Battery through-wall welding pre-treatment apparatus and method

Abstract

The application provides a battery through-wall welding pretreatment device and method, and belongs to the technical field of battery production. The battery through-wall welding pretreatment device comprises a frame body, a pre-pressing clamp, a temperature testing assembly and a resistance testing assembly. The pre-pressing clamp comprises two clamp plates which are oppositely arranged and used for clamping on both sides of the intermediate pole column. The temperature testing assembly comprises a semiconductor heating sheet and an infrared detector. The resistance testing assembly comprises a pre-pressing welding point arranged on the working surface of the clamp plate and a resistance tester arranged on the frame body. The battery through-wall welding pretreatment device provided by the application can detect and adjust the temperature of the intermediate pole column through the semiconductor heating sheet and the infrared detector, and detect the resistance value of the intermediate pole column through the pre-pressing welding point and the resistance tester. The intermediate pole column after pretreatment meets the requirements of temperature and resistance value, and then directly undergoes through-wall welding. The welding quality and efficiency of the through-wall welding can be improved.

Description

Technical Field

[0001] This invention belongs to the field of battery manufacturing technology, and more specifically, relates to a battery through-wall welding pretreatment equipment and method. Background Technology

[0002] Lead-acid batteries primarily use through-wall welding to connect individual cells in series. The quality of this welding directly affects the battery's quality. However, as a special welding process, it is prone to defects such as false welds, lead spatter, and porosity. These defects can lead to solder joint breakage and increased internal resistance during battery use, ultimately rendering the battery unusable and severely impacting its lifespan. Therefore, the quality of through-wall welding determines the battery's reliability and lifespan, making it a crucial step in battery manufacturing.

[0003] Through-wall welding of batteries mainly uses medium-frequency welding, and its working principle is Q... 生 =I 2 Rt and I are the output current of the through-wall welding machine; R = 2Rn + Rz + 2Rzj (Rn is the internal resistance of the intermediate electrode (Ω), Rz is the contact resistance between the two intermediate electrodes (Ω), and Rzj is the contact resistance between the welding head and the intermediate electrode (Ω)); t is the welding process time. I and t are the through-wall welding settings, and their deviations are relatively small. Therefore, R is the key factor affecting the heat generated during through-wall welding.

[0004] Through-wall welding requires heat Q 需 =Q 融化热 +Q 温度升到熔点需要的热 +Q 传递 =(πδD) 2 / 4)ρC 熔 +(πδD 2 / 4)ρC 比 △T+2S1 t0 λT(t)dt, where Q 融化热 and Q 传递 The deviation is small, therefore the key factor affecting the heat required for through-wall welding is Q. 温度升到熔点需要的热 This is equivalent to ΔT. Therefore, R and ΔT are the main factors affecting the welding quality of through-wall welding.

[0005] Currently, in domestic and international through-wall welding machines, the battery is directly welded after entering the track for positioning. After welding, the resistance, current, power, etc. are tested and defective products are rejected. However, it is impossible to test the battery's resistance and temperature in advance before welding, which cannot guarantee the welding stability of through-wall welding. It is also impossible to avoid weld defects such as false welding, lead spatter, and porosity during the welding process, which can cause the battery to be scrapped and increase the battery manufacturing cost. Summary of the Invention

[0006] The purpose of this invention is to provide a battery through-wall welding pretreatment device and method, which aims to test the temperature and resistance of the terminals before welding.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a battery through-wall welding pretreatment device and method, comprising:

[0008] A frame, which is located above the battery transport track and has longitudinal freedom;

[0009] The pre-compression clamp includes two clamping plates that are horizontally movable below the frame, and the two clamping plates are arranged opposite each other and used to clamp the two sides of the intermediate pole.

[0010] The temperature testing assembly includes a semiconductor heating element and an infrared detector spaced from bottom to top on the working surface of the clamp plate. The semiconductor heating element is connected to a power supply and is used to heat the intermediate electrode. The infrared detector is used to identify the temperature of the intermediate electrode.

[0011] The resistance testing assembly includes a pre-pressed solder joint disposed on the working surface of the clamp plate and a resistance tester disposed on the frame. The pre-pressed solder joint is located on one side of the semiconductor heating element, and the pre-pressed solder joint is abutted against both sides of the intermediate electrode by means of the clamp plate. The resistance tester is connected to the pre-pressed solder joint and is used to test the resistance value of the intermediate electrode.

