Voltage and internal resistance testing equipment for multi-model lithium batteries

Abstract

The utility model relates to the technical field of battery module manufacturing, and discloses a multi-model lithium battery voltage internal resistance testing device, which comprises an electrical integrated cabinet and an internal resistance testing mechanism, and is characterized in that the electrical integrated cabinet comprises a cabinet body, a workbench arranged on the cabinet body, a transmission mechanism and an internal resistance tester; the internal resistance testing mechanism comprises an X-axis module, a Y-axis module and a Z-axis module, the X-axis module is arranged on the workbench, the Y-axis module is installed on the X-axis module, the Z-axis module is vertically arranged on the Y-axis module, a probe assembly is arranged on the Z-axis module, and the probe assembly is electrically connected with the internal resistance tester. According to the utility model, assembled lithium battery modules are conveyed into the equipment through an assembly line, automatic internal resistance measurement can be realized, the risks of low efficiency and error proneness of manual internal resistance measurement are avoided, and the efficiency of lithium battery internal resistance measurement is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery module manufacturing, in particular to a voltage internal resistance testing device for multiple types of lithium batteries. Background Art

[0002] In recent years, my country's new energy vehicle industry has developed rapidly, and the use of new energy vehicles has become more and more popular. As one of the core components of new energy vehicles, the production process of lithium battery modules has very high requirements, especially the need to ensure the quality and safety of battery module production. The internal resistance of the aluminum shell mold will be tested. The internal resistance affects the power performance and discharge efficiency of the lithium battery. As the storage time increases, the battery continues to age and its internal resistance continues to increase. Different types of lithium batteries have different degrees of internal resistance changes, and their initial internal resistance is mainly affected by the structural design of the battery, the performance of the raw materials and the process technology. By testing the internal resistance, the performance of the battery under high-power applications can be fully evaluated, which is a key parameter for measuring power performance and life.

[0003] In the traditional production of small batches of modules, the internal resistance is measured manually, using an internal resistance tester to test each module. However, during manual testing, the measurement error is relatively large due to the different contact strength and area of ​​the mold. It is also inconvenient to record the tested equipment, which is not conducive to the traceability of the battery. In large-scale production, in order to ensure stable production, the internal resistance test equipment will be customized for one type of battery. When making other types of modules, it is difficult to change the process. Therefore, an internal resistance test equipment that is compatible with multiple types of lithium batteries is needed, and at the same time, the measurement data can be uploaded to the MES system in a timely and effective manner. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-model lithium battery voltage internal resistance test device. The device transmits the assembled lithium battery module to the inside of the device through an assembly line, and can realize manual or automatic internal resistance measurement. It is suitable for various batch productions and is compatible with various models of lithium batteries. It avoids the low efficiency and error risk of manual internal resistance measurement, improves the efficiency of lithium battery internal resistance measurement, and uploads the internal resistance measurement data to the MES system to achieve real-time monitoring and convenient traceability.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: a multi-model lithium battery voltage internal resistance testing device, including an electrical integrated cabinet and an internal resistance measuring mechanism, the electrical integrated cabinet includes a cabinet body, a workbench arranged on the cabinet body, a transmission mechanism and an internal resistance tester, the internal resistance measuring mechanism includes an X-axis module, a Y-axis module and a Z-axis module, the X-axis module is arranged on the workbench, the Y-axis module is installed on the X-axis module, the Z-axis module is vertically arranged on the Y-axis module, a probe assembly is arranged on the Z-axis module, and the probe assembly is electrically connected to the internal resistance tester.

[0006] The utility model is further configured as follows: the transmission mechanism includes a stepper motor, a synchronous belt, a driving transmission pulley, a conveyor belt, and a driven transmission pulley; the stepper motor is arranged on the workbench; a synchronous pulley is fixedly connected to the output end of the stepper motor; the synchronous pulley is connected to the driving transmission pulley through a synchronous belt; the driving transmission pulley and the driven transmission pulley are rotatably connected on the workbench; and the driving transmission pulley and the driven transmission pulley are connected through a conveyor belt.

[0007] The utility model is further configured as follows: a left guide plate and a right guide plate are respectively arranged on the workbenches on both sides of the conveyor belt.

[0008] The utility model is further configured as follows: a left positioning cylinder is arranged on the left guide plate, and a right positioning cylinder is arranged on the right guide plate.

