group 42. Then the motor works to lift the lifting platform 32 again, and the battery cells are raised to contact and conduct with the probe group 42 for testing. At this time, the testing of a tray of battery cells is completed, and the motor works to lower and reset the lifting platform 32, and the tray 200 falls back on the feeding mechanism 2 and is finally transported away.

[0109] The testing mechanism 4 comprises:

[0110] A support frame 41, fixedly connected to the frame 1;

[0111] The probe group 42 has several rows and is an even number, and is connected to the support frame 41 by sliding left and right and front and back; each of the probe groups 42 includes several probes arranged at equal intervals. In a specific embodiment, the interval between adjacent probes is equal to the thickness of a battery cell, that is, only half of the battery cells are tested each time, and the whole battery cell is tested twice. For example, in the first test: the battery cells at odd positions 1, 3, 5, 7... are tested, and then the positions of the battery cells are adjusted, and the battery cells at even positions 2, 4, 6, 8... are adjusted to correspond to the probes one by one, and the second test is performed. The order of odd numbers and even numbers can be swapped and can be pre-set as needed;

[0112] The temperature detection device 43 is connected to the support frame 41 ; the temperature detection device 43 is used to monitor the ambient temperature inside the DCR test equipment in real time to prevent the ambient temperature from being too high and affecting the test.

[0113] The fan group 44 is fixedly connected to the support frame 41 and is located above each of the probe groups 42 .

[0114] In a specific embodiment, guide bars 45 are provided on both sides of the support frame 41. The guide bars 45 are parallel to the conveying direction of the feeding mechanism 2 and are located on both sides of the battery cell. They play a guiding and limiting role in the process of transporting the tray 200 and the battery cell 100 by the roller conveyor line. In order to prevent friction loss of the tray 200, the material is selected to be a non-metallic wear-resistant material.

[0115] Also includes:

[0116] There are two first guide rails 46, which are parallel and fixedly connected to the support frame 41 and arranged in the left-right direction;

[0117] There are eight first sliders 47, which are slidably connected to the first guide rails 46, and four first sliders 47 are arranged on each first guide rail 46;

[0118] There are eight second sliders 48, which are fixedly connected to the first sliders 47 one by one;

[0119] The second guide rails 49 are equal in number to the probe groups 42 and are fixedly connected to the probe groups 42 in a one-to-one correspondence. Each second guide rail 49 is slidably connected to two second sliders 48 and arranged in the front-to-back direction. The probe groups 42 have four rows.

[0120] There are two connecting rods 410 , one of which is fixedly connected to the probe groups 42 in the first and third rows, and the other of which is fixedly connected to the probe groups 42 in the second and fourth rows.

[0121] Also includes:

[0122] A rack 420, having one piece, fixedly connected to the support frame 41 and parallel to the first guide rail 46;

[0123] There are two toothed plates 430, which mesh with the rack 420 and are respectively and vertically movably connected to the probe group 42. In a specific implementation, a vertical shaft (not shown) can be set at the bottom of the toothed plate 430, and a perforation (not shown) can be opened at the corresponding position of the probe group 42. The perforation and the vertical shaft are matched with each other. When the position needs to be adjusted, the toothed plate 430 can be directly pulled up, and then the probe group 42 can be moved. After the position is adjusted, the toothed plate 430 can be pressed down to mesh with the rack 420. Of course, in other embodiments, a spring can also be set on the vertical shaft, and a downward pre-tightening force can be applied to the toothed plate 430 by the spring, so that it can automatically rebound and mesh with the rack 420.

[0124] It should be noted that the probe group 42 is fixed during testing, and slides in two directions. One is to adjust the spacing of the probe group 42 to meet the testing requirements of cells with different pole spacings; the other is to facilitate the replacement and maintenance of the probe group.

[0125] The testing mechanism 4 is compatible with the use requirements of cells with different pole spacings, so the second guide rail 49 and the second slider 48 can be used to adjust the spacing of the probe group 42 .

[0126] The first guide rail 46 and the first slide block 47 allow the probe set 42 to be pulled out from the support frame 41 for easy replacement and maintenance.

[0127] The toothed plate 430 and the rack 420 are meshed to limit and fix the second guide rail 49 and the second slider 48 to avoid sliding during testing.

[0128] During the test, the power lines and probes carrying current will generate heat. If this heat is not handled in time, it will affect the test results. Even the excessive temperature will affect the internal structure of the battery cell 100, thereby causing safety accidents such as battery cell combustion and explosion. Therefore, the fan unit 44 is added to remove the generated heat in time to ensure the normal progress of the test.

[0129] The temperature detection device 43 may adopt a temperature sensor to monitor the ambient temperature in real time to prevent the ambient temperature from being too high and affecting the test.

[0130] The code scanning mechanism 5 comprises:

[0131] A support column 51, fixedly connected to the frame 1;

[0132] A first adjustment shaft 52, movably connected to the support column 51;

[0133] A second adjustment shaft 53 is movably connected to the first adjustment shaft 52 and is perpendicular to the first adjustment shaft 52;

[0134] The code scanning device 54 is fixedly connected to the second adjusting shaft 53 .

