Lithium battery cap anti-explosion pressure detection device

Abstract

The utility model discloses a kind of lithium battery cap anti-explosion pressure detection devices, comprising: support and manual hydraulic jack;Detection component includes: sleeve seat, sleeve seat is equipped with accommodating groove, the bottom wall of accommodating groove is embedded with sealing gasket;Conical pressure head is connected with the piston rod of manual hydraulic jack, conical pressure head is used to cooperate with sealing gasket and clamps lithium battery cap, conical pressure head is adapted to cooperate with lithium battery cap and form overflow chamber, sealing gasket and the bottom wall of accommodating groove are adapted to cooperate with lithium battery cap and form pressurizing chamber;Pressurizing component includes: liquid storage tank and liquid inlet pipeline, liquid inlet pipeline liquid storage tank and pressurizing chamber are interconnected;Pressure booster, pressure transmitter and solenoid valve, pressure booster, pressure transmitter and solenoid valve are arranged in liquid inlet pipeline.The lithium battery cap anti-explosion pressure detection device according to the utility model can control the pressure in pressurizing chamber with higher precision and less human error, and can more conveniently and accurately realize the anti-explosion pressure test of lithium battery cap.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, and in particular to a lithium battery cap explosion-proof pressure testing device. Background Technology

[0002] In related technologies, explosion-proof pressure testing of lithium battery caps mainly relies on traditional hydraulic testing equipment or pneumatic testing systems. Hydraulic testing equipment often uses manual pressurization, resulting in low pressure control accuracy, large testing errors, and the need for manual judgment of the pressure value at the moment of depressurization, leading to significant human error, poor sealing reliability, high testing errors, and cumbersome testing. Pneumatic testing methods suffer from poor pressure stability during testing and a high misjudgment rate, making explosion-proof pressure testing of lithium battery caps cumbersome, with low pressure control accuracy and poor sealing reliability, resulting in unsatisfactory testing results. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention provides a lithium battery cap explosion-proof pressure detection device. This device offers higher pressure control accuracy and more stable and reliable sealing, reduces manual operation, and enables convenient and accurate explosion-proof pressure testing of lithium battery caps, resulting in better testing performance.

[0004] The lithium battery cap explosion-proof pressure testing device according to this utility model includes: a bracket and a manual hydraulic jack, wherein the manual hydraulic jack is mounted on the bracket; a testing component, the testing component including: a sleeve seat, the sleeve seat having an upward-facing receiving groove, the bottom wall of the receiving groove being fitted with a sealing gasket, the sealing gasket extending in a ring shape along the circumference of the sleeve seat; and a conical pressure head, the conical pressure head being connected to the piston rod of the manual hydraulic jack and extending vertically into the receiving groove, the conical pressure head being used to contact the sealing gasket. The system includes a clamping mechanism for the lithium battery cap, wherein the conical pressure head is adapted to cooperate with the lithium battery cap to form an overflow cavity, the overflow cavity being connected to the receiving groove, and the sealing gasket and the bottom wall of the receiving groove being adapted to cooperate with the lithium battery cap to form a pressurizing cavity; a pressurizing assembly, comprising: a liquid storage tank and an inlet pipe, the liquid storage tank being disposed on the support, and the inlet pipe being connected to the liquid storage tank and the pressurizing cavity; a booster pump, a pressure transmitter, and a solenoid valve, the booster pump, the pressure transmitter, and the solenoid valve being disposed on the inlet pipe.

[0005] The lithium battery cap explosion-proof pressure testing device of this utility model uses a manual hydraulic jack to drive a conical pressure head to clamp the lithium battery cap with a sealing gasket, which improves the sealing stability and reliability of the pressure chamber. A booster pump draws oil from the storage tank into the pressure chamber for pressurization. A solenoid valve controls the inlet pipeline, and a pressure transmitter monitors the pressure in the pressure chamber in real time. This results in higher pressure control accuracy and less human error, enabling the lithium battery cap explosion-proof pressure testing device to more conveniently and accurately perform explosion-proof pressure testing on lithium battery caps with better testing results.

[0006] In some embodiments of this utility model, the bottom wall of the receiving tank is provided with a liquid inlet hole, which is connected to the pressurizing chamber. The liquid inlet pipeline includes: a first liquid inlet pipe, which is connected to the liquid inlet of the storage tank and the booster pump; a second liquid inlet pipe and a third liquid inlet pipe, wherein the second liquid inlet pipe is connected to the liquid outlet of the booster pump; the solenoid valve is disposed on the second liquid inlet pipe; the third liquid inlet pipe is connected to the bottom wall of the sleeve seat and communicates with the liquid inlet hole; the pressurizing assembly also includes a four-way connector, wherein the second liquid inlet pipe and the third liquid inlet pipe are connected through the four-way connector; and the pressure transmitter is disposed on the four-way connector.

[0007] In one embodiment of the present invention, the pressurizing assembly further includes a pressure gauge, which is disposed on the four-way connector.

