Leakage-proof detection device for lithium battery pack

Abstract

The utility model relates to the technical field of lithium battery leakage detection, and discloses a lithium battery pack anti-leakage detection device, which comprises a bottom frame, a moving table arranged at the upper part of the bottom frame, a placing die fixedly mounted at the bottom of the moving table, a lithium battery pack placed in the placing die, a bracket fixedly connected to the top of the bottom frame, and a pressing plate connected with the bracket through a cylinder I, sliding blocks are fixedly connected to the two sides of the lower portion of the moving table, sliding rails are slidably connected to the lower portions of the sliding blocks, the sliding rails are fixedly installed on the top of the bottom frame, a push plate is fixedly connected to the rear side of the bottom of the moving table, the push plate penetrates through the top of the bottom frame, and a second air cylinder is fixedly connected to the top of an inner cavity of the bottom frame; a piston rod of the second cylinder is fixedly connected with the push plate. According to the utility model, the lithium battery pack to be detected can be loaded and unloaded conveniently, and the loading and unloading are not in a pressing area, so that the loading and unloading are safer.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery leakage detection, in particular to a lithium battery pack anti-leakage detection device. Background Art

[0002] As a new type of clean energy, lithium-ion batteries have the advantages of no pollution, long service life, and high safety performance. Generally, single lithium-ion batteries are assembled in a sealed shell after being connected in series and parallel to form a lithium-ion battery pack. Single batteries are composed of pole pieces, electrolytes, and aluminum-plastic film packaging. Due to their own defects and packaging process, there is a risk of leakage. The electrolyte is composed of organic solvents, which are volatile and flammable. They are corrosive and can corrode electronic components and are harmful to the human body. Monitoring the electrolyte leakage of the battery pack can identify risks in advance and reduce hazards.

[0003] In the existing lithium battery electrolyte leakage detection, a mass spectrometer is used for detection, that is, the lithium battery is placed in a vacuum environment, and then the internal gas is detected by the mass spectrometer. When VOC gas is detected, it means that the lithium battery has a leak, otherwise it is qualified. For example, the existing Montaign vacuum electrolyte detection equipment BLD-O1 adopts this detection principle. In the above-mentioned existing similar detection equipment, the applicant found that: the existing equipment places the lithium battery pack in the storage chamber, and then starts the cylinder to drive the pressing device to move down and seal the lithium battery pack, and then evacuates the vacuum, and then turns on the mass spectrometer for detection. When loading and unloading the lithium battery pack that needs to be detected, the above structure requires the personnel to extend their hands into the pressing and sealing area, and then move the lithium battery to load and unload. Due to the small space around the pressing area, loading and unloading is limited and inconvenient, and there is a risk of being pressed when loading and unloading in the pressing area, and the safety needs to be improved. In order to solve the above-mentioned problems, a lithium battery pack anti-leakage detection device is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a lithium battery pack leakage prevention detection device in order to solve the above-mentioned problems.

[0005] The technical solution adopted by the utility model is as follows: a lithium battery pack leakage prevention detection device comprises a base frame, a moving platform is arranged on the upper part of the base frame, a placing mold is fixedly installed on the bottom of the moving platform, a lithium battery pack is placed in the placing mold, a bracket is fixedly connected to the top of the base frame, a cylinder 1 is fixedly connected to the top of the bracket, the cylinder 1 is connected to a pressing plate through a piston rod, a clamping mold is fixedly connected to the bottom of the pressing plate, a main air pipe is connected to the placing mold, one end of the main air pipe is connected to a mechanical vacuum pump, the mechanical vacuum pump is installed inside the base frame, the main air pipe is connected to a bronchus, the bronchus is connected to a molecular pump, one end of the bronchus is connected to a mass spectrometer, and the molecular pump and the mass spectrometer are both fixedly installed inside the base frame;

[0006] Slide blocks are fixedly connected to both sides of the lower part of the moving platform, and the lower part of the slide blocks is slidably connected to slide rails, and the slide rails are fixedly installed on the top of the base frame. A push plate is fixedly connected to the rear side of the bottom of the moving platform, and the push plate passes through the top of the base frame. Cylinder 2 is fixedly connected to the top of the inner cavity of the base frame, and the piston rod of cylinder 2 is fixedly connected to the push plate.

