A power lithium battery top cover detection device

Abstract

The utility model relates to power lithium battery top cover detection device technical field, concretely to a kind of power lithium battery top cover detection device, including stable base plate, sealing pressure detection mechanism and connecting fixed mechanism.In the utility model, through the setting of sealing rubber strip, pressing plate and sealing pressure detector, sealing rubber strip fills up the cooperation gap of sealing connecting groove and sealing block, while adapting to the possible existence of small deformation of top cover edge, when sealing block is embedded sealing connecting groove, gas can be effectively avoided from cooperation gap leakage when inflating detection, sealing pressure detector can synchronous acquisition the pressure value of airtight space, can real-time record the pressure change curve in inflating process, it is convenient for operator to trace back detection process, analyze the specific reason of top cover sealing failure, the pressing pressure of pressing plate is evenly distributed in the electrode area of top cover, executes pressing intensity detection, avoids gas leakage in pressing process due to sealing failure to influence intensity detection result.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium battery top cover production and testing equipment, and in particular to a power lithium battery top cover testing device. Background Technology

[0002] Against the backdrop of the global push for energy transition and sustainable development, the importance of the new energy sector is becoming increasingly prominent, and power lithium batteries, as a key component, have become a focus of research and development. From new energy vehicles to energy storage systems, power lithium batteries are ubiquitous. They have not only driven the rapid development of the new energy vehicle industry, gradually turning green travel from concept into reality and effectively alleviating the environmental pollution and energy shortage problems caused by traditional fuel vehicles, but also play an irreplaceable role in the energy storage field, providing a guarantee for the stable storage and efficient utilization of renewable energy sources such as wind and solar power, and contributing to the optimization and upgrading of the energy structure. As a crucial component of the battery packaging structure, the quality of the power lithium battery top cover directly affects the battery's safety performance, sealing performance, and lifespan. If the top cover malfunctions, such as poor sealing leading to electrolyte leakage, it may cause serious consequences such as battery short circuits or even fires and explosions.

[0003] Existing technical solutions can only perform single sealing performance testing when in use, and cannot simultaneously test the pressure strength that the top cover needs to withstand during assembly. Additional pressure testing equipment is required, resulting in a cumbersome testing process and high equipment investment costs.

[0004] To address the aforementioned problems, this utility model provides a power lithium battery top cover detection device. Utility Model Content

[0005] The purpose of this invention is to solve the problem that existing testing devices have limited detection functions and require additional pressing detection equipment, and therefore proposes a power lithium battery top cover testing device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a power lithium battery top cover detection device, comprising a stable base plate, a sealing pressure detection mechanism and a connecting and fixing mechanism, wherein the sealing pressure detection mechanism and the connecting and fixing mechanism are fixedly connected to the top of the stable base plate, and the sealing pressure detection mechanism comprises a sealing pressure detection component and a pressing detection component.

[0007] The sealing pressure detection component includes a sealing strip and an inflation connection pipe, and the pressing detection component includes a hydraulic cylinder and a pressure sensor.

[0008] The sealing pressure detection component also includes a sealing connection groove opened on the top of the stable base plate, and the sealing strip is snapped into the inside of the sealing connection groove. The sealing pressure detection component also includes support columns fixedly connected to the four corners of the top of the stable base plate. A lifting component is fixedly connected inside the support column. A sealing cover is threadedly connected to the bottom of the lifting component. A sealing block is fixedly connected to the bottom edge of the sealing cover. The sealing block is snapped into the inside of the sealing connection groove.

[0009] Furthermore, the sealing strip is snapped into the connection gap between the sealing connection groove and the sealing block, and an inflation port is symmetrically fixedly connected to the outer surface of the sealing cover. The inflation connection pipe is fixedly connected to the inside of the inflation port, and an air inlet is fixedly connected to the outer surface of the inflation connection pipe. A plug is snapped into the inside of the air inlet.

[0010] Furthermore, sealing pressure detectors are fixedly connected to both sides inside the sealing cover, and the sealing pressure detectors are symmetrically arranged inside the sealing cover.

[0011] Furthermore, the lifting assembly includes an electric lifting column fixedly connected to the inner top wall of the support column, a connecting plate fixedly connected to the telescopic end of the electric lifting column, a connecting bolt threaded onto the outer surface of the connecting plate, and the top of the sealing cover threadedly connected to the telescopic end of the electric lifting column via the connecting bolt.