[0008] In some embodiments of this utility model, the bottom wall of the receiving tank is provided with a return hole, and the pressurizing assembly further includes a return pipe. One end of the return pipe is connected to the liquid storage tank, and the other end of the return pipe is connected to the bottom wall of the sleeve seat and communicates with the return hole.

[0009] In some embodiments of this utility model, the conical pressure head includes: a main body and a pressure pipe portion, the pressure pipe portion extending along the vertical direction and connected to the main body portion, the lower end of the pressure pipe portion being adapted to abut against the periphery of the lithium battery cap, the pressure pipe portion and the main body portion being adapted to cooperate with the lithium battery cap to define the overflow cavity, and the side wall of the pressure pipe portion being provided with an overflow hole.

[0010] In one embodiment of this utility model, the crimping tube and the sealing gasket are arranged opposite each other in the vertical direction. The outer diameter of the sealing gasket is the same as the outer diameter of the crimping tube, the inner diameter of the sealing gasket is the same as the inner diameter of the crimping tube, and the axis of the sealing gasket is collinear with the axis of the crimping tube.

[0011] In some embodiments of this utility model, the outer periphery of the conical indenter is provided with an annular groove, the annular groove extends in annular shape along the circumference of the conical indenter, and the detection component further includes a sealing ring, the sealing ring being embedded in the annular groove and abutting against the inner peripheral wall of the receiving groove.

[0012] In some embodiments of this utility model, the opening of the receiving groove is provided with a chamfered structure.

[0013] In some embodiments of this utility model, the pressurization assembly further includes a control module, which is electrically connected to the solenoid valve, the pressure transmitter, and the booster pump.

[0014] In some embodiments of this utility model, the cylinder of the manual hydraulic jack is equipped with a hydraulic rod pressure gauge.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a lithium battery cap explosion-proof pressure detection device according to an embodiment of the present utility model; Figure 2 This is a partial schematic diagram of the explosion-proof pressure detection device for lithium battery caps according to an embodiment of the present utility model; Figure 3 This is a partial cross-sectional schematic diagram of the explosion-proof pressure detection device for lithium battery caps according to an embodiment of the present utility model; Figure 4 yes Figure 3 The diagram shows a magnified view of a portion at point A.

[0017] Figure label: 10. Support frame; 20. Manual hydraulic jack; 21. Piston rod; 22. Hydraulic rod pressure gauge; 30. Detection assembly; 301. Pressurization chamber; 302. Overflow chamber; 303. Sealing gasket; 304. Sealing ring; 31. Sleeve seat; 311. Receiving tank; 312. Liquid inlet; 313. Liquid return hole; 32. Conical pressure head; 321. Main body; 322. Pressure pipe section; 3221. Overflow hole; 40. Pressurization components; 41. Liquid storage tank; 42. Booster pump; 43. Four-way connector; 44. Pressure transmitter; 45. Pressure gauge; 46. Solenoid valve; 47. Liquid inlet pipe; 471. First liquid inlet pipe; 472. Second liquid inlet pipe; 473. Third liquid inlet pipe; 48. Liquid return pipe; 100. Explosion-proof pressure detection device for lithium battery caps; 200. Lithium battery caps. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0019] The following is for reference. Figures 1-4 Description of a lithium battery cap explosion-proof pressure detection device 100 according to an embodiment of the present utility model.

[0020] like Figures 1-4 As shown, the lithium battery cap explosion-proof pressure detection device 100 according to an embodiment of the present utility model includes: a bracket 10, a manual hydraulic jack 20, a detection component 30, and a pressurization component 40.

[0021] Specifically, the manual hydraulic jack 20 is mounted on the support 10; the detection assembly 30 includes: a sleeve seat 31 and a conical pressure head 32. The sleeve seat 31 has an upward-facing receiving groove 311, and a sealing gasket 303 is embedded in the bottom wall of the receiving groove 311. The sealing gasket 303 extends in a ring shape along the circumference of the sleeve seat 31; the conical pressure head 32 is connected to the piston rod 21 of the manual hydraulic jack 20, and extends along the vertical direction (e.g., ...). Figure 1 The cone-shaped pressure head 32 (shown in the up-down direction) extends into the receiving groove 311 and is used to cooperate with the sealing gasket 303 to clamp the lithium battery cap 200. The cone-shaped pressure head 32 is adapted to cooperate with the lithium battery cap 200 to form an overflow cavity 302, which is connected to the receiving groove 311. The sealing gasket 303 and the bottom wall of the receiving groove 311 are adapted to cooperate with the lithium battery cap 200 to form a pressurizing cavity 301. The pressurizing assembly 40 includes: a liquid storage tank 41 and an inlet pipe 47, a booster pump 42, a pressure transmitter 44, and a solenoid valve 46. The liquid storage tank 41 is located on the bracket 10, and the inlet pipe 47 connects the liquid storage tank 41 and the pressurizing cavity 301. The booster pump 42, the pressure transmitter 44, and the solenoid valve 46 are located on the inlet pipe 47.