[0009] The utility model is further configured as follows: a position sensor is also installed on the work surface, and when the position sensor detects a signal, the right positioning cylinder is activated to push the lithium battery pack to make it fit with the positioning surface of the left guide plate.

[0010] The utility model is further configured as follows: an X-axis base is provided on the workbench, an X-axis pad is provided above the X-axis base, and the X-axis module is mounted on the X-axis pad; an X-axis slider is mounted on the X-axis module, a Y-axis pad is mounted on the X-axis slider, and the Y-axis module is mounted on the Y-axis pad; a Y-axis slider is mounted on the Y-axis pad, a Z-axis pad is mounted on the Y-axis slider, and the Z-axis module is mounted on the Z-axis pad.

[0011] The utility model is further configured as follows: the probe assembly includes a probe plate fixing seat, a probe block mounting plate, a probe block, a probe mounting hole, and a probe; the probe plate fixing seat is installed on the Z-axis module; the probe block mounting plate is installed below the probe plate fixing seat; two probe blocks are arranged below the probe block mounting plate; a probe mounting hole is arranged on the probe block; the probe is installed in the probe mounting hole; and the probe is electrically connected to an internal resistance tester.

[0012] The utility model is further configured as follows: a protective cover frame is also arranged on the workbench, and a protective cover is arranged on the outer surface of the protective cover frame.

[0013] The utility model is further configured as follows: a slider fixing seat is installed at the end of the Y-axis module, a linear slide rail is installed on the slider fixing seat, the linear slide rail is parallel to the X-axis module, a slide rail mounting plate is fixedly installed on the protective cover frame, and the linear slide rail is fixedly installed on the slide rail mounting plate.

[0014] The utility model is further configured as follows: a three-color warning light is arranged above the protective cover.

[0015] The beneficial effect of the utility model is: to provide a multi-model lithium battery voltage internal resistance testing device, the device will be assembled lithium battery module, through the assembly line, to the inside of the device, can realize automatic internal resistance measurement, adapt to various batches of production, compatible with various models of lithium batteries, avoid the low efficiency of manual internal resistance measurement, the risk of easy errors, improve the efficiency of lithium battery internal resistance measurement, and upload the internal resistance measurement data to the MES system, so as to achieve real-time monitoring and convenient traceability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0019] Figure 3 It is a main structural schematic diagram of the utility model.

[0020] Figure 4 It is a schematic diagram of the partial explosion structure of the utility model.

[0021] Figure 5 It is a structural schematic diagram of the internal resistance measuring mechanism of the utility model.

[0022] Figure 6 It is a main structural schematic diagram of the internal resistance measuring mechanism of the utility model.

[0023] In the figure, 1. electrical integrated cabinet; 101. cabinet; 102. stepper motor; 103. synchronous belt; 104. active transmission pulley; 105. conveyor belt; 106. workbench; 107. pneumatic triplex; 108. solenoid valve group; 109. driven transmission pulley; 110. switch control panel; 111. internal resistance tester; 112. host computer; 113. protective cover frame; 114. protective cover; 115. three-color alarm light; 2. internal resistance measuring mechanism; 201. X-axis base; 202, X-axis pad; 203, X-axis module; 204, Y-axis pad; 205, Y-axis module; 206, Z-axis pad; 207, Z-axis module; 208, probe plate fixing seat; 209, probe block mounting plate; 210, probe block; 211, probe; 212, slider fixing seat; 213, linear slide rail; 214, slide rail mounting plate; 215, left guide plate; 216, left positioning cylinder; 217, position sensor; 218, right guide plate; 219, right positioning cylinder. DETAILED DESCRIPTION

[0024] The technical solution of the utility model will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Examples, such as Figure 1-Figure 6 As shown, a multi-model lithium battery voltage internal resistance test device includes a conveyor belt electrical integrated cabinet 1 and an internal resistance measuring mechanism 2; the conveyor belt electrical integrated cabinet 1 includes a cabinet body 101, a stepper motor 102, a synchronous belt 103, an active conveyor pulley 104, a conveyor belt 105, a workbench 106, a pneumatic triplet 107, a solenoid valve group 108, a driven conveyor pulley 109, a switch control panel 110, an internal resistance tester 111, a host computer 112, a protective cover frame 113, a protective cover 114, and a three-color alarm light 115, the internal resistance measuring mechanism 2 includes an X-axis base 201, an X-axis pad 202, an X-axis module 203, a Y-axis pad 204, a Y-axis module 205, a Z-axis pad 206, a Z-axis module 207, a probe plate fixing seat 208, a probe block mounting plate 209, a probe block 210, a probe 211, a slider fixing seat 212, a linear slide rail 213, a slide rail mounting plate 214, a left guide plate 215, a left positioning cylinder 216, a position sensor 217, a right guide plate 218, and a right positioning cylinder 219.

