Breathing cycle testing device for battery explosion-proof valve

Abstract

The invention relates to a breathing cycle testing device for a battery anti-explosion valve. The breathing cycle testing device comprises a supporting assembly, a first cavity, a second cavity, a driving assembly and a pneumatic assembly. Through the design of the supporting assembly of the movable mounting plate and the bottom plate and the cooperation with the liftable second cavity structure, the battery explosion-proof valve can be conveniently clamped; meanwhile, by means of the double-state switching function of the pneumatic assembly, air supply can be automatically switched between the first cavity and the second cavity, the front and back pressure alternating testing of the anti-explosion valve is completed, and the problems that a traditional device is tedious in operation step and low in testing efficiency are effectively solved; according to the overall structural design of the device, the operation process is simplified, the test automation degree is improved, and the requirement for efficient test of the performance of the anti-explosion valve in the battery production process can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of explosion-proof valves, in particular to a breathing cycle test device for battery explosion-proof valves. BACKGROUND

[0002] Lithium-ion batteries have been widely used in consumer electronic devices and various energy storage systems due to their excellent performance. In recent years, with the rapid development of the new energy vehicle industry and the increasing demand for grid-level energy storage, the market has put forward more stringent requirements for the performance of lithium-ion batteries, especially safety. However, in the current industry practice, the explosion-proof safety problem of new energy vehicle power batteries is still one of the key technical pain points that need to be solved to restrict the development of the industry. Ensuring the safety of power batteries and effectively preventing serious safety accidents such as thermal runaway / explosion has always been the core focus of the industry.

[0003] As a key passive safety protection device when the internal pressure of the battery pack abnormally rises, the performance reliability of the battery explosion-proof valve directly determines the safety level of the battery system. Therefore, it is crucial to strictly and efficiently test the performance of the battery explosion-proof valve, which is an indispensable link to evaluate the overall safety performance of the battery.

[0004] Breathing cycle test is one of the core test methods for evaluating the performance of explosion-proof valves. This test aims to simulate the repeated pressure fluctuation conditions that explosion-proof valves may withstand in actual applications. By applying multiple cyclically varying pressure loads, the opening / closing characteristics, response consistency, fatigue life, and structural integrity of the explosion-proof valve are detected, thereby evaluating its reliability and stability for long-term use.

[0005] Currently, there are devices on the market for performing such breathing cycle tests; however, most existing test devices generally have the problems of complicated operation process, low automation degree, and low test efficiency when implementing the above functions. These deficiencies limit the quality control efficiency in large-scale production, increase the test cost and time cost, and are difficult to meet the growing demand for efficient and accurate testing. SUMMARY

[0006] The present application provides a breathing cycle test device for battery explosion-proof valves, comprising:

[0007] a support assembly, the support assembly comprising a mounting plate and a bottom plate arranged along a first direction; the mounting plate is movable along the first direction; the first direction is perpendicular to the bottom plate;

[0008] a first cavity, the first cavity is arranged on the side of the bottom plate close to the mounting plate, the top of the first cavity is provided with a bearing surface for placing the battery explosion-proof valve, the bearing surface is provided with a first gas outlet, and the first cavity is provided with a first gas inlet;

[0009] a second cavity, which is arranged on one side of the mounting plate close to the bottom plate; a second air outlet is arranged on one side of the second cavity close to the first cavity, and a second air inlet is arranged on the first cavity;

[0010] a driving assembly, which is connected with the mounting plate and used to drive the mounting plate to move the second cavity along the first direction;

[0011] a pneumatic assembly, an air inlet end of which is connected with an air source, and air outlet ends of the pneumatic assembly are respectively communicated with the first air inlet and the second air inlet; the pneumatic assembly has a first state and a second state; when in the first state, the air source supplies air to the first cavity; when in the second state, the air source supplies air to the second cavity.

[0012] According to the technical scheme provided in the embodiments of the present application, the mounting plate is provided with a support plate on the side away from the bottom plate, a first space is formed between the support plate and the mounting plate, a transmission assembly is arranged in the first space, and one end of the transmission assembly is fixedly connected with the mounting plate; a driving assembly is arranged on the top of the support plate, and a driving end of the driving assembly penetrates through the support plate and is connected with the transmission assembly.

[0013] According to the technical scheme provided in the embodiments of the present application, the pneumatic assembly comprises:

[0014] a first pressure regulating valve, which has a first air inlet end and a first air outlet end, and the first air inlet end is connected with the air source; the first pressure regulating valve is used to regulate the pressure of the air input into the first cavity and the second cavity;

[0015] a first reversing valve, which has a second air inlet end, a second air outlet end and a third air outlet end, the second air inlet end is connected with the first air outlet end, the second air outlet end is communicated with the first air inlet, and the second air outlet end is communicated with the second air inlet;

[0016] the first reversing valve is provided with a first reversing handle, which is used to switch between the first state and the second state; when the pneumatic assembly is in the first state, the second air inlet end is communicated with the second air outlet end, and the air source supplies air to the first cavity through the first pressure regulating valve and the first reversing valve; when the pneumatic assembly is in the second state, the second air inlet end is communicated with the third air outlet end, and the air source supplies air to the second cavity through the first pressure regulating valve and the first reversing valve.