[0022] In this embodiment, a bracket 10 is provided to facilitate the installation and arrangement of the manual hydraulic jack 20, the detection component 30, and the pressurizing component 40. The detection component 30 includes a sleeve seat 31 and a conical pressure head 32. The sleeve seat 31 is provided with a receiving groove 311, the opening of which faces upward. The conical pressure head 32 extends into the receiving groove 311 and cooperates with the sealing gasket 303 embedded in the bottom wall of the receiving groove 311 to clamp the lithium battery cap 200. The structure is simple, and the sealing gasket 303 can clamp the lithium battery cap 200. The cap 200 and the bottom wall of the receiving groove 311 provide a good seal. The sealing gasket 303 extends in an annular shape along the circumference of the sleeve seat 31. For example, the sealing gasket 303 can be an oil-resistant part. The upper end face of the sealing gasket 303 can abut against the circumference of the lower surface of the lithium battery cap 200. This can meet the sealing requirements between the lithium battery cap 200 and the bottom wall of the receiving groove 311, and facilitate the oil in the pressurization chamber 301 to act on the lithium battery cap 200 for explosion-proof pressure testing.

[0023] The conical pressure head 32 is connected to the piston rod 21 of the manual hydraulic jack 20 and extends vertically into the receiving groove 311. Exemplarily, the cylinder of the hydraulic jack can be manually positioned above the sleeve seat 31 and extend vertically. The piston rod 21 extends downwards from the sleeve and connects to the conical pressure head 32. After the lithium battery cap 200 is placed on the sealing gasket 303 of the receiving groove 311, the manual hydraulic jack 20 can hydraulically drive the piston rod 21 downwards under external force, thereby causing the conical pressure head 32 to extend downwards into the receiving groove 311 and engage with the sealing gasket 303. The manual hydraulic jack 20 provides a stable and reliable force for clamping and fixing the lithium battery cap 200, allowing the conical pressure head 32 to smoothly and reliably press and fix the lithium battery cap 200. This results in a more stable and reliable sealing effect in the pressurized cavity 301 formed by the lithium battery cap 200, the bottom wall of the receiving cavity, and the sealing gasket 303, combined with the sealing effect of the sealing gasket 303. This significantly reduces the probability of insufficient sealing affecting the detection accuracy, thus improving the detection accuracy of the lithium battery cap explosion-proof pressure detection device 100.

[0024] In this embodiment, the conical pressure head 32 and the lithium battery cap 200 cooperate to form an overflow cavity 302 that communicates with the receiving groove 311. When the lithium battery cap 200 breaks during the explosion-proof pressure test, the oil in the pressurized cavity 301 can flow into the overflow cavity 302 for temporary storage or flow into the receiving groove 311. This can effectively prevent oil splashing when the lithium battery cap 200 breaks, facilitate the cleaning of the lithium battery cap explosion-proof pressure testing device 100 after the test, and to a certain extent make the lithium battery cap explosion-proof pressure testing device 100 safer during the test.

[0025] The pressurization assembly 40 includes a storage tank 41 and an inlet pipe 47. The storage tank 41 stores oil for pressurization and supplies oil to the pressurization chamber 301. The inlet pipe 47 is connected to the storage tank 41 and the pressurization chamber 301. The booster pump 42, pressure transmitter 44, and solenoid valve 46 are located on the inlet pipe 47 and are arranged in a reasonable manner. During the testing operation of the lithium battery cap explosion-proof pressure detection device 100, the conical pressure head 32 presses the lithium battery cap 200 under the hydraulic drive of the manual hydraulic jack 20. The booster pump 42 can pump oil from the storage tank 41 to the pressurization chamber 301 and increase the oil pressure. The pressure transmitter 44 can detect the pressure in the pressurization chamber 301 in real time. The solenoid valve 46 can control the flow rate of the oil delivered to the pressurization chamber 301 and the opening and closing of the inlet pipe 47 as needed. When the pressure transmitter 44 detects that the pressure in the pressurization chamber 301 reaches the explosion-proof test pressure, the booster pump 42 stops and the solenoid valve 46 closes the inlet pipe 47, thereby performing the pressure holding explosion-proof test.

[0026] In this embodiment, a booster pump 42 is used to supply oil to the pressurizing chamber 301 for pressurization. The hydraulic pressurization is stable and reliable, and can achieve continuous, uniform and slow pressure increase in the pressurizing chamber 301. This allows for convenient and precise control of pressurization. Moreover, it is easier to seal than gas, making the pressure data during the test more accurate and reliable. The pressure transmitter 44 can detect the pressure in real time, making the pressure detection when the lithium battery cap 200 is opened more accurate. This effectively avoids data errors caused by manual judgment, further improving the accuracy of the detection data. As a result, the pressure control precision of the lithium battery cap explosion-proof pressure detection device 100 is higher, and the detection results are more accurate and reliable.