[0026] like Figure 2-Figure 4As shown, electrical integrated cabinet 1: cabinet body 101 is a rectangular parallelepiped reinforced by profile frame, the surface is covered with 1mm steel plate, 4 casters and 4 adjustment feet are installed at the bottom, its main function is to bear weight, computer mainframe, PLC, driver and other electrical components are placed inside, and accessory mechanisms are installed on cabinet body 101, transmission mechanism: including stepper motor 102 model is 86 stepper motor, the motor is equipped with synchronous pulley, and power is transmitted to active transmission pulley 104 through synchronous belt 103, the transmission belt 105 is installed on workbench 106, one end of the transmission belt is installed on active transmission pulley 104, and the other end is installed on driven transmission pulley 109, its function is The lithium battery module to be tested is transferred to the test station. The driven conveyor pulley 109, whose main function is to adjust the tightness of the conveyor belt 105, is installed on the far right of the workbench 106. The right test surface of the cabinet 101 is recessed into a direction area. A pneumatic triplet 107 is installed in the recessed area. Its function is to connect to the external power supply and provide compressed air to the entire equipment. The recessed area is also equipped with a solenoid valve group 108, which is used to provide a conversion air source for the cylinder in the equipment. On the first cabinet door on the right in front of the cabinet 101, there is a switch control panel 110. The panel is equipped with emergency stop, manual / automatic, start, and close buttons. An internal resistance tester 111 is embedded below the button, which is the main component of this equipment. The display 112 of the host computer is installed on the plane of the workbench 106. Its function is to adjust the equipment parameters and collect test data and upload it to the MES system. A protective cover frame 113 is also installed on the plane of the workbench 106. The material is made of profiles fastened together. A 5mm thick protective cover 114 is installed on the surface. The material is a transparent acrylic plate to prevent dust and protect. A three-color alarm light 115 is installed on the upper end of the protective cover 114. Its function is that when the equipment stops after a failure, it will emit a buzzing sound and a flashing light to remind the staff.

[0027] like Figure 5 , Figure 6As shown, the internal resistance measuring mechanism 2: the X-axis base 201 is two square columns, which are installed on the workbench 106. An X-axis pad 202 is installed on the upper surface of the X-axis base 201, and its main function is to install and fix the X-axis module 203, and at the same time strengthen the force of the module. A Y-axis pad 204 is installed above the slider of the X-axis module 203, and its main function is to install and fix the Y-axis module 205. A Z-axis pad 206 and a Z-axis module 207 are installed on the slider of the Y-axis module 205, and their main function is to provide up and down directions for the device. A probe plate fixing seat 20 is installed on the slider of the Z-axis module 207. 8, its function is to assist the installation between the probe board and the module, and play a supporting and strengthening role. The probe block mounting plate 209 is fixed below the probe board fixing seat 208, and two adjustable probe blocks 210 are installed below it. Each probe block has two probe mounting holes, and two probes 211 are installed in parallel as a group. The probes 211 are large current gold-plated probes, 2 positive poles and 2 negative poles. Cables are welded behind the probes 211 and connected to the internal resistance tester 111. When the equipment is working, the two groups of probes directly contact the positive and negative poles of the lithium battery pack, and transmit the data measured by the poles to the internal resistance tester 1 11, and simultaneously uploaded to the host computer 112 for internal recording, the top of the Y-axis module 205 is installed with a slider fixing seat 212, and a linear slide rail 213 is fixed thereto, and the linear slide rail 213 is installed on the slide rail mounting plate 214 in parallel with the X-axis module 203, and the slide rail mounting plate 214 is fixed on the 30*60 profile plate in front of the protective cover frame 113. This mechanism is to assist the operation of the X-axis module 203. Because the cantilever of the Y-axis module 205 is too long, if no auxiliary slide rail is made, the X-axis will be deflected during movement, and the left guide plate 215 and the right guide plate 218 are respectively fixed on the transmission On the platform of the workbench 106 on both sides of the conveyor belt 105, its function is to guide the lithium battery module on the conveyor belt and accurately transfer it to the bottom of the equipment internal resistance measurement station. A left positioning cylinder 216 is installed above the left guide plate 215, and the air inlet and outlet are connected to the electromagnetic valve group 108, which is in a normally open state and is used to intercept the lithium battery group uploaded and unloaded from the conveyor belt. A position sensor 217 is also installed next to the left positioning cylinder 216, and its function is to detect the position signal of the lithium battery group. When the signal is detected, the right positioning cylinder 219 will start to push the lithium battery group to fit on the positioning surface of the left guide plate 215. The air inlet and outlet of the right positioning cylinder 219 are connected to the electromagnetic valve group 108.