[0017] According to the technical scheme provided in the embodiments of the present application, the pneumatic assembly comprises:

[0018] a second reversing valve having a third inlet end, a fourth outlet end and a fifth outlet end, the third inlet end being connected with the gas source;

[0019] a second pressure regulating valve having a fourth inlet end and a sixth outlet end, the fourth inlet end being connected with the fourth outlet end, the sixth outlet end being communicated with the first gas inlet; the second pressure regulating valve being used for regulating the pressure of the gas input into the first cavity;

[0020] a third pressure regulating valve having a fifth inlet end and a seventh outlet end, the fifth inlet end being connected with the fifth outlet end, the seventh outlet end being communicated with the second gas inlet; the third pressure regulating valve being used for regulating the pressure of the gas input into the second cavity;

[0021] the second reversing valve is provided with a second reversing handle, the second reversing handle being used for switching between the first state and the second state; when the pneumatic assembly is in the first state, the third inlet end is communicated with the fourth outlet end, and the gas source supplies the gas to the first cavity through the second reversing valve and the second pressure regulating valve; when the pneumatic assembly is in the second state, the third inlet end is communicated with the fifth outlet end, and the gas source supplies the gas to the second cavity through the second reversing valve and the third pressure regulating valve.

[0022] According to the technical scheme provided by the embodiment of the present application, the driving assembly comprises:

[0023] a cylinder having a third gas inlet and a third gas outlet, a driving end of the cylinder being connected with the transmission assembly;

[0024] a third reversing valve having a sixth inlet end, an eighth outlet end and a ninth outlet end, the sixth inlet end being connected with the gas source, the eighth outlet end being communicated with the third gas inlet, and the ninth outlet end being communicated with the third gas outlet;

[0025] the third reversing valve is provided with a third reversing handle, the third reversing handle being used for switching the gas path conduction state of the third reversing valve to control the moving direction of the driving end of the cylinder.

[0026] According to the technical scheme provided by the embodiment of the present application, a fourth pressure regulating valve is arranged between the gas source and the sixth inlet end, the fourth pressure regulating valve having a seventh inlet end and a tenth outlet end, the seventh inlet end being communicated with the gas source, and the tenth outlet end being communicated with the sixth inlet end; the fourth pressure regulating valve being used for regulating the pressure of the gas input into the cylinder.

[0027] According to the technical scheme provided by the embodiment of the present application, the transmission assembly comprises:

[0028] A fixed block is arranged in the first space, and an installation cavity is arranged in the fixed block;

[0029] A floating joint is arranged in the installation cavity, and one end of the floating joint is fixedly connected to the installation plate;

[0030] A floating screw is connected to the other end of the floating joint away from the installation plate, and the other end of the floating screw is connected to the driving end of the air cylinder through the fixed block.

[0031] According to the technical scheme provided in the embodiment of the application, the battery explosion-proof valve is arranged on the battery cover plate, and the battery cover plate is connected to the first cavity through the limiting assembly.

[0032] According to the technical scheme provided in the embodiment of the application, the guiding assembly is arranged between the installation plate and the bottom plate, and the guiding assembly is used to prevent the installation plate from deviating during movement.

[0033] According to the technical scheme provided in the embodiment of the application, the guiding assembly comprises:

[0034] A guide column is arranged on the bottom plate;

[0035] A linear bearing is arranged on the installation plate, and the linear bearing is sleeved on the guide column.

[0036] Compared with the prior art, the above technical scheme provided in the embodiment of the application has the following advantages:

[0037] The breathing cycle test device for the battery explosion-proof valve provided in the embodiment of the application comprises a supporting assembly, a first cavity, a second cavity, a driving assembly and a pneumatic assembly. The supporting assembly of the movable installation plate and the bottom plate is designed, and the second cavity structure is lifted, so that the battery explosion-proof valve is conveniently clamped. The double-state switching function of the pneumatic assembly can automatically switch the air supply between the first cavity and the second cavity, complete the positive and negative surface pressure alternating test of the explosion-proof valve, effectively solve the problems of complicated operation steps and low test efficiency of the traditional device. The overall structure design of the device not only simplifies the operation process, but also improves the test automation degree, and can meet the needs of efficient test of the performance of the explosion-proof valve in the battery production process. BRIEF DESCRIPTION OF DRAWINGS

[0038] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present application and together with the specification serve to explain the principles of the application.

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0040] One or more embodiments are illustrated by way of example in the drawings that are not intended to be limiting of the embodiments. Like references numerals in the drawings denote like elements, unless otherwise specified. The drawings in the figures are not necessarily drawn to scale.

[0041] Figure 1 A front view of a breathing cycle test device for a battery explosion-proof valve according to an embodiment of the present application;

[0042] Figure 2 A rear view of a breathing cycle test device for a battery explosion-proof valve according to an embodiment of the present application;

[0043] Figure 3 A schematic view of a cylinder;

[0044] Figure 4 A schematic view of a cylinder and a transmission assembly;

[0045] Figure 5 A schematic view of a third switching valve;

[0046] Figure 6 A schematic view of a third switching valve;

[0047] Figure 7 A schematic view of a first pressure regulating valve;

[0048] Figure 8 A schematic view of a first switching valve;

[0049] Figure 9 A schematic view of a first switching valve;

[0050] Figure 10 A schematic view of a first cavity;

[0051] Figure 11 A schematic view of a second cavity;

[0052] Figure 12 A schematic view of a battery cover with a battery explosion-proof valve;

[0053] Figure 13 A schematic view of a gas source delivery of a breathing cycle test device for a battery explosion-proof valve according to an embodiment of the present application.