[0027] In this embodiment, when performing explosion-proof pressure testing, the lithium battery cap explosion-proof pressure testing device 100 only requires manual control of the manual hydraulic jack 20 to press the lithium battery cap 200 after the lithium battery cap 200 is placed in place. The pressure control in the pressurization chamber 301 can be automatically controlled and adjusted by the booster pump 42, the pressure transmitter 44, and the solenoid valve 46, which greatly reduces the steps of manual operation, making the explosion-proof pressure testing of the lithium battery cap 200 more convenient, faster, and more automated.

[0028] The lithium battery cap explosion-proof pressure testing device 100 according to this utility model embodiment uses a manual hydraulic jack 20 to drive a conical pressure head 32 to clamp the lithium battery cap 200 with a sealing gasket 303, thereby improving the sealing stability and reliability of the pressure chamber 301. A booster pump 42 draws oil from the storage tank 41 into the pressure chamber 301 for pressurization. A solenoid valve 46 controls the inlet pipeline 47. A pressure transmitter 44 monitors the pressure in the pressure chamber 301 in real time, resulting in higher pressure control accuracy and less human error. Thus, the lithium battery cap explosion-proof pressure testing device 100 can more conveniently and accurately perform explosion-proof pressure testing on the lithium battery cap 200, with better testing results.

[0029] In some embodiments of this utility model, reference is made to Figures 1-4 As shown, the bottom wall of the receiving tank 311 may be provided with a liquid inlet hole 312, which is connected to the pressurizing chamber 301. The liquid inlet pipe 47 may include: a first liquid inlet pipe 471, a second liquid inlet pipe 472 and a third liquid inlet pipe 473. The first liquid inlet pipe 471 is connected to the liquid inlet of the storage tank 41 and the booster pump 42. The second liquid inlet pipe 472 is connected to the liquid outlet of the booster pump 42. The solenoid valve 46 is located on the second liquid inlet pipe 472. The third liquid inlet pipe 473 is connected to the bottom wall of the sleeve seat 31 and is connected to the liquid inlet hole 312. The pressurizing assembly 40 also includes a four-way seat 43. The second liquid inlet pipe 472 and the third liquid inlet pipe 473 are connected through the four-way seat 43. The pressure transmitter 44 is located on the four-way seat 43.

[0030] In this embodiment, the bottom wall of the receiving tank 311 is provided with a liquid inlet hole 312 that communicates with the pressurizing chamber 301. The structure is simple and facilitates the connection between the liquid inlet pipe 47 and the pressurizing chamber 301. The liquid inlet hole 312 can penetrate the bottom wall of the receiving tank 311 in the vertical direction.

[0031] In this embodiment, the liquid inlet pipe 47 includes a first liquid inlet pipe 471, a second liquid inlet pipe 472, and a third liquid inlet pipe 473. The first liquid inlet pipe 471 connects the liquid storage tank 41 and the liquid inlet of the booster pump 42. The second liquid inlet pipe 472 connects the four-way connector 43 and the liquid outlet of the booster pump 42. The third liquid inlet pipe 473 connects the four-way connector 43 and the pressurization chamber 301. The structure is simple. The four-way connector 43 can meet the installation and use requirements of the pressure transmitter 44. For example, the four-way connector 43 can have four interfaces. The second liquid inlet pipe 472 and the third liquid inlet pipe 473 can be connected to the interfaces of the four-way connector 43 respectively, thereby forming a complete flow path. The pressure transmitter 44 can be installed on one interface of the four-way connector 43 to extend into the inner cavity of the four-way connector 43 for pressure detection.

[0032] In this embodiment, the solenoid valve 46 is installed on the second inlet pipe 472. The arrangement is reasonable and can effectively control the flow rate of the oil from the outlet of the booster pump 42 to the four-way seat 43 and the third inlet pipe 473. It also allows the pressure transmitter 44 to be located downstream of the fluid flow direction to meet the pressure detection requirements of the pressure transmitter 44 for the pressurization chamber 301.

[0033] In one embodiment of this utility model, such as Figure 2 As shown, the pressurization assembly 40 may also include a pressure gauge 45, which is disposed on the four-way connector 43.

[0034] In this embodiment, the pressurizing component 40 is also provided with a pressure gauge 45, which is disposed on the four-way connector 43. For example, the pressure gauge 45 can be installed on one interface of the four-way connector 43, and the measuring rod of the pressure gauge 45 can be sealed and extended into the cavity of the four-way connector 43 to detect the pressure.

[0035] In this embodiment, an additional pressure gauge 45 is provided to detect the pressure in the pressurization chamber 301. The pressure gauge 45 can directly read the pressure value, allowing the operator to compare the reading of the pressure gauge 45 with the pressure information detected by the pressure transmitter 44. Thus, the operator can intuitively verify whether the pressure information fed back by the pressure transmitter 44 is accurate based on the pressure gauge 45.