[0012] Furthermore, the pressure detection assembly includes a connecting plate fixedly connected to the top wall of the sealing cover, the top of the hydraulic cylinder fixedly connected to the bottom of the connecting plate, a piston rod fixedly connected to the bottom of the hydraulic cylinder, a pressing plate fixedly connected to the bottom of the piston rod, and a pressure sensor embedded inside the pressing plate.

[0013] Furthermore, the connecting and fixing mechanism includes a sliding hole groove opened on the top of the stable base plate, a sliding plate is slidably connected inside the sliding hole groove, an adjuster is threadedly connected to the outer surface of the sliding plate, a bearing is rotatably connected to the bottom of the adjuster, a positioning clamping plate is fixedly connected to the outer surface of the bearing, and multiple positioning clamping plates and adjusters are equally spaced on the outer surface of the sliding plate.

[0014] Furthermore, fasteners are threaded to both sides of the sliding plate, and multiple threaded holes are equally spaced on the top of the stabilizing base plate. The fasteners are threaded into the inside of the threaded holes, and the sliding plate is threaded to the top of the stabilizing base plate through the fasteners. The connecting and fixing mechanism also includes balance feet threaded to the four corners of the stabilizing base plate.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows: In this invention, the sealing strip, pressing plate, and sealing pressure detector are used to fill the gap between the sealing connection groove and the sealing block, while also accommodating minor deformations that may occur at the edge of the top cover. When the sealing block is embedded in the sealing connection groove, it can effectively prevent gas leakage from the gap during inflation testing. The sealing pressure detector can simultaneously collect the pressure value of the sealed space and record the pressure change curve during inflation in real time, making it easy for operators to trace the testing process and analyze the specific reasons for the top cover seal failure. The pressing pressure of the pressing plate is evenly distributed in the electrode area of ​​the top cover to perform pressing strength testing, avoiding the influence of gas leakage during pressing due to seal failure on the strength test results. Attached Figure Description

[0016] Figure 1 This utility model provides a three-dimensional structural schematic diagram of a power lithium battery top cover detection device; Figure 2 This utility model provides a structural schematic diagram of the positioning clamping plate in a power lithium battery top cover detection device; Figure 3 This utility model proposes a power lithium battery top cover testing device. Figure 2 Enlarged view of point A; Figure 4 This utility model provides a schematic diagram of the structure of the balance support foot in the power lithium battery top cover detection device; Figure 5 This utility model provides a structural schematic diagram of a sealing pressure detector in a power lithium battery top cover testing device; Figure 6 This utility model proposes a power lithium battery top cover testing device. Figure 5 Enlarged diagram of point B.

[0017] Legend: 1. Stabilizing base plate; 2. Sealing pressure detection mechanism; 21. Sealing pressure detection component; 211. Sealing strip; 212. Inflation connection pipe; 213. Sealing connection groove; 214. Support column; 215. Lifting component; 2151. Electric lifting column; 2152. Connecting plate; 2153. Connecting bolt; 216. Sealing cover; 217. Sealing block; 218. Inflation port; 219. Air inlet; 2191. Plug cap; 2192. Sealing pressure detector; 22. Press detection component; 221. Hydraulic cylinder; 222. Pressure sensor; 223. Connecting plate; 224. Piston rod; 225. Pressing plate; 3. Connecting and fixing mechanism; 31. Sliding hole groove; 32. Sliding plate; 33. Adjuster; 34. Bearing; 35. Positioning clamping plate; 36. Fastener; 37. Threaded hole; 38. Balance support foot. Detailed Implementation

[0018] Please see Figure 1-6 This utility model provides a technical solution: a power lithium battery top cover detection device, including a stable base plate 1, a sealing pressure detection mechanism 2 and a connecting and fixing mechanism 3. The sealing pressure detection mechanism 2 and the connecting and fixing mechanism 3 are fixedly connected to the top of the stable base plate 1. The sealing pressure detection mechanism 2 includes a sealing pressure detection component 21 and a pressing detection component 22.

[0019] The following section will describe in detail the specific setup and function of its sealing pressure testing mechanism 2 and connecting and fixing mechanism 3.

[0020] In this embodiment: the sealing pressure detection component 21 includes a sealing strip 211 and an inflation connection pipe 212, and the pressing detection component 22 includes a hydraulic cylinder 221 and a pressure sensor 222.