[0054] BRIEF DESCRIPTION OF THE DRAWINGS

[0055] 1, bottom plate; 2, mounting plate; 3, first cavity; 31, first air inlet; 32, first air outlet; 33, first sealing ring; 4, second cavity; 41, second air inlet; 42, second air outlet; 43, second sealing ring; 5, support plate; 51, support column; 6, first pressure regulating valve; 61, first air inlet end; 62, first air outlet end; 63, first pressure regulating knob; 64, first air pressure gauge; 7, first reversing valve; 71, second air inlet end; 72, second air outlet end; 73, third air outlet end; 74, first muffling port; 75, first reversing handle; 8, air cylinder; 81, third air inlet; 82, third air outlet; 9, third reversing valve; 91, sixth air inlet end; 92, eighth air outlet end; 93, ninth air outlet end; 94, third muffling port; 95, third reversing handle; 10, fixed block; 11, floating joint; 12, floating screw; 13, battery explosion-proof valve; 14, battery cover plate; 15, guide column; 16, linear bearing; 17, limiting groove; 18, limiting block; 19, second pressure regulating valve; 20, third pressure regulating valve; 21, second reversing valve; 23, air source. DETAILED DESCRIPTION

[0056] In order to make the objects, technical solutions, and advantages of the embodiments of the present application clearer, the following will be used to clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0057] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplifying the present application, the components and settings of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and it does not indicate the relationship between the various embodiments and / or settings discussed.

[0058] For ease of description, spatial relative terms can be used herein to describe the positional relationship or movement of one element or feature relative to another element or feature as shown in the drawings, such as "inner", "outer", "inside", "outside", "below", "under", "above", "on", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over or reversed, or the orientation of the device is changed, the indicative directions will also change accordingly, for example: the element described as "below" or "under" other elements or features will be subsequently oriented as "above" or "above" other elements or features. Therefore, the example term "under" can include both upward and downward positions. The device can be additionally oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are interpreted accordingly.

[0059] Embodiment one

[0060] Please refer to Figures 1-12 The application provides a kind of for battery explosion valve breath cycle test device, comprising;

[0061] Supporting assembly, supporting assembly includes installation plate 2 and bottom plate 1 arranged along the first direction;Installation plate 2 can move along the first direction;The first direction is perpendicular to bottom plate 1;

[0062] First cavity 3, first cavity 3 is arranged in the side of bottom plate 1 close to installation plate 2, the top of first cavity 3 is provided with the bearing surface for placing battery explosion valve 13, bearing surface is provided with first gas outlet 32, first cavity 3 is provided with first gas inlet 31;

[0063] Second cavity 4, second cavity 4 is arranged in the side of installation plate 2 close to bottom plate 1;Second cavity 4 is provided with second gas outlet 42 in the side close to first cavity 3, and first cavity 3 is provided with second gas inlet 41;

[0064] Driving assembly, driving assembly is connected with installation plate 2, and driving assembly is used to drive installation plate 2 to drive second cavity 4 to move along the first direction;

[0065] Pneumatic assembly, the gas inlet end of pneumatic assembly is connected with gas source 23, and the gas outlet end of pneumatic assembly is communicated with first gas inlet 31 and second gas inlet 41 respectively;Pneumatic assembly has first state and second state, when being in first state, gas source 23 supplies gas to first cavity 3;When being in second state, gas source 23 supplies gas to second cavity 4.

[0066] Specifically, as Figure 1As shown in the figure, a is the first direction, and in this embodiment, the first direction is the vertical direction.

[0067] Specifically, in this embodiment, as shown in Figure 10 and Figure 11 As shown, the first air outlet 32 is provided with a first sealing ring 33, and the second air outlet 42 is provided with a second sealing ring 43, which serves to improve the air tightness of the test environment and ensure the accuracy and stability of pressure simulation during the test when the positive and negative face pressure alternation test of the explosion-proof valve is carried out.

[0068] Specifically, when the respiratory cycle test is carried out, first, the driving assembly drives the mounting plate 2 to drive the second cavity 4 to move away from the first cavity 3, then the operator places the battery explosion-proof valve 13 to be tested on the bearing surface, and the driving assembly drives the mounting plate 2 to drive the second cavity 4 to press down, so that the first cavity 3 and the second cavity 4 are tightly attached to the battery explosion-proof valve 13; finally, the pneumatic assembly is cyclically switched between the first state and the second state to complete the positive and negative bidirectional pressure alternation test of the explosion-proof valve; when the test is completed, the driving assembly drives the mounting plate 2 to drive the second cavity 4 to move away from the first cavity 3, and the battery explosion-proof valve 13 after the test is completed is taken out.

[0069] Working principle: through the support assembly design of the movable mounting plate 2 and the bottom plate 1, combined with the structure of the second cavity 4 that can be lifted, the battery explosion-proof valve 13 is conveniently clamped; at the same time, the double-state switching function of the pneumatic assembly can automatically switch the gas supply between the first cavity 3 and the second cavity 4, complete the positive and negative face pressure alternation test of the explosion-proof valve, effectively solve the problem of complicated operation steps and low test efficiency of the traditional device; the overall structure design of the device not only simplifies the operation process, but also improves the test automation degree, which can meet the needs of efficient test of the performance of the explosion-proof valve in the battery production process.

[0070] In some embodiments, the side of the mounting plate 2 away from the bottom plate 1 is provided with a support plate 5, and the support plate 5 and the mounting plate 2 have a first space therebetween, and a transmission assembly is arranged in the first space, one end of the transmission assembly being fixedly connected with the mounting plate 2; the top of the support plate 5 is provided with a driving assembly, and the driving end of the driving assembly penetrates through the support plate 5 and is connected with the transmission assembly.