[0036] In some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the bottom wall of the receiving tank 311 may be provided with a return hole 313, and the pressurizing assembly 40 also includes a return pipe 48. One end of the return pipe 48 is connected to the storage tank 41, and the other end of the return pipe 48 is connected to the bottom wall of the sleeve seat 31 and communicates with the return hole 313.

[0037] In this embodiment, the bottom wall of the receiving tank 311 is provided with a return hole 313. The pressurizing component 40 is provided with a return pipe 48 connected to the storage tank 41 and the return hole 313. The structure is simple and can recover the oil flowing out of the overflow chamber 302 after the lithium battery cap 200 is broken, so that the oil can be recycled and the cleaning difficulty of the lithium battery cap explosion-proof pressure detection device 100 is reduced, making it easier to clean the lithium battery cap explosion-proof pressure detection device 100 after testing. For example, after the explosion-proof pressure test is completed, the oil in the pressurizing chamber 301 and the overflow chamber 302 can flow back to the storage tank 41 for storage along the return pipe 48.

[0038] In some embodiments of this utility model, such as Figure 3 and Figure 4As shown, the conical pressure head 32 may include a main body 321 and a pressure pipe 322. The pressure pipe 322 extends in the vertical direction and is connected to the main body 321. The lower end of the pressure pipe 322 is adapted to abut against the periphery of the lithium battery cap 200. The pressure pipe 322 and the main body 321 are adapted to cooperate with the lithium battery cap 200 to define an overflow cavity 302. The side wall of the pressure pipe 322 is provided with an overflow hole 3221.

[0039] In this embodiment, the conical pressure head 32 includes a main body 321 and a pressure pipe 322. The pressure pipe 322 extends in the vertical direction and is connected to the main body 321. For example, the upper end of the main body 321 is connected to the piston rod 21 of the manual hydraulic jack 20, and the lower end of the main body 321 can be a frustum shape with the outer diameter gradually decreasing downward, so that the conical pressure head 32 can smoothly extend downward into the receiving groove 311. The lower end of the pressure fitting 322 abuts against the periphery of the lithium battery cap 200 and cooperates with the main body 321 and the lithium battery cap 200 to define the overflow cavity 302. The structure is simple. The pressure fitting 322 can easily form an overflow cavity 302 with a large volume, which can stably contain the oil sprayed from the pressurization cavity 301. The side wall of the pressure fitting 322 is provided with an overflow hole 3221, so that when there is a lot of oil, it can flow out from the overflow hole 3221 into the receiving cavity in time, and then flow back into the storage tank 41 from the return hole 313. This avoids the oil from accumulating too much and being unable to be discharged, which may damage the conical pressure head 32 or cause safety hazards. This makes the lithium battery cap explosion-proof pressure detection device 100 more stable and safer during detection operations.

[0040] In one embodiment of this utility model, such as Figure 4 As shown, the crimping tube 322 and the sealing gasket 303 can be arranged facing each other in the vertical direction. The outer diameter of the sealing gasket 303 is the same as the outer diameter of the crimping tube 322, the inner diameter of the sealing gasket 303 is the same as the inner diameter of the crimping tube 322, and the axis of the sealing gasket 303 is collinear with the axis of the crimping tube 322.

[0041] In this embodiment, the crimping tube 322 and the sealing gasket 303 are arranged facing each other in the vertical direction. The arrangement is reasonable, so that the crimping tube 322 can cooperate with the sealing gasket 303 to stably and reliably clamp and fix the lithium battery cap 200 in the vertical direction.

[0042] The outer diameter of the sealing gasket 303 is the same as the outer diameter of the crimping tube 322, and the inner diameter of the sealing gasket 303 is the same as the inner diameter of the crimping tube 322. The axis of the sealing gasket 303 is collinear with the axis of the crimping tube 322, so that the downward pressure of the crimping tube 322 can be evenly distributed on the entire contact surface between the sealing gasket 303 and the lithium battery cap 200. This can effectively prevent the lithium battery cap 200 from deforming or being damaged due to local stress concentration, thereby significantly improving the sealing performance. The sealing gasket 303 can be stably deformed to achieve a sealing effect, thus making the sealing effect of the pressurized chamber 301 better.

[0043] In some embodiments of this utility model, reference is made to Figure 3 As shown, the outer periphery of the conical pressure head 32 may be provided with an annular groove, which extends in an annular shape along the circumference of the conical pressure head 32. The detection assembly 30 also includes a sealing ring 304, which is embedded in the annular groove and abuts against the inner peripheral wall of the receiving groove 311.