[0028] Working principle: Before the device measures the internal resistance of a new model lithium battery pack, it needs to set parameters. After the device is powered on, turn on the start button on the switch control panel 110, the device starts, the host computer 112 and the internal resistance tester 111 start, according to the shape of the lithium battery pack, input the motion parameters and module dots of the X\Y\Z axis module on the host computer 112, adjust the position of the probe block 210 on the probe block mounting plate 209 through the spacing between the two pole ears of the battery module, and align the two sets of probes 211 with the positive and negative poles of the lithium battery pack. According to the performance parameters of the lithium battery pack, set the upper and lower limits of the internal resistance on the internal resistance tester 111, so that the parameters are set, start the device, and turn the manual / automatic button on the switch control panel 110 to "automatic".

[0029] After the equipment is started, the stepper motor 102 starts to rotate, and drives the active conveyor pulley 104 through the synchronous belt 103, and converts the motor's rotational motion into linear motion through the conveyor belt 105. At this time, the lithium battery module of the production line enters from the left end of the equipment and is conveyed from left to right through the conveyor belt 105. When the lithium battery module is conveyed to the position of the left guide plate 215 and the right guide plate, the position and posture of the lithium battery module gradually begin to be adjusted through the inclined surface of the guide plate, and the lithium battery module finally enters the positioning groove between the left guide plate 215 and the right guide plate 218. When the lithium battery module is being transported, it will be intercepted by the left positioning cylinder 216 installed on the left guide plate 215. At the same time, the position sensor 217 detects the lithium battery module and transmits the signal to the PLC inside the cabinet 101. Through the set program, the stepper motor 102 stops running and the conveyor belt 105 stops transmitting. The PLC transmits the signal to the solenoid valve group 108. The solenoid valve group 108 controls the air source to drive the right positioning cylinder 219 to start. The positioning block on the cylinder pushes the lithium battery pack to fit on the positioning surface of the left guide plate 215. The Z-axis module 207 starts to press down the probe block mounting plate 209, and the two groups of probes on the probe plate directly contact the positive and negative poles of the lithium battery pack to start the internal resistance test of the lithium battery module. After 3 to 8 seconds of testing, the resistance parameters are displayed in real time on the internal resistance tester 111, and the measured data are stored and transmitted to the host computer 112. The data will be shared with the MES management system used for production. At this time, the PLC inside the cabinet 101 gives a signal, and the solenoid valve group 108 controls the air source to drive the left positioning cylinder 216 and the right positioning cylinder 219. The left positioning cylinder 216 and the right positioning cylinder 219 stop intercepting and positioning, and the PLC transmits the signal to the stepper motor 102 to start running. The conveyor belt 105 transmits the lithium battery module with measured internal resistance to the next process to complete the internal resistance test.

[0030] If an equipment failure occurs during the period, for example: the Z-axis module 207 is pressed down, the probe is aimed at the pole of the lithium battery module, the lithium battery module is not detected, or the module or cylinder is not operating normally, the equipment will be suspended, and the three-color alarm light 115 installed on the upper end of the protective cover 114 will intermittently emit a buzzing sound, and the three-color light will flash to remind the staff to detect or troubleshoot the equipment failure.

[0031] For a small number of lithium battery modules for experimental purposes, when the internal resistance needs to be measured, the manual / automatic button in the switch control panel 110 can be turned to "manual", the lithium battery module can be manually placed on the conveyor belt 105, and the "start button" can be pressed. Each time the device is pressed, one part is operated, and the manual internal resistance measurement is gradually completed. Then, the test data you want can be directly and manually exported through the background data of the MES system.