[0071] Specifically, as shown in Figure 1 and Figure 2 As shown, four corners between the mounting plate 2 and the support plate 5 are respectively provided with support columns 51 to form the first space between the support plate 5 and the mounting plate 2;

[0072] Specifically, in the embodiment, the driving assembly cooperates with the transmission assembly, the power generated by the driving assembly is effectively applied to the mounting plate 2 through the transmission assembly, a stable and reliable power transmission path is provided for the movement of the mounting plate 2 in the first direction, the smoothness and stability of power transmission between components are ensured when the device is in the pressure fluctuation test working condition of the simulated battery explosion-proof valve 13, and the orderly development of the whole breathing cycle test process is assisted.

[0073] In some embodiments, the pneumatic assembly comprises:

[0074] The first pressure regulating valve 6 has a first gas inlet end 61 and a first gas outlet end 62, and the first gas inlet end 61 is connected with the gas source 23; the first pressure regulating valve 6 is used for regulating the pressure of the gas input into the first cavity 3 and the second cavity 4;

[0075] The first reversing valve 7 has a second gas inlet end 71, a second gas outlet end 72 and a third gas outlet end 73, the second gas inlet end 71 is connected with the first gas outlet end 62, the second gas outlet end 72 is communicated with the first gas inlet port 31, and the second gas outlet end 72 is communicated with the second gas inlet port 41;

[0076] The first reversing valve 7 is provided with a first reversing handle 75, which is used for switching between a first state and a second state; when the pneumatic assembly is in the first state, the second gas inlet end 71 is communicated with the second gas outlet end 72, and the gas source 23 supplies gas to the first cavity 3 through the first pressure regulating valve 6 and the first reversing valve 7; when the pneumatic assembly is in the second state, the second gas inlet end 71 is communicated with the third gas outlet end 73, and the gas source 23 supplies gas to the second cavity 4 through the first pressure regulating valve 6 and the first reversing valve 7.

[0077] Specifically, in the embodiment, as shown in Figure 7 The first pressure regulating valve 6 also integrates two functional components, a first pressure regulating knob 63 and a first pressure gauge 64; the first pressure regulating knob 63 serves as a manual adjusting element, and the tester can accurately control the pressure value of the gas entering the first cavity 3 or the second cavity 4 by rotating the knob, so as to adapt to the diversified needs of pressure in different test scenarios, such as different intensity pressure fluctuations that the explosion-proof valve may encounter in actual application; and the first pressure gauge 64 undertakes the function of pressure monitoring, can present the pressure condition of the gas in the cavity in real time and intuitively, so that the operator can clearly master the current pressure parameter, provide visual basis for pressure regulating operation, ensure the accuracy and controllability of pressure control process, assist the stable and reliable operation of the whole breathing cycle test device, and ensure the accuracy of the test on the battery explosion-proof valve 13;

[0078] Specifically, in the embodiment, as shown in Figure 8 and Figure 9As shown, the first reversing valve 7 further comprises a first muffling port 74, which can effectively suppress and attenuate the noise generated by the rapid change and impact of the gas flow during the linear gas path switching operation of the first reversing valve 7 to realize the on-off flow conversion of the gas. When the pneumatic assembly switches between the states of alternately supplying gas to the first cavity 3 and the second cavity 4 according to the test requirements, the gas flowing through the first reversing valve 7 will generate gas flow disturbance. The first muffling port 74 can reduce the generation of gas flow noise by optimizing the gas flow channel and buffering the gas flow impact, and create a quieter test environment. At the same time, stable gas flow state also helps to ensure the accuracy and continuity of pressure alternating supply, so that the pressure fluctuation applied to the battery explosion-proof valve 13 during the breathing cycle test is more in line with the actual working condition, improves the reliability of the test data, and provides strong support for accurately evaluating the performance of the explosion-proof valve.

[0079] Specifically, the operator can switch the pneumatic assembly between the first state and the second state by operating the first reversing handle 75. When switched to the first state, the gas accurately regulated by the first pressure regulating valve 6 will be guided into the first cavity 3 along the gas path through the first reversing valve 7. At this time, the gas acts on the front surface of the battery explosion-proof valve 13, simulating the working condition of applying pressure to the back surface of the explosion-proof valve. When switched to the second state, the same gas after regulation will be guided into the second cavity 4 through the passage conversion of the first reversing valve 7, and then form pressure on the back surface of the battery explosion-proof valve 13. The present application establishes a unified and stable pressure reference through the first pressure regulating valve 6, and cooperates with the flexible switching of the gas path of the first reversing valve 7 to realize the cooperative control mode. On the one hand, it simplifies the design and arrangement of the complex gas path and reduces redundant components. On the other hand, by using the accurate pressure regulation of the first pressure regulating valve 6 and the stable state switching of the first reversing valve 7, the consistency and stability of the pressure parameters are ensured during the alternating pressure test on the front and back surfaces of the battery explosion-proof valve 13. This provides a reliable and controllable test environment for accurately detecting the opening / closing characteristics, response consistency and other performance indicators of the explosion-proof valve under different stress surfaces, and helps to improve the accuracy and efficiency of the breathing cycle test of the battery explosion-proof valve 13.

[0080] In some embodiments, the drive assembly comprises:

[0081] The cylinder 8 has a third gas inlet 81 and a third gas outlet 82, and the driving end of the cylinder 8 is connected with the transmission assembly.

[0082] The third reversing valve 9 has a sixth gas inlet 91, an eighth gas outlet 92 and a ninth gas outlet 93. The sixth gas inlet 91 is connected with the gas source 23, the eighth gas outlet 92 is in communication with the third gas inlet 81, and the ninth gas outlet 93 is in communication with the third gas outlet 82.