[0044] In this embodiment, an annular groove extending circumferentially is provided on the outer periphery of the conical pressure head 32. The sealing ring 304 is embedded in the annular groove and abuts against the inner peripheral wall of the receiving groove 311. The structure is simple. The sealing ring 304 can seal the receiving groove 311 in the vertical direction, thereby preventing the oil overflowing into the receiving groove 311 from splashing out of the receiving groove 311. This effectively reduces the pollution of the lithium battery cap explosion-proof pressure testing device 100 and the external environment by the oil during the testing process, making it easier to clean the lithium battery cap explosion-proof pressure testing device 100 after the test. In addition, the conical pressure head 32 abuts against the inner peripheral wall of the receiving groove 311 through the sealing ring 304, so that the inner peripheral wall of the receiving groove 311 can play a certain guiding role in the movement of the conical pressure head 32, so that the conical pressure head 32 can enter or move out of the receiving groove 311 more stably in the vertical direction, thereby making the operation of the lithium battery cap explosion-proof pressure testing device 100 more stable. For example, there can be multiple annular grooves, such as two, three, four, etc. Multiple annular grooves can be arranged at intervals in the vertical direction, and sealing rings 304 can be set accordingly. This can further improve the sealing effect of sealing rings 304 on receiving grooves 311, and better ensure hygiene during the testing process.

[0045] In some embodiments of this utility model, reference is made to Figure 3 As shown, the opening of the receiving groove 311 may have a chamfered structure.

[0046] In this embodiment, the opening of the receiving groove 311 is provided with a chamfer structure. For example, the chamfer can be formed by flaring, so that the radial dimension of the opening of the receiving groove 311 can gradually increase from bottom to top, so that the conical pressure head 32 can slide more stably and smoothly into the receiving groove 311 under the guidance of the inclined inner wall surface at the opening.

[0047] In some embodiments of this utility model, the pressurization assembly 40 may further include a control module, which is electrically connected to the solenoid valve 46, the pressure transmitter 44 and the booster pump 42.

[0048] In this embodiment, the control module is electrically connected to the solenoid valve 46, the pressure transmitter 44, and the booster pump 42. The control module can efficiently and accurately control the booster pump 42 and the solenoid valve 46 to operate based on the pressure information fed back by the pressure transmitter 44 and detection requirements, which can well meet the needs of automatic control. Optionally, the control module can be a PLC module (Programmable Logic Controller Module).

[0049] In some embodiments of this utility model, such as Figure 1 As shown, a hydraulic rod pressure gauge 22 can be installed on the cylinder of the manual hydraulic jack 20.

[0050] In this embodiment, a hydraulic pressure gauge 22 is installed on the cylinder of the manual hydraulic jack 20. Since the cylinder pressure of the manual hydraulic jack 20 is proportional to the pressure applied by the manual hydraulic jack 20 to the lithium battery cap 200, the operator can intuitively observe the cylinder pressure through the hydraulic pressure gauge 22, thereby more accurately controlling the pressure applied by the manual hydraulic jack 20 to the lithium battery cap 200, and thus ensuring the sealing of the pressurization chamber 301.

[0051] In some embodiments of this utility model, reference is made to Figure 1 As shown, the bracket 10 may include: a frame, a first fixing plate and a second fixing plate. The cylinder of the manual hydraulic jack 20 can be fixed to the frame through the first fixing plate. The second fixing plate is fixedly connected to the frame. The sleeve seat 31 is connected to the flange of the second fixing plate.

[0052] In this embodiment, the bracket 10 is provided with a frame body, a first fixing plate and a second fixing plate. The structure is simple. The first fixing plate can facilitate the installation and fixing of the cylinder of the hydraulic jack on the bracket 10, so that the piston rod 21 can move stably in the up and down direction. The second fixing plate can facilitate the installation and fixing of the sleeve seat 31. For example, the second fixing plate can be arranged horizontally so that the axis of the receiving groove 311 of the sleeve seat 31 can be easily aligned with the axis of the piston rod 21 and the conical pressure head 32. The sleeve seat 31 is flange-connected to the second fixing plate. The structure is simple, the fixing is reliable and the sleeve seat 31 is easy to disassemble and replace, so that the sleeve seat 31 can be easily removed for cleaning.

[0053] The following will refer to Figures 1-4This invention describes a lithium battery cap explosion-proof pressure detection device 100 according to a specific embodiment of the present invention.

[0054] like Figures 1-4 As shown, the lithium battery cap explosion-proof pressure detection device 100 includes a bracket 10, a manual hydraulic jack 20, a detection component 30, and a pressurization component 40.

[0055] The support frame 10 includes a frame body, a first fixing plate, and a second fixing plate, both of which are fixedly connected to the frame body. The manual hydraulic jack 20 includes a hydraulic pump and a cylinder body. The cylinder body is connected to the hydraulic pump and is equipped with a piston rod 21. The cylinder body is fixedly connected to the second fixing plate. The piston rod 21 extends vertically and extends downward out of the cylinder body. A hydraulic rod pressure gauge 22 is installed on the cylinder body.

[0056] The detection assembly 30 includes a sleeve seat 31 and a conical pressure head 32. The sleeve seat 31 is connected to the flange of the second fixed plate. The sleeve seat 31 is provided with an upward-facing receiving groove 311. A sealing gasket 303 is embedded in the bottom wall of the receiving groove 311. The sealing gasket 303 is annular. On the radial inner side of the sealing gasket 303, the bottom wall of the receiving groove 311 is provided with a liquid inlet hole 312. On the radial outer side of the sealing gasket 303, the bottom wall of the receiving groove 311 is provided with a liquid return hole 313.

