Battery pole reliability detection equipment for battery manufacturing

Abstract

The invention discloses battery pole reliability detection equipment for battery manufacturing, and belongs to the technical field of battery detection, the battery pole reliability detection equipment comprises a test board and a simulation battery holder for placing a battery cover plate, and the top end of the test board is fixedly connected with two symmetrical electrolyte tanks. Through the arrangement of the exchange assembly, mixed gas in the simulation gas box and electrolyte in the electrolyte box can be continuously pressed into the simulation battery holder through the rotation of two gas exchange gears and two electrolyte exchange gears, and the state that a pole of a battery cover plate is eroded by the electrolyte in the daily use process is simulated; meanwhile, the arrangement of a sealing cover and an arc protection assembly can utilize an air pressure sensor to monitor the air pressure of the sealing cover so as to judge whether the battery cover plate pole is broken down by high voltage or not, and control a hinge guide rod to be safely separated after the pole is broken down by high voltage, so that the reliability of a subsequent test result is ensured. And the safety of the whole test equipment in the high-voltage circuit test is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of battery detection, and in particular to a battery pole reliability detection device for battery manufacturing. Background Art

[0002] The power battery is the power source that provides power for the tool. The power battery pack will be packaged through a battery cover during manufacturing. The positive and negative poles set on the battery cover are responsible for the positive and negative connections of the battery pack respectively. The positive pole is electrically conductive with the top cover sheet, while the negative pole is electrically insulated from the top cover sheet to prevent short circuit.

[0003] During the production of the cover plate and pole of the power battery, the external insulation of the pole will be integrated. The power battery will generate heat during the daily charging and discharging process, resulting in increased internal pressure. If the explosion-proof valve cannot release the pressure in time, the internal high pressure will press on the cover and pole, resulting in physical damage to the cover and pole, thereby causing voltage breakdown. The high temperature in this process will also cause the performance of the insulating material to deteriorate, increasing the risk of voltage breakdown. At the same time, when excessive current flows through the pole during the use of the power battery, if the conductivity and heat dissipation capacity of the pole are insufficient, it may also cause local high temperature, and then cause breakdown, causing safety problems in the use of the battery. Therefore, it is necessary to ensure the reliability of the dielectric strength of the insulating material of the pole in various states. The positive and negative poles of the battery are in direct contact with the electrolyte and are responsible for current conduction. Therefore, they need to have good conductivity and corrosion resistance to ensure the reliability of the battery. Based on the above, a battery pole reliability detection device for battery manufacturing is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem of battery breakdown caused by battery use in the prior art, which may cause safety problems in battery use. Therefore, it is necessary to ensure the reliability of the dielectric strength of the insulating material of the pole under various conditions, and the positive and negative poles of the battery are in direct contact with the electrolyte and are responsible for current conduction. Therefore, they need to have good conductivity and corrosion resistance to ensure the reliability of battery use. A battery pole reliability detection device for battery manufacturing is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A battery pole reliability testing device for battery manufacturing, comprising a test bench and a simulated battery seat for placing a battery cover, wherein two mutually symmetrical electrolyte tanks are fixedly connected to the top of the test bench, a simulated gas tank is fixedly connected to the top of the electrolyte tank, a driving motor is arranged on one side of the electrolyte tank, and the driving motor is connected to an exchange component for conveying liquid inside the electrolyte tank and gas inside the simulated gas tank through a driving gear, a heating ring cover is arranged on one side of the exchange component, and a heat soaking component for heating the temperature inside the simulated battery seat is arranged inside the heating ring cover; The top of the test bench is fixedly connected with a fixed seat through two struts. The bottom end of the fixed seat is respectively connected with two sealing covers through two hydraulic cylinders. A safety box is arranged between the two sealing covers. The top of the safety box is fixedly connected with a universal test meter through a fixing plate. The bottom end of the fixing plate is fixedly connected with an arc-proof component for power-off protection.

[0006] Preferably, an installation groove adapted to the battery cover plate is formed at the top end of the simulated battery seat. The top end of the test bench is fixedly connected with the bottom end of the simulated battery seat. A plurality of test power supplies are fixedly connected to the top end of the test bench. Two electrical conduction columns are fixedly connected to the inner end face of the simulated battery seat. The test power supplies are electrically connected to the electrical conduction columns.