[0083] The third reversing valve 9 is provided with a third reversing handle 95 for switching the gas path conduction state of the third reversing valve 9 to control the moving direction of the driving end of the gas cylinder 8.

[0084] Specifically, as shown in Figure 5 and Figure 6 , the third reversing valve 9 also has a third muffling port 94, which can effectively suppress and attenuate the noise generated by the rapid change and impact of the gas flow during the linear gas path switching operation of the third reversing valve 9 to realize the switching of the gas flow.

[0085] Specifically, in this embodiment, as shown in Figure 3 , the gas cylinder 8 has a piston rod as a driving end connected with the transmission assembly.

[0086] Specifically, in this embodiment, when the driving mounting plate 2 drives the second cavity 4 to rise, the third reversing valve 9 controls the sixth inlet end 91 to communicate with the eighth outlet end 92, at this time the gas source 23 ventilates to the third inlet port 81, the piston rod in the driving gas cylinder 8 is retracted, and then drives the mounting plate 2 to lift upward, so that the second cavity 4 is separated from the first cavity 3, forming an open space for clamping the battery explosion-proof valve 13; when the driving mounting plate 2 drives the second cavity 4 to descend, the third reversing valve 9 controls the sixth inlet end 91 to communicate with the ninth outlet end 93; at this time the gas source 23 ventilates to the third outlet port 82, so as to make the piston rod extend and drive the mounting plate 2 to press downward, so that the second cavity 4 is tightly pressed with the battery explosion-proof valve 13; thus it can be seen that the device adopts a pure pneumatic driving scheme, which reduces the manufacturing cost and maintenance difficulty while ensuring the test reliability.

[0087] In some embodiments, a fourth pressure regulating valve is arranged between the gas source 23 and the sixth inlet end 91, the fourth pressure regulating valve has a seventh inlet end and a tenth outlet end, the seventh inlet end communicates with the gas source 23, and the tenth outlet end communicates with the sixth inlet end 91; the fourth pressure regulating valve is used to regulate the pressure of the gas input into the gas cylinder 8.

[0088] Specifically, in this embodiment, a fourth pressure regulating valve is arranged between the gas source 23 and the sixth inlet end 91, the fourth pressure regulating valve also has a fourth pressure regulating knob and a fourth gas pressure gauge; during the test, the operator can accurately regulate the pressure of the gas input into the gas cylinder 8 by rotating the fourth pressure regulating knob, and by changing the gas pressure, the driving requirements of the gas cylinder 8 in different test scenes can be adapted, such as in the process of lifting and lowering the second cavity 4, the pressure can be flexibly adjusted according to actual needs to control the extension and retraction speed of the piston rod, the output thrust, etc., so that the movement of the second cavity 4 is more suitable for the requirements of rhythm and pressure of the test process, ensuring the stability of the device operation and the accuracy of the test results, and providing reliable power pressure regulation support for the breathing cycle test of the battery explosion-proof valve 13.

[0089] In some embodiments, the transmission assembly comprises:

[0090] a fixed block 10, the fixed block 10 is arranged in the first space, and the fixed block 10 has a mounting cavity in the interior;

[0091] a floating joint 11, the floating joint 11 is arranged in the mounting cavity, and one end of the floating joint 11 is fixedly connected with the mounting plate 2;

[0092] a floating screw 12, the floating screw 12 is connected with the end of the floating joint 11 away from the mounting plate 2, and the other end of the floating screw 12 is connected with the driving end of the air cylinder 8 through the fixed block 10.

[0093] Specifically, the transmission assembly comprises, as shown in Figure 4 , a fixed block 10, a floating joint 11 and a floating screw 12; in this application, when the driving end of the air cylinder 8 acts, the mounting plate 2 can be driven to move in a predetermined direction by means of the transmission of the floating screw 12 and the floating joint 11; in the whole transmission process, the floating joint 11 can compensate for the coaxiality deviation that may be generated in the mounting and movement process by using the floating characteristics of the floating joint 11, so as to guarantee the stability and smoothness of the transmission, so that the driving force of the air cylinder 8 can be accurately and effectively transmitted to the mounting plate 2, thereby providing reliable power support for the lifting and other actions of the second cavity 4, and assisting the stable operation of the test device to complete the breathing cycle test of the battery explosion-proof valve 13.

[0094] In some embodiments, the battery explosion-proof valve 13 is arranged on the battery cover plate 14, and the battery cover plate 14 and the first cavity 3 are connected through a limiting assembly.

[0095] Specifically, as shown in Figure 12 , the battery explosion-proof valve 13 is arranged on the battery cover plate 14, and the battery cover plate 14 and the first cavity 3 are connected through a limiting assembly; the limiting assembly can accurately constrain the assembly position of the battery cover plate 14 and the first cavity 3, and effectively prevent the displacement and shaking of the battery cover plate 14 when simulating the pressure fluctuation working condition of the explosion-proof valve breathing cycle test.