[0057] The conical pressure head 32 includes a main body 321 and a pressure pipe 322. The outer peripheral surface of the main body 321 is provided with an annular groove, and a sealing ring 304 is embedded in the annular groove. The sealing ring 304 abuts against the inner peripheral wall of the receiving groove 311. The pressure pipe 322 extends in the vertical direction and is connected to the main body 321 as an integral part. The pressure pipe 322 and the sealing gasket 303 are arranged opposite each other in the vertical direction. The side wall of the pressure pipe 322 is provided with an overflow hole 3221.

[0058] The pressurization assembly 40 includes a liquid storage tank 41, an inlet pipe 47, a return pipe 48, a four-way connector 43, a pressure transmitter 44, a pressure gauge 45, a booster pump 42, a solenoid valve 46, and a control module. The liquid storage tank 41, the four-way connector 43, and the booster pump 42 are all mounted on the frame. The liquid inlet pipe 47 includes a first liquid inlet pipe 471, a second liquid inlet pipe 472, and a third liquid inlet pipe 473. The first liquid inlet pipe 471 is connected to the liquid inlet of the liquid storage tank 41 and the booster pump 42. The second liquid inlet pipe 472 is connected to the four-way connector 43 and the booster pump 42 outlet. The third liquid inlet pipe 473 is connected to the four-way connector 43 and the sleeve seat 31 and is connected to the pressurization chamber 301 formed at the bottom of the lithium battery cap 200 through the liquid inlet hole 312. The pressure gauge 45 and the pressure transmitter 44 are both located on the four-way connector 43. The solenoid valve 46 is located on the second liquid inlet pipe 472. The return liquid pipe 48 is connected to the sleeve seat 31 and the liquid storage tank 41 and is connected to the receiving tank 311 through the return liquid hole 313. The control module is a PLC module.

[0059] During the explosion-proof pressure test, the lithium battery cap 200 to be tested is placed flat on top of the sealing gasket 303 in the cavity of the sleeve seat 31. The edge of the lithium battery cap 200 extends beyond the sealing gasket 303 so that the subsequent sealing gasket 303 can be reliably clamped and sealed with the conical pressure head 32. Under the operator's control, the manual hydraulic jack 20 slowly drives the conical pressure head 32 downwards, allowing the lower end face of the pressure pipe 322 of the conical pressure head 32 to gently press against the surface of the lithium battery cap 200. The operator can observe the reading on the hydraulic pressure gauge 22 and continue to pressurize to the preset preload, such as 0.3 MPa. At this point, the sealing gasket 303 is compressed and undergoes elastic deformation, thus forming a seal. The PLC module controls the solenoid valve 46 to open and restart the booster pump 42. Hydraulic oil enters the pressurization chamber 301 through the second inlet pipe 472, the four-way connector 43, and the third inlet pipe 473. The pressure transmitter 44 collects pressure data in real time and feeds it back to the PLC module. When the pressure reaches 0.5 MPa, the PLC module can automatically adjust the speed of the booster pump 42, allowing the booster pump 42 to slowly and evenly increase the pressure at a preset rate. The operator can observe the pressure through the pressure gauge 45. Comparing the data with the pressure transmitter 44, the pressure display is confirmed to be consistent. When the pressure reaches the target value, the PLC module immediately controls the booster pump 42 to stop and closes the solenoid valve 46. The pressure chamber 301 enters the pressure holding timer. During the pressure holding period, if the pressure slowly drops, and the rate of drop exceeds 0.02 MPa / min, the PLC module automatically alarms to indicate poor sealing. At this time, the test is terminated and the sealing gasket 303 is checked. If the pressure drops rapidly, it indicates that the lithium battery cap 200 is broken and the explosion-proof pressure test is unqualified. After the pressure holding timer ends, the operator reverses the operation of the manual hydraulic jack 20 to raise the conical pressure head 32. The pressure chamber 301 opens naturally and connects to the receiving tank 311. The hydraulic oil can flow back to the storage tank 41 from the return pipe. The operator takes out the tested lithium battery cap 200, observes its condition, and records the critical pressure value and failure mode.

[0060] In this embodiment, a manual hydraulic jack 20 drives a conical pressure head 32 to clamp the lithium battery cap 200 in conjunction with a sealing gasket 303, thereby improving the sealing stability and reliability of the pressure chamber 301. A booster pump 42 draws oil from the storage tank 41 into the pressure chamber 301 for pressurization. A solenoid valve 46 controls the inlet pipeline 47, and a pressure transmitter 44 monitors the pressure in the pressure chamber 301 in real time. This results in higher pressure control accuracy and less human error in the pressure chamber 301. Consequently, the lithium battery cap explosion-proof pressure testing device 100 can more conveniently and accurately perform explosion-proof pressure testing on the lithium battery cap 200, with better testing results.