[0007] Preferably, a protective cover for protecting the explosion-proof valve of the battery cover plate is fixedly connected to the inner end face of the simulated battery seat through a fixing rod. A sealing rubber ring is fixedly connected to the outer side wall of the top end of the protective cover.

[0008] Preferably, the exchange component is composed of two air exchange gears and two liquid exchange gears. The top end of the test bench is fixedly connected with a driving motor. The output end of the driving motor is fixedly connected with the bottom end of a driving gear through a driving shaft. The driving gear is meshed with one of the air exchange gears. The two air exchange gears are meshed with each other. The two liquid exchange gears are meshed with each other.

[0009] Preferably, two exchange boxes are fixedly connected to the outer side wall of the simulated battery seat. An arc-shaped groove is formed in the side wall of the upper exchange box close to the driving gear to facilitate the meshing rotation of the driving gear and the air exchange gear. The inner side wall of the upper exchange box is rotationally connected with the air exchange gear. The inner side wall of the lower exchange box is rotationally connected with the liquid exchange gear. The bottom end of the air exchange gear is fixedly connected with the top end of the liquid exchange gear through a rotating shaft.

[0010] Preferably, the electrolyte tank is communicated with the inside of the simulated battery seat through a pipeline and the lower exchange box. The simulated gas tank is communicated with the heating ring cover through a pipeline and the upper exchange box. An electrolyte is arranged in the electrolyte tank. A mixed gas composed of hydrogen, oxygen and carbon dioxide is arranged in the simulated gas tank.

[0011] Preferably, the heat equalizing component is composed of an impeller part and a plurality of electric heating mesh covers. The inner end face of the heating ring cover is rotationally connected with the impeller part. A plurality of exhaust holes are formed in the outer side wall of the heating ring cover. The inner side wall of the exhaust hole is fixedly connected with the electric heating mesh cover.

[0012] Preferably, a test guide post for electrically connecting with the pole column of the battery cover plate is fixedly connected to the bottom end of the hydraulic cylinder. A pressure sensor is fixedly connected to the sealing cover. The side wall of the test guide post is electrically connected with a transfer guide plate.

[0013] Preferably, the arc-proof component is composed of a two-way hydraulic push rod and two partition plates. Hinge guide rods are rotatably connected to the opposite side walls of the universal test meter. Torsion springs are arranged on the pin shafts of the hinge guide rods. The output end of the two-way hydraulic push rod is fixedly connected to the partition plate. Insulating oil is arranged in the safety box, and the partition plate is made of ceramic material.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Through the setting of the exchange component in this solution, the electrolyte can be injected synchronously by the liquid-changing gear, the mixed gas can be pressurized by the gas-changing gear ( ), and the electric heating mesh cover generates high temperature, accurately reproducing the electrolyte erosion and high-temperature and high-pressure environment of the battery pole column under real working conditions, ensuring that the test environment is highly consistent with the daily use scenario, and realizing the multi-factor coupling simulation.

[0015] 2. Through the setting of the sealing cover and the arc-proof component in this solution, the hydraulic drive can be used to form redundant sealing between the sealing cover and the protective cover through the sealing rubber ring, preventing the explosion-proof valve from being damaged during the high-pressure test. The ceramic partition plate cooperates with the insulating oil to achieve rapid physical isolation of the high-voltage circuit, effectively avoiding the arc risk.

[0016] 3. Through the setting of the test guide post and the protective cover in this solution, the test guide post and the sealing cover can be pressed down to limit the battery cover plate, and the explosion-proof valve of the battery cover plate can be protected during the process of limiting and pressing, and at the same time, the circuit inside and outside the pole column of the battery cover plate can be built, facilitating the subsequent detection of various performances of the battery pole column.