[0021] The sealing pressure detection component 21 also includes a sealing connection groove 213 opened on the top of the stable base plate 1, and a sealing strip 211 is snapped into the inside of the sealing connection groove 213. The sealing pressure detection component 21 also includes support columns 214 fixedly connected to the four corners of the top of the stable base plate 1. A lifting component 215 is fixedly connected inside the support column 214. A sealing cover 216 is threadedly connected to the bottom of the lifting component 215. A sealing block 217 is fixedly connected to the bottom edge of the sealing cover 216. The sealing block 217 is snapped into the inside of the sealing connection groove 213.

[0022] The effects achieved by the above components are as follows: the sealing connection groove 213 provides a precise assembly benchmark for the sealing strip 211 and the sealing block 217; the support column 214 stabilizes the lifting assembly 215, reducing the vertical deviation of the sealing cover 216 during lifting and lowering, and preventing the sealing block 217 from misaligning with the sealing connection groove 213, which would lead to sealing failure; the threaded connection design between the lifting assembly 215 and the sealing cover 216 ensures connection strength and facilitates the disassembly and replacement of the sealing cover 216; the sealing block 217 is engaged in the sealing connection groove 213, initially achieving mechanical seal positioning, providing a structural basis for the subsequent elastic sealing of the sealing strip 211, and forming a dual sealing front guarantee of mechanical positioning and elastic sealing, ensuring the initial fitting accuracy of the sealed space.

[0023] Specifically, the sealing strip 211 is snapped into the connection gap between the sealing connection groove 213 and the sealing block 217. The outer surface of the sealing cover 216 is symmetrically fixedly connected with an air inlet 218. The air inlet connection pipe 212 is fixedly connected to the inside of the air inlet 218. The outer surface of the air inlet connection pipe 212 is fixedly connected with an air inlet 219. The inside of the air inlet 219 is snapped with a plug cap 2191.

[0024] The effects achieved by the above components are as follows: the sealing strip 211 snaps into the gap between the sealing connection groove 213 and the sealing block 217, and elastically deforms to fill the gap, meeting the sealing requirements of high-pressure inflation testing; the symmetrically arranged inflation ports 218 cooperate with the inflation connection pipe 212 to achieve uniform inflation into the sealed space, avoiding local pressure surges caused by a single inflation port 218; the combined design of the air inlet 219 and the plug cap 2191 can seal the inflation channel during testing to prevent gas leakage, while the snap-fit ​​structure of the plug cap 2191 can achieve quick opening and closing, improving equipment calibration and testing efficiency.

[0025] Specifically, sealing pressure detectors 2192 are fixedly connected to both sides inside the sealing cover 216, and the sealing pressure detectors 2192 are symmetrically arranged inside the sealing cover 216.

[0026] The effects achieved by the above components are as follows: the symmetrically arranged sealing pressure detectors 2192 can simultaneously collect pressure data of the sealed space. By comparing the pressure difference between the two sides, the problem of local defects in the top cover can be identified. Pressure changes can be captured in real time. The linearity of pressure rise can be monitored during the inflation stage, and the pressure decay can be monitored during the pressure holding stage. This provides accurate data support for the judgment of sealing performance and avoids errors in human judgment.

[0027] Specifically, the lifting assembly 215 includes an electric lifting column 2151 fixedly connected to the inner top wall of the support column 214. The telescopic end of the electric lifting column 2151 is fixedly connected to a connecting plate 2152. The outer surface of the connecting plate 2152 is threaded with a connecting bolt 2153. The top of the sealing cover 216 is threadedly connected to the telescopic end of the electric lifting column 2151 through the connecting bolt 2153.

[0028] The effects achieved by the above components are as follows: the electric lifting column 2151 can realize lifting control, ensuring that the sealing block 217 and the sealing connection groove 213 are accurately aligned when the sealing cover 216 is pressed down, avoiding excessive compression or insufficient compaction of the sealing strip 211 due to lifting deviation. The combined design of the connecting plate 2152 and the connecting bolt 2153 not only prevents the sealing cover 216 from shifting due to loose connection, but also avoids damage to the sealing cover 216 due to excessive tightening. At the same time, the threaded connection structure facilitates the maintenance and replacement of the electric lifting column 2151, reducing equipment maintenance costs.

[0029] Specifically, the pressure detection component 22 includes a connecting plate 223 fixedly connected to the inner top wall of the sealing cover 216, the top of the hydraulic cylinder 221 fixedly connected to the bottom of the connecting plate 223, a piston rod 224 fixedly connected to the bottom of the hydraulic cylinder 221, a pressing plate 225 fixedly connected to the bottom of the piston rod 224, and a pressure sensor 222 embedded inside the pressing plate 225.