[0012] In another embodiment of this application, when the intermediate pole is in a clamping state, the pre-compression distance between the two clamping plates is less than 1 / 2 of the through-wall welding closure distance.

[0013] In another embodiment of this application, the semiconductor heating element is a ring structure, and the pre-pressure solder joint is a cylinder; the pre-pressure solder joint is located on the inner side of the semiconductor heating element, and the inner diameter of the semiconductor heating element is the same as the outer diameter of the pre-pressure solder joint.

[0014] In another embodiment of this application, the thickness of the semiconductor heating element is less than the thickness of the pre-pressed solder joint, and the working surface of the semiconductor heating element is spaced apart from the intermediate electrode post.

[0015] In another embodiment of this application, the temperature testing component further includes:

[0016] A first controller is mounted on the frame; the first controller is electrically connected to the infrared detector and the power supply; the first controller includes a signal receiving module and a signal transmission module; the signal receiving module is used to receive the temperature signal emitted by the infrared detector; the signal transmission module is used to send a command signal to the power supply.

[0017] In another embodiment of this application, the resistance testing component further includes:

[0018] A second controller is mounted on the frame; the second controller is electrically connected to the resistance tester.

[0019] An alarm is mounted on the frame; the alarm is electrically connected to the second controller.

[0020] As another embodiment of this application, the frame includes:

[0021] Top frame body, the top frame body being located above the storage battery;

[0022] Two extension arms are symmetrically arranged on both sides of the top frame body and extend downward; the inner side of each of the two extension arms is provided with a horizontal telescopic member, and the free ends of the two horizontal telescopic members are respectively connected to the back side of the two clamps.

[0023] As another embodiment of this application, it also includes:

[0024] A fixed frame, wherein the top frame body is located below the fixed frame;

[0025] A longitudinal telescopic member, the fixed end of which is connected to the bottom end of the fixed frame, and the free end of which is connected to the top end of the top frame body.

[0026] The beneficial effects of the battery through-wall welding pretreatment equipment provided by this invention are as follows: Compared with the prior art, the battery through-wall welding pretreatment equipment of this invention performs temperature and resistance detection on the intermediate terminal of the battery before through-wall welding. The temperature of the intermediate terminal is detected and adjusted by setting a semiconductor heating element and an infrared detector; and the resistance value of the intermediate terminal is detected by pre-pressing the solder joint and a resistance tester. After the pretreated intermediate terminal meets the temperature and resistance requirements, through-wall welding can be performed directly. This can improve the welding quality and welding efficiency of through-wall welding. In addition, it can reduce battery scrap and reduce battery production costs.

[0027] A pretreatment method for through-wall welding of a storage battery is also provided, including the following steps:

[0028] S1. When the battery moves to the pre-processing station on the conveyor track, stop conveying;

[0029] S2. The longitudinal telescopic component drives the top frame body to extend downward. After reaching the fixed extension position, it drives the preload clamp to move horizontally, so that the two clamp plates approach the middle terminal of the upper end of the battery and clamp the middle terminal.

[0030] S3. Turn on the temperature testing component and use an infrared detector to identify the temperature value of the intermediate electrode.

[0031] When the temperature value is within the set process temperature range, proceed to the next step;

[0032] When the temperature value exceeds the upper limit of the set process temperature range, remove the battery and let it cool. Repeat step S3 after cooling.

[0033] When the temperature value is lower than the lower limit of the set process temperature range, the semiconductor heating element is powered on and heats the intermediate electrode until the temperature value is within the set process temperature range, then proceeds to the next step.

[0034] S4. Turn on the resistance test component, provide a constant current to the pre-compression solder joint through the resistance tester, and test the resistance value of the intermediate electrode.

[0035] When the resistance test value is within the set process resistance range, the resistance test value meets the standard, and the battery is moved to the through-wall welding station.

[0036] When the resistance test value is outside the set process resistance range, the resistance test value is not up to standard, and the battery will be rejected.

[0037] In another embodiment of this application, in step S3, a first alarm system is provided, which is activated when the temperature value is outside the set process temperature range; in step S4, a second alarm system is provided, which is activated when the temperature value is outside the set process resistance range.