[0017] 4. Through the three-level linkage mechanism of the two-way hydraulic push rod, the hinge guide rod and the partition plate in this solution, the preventive failure protection design is realized. When a breakdown event is detected, the physical isolation of the circuit is completed in a short time, ensuring the safety of the equipment body and realizing the fault self-processing safety chain. Brief Description of the Drawings

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the battery pole column reliability detection equipment for battery manufacturing proposed by the present invention; Figure 2 It is an assembly drawing of the battery pole column reliability detection equipment for battery manufacturing proposed by the present invention; Figure 3 It is Figure 2 The enlarged view at A in Figure 4 It is Figure 2 The enlarged view at B in Figure 5 It is a structural schematic diagram of the position of the heating ring cover in the battery pole column reliability detection equipment for battery manufacturing proposed by the present invention; Figure 6Schematic diagram of the structure of the exchange component in the battery pole reliability detection device for battery manufacturing proposed by the present invention; Figure 7 Schematic diagram of the structure inside the safety box in the battery pole reliability detection device for battery manufacturing proposed by the present invention; Figure 8 Schematic diagram of the structure of the anti-arc component in the battery pole reliability detection device for battery manufacturing proposed by the present invention.

[0019] In the figure: 1, test bench; 2, simulated battery seat; 3, battery cover plate; 4, test power supply; 5, electrolyte tank; 6, simulated gas tank; 7, drive motor; 8, drive gear; 9, ventilation gear; 10, liquid change gear; 11, exchange box; 12, heating ring cover; 13, impeller part; 14, electric heating mesh cover; 15, protective cover; 16, sealing rubber ring; 17, conducting column; 18, fixed seat; 19, hydraulic cylinder; 20, test guide column; 21, sealing cover; 22, air pressure sensor; 23, transfer guide plate; 24, safety box; 25, universal test meter; 26, hinge guide rod; 27, double-acting hydraulic push rod; 28, partition board. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, terms such as "installation", "provided with", "sheathed / connected", "connection", etc. should be understood in a broad sense. For example, "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] Example, referring to Figures 1 to 8 A battery pole reliability detection device for battery manufacturing includes a test bench 1 and a simulated battery seat 2 for placing a battery cover plate 3; Further, an installation groove adapted to the battery cover plate 3 is provided at the top end of the simulated battery holder 2. The top end of the test bench 1 is fixedly connected to the bottom end of the simulated battery holder 2. A plurality of test power supplies 4 are fixedly connected to the top end of the test bench 1. Two electrical conduction columns 17 are fixedly connected to the inner end surface of the simulated battery holder 2. The test power supply 4 is electrically connected to the electrical conduction column 17. A protective cover 15 for protecting the explosion-proof valve of the battery cover plate 3 is fixedly connected to the inner end surface of the simulated battery holder 2 through a fixing rod. A sealing rubber ring 16 is fixedly connected to the outer side wall of the top end of the protective cover 15; It should be noted that: the front side of the battery cover plate 3 of the battery pole to be tested is placed face up and fitted in the installation groove on the simulated battery holder 2. Subsequently, the two hydraulic cylinders 19 at the bottom end of the fixing seat 18 are started synchronously, and the test guide post 20 and the sealing cover 21 connected to the output end of the hydraulic cylinder 19 are pushed down, so that the test guide post 20 is butted against the battery pole on the battery cover plate 3, and the sealing cover 21 is pressed tightly on the battery cover plate 3, so that the bottom end of the battery cover plate 3 is pressed tightly on the protective cover 15 (the sealing rubber ring 16 is pressed and deformed, realizing the sealing of the liquid injection hole and the explosion-proof valve on the bottom end of the battery cover plate 3 by the protective cover 15, and avoiding damage to the explosion-proof valve during the subsequent high air pressure detection process), and the bottom end of the battery pole of the battery cover plate 3 is pressed tightly and butted against the electrical conduction column 17; The benefits based on the above are as follows: in this way, the downward pressure of the test guide post 20 and the sealing cover 21 can be used to realize the limit of the battery cover plate 3, and the explosion-proof valve of the battery cover plate 3 can be protected during the limit pressing process, and at the same time, the circuit inside and outside the battery pole of the battery cover plate 3 can be built, which is convenient for subsequent detection of various performances of the battery pole; Two symmetrically arranged electrolyte tanks 5 are fixedly connected to the top end of the test bench 1. A simulated gas tank 6 is fixedly connected to the top end of the electrolyte tank 5. A driving motor 7 is arranged on one side of the electrolyte tank 5. The driving motor 7 is connected to an exchange component for transporting the liquid inside the electrolyte tank 5 and the gas inside the simulated gas tank 6 through a driving gear 8. A heating ring cover 12 is arranged on one side of the exchange component. A heat equalizing component for heating the temperature inside the simulated battery holder 2 is arranged inside the heating ring cover 12; Further, the exchange component is composed of two air exchange gears 9 and two liquid exchange gears 10. The top end of the test bench 1 is fixedly connected to the driving motor 7. The output end of the driving motor 7 is fixedly