[0030] The effects achieved by the above components are as follows: the connecting plate 223 provides a stable installation reference for the hydraulic cylinder 221, so that the deviation between the axis of the hydraulic cylinder 221 and the center of the pressing area of ​​the top cover is small, ensuring that the pressure is applied vertically. The hydraulic cylinder 221 drives the pressing plate 225 to apply pressure through the piston rod 224, which meets the pressing strength testing requirements of top covers of different specifications. The rigid connection between the pressing plate 225 and the piston rod 224 ensures the pressure transmission efficiency and avoids pressure loss leading to testing errors.

[0031] Specifically, the connecting and fixing mechanism 3 includes a sliding hole groove 31 opened on the top of the stable base plate 1. A sliding plate 32 is slidably connected inside the sliding hole groove 31. An adjuster 33 is threadedly connected to the outer surface of the sliding plate 32. A bearing 34 is rotatably connected to the bottom of the adjuster 33. A positioning clamping plate 35 is fixedly connected to the outer surface of the bearing 34. Multiple positioning clamping plates 35 and adjusters 33 are equally spaced on the outer surface of the sliding plate 32.

[0032] The effects achieved by the above components are as follows: the sliding groove 31 and the sliding plate 32 slide together to achieve directional adjustment, which can be adapted to top covers of various specifications. The combined design of the adjuster 33 and the bearing 34 ensures that the positioning clamping plate 35 moves only in the horizontal direction, ensuring that the center of the top cover is aligned with the center of the sealing cover 216. The multiple positioning clamping plates 35 are evenly spaced, which can apply clamping force evenly from all sides of the top cover, avoiding excessive local clamping force that could cause the top cover to deform. At the same time, it can adapt to the positioning requirements of top covers of different shapes, improving the versatility of the device.

[0033] Specifically, fasteners 36 are threaded to both sides of the sliding plate 32, and multiple threaded holes 37 are equally spaced on the top of the stabilizing base plate 1. The fasteners 36 are threaded into the inside of the threaded holes 37, and the sliding plate 32 is threaded to the top of the stabilizing base plate 1 through the fasteners 36. The connecting and fixing mechanism 3 also includes balance feet 38 threaded to the four corners of the stabilizing base plate 1.

[0034] The effects achieved by the above components are as follows: the fastener 36 and the multiple sets of threaded holes 37 can fix the sliding plate 32 in any adjustable position; the balance support 38 can compensate for the ground height difference through thread adjustment, avoid uneven distribution of sealing pressure or displacement of pressing pressure due to equipment tilt, and prevent vibration from affecting the reading stability of pressure sensor 222 and sealing pressure detector 2192.

[0035] Working principle: By adjusting the balance feet 38 at the four corners of the stable base plate 1, the equipment is kept level. According to the size of the top cover to be tested, the fasteners 36 on both sides of the sliding plate 32 are loosened, the sliding plate 32 is moved to the appropriate position along the sliding hole groove 31, and the fasteners 36 are tightened to fix it. The adjuster 33 is rotated, and the positioning clamping plate 35 is moved through the bearing 34 to make room for the top cover. The plug cover 2191 is opened, and the inflation connection pipe 212 is connected to the standard pressure gauge through the air inlet 219. The inflation pump is started to calibrate the pressure sensor 222.

[0036] Place the top cover to be tested inside the sealing connection groove 213 of the stable base plate 1, rotate the adjuster 33 to make the positioning clamping plate 35 fit the edge of the top cover, and apply clamping force to complete the positioning and fixing of the top cover.

[0037] When the electric lifting column 2151 is activated, its telescopic end drives the sealing cover 216 to descend, causing the sealing block 217 to engage with the sealing connection groove 213. The sealing strip 211 deforms elastically under compression, filling the gap to form a sealed space. Air is then introduced into the sealed space through the air inflator 212. When the sealing pressure detector 2192 shows that the pressure has reached the preset value, the air inflator stops and the pressure is maintained. During this period, the pressure values ​​of the detectors on both sides are monitored in real time to determine the sealing performance. If the pressure exceeds the threshold, the equipment triggers an audible and visual alarm to indicate that the seal has failed.