[0038] The beneficial effects of the battery through-wall welding pretreatment method provided by the present invention are as follows: Compared with the prior art, the battery through-wall welding pretreatment method of the present invention adds a pretreatment process before through-wall welding, which can detect the temperature value of the intermediate terminal in advance and adjust the temperature value of the intermediate terminal to the process temperature range set for through-wall welding; and remove unqualified batteries whose resistance value is outside the set process resistance range by resistance detection, thereby reducing quality defects in through-wall welding and improving the efficiency and welding stability of through-wall welding. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of the battery through-wall welding pretreatment equipment provided in an embodiment of the present invention.

[0041] In the diagram: 1. Fixing frame; 2. Longitudinal telescopic component; 3. Top frame body; 4. First controller; 5. Power supply; 6. Extension arm; 7. Horizontal telescopic component; 8. Clamp plate; 9. Infrared detector; 10. Semiconductor heating element; 11. Pre-pressurized solder joint; 12. Second controller; 13. Resistance tester; 14. Alarm; 15. Battery; 16. Intermediate terminal. Detailed Implementation

[0042] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0043] Please see Figure 1 The battery through-wall welding pretreatment equipment and method provided by the present invention will now be described. The battery through-wall welding pretreatment equipment includes a frame, a pre-pressure clamp, a temperature testing component, and a resistance testing component. The frame is located above the transport track of the battery 15 and has longitudinal freedom. The pre-pressure clamp includes two horizontally movable clamp plates 8 located below the frame, which are arranged opposite each other and used to clamp the intermediate terminal 16 on both sides. The temperature testing component includes a semiconductor heating element 10 and an infrared detector 9 spaced from bottom to top on the working surface of the clamp plate 8. The semiconductor heating element 10 is connected to a power supply 5 and used to heat the intermediate terminal 16. The infrared detector 9 is used to identify the temperature of the intermediate terminal 16. The resistance testing component includes a pre-pressure solder joint 11 located on the working surface of the clamp plate 8 and a resistance tester 13 located on the frame. The pre-pressure solder joint 11 is located on one side of the semiconductor heating element 10 and is pressed against both sides of the intermediate terminal 16 by means of the clamp plate 8. The resistance tester 13 is connected to the pre-pressure solder joint 11 and is used to test the resistance value of the intermediate terminal 16.

[0044] Temperature and resistance are the main factors affecting the welding quality of through-wall welding. In order to improve the welding efficiency and welding quality of through-wall welding, a pre-treatment device is set up before through-wall welding. The pre-treatment device detects the temperature and resistance of the intermediate electrode 16, and the intermediate electrode 16 that passes the test is transported to the next station for through-wall welding.

[0045] A pre-processing station area is provided on the conveyor track. The battery 15 is positioned in the pre-processing station area by controlling the start and stop status of the conveyor track. When the battery 15 is positioned in the pre-processing station area, the frame is located above the battery 15. The two clamping plates 8 of the pre-pressure clamp below the frame are located on both sides of the middle terminal 16 of the battery 15. The two clamping plates 8 move horizontally and approach each other at the same time, and the two clamping plates 8 are respectively attached to both sides of the middle terminal 16. At this time, the semiconductor heating element 10 and the infrared detector 9 of the temperature testing component are located on the side and above the middle terminal 16, respectively; the pre-pressure solder joint 11 of the resistance testing component is located on the side of the middle terminal 16 and attached to the side wall of the middle terminal 16.

[0046] After the battery 15 and the frame are in place, a temperature test is initiated. This test primarily uses an infrared detector 9 to detect the real-time temperature of the intermediate terminal 16 located between the two clamps 8. Once the temperature of the intermediate terminal 16 is within acceptable limits, a resistance test is performed. Temperatures that are too low or too high will affect the welding quality. If the temperature of the intermediate terminal 16 is too low, it needs to be reheated using a semiconductor heating element 10 until the temperature meets the requirements. If the temperature of the intermediate terminal 16 is too high, the battery needs to be removed from the station and allowed to cool. After cooling, the temperature test is repeated until the temperature meets the set process temperature range. Once the temperature is within acceptable limits, a resistance tester 13 is activated. The resistance tester 13 connects to the two pre-compression solder joints 11 and applies a stable current to them to detect the resistance of the intermediate terminal 16 between the two pre-compression solder joints 11. The resistance value is then judged. Only when the resistance value is within the set process resistance range can through-wall welding be performed. When the resistance value is greater than or less than the set process resistance range, the intermediate terminal 16 of the battery 15 is a defective product and needs to be rejected and reworked.