connected to the bottom end of the driving gear 8 through a driving shaft. The driving gear 8 meshes with one of the air exchange gears 9. The two air exchange gears 9 mesh with each other, and the two liquid exchange gears 10 mesh with each other. Two exchange boxes 11 are fixedly connected to the outer side wall of the simulated battery holder 2. An arc-shaped groove is formed on the side wall of the upper exchange box 11 close to the driving gear 8, which is convenient for the meshing rotation of the driving gear 8 and the air exchange gear 9. The inner side wall of the upper exchange box 11 is rotationally connected to the air exchange gear 9, and the inner side wall of the lower exchange box 11 is rotationally connected to the liquid exchange gear 10. The bottom end of the air exchange gear 9 is fixedly connected to the top end of the liquid exchange gear 10 through a rotating shaft. The electrolyte tank 5 is internally communicated with the simulated battery holder 2 through a pipeline and the lower exchange box 11. The simulated gas tank 6 is communicated with the heating ring cover 12 through a pipeline and the upper exchange box 11. An electrolyte is provided in the electrolyte tank 5, and a mixed gas composed of hydrogen, oxygen, and carbon dioxide is provided in the simulated gas tank 6. The heat equalizing component is composed of an impeller member 13 and a plurality of electric heating mesh covers 14. The inner end face of the heating ring cover 12 is rotationally connected to the impeller member 13. A plurality of exhaust holes are formed on the outer side wall of the heating ring cover 12, and the inner side wall of the exhaust hole is fixedly connected to the electric heating mesh cover 14; It should be particularly noted that: The mixed gas in the simulated gas tank 6 is mainly used to simulate gases such as hydrogen, oxygen, and carbon dioxide generated by the high-temperature decomposition of the electrolyte during daily use. The concentration ratio of hydrogen, oxygen, and carbon dioxide in the mixed gas is modulated according to the concentration ratio of the battery electrolyte decomposition. The heating temperature of the electric heating mesh cover 14 is controlled at the high-temperature state of the battery during daily use to ensure the safety of the simulated state of high temperature and high pressure; It should be noted that: when performing the test, the driving motors 7 on both sides are started synchronously to drive the driving gears 8 to rotate slowly through the driving shafts. The rotation of the driving gears 8 will drive the two ventilation gears 9 to rotate slowly in the opposite direction. The two ventilation gears 9 will respectively drive the two fluid changing gears 10 to rotate slowly in the opposite direction through the two rotating shafts. Then, in the process of mutual meshing and rotation, the two fluid changing gears 10 will continuously press the electrolyte in the electrolyte tank 5 into the simulated battery holder 2 through the teeth of the meshing and rotating fluid changing gears 10, so that the bottom end of the pole of the battery cover 3 is continuously immersed in the electrolyte (it should be noted that a certain amount of electrolyte was originally provided in the simulated battery holder 2, and the subsequently pressed electrolyte is used to simulate the state of the change of the contact surface of the pole of the battery cover 3 when encountering bumps during the driving of the vehicle, to ensure that all parts below the battery pole are simulated. Erosion), at the same time, the two meshing ventilation gears 9 rotate, The mixed gas is continuously pressed and transported between the meshing teeth, and the mixed gas in the simulated gas box 6 is continuously pressed into the heating ring cover 12. After the gas is pressed into the heating ring cover 12, it will drive the impeller member 13 to rotate, so that the mixed gas passes through the electric heating mesh cover 14 for heating, and then enters the upper space of the simulated battery seat 2. The rotation of the impeller member 13 makes the mixed gas have a certain outward rotation kinetic energy after heating, and is quickly and evenly distributed throughout the simulated battery seat 2, thereby simulating the high temperature and high pressure environment of the battery pole of the battery cover 3 during daily use (hydrogen, oxygen and carbon dioxide in the mixed gas are the main gases produced by the decomposition of the electrolyte during the daily use of the battery, ensuring that the high-voltage simulation is more in line with the daily use environment of the battery pole). After the mixed gas is heated, it is dispersed to the surroundings, which makes it easier for the battery pole to be quickly affected by the high temperature, and also avoids the decomposition and destruction of the electrolyte caused by direct heating of the electrolyte; The above advantages are as follows: in this way, the mixed gas in the simulated gas box 6 and the electrolyte in the electrolyte box 5 can be continuously pressed into the simulated battery holder 2 by the rotation of the two gas exchange gears 9 and the two liquid exchange gears 10, so as to simulate the state in which the pole of the battery cover plate 3 is corroded by the electrolyte during daily use, and the high temperature and high pressure occur, so that the simulation of the state to be tested of the pole of the battery cover plate 3 is more in line with the situation in daily use, thereby ensuring the reliability of the subsequent test results; The top of the test bench 1 is fixedly connected to a fixing seat 18 through two pillars, the bottom of the fixing seat 18 is respectively connected to two sealing covers 21 through two hydraulic cylinders 19, a safety box 24 is arranged between the two sealing covers 21, the top of the safety box 24 is fixedly connected to a multimeter 25 through a fixing plate, and the bottom of the fixing plate is fixedly connected to an arc protection component for power-off protection; Furthermore, a