[0096] Specifically, in this embodiment, as shown in Figure 10 and Figure 12As shown, the limiting assembly includes: a limiting groove 17 and a limiting block 18, the limiting groove 17 is arranged on the bearing surface of the first cavity 3, and is located on both sides of the first cavity 3 along the second direction, the second direction is perpendicular to the first direction, in this embodiment, the second direction is the horizontal direction; the limiting block 18 is arranged at the bottom of the battery cover plate 14, and the two limiting blocks 18 are arranged one by one corresponding to the two limiting grooves 17; when the battery explosion-proof valve 13 test operation is carried out, the battery cover plate 14 with the explosion-proof valve is placed on the bearing surface of the first cavity 3, the limiting block 18 can be clamped into the limiting groove 17, and the assembly and fixation of the first cavity 3 and the battery cover plate 14 are quickly completed through the mechanical clamping structure; this clamping and matching mode can effectively limit the displacement of the battery cover plate 14 during the test process, ensure that the explosion-proof valve is always in the preset test position, and ensure the accuracy of pressure loading; and the clamping operation process is simplified, the efficiency of the test preparation stage is improved, and the operation of the whole respiratory cycle test device is more stable and the test is more efficient.

[0097] In some embodiments, a guide assembly is arranged between the mounting plate 2 and the bottom plate 1, and the guide assembly is used to prevent the mounting plate 2 from deviating during movement.

[0098] Specifically, to ensure the stability and accuracy of the movement of the mounting plate 2, a guide assembly is arranged between the mounting plate 2 and the bottom plate 1; when the mounting plate 2 is driven to move along the first direction by the driving assembly, the guide assembly can constrain and guide the movement track of the mounting plate 2 through its structural adaptability, effectively avoiding the deviation of the mounting plate 2 during movement due to uneven stress, assembly errors and other factors.

[0099] In some embodiments, the guide assembly includes:

[0100] A guide column 15 is arranged on the bottom plate 1;

[0101] A linear bearing 16 is arranged on the mounting plate 2, and the linear bearing 16 is sleeved on the outside of the guide column 15.

[0102] Specifically, in this embodiment, the guide assembly is provided with four groups, and the four groups of guide assemblies are respectively arranged at the four corner positions of the mounting plate 2; such a layout can guide and limit the movement of the mounting plate 2 from the four corners, and can more evenly distribute the stress during the movement of the mounting plate 2 by using the symmetrical distribution structure, thereby further improving the stability and track accuracy of the mounting plate 2 during movement along the first direction, and laying a structural foundation for the accurate cooperation of the second cavity 4 and the first cavity 3 and the stable development of the battery explosion-proof valve 13 respiratory cycle test;

[0103] Specifically, in the embodiment, the guide assembly includes a guide column 15 and a linear bearing 16; when the mounting plate 2 moves in the first direction under the action of the driving assembly, the linear bearing 16 can slide along the axis of the guide column 15, and the low-friction and high-precision characteristics of the linear bearing 16 can ensure the smoothness of the movement of the mounting plate 2 and the accuracy of the trajectory;

[0104] Specifically, the use method of the breathing cycle test device of the battery explosion-proof valve 13 provided in the embodiment is as follows:

[0105] First, the joint gas source 23 is divided into two paths through a three-way joint, one path is connected to the first gas inlet 61 of the first pressure regulating valve 6, and the other path is connected to the sixth gas inlet 91 of the third reversing valve 9; the first pressure regulating knob 63 of the first pressure regulating valve 6 is rotated counterclockwise to make the gas pressure return to zero; at this time, the third reversing handle 95 is actuated to make the sixth gas inlet 91 communicate with the eighth gas outlet 92, so that the gas source 23 supplies gas to the third gas inlet 81, drives the piston rod in the air cylinder 8 to retract, and further drives the mounting plate 2 to lift upward, so that the second cavity 4 is separated from the first cavity 3;

[0106] Subsequently, the battery cover plate 14 with the battery explosion-proof valve 13 is installed on the bearing surface of the first cavity 3 through the limiting assembly, and at this time, the first gas outlet 32 is aligned with the battery explosion-proof valve 13;

[0107] Subsequently, the third reversing handle 95 is actuated to make the sixth gas inlet 91 communicate with the ninth gas outlet 93, so that the gas source 23 supplies gas to the third gas outlet 82, so as to drive the piston rod to extend and drive the mounting plate 2 to apply pressure downward, so that the second gas outlet 42 of the second cavity 4 is tightly pressed against the battery explosion-proof valve 13;

[0108] Subsequently, the first pressure regulating knob 63 is rotated clockwise to make the gas pressure reach the test standard, and at this time, the operator controls the first reversing handle 75 to realize the switching of the pneumatic assembly between the first state and the second state; when switched to the first state, the gas accurately regulated by the first pressure regulating valve 6 will be guided into the first cavity 3 along the gas path through the guidance of the first reversing valve 7, and at this time, the gas acts on the front surface of the battery explosion-proof valve 13 to simulate the working condition of applying pressure to the back surface of the explosion-proof valve; when switched to the second state, the same gas after regulation will be guided into the second cavity 4 by the switching of the passage of the first reversing valve 7, and then pressure will be applied to the back surface of the battery explosion-proof valve 13;

[0109] After a certain number of cycle tests are completed, the first reversing handle 75 is actuated to make the second gas inlet 71 communicate with the second gas outlet 72, the gas source 23 supplies gas to the first cavity 3, the first pressure regulating knob 63 is continued to be rotated clockwise slowly, and at the same time, the pressure of the first gas pressure gauge 64 is observed, until the battery explosion-proof valve 13 breaks, the value displayed on the gas pressure gauge is recorded, and the maximum threshold of the gas pressure that the battery explosion-proof valve 13 can withstand is obtained.

[0110] Finally, rotate the first pressure regulating knob counterclockwise to zero the air pressure, and turn the third reversing handle 95, at this time the air source 23 supplies air to the third air inlet 81, drives the piston rod in the air cylinder 8 to retract, and further drives the second cavity 4 to lift upward, facilitating the removal of the battery cover plate 14, and completing the test.