[0047] The battery through-wall welding pretreatment equipment provided by this invention, compared with the prior art, performs temperature and resistance detection on the intermediate terminal 16 of the battery 15 before through-wall welding. The temperature of the intermediate terminal 16 is detected and adjusted by setting a semiconductor heating element 10 and an infrared detector 9; and the resistance value of the intermediate terminal 16 is detected by a pre-pressed solder joint 11 and a resistance tester 13. After the pretreatment of the intermediate terminal 16 meets the requirements of temperature and resistance value, through-wall welding can be performed directly. This can improve the welding quality and welding efficiency of through-wall welding. In addition, it can also reduce battery scrap and reduce battery production costs.

[0048] Optionally, the clamp plate 8 can be made of insulating material. The upper end of the clamp plate 8 is located at the lower end of the frame via a sliding module. The sliding module can be an electric slide rail, a push cylinder, or an electric push rod, etc. The semiconductor heating element 10 can be an aluminum nitride heater, a high-temperature ceramic heating element, or a graphene heating element, etc. The infrared detector 9 can be a First high-precision non-contact short-wave infrared temperature sensor, etc. The resistance tester 13 can be a YTC5915 smart battery 15 internal resistance tester, etc.

[0049] Optionally, when the intermediate terminal 16 is in the clamping state, the pre-compression distance between the two clamping plates 8 is less than half of the through-wall welding closing distance. That is, when the battery 15 moves to the pre-processing station, the clamping plates 8 move horizontally, and the two clamping plates 8 move relative to each other closer to the intermediate terminal 16. The distance between the two clamping plates 8 after positioning is less than half of the closing distance in the through-wall welding working state. At this distance, the pre-compression welding point 11 completes the pre-compression of the intermediate terminal 16.

[0050] After pre-pressure is completed, temperature and resistance detection of intermediate electrode 16 are activated.

[0051] In some possible embodiments, please refer to Figure 1 The semiconductor heating element 10 has a circular ring structure, and the pre-pressure solder joint 11 is a cylinder. The pre-pressure solder joint 11 is located inside the semiconductor heating element 10, and the inner diameter of the semiconductor heating element 10 is the same as the outer diameter of the pre-pressure solder joint 11.

[0052] The pre-pressure solder joint 11 corresponds to the middle part of the intermediate electrode 16 to ensure the accuracy of resistance measurement; while the semiconductor heating element 10 needs to heat the entire intermediate electrode 16, so the semiconductor heating element 10 is arranged around the outside of the pre-pressure solder joint 11.

[0053] Both the semiconductor heating element 10 and the pre-pressed solder joint 11 are fixed on the working surface of the clamp plate 8. The inner sidewall of the semiconductor heating element 10 is in contact with the outer sidewall of the pre-pressed solder joint 11. Optionally, the thickness of the semiconductor heating element 10 is less than the thickness of the pre-pressed solder joint 11, and the working surface of the semiconductor heating element 10 is spaced apart from the intermediate electrode post 16.

[0054] In some possible embodiments, please refer to Figure 1 The temperature testing component also includes a first controller 4, which is mounted on the frame. The first controller 4 is electrically connected to the infrared detector 9 and the power supply 5. The first controller 4 includes a signal receiving module and a signal transmission module. The signal receiving module is used to receive the temperature signal emitted by the infrared detector 9. The signal transmission module is used to send a command signal to the power supply 5.

[0055] The first controller 4 is fixed to the frame and extends outward with multiple wire connectors, which are respectively connected to the infrared detector 9 and the power supply 5. During temperature detection, the infrared detector 9 first detects the temperature of the intermediate electrode 16. The signal generated by the detection is transmitted to the signal receiving module in the first controller 4 via the wire connectors. The first controller 4 determines whether the temperature value received by the signal receiving module reaches the set process temperature range. If the temperature value is less than the lower limit of the process temperature range, the signal transmission module transmits the power-on signal to the power supply 5. After the power supply 5 is turned on, the intermediate electrode 16 is heated by the semiconductor heating ring.