test guide post 20 for electrically connecting with the pole column of the battery cover plate 3 is fixedly connected to the bottom end of the hydraulic cylinder 19. A pressure sensor 22 is fixedly connected to the sealing cover 21. A transfer guide plate 23 is electrically connected to the side wall of the test guide post 20. The arc-proof component consists of a two-way hydraulic push rod 27 and two partition plates 28. Hinge guide rods 26 are rotatably connected to opposite side walls of the universal test meter 25. A torsion spring is arranged on the pin shaft of the hinge guide rod 26. The output end of the two-way hydraulic push rod 27 is fixedly connected to the partition plate 28. Insulating oil is arranged in the safety box 24. The partition plate 28 is made of ceramic material; It should be noted that after the above simulation state is completed, the test power supply 4 externally is connected to the electrical conductivity column 17 to conduct electricity, and then the two test guide posts 20 are electrified through the positive and negative pole columns of the battery cover plate 3, so that the transfer guide plates 23 on both sides of the universal test meter 25 are powered on. Under the action of the torsion spring, the hinge guide rods 26 on both sides of the universal test meter 25 will be pressed against the transfer guide plate 23, realizing the electrical connection of the universal test meter 25 to the circuit. By measuring the voltage and current of the circuit with the universal test meter 25, the energized state of the pole column of the battery cover plate 3 under the erosion of the electrolyte and the high-temperature and high-pressure environment is judged. If the current and voltage measured by the universal test meter 25 change, it indicates that the battery pole column is eroded by the electrolyte, which may lead to an increase in internal resistance, and further indicates that the detection of the pole column of the battery cover plate 3 is unqualified in this state. If the pole column of the battery cover plate 3 passes the detection in this state, then the test power supply 4 is controlled to output a continuously increasing high-voltage current to simulate the high-voltage situation encountered during the use of the power battery. If the dielectric strength of the insulating material around the pole column of the battery cover plate 3 is insufficient, the insulating material will be broken down by the high voltage. During the breakdown process, the flow of charges in the insulating material generates high temperature, causing the insulating material to be damaged. As a result, the high-pressure gas in the simulated battery seat 2 leaks into the sealing cover 21, causing the pressure sensor 22 to detect a change in pressure, transmit a signal to judge the test result, and feedback the signal to the external controller to control the start of the two-way hydraulic push rod 27. When the two-way hydraulic push rod 27 starts, it will simultaneously push the two partition plates 28, causing the hinge guide rod 26 to separate from the transfer guide plate 23 under the push of the partition plate 28. The ceramic partition plate 28 performs the pushing and separating operation in the insulating oil of the safety box 24, making it difficult to break down the insulating oil during the separation process of the hinge guide rod 26 and the transfer guide plate 23. After the separation is completed, the ceramic partition plate 28 will completely block the electrical connection between the hinge guide rod 26 and the transfer guide plate 23 in the insulating oil, avoiding the generation of electric arcs caused by the separation of the hinge guide rod 26 and the transfer guide plate 23 in the high-voltage circuit, and ensuring the safety protection of the entire test equipment when the pole column of the battery cover plate 3 is broken down by high voltage; The above-mentioned benefits are as follows: the air pressure sensor 22 can be used to monitor the air pressure of the sealing cover 21, determine whether the battery cover 3 pole column is broken down by high voltage for detection, and control the hinge guide rod 26 to separate safely after the pole column is broken down by high voltage, ensuring the safety of the entire testing equipment during the high-voltage circuit test; When the present invention is in use, the battery cover 3 of the battery pole column to be tested is placed face up and fitted in the installation groove on the simulated battery seat 2. Subsequently, two hydraulic cylinders 19 at the bottom of the fixed seat 18 are started synchronously, and the test guide post 20 and the sealing cover 21 connected to the output end of the hydraulic cylinder 19 are pushed down, so that the test guide post 20 is butted against the battery pole column on the battery cover 3, and the sealing cover 21 is pressed tightly on the battery cover 3, so that the bottom end of the battery cover 3 is pressed tightly on the protective cover 15 (the sealing rubber ring 16 is pressed and deformed, realizing the sealing of the liquid injection hole and the explosion-proof valve on the bottom end of the battery cover 3 by the protective cover 15, and avoiding damage to the explosion-proof valve during the subsequent high air pressure detection process), and the bottom end of the battery pole column of the battery cover 3 is pressed tightly and butted against the conduction guide post 17. In this way, the pressing down of the test guide post 20 and the sealing cover 21 can be used to limit the battery cover 3, and the explosion-proof valve of the battery cover 3 can be protected during the limiting and pressing process, and at the same time, the circuit inside and outside the battery cover 3 pole column can be built, facilitating the subsequent detection of various performances of the battery pole column; During the detection, the driving motors 7 on both sides are started synchronously to drive the driving gears 8 to rotate slowly through the driving shafts. The rotation of the driving gears 8 