[0111] Example Two

[0112] Please refer to Figure 13 The air source delivery schematic of the breathing cycle test device for the battery explosion-proof valve provided in the embodiment has the same parts as those in example 1, and the difference lies in that:

[0113] The pneumatic assembly comprises:

[0114] The second reversing valve 21 has a third air inlet end, a fourth air outlet end and a fifth air outlet end, the third air inlet end is connected with the air source 23;

[0115] The second pressure regulating valve 19 has a fourth air inlet end and a sixth air outlet end, the fourth air inlet end is connected with the fourth air outlet end, and the sixth air outlet end is in communication with the first air inlet 31; the second pressure regulating valve 19 is used for regulating the pressure of the gas input into the first cavity 3;

[0116] The third pressure regulating valve 20 has a fifth air inlet end and a seventh air outlet end, the fifth air inlet end is connected with the fifth air outlet end, and the seventh air outlet end is in communication with the second air inlet 41; the third pressure regulating valve is used for regulating the pressure of the gas input into the second cavity 4;

[0117] The second reversing valve 21 is provided with a second reversing handle, which is used for switching between a first state and a second state; when the pneumatic assembly is in the first state, the third air inlet end is in communication with the fourth air outlet end, and the air source 23 supplies air to the first cavity 3 through the second reversing valve 21 and the second pressure regulating valve 19; when the pneumatic assembly is in the second state, the third air inlet end is in communication with the fifth air outlet end, and the air source 23 supplies air to the second cavity 4 through the second reversing valve 21 and the third pressure regulating valve 20.

[0118] Specifically, in the embodiment, the second pressure regulating valve 19 and the third pressure regulating valve 20 are respectively used for independently controlling the gas pressure in the first cavity 3 and the second cavity 4; both are provided with a pressure regulating knob and an air pressure gauge, wherein the pressure regulating knob serves as a manual adjusting element, and the tester can accurately regulate and control the pressure value of the gas entering the corresponding cavity through the rotating operation, and flexibly adapt to the pressure requirements in different test scenarios; the air pressure gauge can present the pressure state in the cavity in real time and intuitively, provide visual basis for pressure regulation, ensure accurate and controllable pressure regulation, support stable and reliable operation of the breathing cycle test device, and ensure accurate test data of the battery explosion-proof valve 13;

[0119] Specifically, in the present embodiment, the second reversing valve 21 further comprises a second muffling port, which can effectively suppress and attenuate the noise generated due to the rapid variation and impact of the gas flow during the linear gas path switching operation of the second reversing valve 21 to realize the on-off flow switching of the gas;

[0120] Specifically, in the pressure application working condition simulation, when the second reversing handle is pulled to the first state, the gas flow is introduced into the first cavity 3 after being accurately and stably regulated by the second pressure regulating valve 19, and acts on the front of the battery explosion-proof valve 13; when switched to the second state, the gas flow is input into the second cavity 4 after being independently regulated by the third pressure regulating valve 20, and acts on the back of the explosion-proof valve. This dual-channel pressure decoupling design breaks through the limitation of traditional single-path pressure regulation, not only supports independent setting of different thresholds for positive and negative test pressures, accurately reproduces the asymmetric pressure impact scene of the explosion-proof valve under complex working conditions, but also completely eliminates the pressure crosstalk problem during cyclic switching, providing a laboratory-level test environment guarantee for the extreme boundary test of the power battery safety valve.

[0121] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0122] Although the terms first, second, third, and the like can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms when used herein do not imply a sequence or order. Therefore, a first element, component, region, layer or section discussed below can be referred to as a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0123] The foregoing detailed description of the application has been presented for purposes of illustration and description. Various modifications and changes can be made to these embodiments without departing from the spirit and scope of the application. It is intended that the scope of the application should not be limited by the particular representative embodiments described above.

Claims

1. A breathing cycle test device for a battery explosion-proof valve, characterized in that: include: A support assembly, comprising a mounting plate (2) and a base plate (1) arranged in a first direction; The mounting plate (2) is movable along the first direction; the first direction is perpendicular to the base plate (1); A first cavity (3), the first cavity (3) being arranged on a side of the bottom plate (1) close to the mounting plate (2), a bearing surface for placing a battery explosion-proof valve (13) being provided on the top of the first cavity (3), a first air outlet (32) being provided on the bearing surface, and a first air inlet (31) being provided on the first cavity (3); a second cavity (4), the second cavity (4) being arranged on a side of the mounting plate (2) close to the bottom plate (1); a second air outlet (42) being arranged on a side of the second cavity (4) close to the first cavity (3), and a second air inlet (41) being arranged on the first cavity (3); a driving assembly, the driving assembly being connected to the mounting plate (2), the driving assembly being used to drive the mounting plate (2) to drive the second cavity (4) to move along the first direction; A pneumatic component, wherein the air inlet end of the pneumatic component is connected to the air source (23), and the air outlet end of the pneumatic component is respectively connected to the first air inlet (31) and the second air inlet (41); the pneumatic component has a first state and a second state, and when in the first state, the air source (23) supplies air to the first cavity (3); when in the second state, the air source (23) supplies air to the second cavity (4).

2. A breathing cycle test device for a battery explosion-proof valve according to claim 1, characterized in that: A support plate (5) is provided on a side of the mounting plate (2) away from the base plate (1), a first space is defined between the support plate (5) and the mounting plate (2), a transmission assembly is provided in the first space, one end of the transmission assembly is fixedly connected to the mounting plate (2); a driving assembly is provided on the top of the support plate (5), a driving end of the driving assembly passes through the support plate (5) and is connected to the transmission assembly.