[0056] The first controller 4 can be a ZY-9010G temperature controller.

[0057] In some possible embodiments, please refer to Figure 1 The resistance testing assembly also includes a second controller 12 and an alarm 14; the second controller 12 is mounted on the frame; the second controller 12 is electrically connected to the resistance tester 13; the alarm 14 is mounted on the frame; the alarm 14 is electrically connected to the second controller 12.

[0058] The second controller 12 is fixed to the frame and has multiple wire connectors extending outwards. These wire connectors connect the resistance tester 13 and the alarm 14. The resistance value detected by the resistance tester 13 at the intermediate terminal 16 is transmitted to the second controller 12. The second controller 12 compares the resistance value with a set process resistance range. When the resistance value exceeds the set range, the second controller 12 sends a signal to the alarm 14, causing the alarm to sound. The second controller 12 can be a microcontroller.

[0059] In some possible embodiments, please refer to Figure 1 The frame includes a top frame body 3 and two extension arms 6; the top frame body 3 is located above the battery 15; the two extension arms 6 are symmetrically arranged on both sides of the top frame body 3 and extend downward; the inner side of each of the two extension arms 6 is provided with a horizontal telescopic member 7, and the free ends of the two horizontal telescopic members 7 are respectively connected to the back side of the two clamps 8.

[0060] Both extension arms 6 of the top frame body 3 extend downwards, and the two extension arms 6 are symmetrically arranged. The horizontal telescopic component 7 can be a telescopic cylinder. The fixed end of the telescopic cylinder is installed on the inner side of the extension arm 6, and the movable end of the telescopic cylinder is connected to the clamp plate 8.

[0061] The battery through-wall welding pretreatment equipment also includes a fixed frame 1 and a longitudinal telescopic component 2, with the top frame body 3 located below the fixed frame 1; the fixed end of the longitudinal telescopic component 2 is connected to the bottom end of the fixed frame 1, and the free end of the longitudinal telescopic component 2 is connected to the top end of the top frame body 3.

[0062] The top frame body 3 is located below the fixed frame 1 and is raised and lowered by means of the longitudinal telescopic component 2. The longitudinal telescopic component 2 can be a telescopic cylinder.

[0063] After the battery 15 is transported to the pre-processing station area, the battery 15 stops moving; the longitudinal telescopic member 2 extends, and the top frame body 3 moves downward; when the top frame body 3 moves to the designated position, the longitudinal telescopic member 2 stops extending, and at the same time, the horizontal telescopic member 7 extends, driving the clamp plate 8 to approach the intermediate terminal 16. After the temperature and resistance tests are completed, the operation is reversed, and the horizontal telescopic member 7 and the longitudinal telescopic member 2 are retracted in sequence.

[0064] A method for pretreatment of through-wall welding of a battery is also provided, which uses the above-mentioned battery through-wall welding pretreatment equipment and includes the following steps:

[0065] S1. When the battery 15 moves to the pre-processing station on the conveying track, the conveying is stopped;

[0066] S2. The longitudinal telescopic component 2 drives the top frame body 3 to extend downward. After reaching the fixed extension position, it drives the pre-pressure clamp to move horizontally, so that the two clamp plates 8 approach the middle terminal 16 at the upper end of the battery 15 and clamp the middle terminal 16.

[0067] S3. Turn on the temperature testing component and use the infrared detector to identify the temperature value of the intermediate pole 16;

[0068] When the temperature value is within the set process temperature range, proceed to the next step;

[0069] When the temperature value exceeds the upper limit of the set process temperature range, remove the battery 15 and let it cool. Repeat step S3 after cooling.

[0070] When the temperature value is lower than the lower limit of the set process temperature range, the semiconductor heating element 10 is powered on by the power supply 5 and heats the intermediate electrode 16 until the temperature value is within the set process temperature range, and then proceeds to the next step.

[0071] S4. Turn on the resistance test assembly, provide a constant current to the pre-pressure solder joint 11 through the resistance tester 13, and test the resistance value of the intermediate pole 16.

[0072] When the resistance test value is within the set process resistance range, the resistance test value meets the standard, and the battery 15 is moved to the through-wall welding station.