[0061] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0063] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0065] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A lithium battery cap explosion-proof pressure detection device, characterized in that, include: A bracket (10) and a manual hydraulic jack (20), wherein the manual hydraulic jack (20) is mounted on the bracket (10); Detection component (30), the detection component (30) comprising: A sleeve seat (31) is provided with an upward-facing receiving groove (311). A sealing gasket (303) is embedded in the bottom wall of the receiving groove (311). The sealing gasket (303) extends in a ring shape along the circumference of the sleeve seat (31). A conical pressure head (32) is connected to the piston rod (21) of the manual hydraulic jack (20) and extends into the receiving groove (311) in the vertical direction. The conical pressure head (32) is used to cooperate with the sealing gasket (303) to clamp the lithium battery cap (200). The conical pressure head (32) is adapted to cooperate with the lithium battery cap (200) to form an overflow cavity (302). The overflow cavity (302) is connected to the receiving groove (311). The bottom wall of the sealing gasket (303) and the receiving groove (311) is adapted to cooperate with the lithium battery cap (200) to form a pressurizing cavity (301). A pressurization assembly (40), the pressurization assembly (40) comprising: A liquid storage tank (41) and a liquid inlet pipe (47) are provided on the support (10), and the liquid inlet pipe (47) is connected to the liquid storage tank (41) and the pressurization chamber (301); A booster pump (42), a pressure transmitter (44), and a solenoid valve (46) are provided in the inlet pipeline (47).

2. The explosion-proof pressure detection device for lithium battery caps according to claim 1, characterized in that, The bottom wall of the receiving tank (311) is provided with a liquid inlet hole (312), which is connected to the pressurizing chamber (301). The liquid inlet pipeline (47) includes: The first inlet pipe (471) is connected to the inlet of the storage tank (41) and the booster pump (42); The second inlet pipe (472) and the third inlet pipe (473) are connected. The second inlet pipe (472) is connected to the outlet of the booster pump (42). The solenoid valve (46) is located in the second inlet pipe (472). The third inlet pipe (473) is connected to the bottom wall of the sleeve seat (31) and communicates with the inlet hole (312). The pressurizing assembly (40) also includes a four-way seat (43). The second inlet pipe (472) and the third inlet pipe (473) are connected through the four-way seat (43). The pressure transmitter (44) is located in the four-way seat (43).

3. The lithium battery cap explosion-proof pressure detection device according to claim 2, characterized in that, The pressurization assembly (40) also includes a pressure gauge (45) which is located on the four-way connector (43).

4. The explosion-proof pressure detection device for lithium battery caps according to claim 1, characterized in that, The bottom wall of the receiving tank (311) is provided with a return hole (313). The pressurizing assembly (40) also includes a return pipe (48). One end of the return pipe (48) is connected to the liquid storage tank (41), and the other end of the return pipe (48) is connected to the bottom wall of the sleeve seat (31) and communicates with the return hole (313).

5. The explosion-proof pressure detection device for lithium battery caps according to any one of claims 1-4, characterized in that, The conical pressure head (32) includes a main body (321) and a pressure tube (322). The pressure tube (322) extends along the vertical direction and is connected to the main body (321). The lower end of the pressure tube (322) is adapted to abut against the periphery of the lithium battery cap (200). The pressure tube (322) and the main body (321) are adapted to cooperate with the lithium battery cap (200) to define the overflow cavity (302). The side wall of the pressure tube (322) is provided with an overflow hole (3221).

6. The lithium battery cap explosion-proof pressure detection device according to claim 5, characterized in that, The crimping tube (322) and the sealing gasket (303) are arranged opposite each other in the vertical direction. The outer diameter of the sealing gasket (303) is the same as the outer diameter of the crimping tube (322), the inner diameter of the sealing gasket (303) is the same as the inner diameter of the crimping tube (322), and the axis of the sealing gasket (303) is collinear with the axis of the crimping tube (322).

7. The lithium battery cap explosion-proof pressure detection device according to any one of claims 1-4, characterized in that, The outer periphery of the conical indenter (32) is provided with an annular groove, which extends in an annular shape along the circumference of the conical indenter (32). The detection assembly (30) also includes a sealing ring (304), which is embedded in the annular groove and abuts against the inner peripheral wall of the receiving groove (311).

8. The lithium battery cap explosion-proof pressure detection device according to any one of claims 1-4, characterized in that, The opening of the receiving groove (311) has a chamfered structure.

9. The explosion-proof pressure detection device for lithium battery caps according to any one of claims 1-4, characterized in that, The pressurization assembly (40) also includes a control module, which is electrically connected to the solenoid valve (46), the pressure transmitter (44), and the booster pump (42).

10. The explosion-proof pressure detection device for lithium battery caps according to any one of claims 1-4, characterized in that, The manual hydraulic jack (20) is equipped with a hydraulic rod pressure gauge (22) on its cylinder body.

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