[0135] The first adjustment shaft 52 is fixedly connected to the support column 51 through a first fixing clamp 55;

[0136] The second adjusting shaft 53 is fixedly connected to the first adjusting shaft 52 via a second fixing clamp 56 .

[0137] In a specific embodiment, the first fixing clamp 55 and the second fixing clamp 56 can be pillar fixing clamps.

[0138] The support column 51, the adjustment shaft and the fixing clamp cooperate to realize the position adjustment of the manual code scanning device 54 to meet the requirements of different label positions. After the code scanning device 54 scans the label, it can be transmitted to the host computer and interact with the MES system, and the voltage, current, impedance, temperature and other data of the test process can be recorded in association with the battery cell.

[0139] Specific usage:

[0140] The roller conveyor line and the production conveyor line are connected at the inlet and outlet 12, and the tray 200 and the battery cell 100 are conveyed by the production conveyor line;

[0141] The first photoelectric sensor 13, the second photoelectric sensor 14, the electric roller 222, the first detection device 24, the second detection device 25, the cylinder (not shown), the lifting drive assembly 33, the temperature detection device 43, and the code scanning device 54 are respectively connected to the control system of the production line, such as the PLC, for unified control;

[0142] Each probe of the probe group 42 is connected to the test equipment respectively, and the test equipment can also be connected to the PLC for communication; the distance between adjacent probes on each probe group 42 is equal to the thickness of a battery cell;

[0143] Set up working procedures.

[0144] ① The production conveyor line transports the tray 200 and the battery cell 100 to the entrance and exit 12. After the first photoelectric sensor 13 detects it, it feeds back the signal to the PLC;

[0145] ②PLC controls the electric roller 222 to be transported to the predetermined test position. After being detected by the second photoelectric sensor 14, a signal is fed back to the PLC; after the barcode scanning device 54 scans the label of the battery cell 100, it can be transmitted to the host computer and interact with the MES system, and the voltage, current, impedance, temperature and other data of the test process are recorded in association with the battery cell;

[0146] ③PLC controls the electric roller 222 to stop working;

[0147] ④ Then the PLC controls the lifting drive assembly 33 to work, lifts the lifting platform 32, and the positioning pins and the positioning holes at the bottom of the tray 200 complete the positioning, and the battery cell 100 and the tray 200 are located in the battery cell accommodating cavity; after lifting into place, the probes of the probe group 42 correspond one by one to the electrodes of the battery cells 100 at odd positions to contact and conduct;

[0148] ⑤Then the test equipment automatically tests the battery cell and sends the test results to the PLC after completion. The PLC can store the test results or send them to the host computer. This can be pre-set according to actual needs;

[0149] ⑥ After the test of the odd-numbered cells is completed at the same time, the test equipment feeds back a signal to the PLC; the PLC controls the lifting drive assembly 33 to work, lowers the lifting platform 32 to the preset adjustment position, and the cell 100 is separated from the probe;

[0150] ⑦PLC controls the cylinder (not shown) to work, driving the horizontal slide 31 to move to a predetermined position in the front-to-back direction, adjusting the cells at the even-numbered positions to the predetermined test positions, corresponding one-to-one with the probes;

[0151] ⑧ Then the PLC controls the lifting drive assembly 33 to work, lifts the lifting platform 32, and the positioning pins and the positioning holes at the bottom of the tray 200 complete the positioning, and the battery cell 100 and the tray 200 are located in the battery cell accommodating cavity; after lifting into place, the probes of the probe group 42 correspond one by one to the electrodes of the battery cells 100 at the even-numbered positions to contact and conduct;

[0152] ⑨Then the test equipment automatically tests the battery cell and sends the test results to the PLC after completion. The PLC can store the test results or send them to the host computer and save them together with the test data of the odd-numbered positions;

[0153] ⑩ After the test is completed, the test equipment feeds back a signal to the PLC; the PLC controls the lifting drive assembly 33 to work, lowers the lifting platform 32 to reset, separates the battery cell 100 from the probe, and the tray 200 falls back on the roller conveyor line;

[0154] (11) After the lifting platform 32 is reset, the PLC controls the electric roller 222 to rotate in the opposite direction, transporting the tray 200 and the battery cell 100 out from the inlet and outlet 12, thus completing a test.