Claims

1. A multi-model lithium battery voltage internal resistance test device, characterized by: The invention comprises an electrical integrated cabinet (1) and an internal resistance measuring mechanism (2), wherein the electrical integrated cabinet (1) comprises a cabinet body (101), a workbench (106) arranged on the cabinet body (101), a transmission mechanism and an internal resistance tester (111), and the internal resistance measuring mechanism (2) comprises an X-axis module (203), a Y-axis module (205) and a Z-axis module (207), wherein the X-axis module (203) is arranged on the workbench (106), the Y-axis module (205) is installed on the X-axis module (203), the Z-axis module (207) is arranged vertically on the Y-axis module (205), and a probe assembly is arranged on the Z-axis module (207), and the probe assembly is electrically connected to the internal resistance tester (111).

2. A multi-model lithium battery voltage internal resistance test device according to claim 1, characterized in that: The transmission mechanism comprises a stepper motor (102), a synchronous belt (103), a driving transmission pulley (104), a transmission belt (105), and a driven transmission pulley (109); the stepper motor (102) is arranged on the workbench (106); the output end of the stepper motor (102) is fixedly connected with a synchronous pulley; the synchronous pulley is connected to the driving transmission pulley (104) through a synchronous belt (103); the driving transmission pulley (104) and the driven transmission pulley (109) are rotatably connected to the workbench (106); the driving transmission pulley (104) and the driven transmission pulley (109) are connected through a transmission belt (105).

3. A multi-model lithium battery voltage internal resistance test device according to claim 2, characterized in that: A left guide plate (215) and a right guide plate (218) are respectively arranged on the workbench (106) on both sides of the conveyor belt (105).

4. A multi-model lithium battery voltage internal resistance test device according to claim 3, characterized in that: The left guide plate (215) is provided with a left positioning cylinder (216), and the right guide plate (218) is provided with a right positioning cylinder (219).

5. The multi-model lithium battery voltage internal resistance test device according to claim 4, characterized in that: A position sensor (217) is also installed on the workbench (106). When the position sensor (217) detects a signal, the right positioning cylinder (219) is activated to push the lithium battery pack so that it fits with the positioning surface of the left guide plate (215).

6. The multi-model lithium battery voltage internal resistance test equipment according to claim 1, characterized in that: An X-axis base (201) is arranged on the workbench (106), an X-axis pad (202) is arranged above the X-axis base (201), and the X-axis module (203) is mounted on the X-axis pad (202); an X-axis slider is mounted on the X-axis module (203), a Y-axis pad (204) is mounted on the X-axis slider, and the Y-axis module (205) is mounted on the Y-axis pad (204); a Y-axis slider is mounted on the Y-axis pad (204), a Z-axis pad (206) is mounted on the Y-axis slider, and the Z-axis module (207) is mounted on the Z-axis pad (206).

7. A multi-model lithium battery voltage internal resistance test device according to claim 6, characterized in that: The probe assembly includes a probe board fixing seat (208), a probe block mounting plate (209), a probe block (210), a probe mounting hole, and a probe (211). The probe board fixing seat (208) is installed on the Z-axis module (207), the probe block mounting plate (209) is installed below the probe board fixing seat (208), two probe blocks (210) are arranged below the probe block mounting plate (209), a probe mounting hole is arranged on the probe block (210), the probe (211) is installed in the probe mounting hole, and the probe (211) is electrically connected to the internal resistance tester (111).

8. The multi-model lithium battery voltage internal resistance test device according to claim 1, characterized in that: A protective cover frame (113) is also installed on the workbench (106), and a protective cover (114) is arranged on the outer surface of the protective cover frame (113).

9. The multi-model lithium battery voltage internal resistance test device according to claim 8, characterized in that: A slider fixing seat (212) is installed at the end of the Y-axis module (205), and a linear slide rail (213) is installed on the slider fixing seat (212). The linear slide rail (213) is parallel to the X-axis module (203). A slide rail mounting plate (214) is fixedly installed on the protective cover frame (113), and the linear slide rail (213) is fixedly installed on the slide rail mounting plate (214).

10. The multi-model lithium battery voltage internal resistance test device according to claim 8, characterized in that: A three-color warning light (115) is arranged above the protective cover (114).

Images