will drive the two ventilation gears 9 to rotate slowly in the opposite direction. The two ventilation gears 9 will respectively drive the two liquid changing gears 10 to rotate slowly in the opposite direction through the two rotating shafts. Then, in the process of mutual meshing and rotation, the two liquid changing gears 10 will continuously press the electrolyte in the electrolyte tank 5 into the simulated battery seat 2 through the teeth of the meshing and rotating liquid changing gears 10, so that the bottom end of the pole of the battery cover 3 is continuously immersed in the electrolyte. At the same time, the two meshing ventilation gears 9 rotate, so that the mixed gas is continuously pressed and transported between the meshing teeth, and the mixed gas in the simulated gas box 6 is continuously pressed into the heating ring cover 12. After the gas is pressed into the heating ring cover 12, it will drive the impeller part 13 to rotate, so that the mixed gas passes through the electric heating mesh cover 14 for heating, and then enters the upper space of the simulated battery seat 2. The rotation of the impeller part 13 causes the mixed gas to be heated. It has a certain outward rotation kinetic energy, which is quickly and evenly distributed throughout the simulated battery seat 2, thereby simulating the high temperature and high pressure environment of the battery pole of the battery cover 3 during daily use (the hydrogen, oxygen and carbon dioxide in the mixed gas are the main gases produced by the decomposition of the electrolyte during the daily use of the battery, ensuring that the high-voltage simulation is more in line with the daily use environment of the battery pole), and the mixed gas is dispersed to the surroundings after heating, so that the battery pole is quickly affected by the high temperature, and the direct heating of the electrolyte is avoided to cause the decomposition and destruction of the electrolyte. In this way, the rotation of the two gas exchange gears 9 and the two liquid exchange gears 10 can be used to continuously press the mixed gas in the simulated gas box 6 and the electrolyte in the electrolyte box 5 into the simulated battery seat 2, simulating the state of the pole of the battery cover 3 being eroded by the electrolyte during daily use, and the occurrence of high temperature and high pressure, so that the simulation of the state of the pole of the battery cover 3 to be tested is more in line with the situation in daily use, ensuring the reliability of subsequent test results; After the above simulation state is completed, the conductivity column 17 is energized through an external test power supply 4, and then the two test guide columns 20 are energized through the positive and negative electrode columns of the battery cover plate 3, so that the transfer guide plates 23 on both sides of the universal test meter 25 are powered on. The hinge guide rods 26 on both sides of the universal test meter 25 will be pressed against the transfer guide plates 23 under the action of the torsion spring, realizing the electrical connection of the universal test meter 25 to the circuit. By measuring the voltage and current of the circuit with the universal test meter 25, the energized state of the electrode column of the battery cover plate 3 under the electrolyte erosion and high-temperature and high-pressure environment is judged. If the current and voltage measured by the universal test meter 25 change, it means that the battery electrode column is eroded by the electrolyte, which may lead to an increase in internal resistance, and further indicates that the detection of the electrode column of the battery cover plate 3 is unqualified in this state. If the electrode column of the battery cover plate 3 is qualified in this state, then the test power supply 4 is controlled to output a continuously increasing high-voltage current to simulate the high-voltage situation encountered by the power battery during use. If the dielectric strength of the insulating material around the electrode column of the battery cover plate 3 is insufficient, the insulating material will be broken down by the high voltage. During the breakdown process, the charge flow in the insulating material generates high temperature, causing the insulating material to be damaged, and further causing the high-pressure gas in the simulated battery holder 2 to leak into the sealing cover 21, so that the air pressure sensor 22 detects the air pressure change, transmits a signal to judge the detection result, and feeds back the signal to the external controller to control the start of the double-acting hydraulic push rod 27. When the double-acting hydraulic push rod 27 starts, it will synchronously push the two partition plates 28, so that the hinge guide rod 26 is separated from the transfer guide plate 23 under the push of the partition plate 28. The ceramic partition plate 28 performs the pushing and separating operation in the insulating oil of the safety box 24, so that the hinge guide rod 26 and the transfer guide plate 23 are not easily broken down the insulating oil during the separation process. After the separation is completed, the ceramic partition plate 28 will completely block the electrical connection between the hinge guide rod 26 and the transfer guide plate 23 in the insulating oil, avoiding the generation of electric arcs caused by the separation of the hinge guide rod 26 and the transfer guide plate 23 in the high-voltage circuit, and ensuring the safety protection of the entire test equipment when the electrode column of the battery cover plate 3 is broken down by high voltage. In this way, the air pressure sensor 22 can be used to monitor the air pressure of the sealing cover 21 to judge whether the electrode column of the battery cover plate 3 is broken down by high voltage for detection, and control the safe separation of the hinge guide rod 26 after the electrode column is broken down by high voltage, ensuring the safety of the entire test equipment during the high-voltage circuit test.