[0073] When the resistance test value is outside the set process resistance range, the resistance test value is not up to standard, and battery 15 is rejected.

[0074] The battery through-wall welding pretreatment method provided by this invention first transports the battery 15 from the conveyor rail to the pretreatment station area and closes the conveyor rail; the battery 15 remains stationary in the pretreatment station area. First, the longitudinal telescopic component 2 is driven to move the frame downward from the lower end of the fixed frame 1 until the clamp plate 8 below the frame and the intermediate pole 16 are on the same horizontal plane; then, the two horizontal telescopic components 7 are driven, and the horizontal telescopic components 7 drive the clamp plate 8 closer to the intermediate pole 16 until the pre-pressed welding point 11 on the inner side of the clamp plate 8 is attached to the outer wall of the intermediate pole 16; thereafter, temperature testing and resistance testing can be performed in sequence.

[0075] During the temperature test, there are three possible scenarios for the intermediate terminal 16: First, if the temperature of the intermediate terminal 16 is within the set process temperature range, the temperature test is successful and the next step of resistance testing begins. Second, if the temperature of the intermediate terminal 16 is less than the lower limit of the set process temperature range, the temperature test fails. In this case, the first controller 4 needs to turn on the power supply 5, which drives the semiconductor heating elements located on both sides of the intermediate terminal 16 to start heating. The semiconductor heating elements heat the intermediate terminal 16 until the set temperature is reached. Then, the temperature test is successful and the next step of resistance testing begins. Third, if the temperature of the intermediate terminal 16 is greater than the upper limit of the set process temperature range, the temperature test fails. The battery 15 located on the track is rejected and transported to one side of the pre-processing station area for static cooling. After static cooling, it enters the pre-processing station area again, and the above three scenarios are repeated.

[0076] During the resistance test, there are two possible scenarios for the intermediate electrode 16: First, if the resistance value of the intermediate electrode 16 is less than the set process resistance range, the resistance test is passed, and the qualified product is conveyed to the through-wall welding station. Second, if the resistance value of the intermediate electrode 16 is greater than the upper limit of the process resistance range, the resistance test fails, and the unqualified product must be rejected for rework, while the second controller 12 activates an alarm. Third, if the resistance value of the intermediate electrode 16 is less than the lower limit of the process resistance range, the resistance test fails, and the unqualified product must be rejected for rework, while the second controller 12 activates an alarm.

[0077] Adding a pretreatment process before through-wall welding allows for the early detection and adjustment of the temperature of the intermediate terminal 16 to the process temperature range set for through-wall welding. Furthermore, resistance testing can be used to eliminate unqualified batteries 15, thereby reducing quality defects in through-wall welding and improving its efficiency and welding stability.

[0078] In some possible embodiments, please refer to Figure 1In step S3, a first alarm system is provided, which is activated when the temperature value is greater than the upper limit of the set process temperature range. In step S4, a second alarm system is provided, which is activated when the resistance test value is outside the set process resistance range.

[0079] When the temperature value exceeds the upper limit of the set process temperature range, the temperature detection fails. In this case, the first alarm system needs to be activated, and battery 15 needs to be removed and transported to one side for cooling. Adding the first alarm system can remind the staff to perform manual assistance.

[0080] When the resistance value is outside the set process resistance range, the resistance test fails, and the second alarm system needs to be activated, and battery 15 needs to be rejected for rework. Adding a second alarm system allows staff to reject battery 15 for rework.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A battery through-wall welding pretreatment equipment, characterized in that, include: A frame, which is located above the battery transport track and has longitudinal freedom; The pre-compression clamp includes two horizontally movable clamp plates (8) located below the frame, the two clamp plates (8) being arranged opposite each other and used to clamp the two sides of the intermediate pole (16); The temperature testing assembly includes a semiconductor heating element (10) and an infrared detector (9) spaced from bottom to top on the working surface of the clamp plate (8). The semiconductor heating element (10) is connected to a power supply (5) and used to heat the intermediate electrode (16). The infrared detector (9) is used to identify the temperature of the intermediate electrode (16). The resistance testing assembly includes a pre-pressed solder joint (11) on the working surface of the clamp plate (8) and a resistance tester (13) on the frame. The pre-pressed solder joint (11) is located on one side of the semiconductor heating element (10), and the pre-pressed solder joint (11) abuts against both sides of the intermediate electrode (16) by means of the clamp plate (8). The resistance tester (13) is connected to the pre-pressed solder joint (11) and is used to test the resistance value of the intermediate electrode (16).