[0155] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A DCR test device, Features: include: frame; The feeding mechanism is provided with an escape space and is erected in the frame; A lifting mechanism is arranged in the avoidance space; A testing mechanism, mounted above the feeding mechanism; A code scanning mechanism is installed in the frame and is used to scan the information on the label of the battery cell; The testing method of the testing device comprises the following steps: (1) The production conveyor line transports the trays and cells to the import and export ports. After the first photoelectric sensor detects them, it feeds back the signal to the PLC. (2) The PLC controls the electric roller to be transported to the predetermined test position. After being detected by the second photoelectric sensor, the signal is fed back to the PLC. After the barcode scanning device scans the label of the battery cell, it is transmitted to the host computer and interacts with the MES system, and the data of voltage, current, impedance, and temperature during the test process are recorded in association with the battery cell. (3) PLC controls the electric drum to stop working; (4) Then the PLC controls the lifting drive assembly to lift the lifting platform, and the positioning pins and the positioning holes at the bottom of the tray complete the positioning, so that the battery cells and the tray are located in the battery cell accommodating cavity; after the lifting is in place, the probes of the probe group correspond one by one to the electrodes of the battery cells at the odd positions and contact and conduct; (5) The test equipment then automatically tests the battery cell and sends the test results to the PLC after completion. The PLC stores the test results or sends them to the host computer; (6) After the test of the odd-numbered cells is completed at the same time, the test equipment feeds back a signal to the PLC; the PLC controls the lifting drive assembly to lower the lifting platform to the preset adjustment position, and the cell and the probe are separated; (7) The PLC controls the cylinder to drive the horizontal slide table to move to the predetermined position in the front-to-back direction, and adjusts the cells at the even-numbered positions to the predetermined test positions, corresponding one-to-one with the probes; (8) Then the PLC controls the lifting drive assembly to lift the lifting platform, and the positioning pins and the positioning holes at the bottom of the tray complete the positioning, so that the battery cell and the tray are located in the battery cell accommodating cavity; after the lifting is in place, the probes of the probe group correspond one by one to the electrodes of the battery cells at the even-numbered positions and are in contact and conductive; (9) The test equipment then automatically tests the battery cell and sends the test results to the PLC after completion. The PLC stores the test results or sends them to the host computer and saves them together with the test data of the odd-numbered positions; (10) After the test is completed, the test equipment feeds back a signal to the PLC; the PLC controls the lifting drive assembly to lower the lifting platform and reset it, the battery cell and the probe are separated, and the tray falls back on the roller conveyor line; (11) After the lifting platform is reset, the PLC controls the electric roller to rotate in the opposite direction, transporting the tray and battery cells out from the inlet and outlet to complete a test.

2. A DCR test device as claimed in claim 1, Features: The feeding mechanism comprises: A first roller conveyor line is fixed in the frame; The second roller conveyor line is fixed in the frame and is symmetrically distributed with the first roller conveyor line, and is arranged at intervals with the first roller conveyor line to form the avoidance space; A first detection device, used to detect that the tray and the battery cell have reached a predetermined deceleration position; a second detection device; Wherein, the first detection device and the second detection device are also used to simultaneously detect whether the tray and the battery cell stop at a preset position.

3. A DCR test device as claimed in claim 1, Features: The lifting mechanism comprises: A horizontal slide table is horizontally slidably connected to the frame and is located in the avoidance space; A cylinder, fixedly connected to the horizontal slide, and a piston rod fixedly connected to the frame; A lifting platform is vertically slidably connected to the horizontal slide; The lifting drive component is fixed to the horizontal slide, and the output end is fixedly connected to the lifting platform.

4. A DCR test device as claimed in claim 3, Features: The lifting drive assembly comprises: A motor, fixedly connected to the horizontal slide; A reducer, the input end of which is fixedly connected to the output end of the motor; A screw rod is rotatably connected to the horizontal slide, arranged vertically, and fixedly connected to the output end of the reducer; A nut is connected to the screw rod and fixedly connected to the lifting platform.

5. A DCR test device as claimed in claim 1, Features: The testing organization includes: A support frame, fixedly connected to the frame; The probe group has a plurality of rows and an even number, and is connected to the support frame in a sliding manner left and right and front and back; A temperature detection device connected to the support frame; The fan group is fixedly connected to the support frame and is located above each of the probe groups.

6. A DCR test device as claimed in claim 5, Features: Also includes: There are two first guide rails, which are fixedly connected to the support frame in parallel and arranged in the left-right direction; There are eight first sliders, which are slidably connected to the first guide rails, and four first sliders are arranged on each first guide rail; There are eight second sliders, which are fixedly connected to the first sliders in a one-to-one correspondence; The second guide rails are equal in number to the probe groups, and are fixedly connected to the probe groups in a one-to-one correspondence, and each second guide rail is slidably connected to two second sliders and arranged in the front-to-back direction; wherein the probe groups have four rows; There are two connecting rods, one of which is fixedly connected to the probe groups in the first and third rows, and the other is fixedly connected to the probe groups in the second and fourth rows.

7. A DCR test device as claimed in claim 6, Features: Also includes: a rack, one of which is fixedly connected to the support frame and parallel to the first guide rail; There are two toothed plates, which are meshed with the racks and are respectively and vertically movably connected to the probe groups.

8. A DCR test device as claimed in claim 1, Features: The code scanning mechanism comprises: A support column, fixedly connected to the frame; A first adjustment shaft, movably connected to the support column; A second adjustment shaft, movably connected to the first adjustment shaft and perpendicular to the first adjustment shaft; The code scanning device is fixedly connected to the second adjusting shaft.

9. A DCR test device as claimed in claim 8, Features: The first adjustment shaft is fixedly connected to the support column via a first fixing clamp; The second adjusting shaft is fixedly connected to the first adjusting shaft via a second fixing clamp.

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