[0023] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A battery pole reliability testing device for battery manufacturing, comprising a test bench (1) and a simulated battery holder (2) for placing a battery cover (3), characterized in that: The top of the test bench (1) is fixedly connected to two symmetrical electrolyte tanks (5), the top of the electrolyte tank (5) is fixedly connected to a simulated gas tank (6), one side of the electrolyte tank (5) is provided with a drive motor (7), the drive motor (7) is connected to an exchange component for conveying liquid inside the electrolyte tank (5) and gas inside the simulated gas tank (6) via a drive gear (8), one side of the exchange component is provided with a heating ring cover (12), and a heat-saturating component for heating the temperature inside the simulated battery holder (2) is provided inside the heating ring cover (12); The top of the test bench (1) is fixedly connected to a fixing seat (18) via two pillars, the bottom of the fixing seat (18) is respectively connected to two sealing covers (21) via two hydraulic cylinders (19), a safety box (24) is arranged between the two sealing covers (21), the top of the safety box (24) is fixedly connected to a multimeter (25) via a fixing plate, and the bottom of the fixing plate is fixedly connected to an arc protection component for power-off protection.

2. The battery pole reliability testing equipment for battery manufacturing according to claim 1, characterized in that: The top of the simulated battery holder (2) is provided with a mounting groove adapted to the battery cover (3); the top of the test bench (1) is fixedly connected to the bottom of the simulated battery holder (2); the top of the test bench (1) is fixedly connected to a plurality of test power sources (4); the inner end surface of the simulated battery holder (2) is fixedly connected to two electrical connection posts (17); and the test power sources (4) are electrically connected to the electrical connection posts (17).