2. The battery through-wall welding pretreatment equipment as described in claim 1, characterized in that, When the intermediate pole post (16) is in the clamping state, the pre-compression distance between the two clamp plates (8) is less than 1 / 2 of the through-wall welding closure distance.

3. The battery through-wall welding pretreatment equipment as described in claim 1, characterized in that, The semiconductor heating element (10) has a ring structure, and the pre-pressed solder joint (11) is a cylinder. The pre-pressed solder joint (11) is located inside the semiconductor heating element (10), and the inner diameter of the semiconductor heating element (10) is the same as the outer diameter of the pre-pressed solder joint (11).

4. The battery through-wall welding pretreatment equipment as described in claim 3, characterized in that, The thickness of the semiconductor heating element (10) is less than the thickness of the pre-pressed solder joint (11), and the working surface of the semiconductor heating element (10) is spaced apart from the intermediate electrode post (16).

5. The battery through-wall welding pretreatment equipment as described in any one of claims 1-4, characterized in that, The temperature testing component also includes: A first controller (4) is mounted on the frame; the first controller (4) is electrically connected to the infrared detector (9) and the power supply (5); the first controller (4) includes a signal receiving module and a signal transmission module; the signal receiving module is used to receive the temperature signal emitted by the infrared detector (9); the signal transmission module is used to send a command signal to the power supply (5).

6. The battery through-wall welding pretreatment equipment as described in claim 1, characterized in that, The resistance testing assembly also includes: A second controller (12) is mounted on the frame; the second controller (12) is electrically connected to the resistance tester (13); An alarm (14) is mounted on the frame; the alarm (14) is electrically connected to the second controller (12).

7. The battery through-wall welding pretreatment equipment as described in claim 1, characterized in that, The frame includes: Top frame body (3), the top frame body (3) is located above the battery; Two extension arms (6) are symmetrically arranged on both sides of the top frame body (3) and extend downward; the inner side of each of the two extension arms (6) is provided with a horizontal telescopic member (7), and the free ends of the two horizontal telescopic members (7) are respectively connected to the back side of the two clamps (8).

8. The battery through-wall welding pretreatment equipment as described in claim 7, characterized in that, Also includes: The fixed frame (1) is located below the top frame body (3); The longitudinal telescopic member (2) has its fixed end connected to the bottom end of the fixed frame (1) and its free end connected to the top end of the top frame body (3).

9. A pretreatment method for through-wall welding of a storage battery, characterized in that, The battery through-wall welding pretreatment equipment as described in claim 8 includes the following steps: S1. When the battery (15) moves to the pre-processing station of the conveying track, stop conveying; S2. The longitudinal telescopic component (2) drives the top frame body (3) to extend downward. After reaching the fixed extension position, it drives the pre-pressure clamp to move horizontally, so that the two clamp plates (8) approach the middle terminal (16) at the upper end of the battery (15) and clamp the middle terminal (16). S3. Turn on the temperature testing component and identify the temperature value of the intermediate pole (16) using an infrared detector; When the temperature value is within the set process temperature range, proceed to the next step; When the temperature value exceeds the upper limit of the set process temperature range, remove the battery and let it cool. Repeat step S3 after cooling. When the temperature value is less than the lower limit of the set process temperature range, the semiconductor heating element (10) is powered on (5) and heats the intermediate electrode (16) until the temperature value is within the set process temperature range, and then proceeds to the next step. S4. Turn on the resistance test assembly, provide a constant current to the pre-pressed solder joint (11) through the resistance tester (13), and test the resistance value of the intermediate pole (16); When the resistance test value is within the set process resistance range, the resistance test value meets the standard, and the battery (15) is transferred to the through-wall welding station. When the resistance test value is outside the set process resistance range, the resistance test value is not up to standard, and the battery (15) is rejected.

10. The pretreatment method for through-wall welding of a storage battery as described in claim 9, characterized in that, In step S3, a first alarm system is provided, which is activated when the temperature value is greater than the upper limit of the set process temperature range; in step S4, a second alarm system is provided, which is activated when the resistance test value is outside the set process resistance range.

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