[0038] After the sealing test is passed, the hydraulic cylinder 221 is activated, and the piston rod 224 drives the pressing plate 225 to descend until the pressing plate 225 is in contact with the electrode area of ​​the top cover. The pressure is then increased to the preset pressure and held. During this period, the pressure sensor 222 provides real-time feedback on the pressure value. After the test is completed, the hydraulic cylinder 221 drives the pressing plate 225 to reset, the electric lifting column 2151 drives the sealing cover 216 to rise, the regulator 33 is released, the top cover is removed, and the test results are recorded.

Claims

1. A power lithium battery top cover testing device, comprising a stabilizing base plate (1), a sealing pressure testing mechanism (2), and a connecting and fixing mechanism (3), characterized in that: The sealing pressure detection mechanism (2) and the connecting and fixing mechanism (3) are fixedly connected to the top of the stable base plate (1). The sealing pressure detection mechanism (2) includes a sealing pressure detection component (21) and a pressing detection component (22). The sealing pressure detection assembly (21) includes a sealing strip (211) and an inflation connection pipe (212), and the pressing detection assembly (22) includes a hydraulic cylinder (221) and a pressure sensor (222). The sealing pressure detection component (21) also includes a sealing connection groove (213) opened on the top of the stable base plate (1), the sealing strip (211) is snapped into the inside of the sealing connection groove (213), the sealing pressure detection component (21) also includes a support column (214) fixedly connected to the four corners of the top of the stable base plate (1), the support column (214) is fixedly connected to the inside of the lifting component (215), the bottom of the lifting component (215) is threadedly connected to a sealing cover (216), the bottom edge of the sealing cover (216) is fixedly connected to a sealing block (217), and the sealing block (217) is snapped into the inside of the sealing connection groove (213).

2. The power lithium battery top cover detection device according to claim 1, characterized in that: The sealing strip (211) is snapped into the connection gap between the sealing connection groove (213) and the sealing block (217). The outer surface of the sealing cover (216) is symmetrically fixedly connected with an air inlet (218). The air inlet connection pipe (212) is fixedly connected to the inside of the air inlet (218). The outer surface of the air inlet connection pipe (212) is fixedly connected with an air inlet (219). The inside of the air inlet (219) is snapped with a plug (2191).

3. The power lithium battery top cover detection device according to claim 1, characterized in that: A sealing pressure detector (2192) is fixedly connected to both sides inside the sealing cover (216), and the sealing pressure detector (2192) is symmetrically arranged inside the sealing cover (216).

4. The power lithium battery top cover detection device according to claim 1, characterized in that: The lifting assembly (215) includes an electric lifting column (2151) fixedly connected to the inner top wall of the support column (214). The telescopic end of the electric lifting column (2151) is fixedly connected to a connecting plate (2152). The outer surface of the connecting plate (2152) is threaded with a connecting bolt (2153). The top of the sealing cover (216) is threadedly connected to the telescopic end of the electric lifting column (2151) through the connecting bolt (2153).

5. The power lithium battery top cover testing device according to claim 1, characterized in that: The pressure detection assembly (22) includes a connecting plate (223) fixedly connected to the inner top wall of the sealing cover (216), the top of the hydraulic cylinder (221) fixedly connected to the bottom of the connecting plate (223), a piston rod (224) fixedly connected to the bottom of the hydraulic cylinder (221), a pressing plate (225) fixedly connected to the bottom of the piston rod (224), and a pressure sensor (222) embedded inside the pressing plate (225).

6. The power lithium battery top cover detection device according to claim 1, characterized in that: The connecting and fixing mechanism (3) includes a sliding groove (31) opened on the top of the stable base plate (1). A sliding plate (32) is slidably connected inside the sliding groove (31). An adjuster (33) is threadedly connected to the outer surface of the sliding plate (32). A bearing (34) is rotatably connected to the bottom of the adjuster (33). A positioning clamping plate (35) is fixedly connected to the outer surface of the bearing (34). Multiple positioning clamping plates (35) and adjusters (33) are equally spaced on the outer surface of the sliding plate (32).

7. The power lithium battery top cover detection device according to claim 6, characterized in that: The sliding plate (32) is threaded with fasteners (36) on both sides. The top of the stable base plate (1) is provided with multiple threaded holes (37) at equal intervals. The fasteners (36) are threaded into the inside of the threaded holes (37). The sliding plate (32) is threaded to the top of the stable base plate (1) through the fasteners (36). The connecting and fixing mechanism (3) also includes balance feet (38) threaded to the four corners of the stable base plate (1).

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