3. A breathing cycle test device for a battery explosion-proof valve according to claim 2, characterized in that: The pneumatic assembly includes: a first pressure regulating valve (6), the first pressure regulating valve (6) having a first air inlet end (61) and a first air outlet end (62), the first air inlet end (61) being connected to the air source (23); the first pressure regulating valve (6) being used to regulate the pressure of the gas input into the first cavity (3) and the second cavity (4); a first reversing valve (7), the first reversing valve (7) having a second air inlet end (71), a second air outlet end (72), and a third air outlet end (73), the second air inlet end (71) being connected to the first air outlet end (62), the second air outlet end (72) being in communication with the first air inlet (31), and the second air outlet end (72) being in communication with the second air inlet (41); The first reversing valve (7) is provided with a first reversing handle (75), and the first reversing handle (75) is used to switch between the first state and the second state; when the pneumatic component is in the first state, the second air inlet end (71) is communicated with the second air outlet end (72), and the air source (23) supplies air to the first cavity (3) via the first pressure regulating valve (6) and the first reversing valve (7); when the pneumatic component is in the second state, the second air inlet end (71) is communicated with the third air outlet end (73), and the air source (23) supplies air to the second cavity (4) via the first pressure regulating valve (6) and the first reversing valve (7).

4. A breathing cycle testing device for a battery explosion-proof valve according to claim 2, characterized in that: The pneumatic assembly includes: a second reversing valve (21), the second reversing valve (21) having a third air inlet end, a fourth air outlet end, and a fifth air outlet end, the third air inlet end being connected to the air source (23); a second pressure regulating valve (19), the second pressure regulating valve (19) having a fourth air inlet end and a sixth air outlet end, the fourth air inlet end being connected to the fourth air outlet end, and the sixth air outlet end being in communication with the first air inlet (31); the second pressure regulating valve (19) being used to regulate the pressure of the gas input into the first cavity (3); a third pressure regulating valve (20), the third pressure regulating valve (20) having a fifth air inlet end and a seventh air outlet end, the fifth air inlet end being connected to the fifth air outlet end, and the seventh air outlet end being in communication with the second air inlet (41); the third regulating valve being used to regulate the pressure of the gas input into the second cavity (4); The second reversing valve (21) is provided with a second reversing handle, and the second reversing handle is used to switch between the first state and the second state; when the pneumatic component is in the first state, the third air inlet end is connected to the fourth air outlet end, and the air source (23) supplies air to the first cavity (3) through the second reversing valve (21) and the second pressure regulating valve (19); when the pneumatic component is in the second state, the third air inlet end is connected to the fifth air outlet end, and the air source (23) supplies air to the second cavity (4) through the second reversing valve (21) and the third pressure regulating valve (20).

5. A breathing cycle testing device for a battery explosion-proof valve according to claim 2, characterized in that: The drive assembly includes: A cylinder (8), the cylinder (8) having a third air inlet (81) and a third air outlet (82), and a driving end of the cylinder (8) connected to the transmission assembly; a third reversing valve (9), the third reversing valve (9) having a sixth air inlet end (91), an eighth air outlet end (92), and a ninth air outlet end (93), the sixth air inlet end (91) being connected to the air source (23), the eighth air outlet end (92) being in communication with the third air inlet port (81), and the ninth air outlet end (93) being in communication with the third air outlet port (82); The third reversing valve (9) is provided with a third reversing handle (95), and the third reversing handle (95) is used to switch the air path conduction state of the third reversing valve (9) to control the moving direction of the driving end of the cylinder (8).

6. A breathing cycle test device for a battery explosion-proof valve according to claim 5, characterized in that: A fourth pressure regulating valve is provided between the gas source (23) and the sixth gas inlet end (91), the fourth pressure regulating valve having a seventh gas inlet end and a tenth gas outlet end, the seventh gas inlet end being in communication with the gas source (23), and the tenth gas outlet end being in communication with the sixth gas inlet end (91); the fourth pressure regulating valve is used for regulating the pressure of the gas input into the cylinder (8).

7. A breathing cycle test device for a battery explosion-proof valve according to claim 5, characterized in that: The transmission components include: A fixing block (10), the fixing block (10) being arranged in the first space, and the fixing block (10) having an installation cavity therein; A floating joint (11), wherein the floating joint (11) is arranged in the mounting cavity, and one end of the floating joint (11) is fixedly connected to the mounting plate (2); A floating screw (12) is connected to one end of the floating joint (11) away from the mounting plate (2), and the other end of the floating screw (12) passes through the fixed block (10) and is connected to the driving end of the cylinder (8).

8. A breathing cycle testing device for a battery explosion-proof valve according to claim 1, characterized in that: The battery explosion-proof valve (13) is arranged on a battery cover (14), and the battery cover (14) and the first cavity (3) are connected via a limiting assembly.

9. A breathing cycle testing device for a battery explosion-proof valve according to claim 1, characterized in that: A guide assembly is provided between the mounting plate (2) and the base plate (1), and the guide assembly is used to prevent the mounting plate (2) from deflecting during movement.

10. A breathing cycle testing device for a battery explosion-proof valve according to claim 9, characterized in that: The guide assembly comprises: A guide post (15), wherein the guide post (15) is arranged on the base plate (1); A linear bearing (16) is provided on the mounting plate (2), and the linear bearing (16) is sleeved outside the guide column (15).

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