3. The battery pole reliability testing equipment for battery manufacturing according to claim 1, characterized in that: A protective cover (15) for protecting the explosion-proof valve of the battery cover (3) is fixedly connected to the inner end surface of the simulated battery seat (2) via a fixing rod, and a sealing rubber ring (16) is fixedly connected to the outer side wall of the top end of the protective cover (15).

4. The battery pole reliability testing device for battery manufacturing according to claim 1, characterized in that: The exchange assembly is composed of two air exchange gears (9) and two fluid exchange gears (10); the top of the test bench (1) is fixedly connected to the drive motor (7); the output end of the drive motor (7) is fixedly connected to the bottom end of the drive gear (8) via a drive shaft; the drive gear (8) is meshed with the air exchange gear (9) on one side; the two air exchange gears (9) are meshed with each other; and the two fluid exchange gears (10) are meshed with each other.

5. The battery pole reliability testing device for battery manufacturing according to claim 4, characterized in that: The outer wall of the simulated battery holder (2) is fixedly connected to two exchange boxes (11). The upper exchange box (11) is provided with an arc groove on the side wall close to the driving gear (8) to facilitate the meshing rotation of the driving gear (8) and the ventilation gear (9). The inner wall of the upper exchange box (11) is rotationally connected to the ventilation gear (9), and the inner wall of the lower exchange box (11) is rotationally connected to the fluid exchange gear (10). The bottom end of the ventilation gear (9) is fixedly connected to the top end of the fluid exchange gear (10) via a rotating shaft.

6. The battery pole reliability testing equipment for battery manufacturing according to claim 1, characterized in that: The electrolyte tank (5) is connected to the interior of the simulated battery holder (2) through a pipeline and an exchange box (11) below, and the simulated gas tank (6) is connected to the heating ring cover (12) through a pipeline and an exchange box (11) above. The electrolyte tank (5) contains electrolyte, and the simulated gas tank (6) contains a mixed gas composed of hydrogen, oxygen and carbon dioxide.

7. The battery pole reliability testing equipment for battery manufacturing according to claim 1, characterized in that: The heat equalizing component is composed of an impeller member (13) and a plurality of electric heating mesh covers (14); the inner end surface of the heating ring cover (12) is rotatably connected to the impeller member (13); the outer side wall of the heating ring cover (12) is provided with a plurality of exhaust holes; the inner side walls of the exhaust holes are fixedly connected to the electric heating mesh cover (14).

8. The battery pole reliability testing device for battery manufacturing according to claim 1, characterized in that: A test guide post (20) for electrically connecting to a pole of a battery cover plate (3) is fixedly connected to the bottom end of the hydraulic cylinder (19), an air pressure sensor (22) is fixedly connected to the sealing cover (21), and a transfer guide plate (23) is electrically connected to the side wall of the test guide post (20).

9. The battery pole reliability testing device for battery manufacturing according to claim 1, characterized in that: The arc protection assembly is composed of a bidirectional hydraulic push rod (27) and two baffle plates (28); two opposite side walls of the multimeter (25) are rotatably connected with hinge guide rods (26); a torsion spring is arranged on a pin shaft of the hinge guide rod (26); an output end of the bidirectional hydraulic push rod (27) is fixedly connected to the baffle plate (28); insulating oil is arranged in the safety box (24); and the baffle plate (28) is made of ceramic material.

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