[0007] In a preferred embodiment, a placement cavity is provided in the placement mold, and a plurality of slots are provided on the front and rear inner walls of the placement cavity. Two longitudinal baffles are clamped in the slots, and two transverse baffles are clamped on the longitudinal baffles. The lithium battery pack is placed between the longitudinal baffles and the transverse baffles, and the spacing between the slots is set according to the lengths of the lithium battery packs of different sizes.

[0008] In a preferred embodiment, a plurality of upper grooves are formed on the upper portion of the longitudinal baffle, a plurality of lower grooves are formed on the lower portion of the transverse baffle, and the spacing between the upper grooves and the lower grooves is set according to the width of the lithium battery packs of different sizes.

[0009] In a preferred embodiment, a sealing gasket is arranged around the upper part of the placement mold.

[0010] In a preferred embodiment, guide rods are slidably connected to the four end corners of the pressure plate, the bottom ends of the guide rods are fixedly connected to the base frame, and the upper ends of the guide rods are fixedly connected to the bracket.

[0011] In a preferred embodiment, a square hole is fixedly connected to the bottom of the base frame, and the push plate passes through the square hole.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0013] In the utility model, when the lithium battery pack is loaded and unloaded, the second cylinder is started to push the push plate, and then the moving platform slides on the slide rail through the slider, so that the placement mold moves forward and leaves the lower pressing area. The extended placement mold is more convenient for placing and taking materials, and the safety of loading and unloading is improved.

[0014] In the utility model, the longitudinal baffle is inserted into the slot at the corresponding position according to the size of the lithium battery pack, so as to position the left and right positions of the lithium battery pack, and then the lower groove corresponding to the transverse baffle is engaged with the upper groove corresponding to the longitudinal baffle according to the width of the lithium battery pack, so as to connect the transverse baffle with the longitudinal baffle, and the longitudinal baffle is used to position the front and rear positions of the lithium battery pack. The lithium battery pack can be placed in a limited position in the entire structure, so as to avoid the movement of the lithium battery pack caused by the movement of the transfer platform or the operation of other equipment, thereby ensuring the stable placement of the lithium battery pack, and the lithium battery packs of different sizes can be limited by adjusting the structure, and the utility model has good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the placement mold, the horizontal baffle and the vertical baffle in the utility model;

[0018] Figure 4 This is a simplified diagram showing the three-dimensional structure of the base frame and the bracket in the utility model.

[0019] Markings in the figure: 1-base, 2-transfer stage, 3-placing mold, 4-lithium battery pack, 5-bracket, 6-cylinder one, 7-pressing plate, 8-closing mold, 9-main air pipe, 10-mechanical vacuum pump, 11-bronchial tube, 12-molecular pump, 13-mass spectrometer, 14-slider, 15-slide rail, 16-push plate, 17-cylinder two, 18-placing cavity, 19-card slot, 20-longitudinal baffle, 21-horizontal baffle, 22-upper groove, 23-lower groove, 24-sealing pad, 25-guide rod, 26-square hole. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] The following will be combined Figure 1-Figure 4 The lithium battery pack leakage prevention detection device according to the embodiment of the utility model is described in detail.

[0022] Example:

[0023] The lithium battery pack leakage detection device provided by the utility model embodiment refers to Figure 1 As shown, it includes a base frame 1, a moving platform 2 is arranged on the upper part of the base frame 1, a placing mold 3 is fixedly installed on the bottom of the moving platform 2, a lithium battery pack 4 is placed in the placing mold 3, a bracket 5 is fixedly connected to the top of the base frame 1, a cylinder 6 is fixedly connected to the top of the bracket 5, the cylinder 6 is connected to a pressure plate 7 through a piston rod, and a clamping mold 8 is fixedly connected to the bottom of the pressure plate 7. With this structure, a staff puts the lithium battery pack 4 required for leakage detection into the placing mold 3, and then starts the cylinder 6 to drive the clamping mold 8 of the pressure plate 7 to move down and fit with the placing mold 3, so as to seal the lithium battery pack 4 in a closed space, so as to facilitate the subsequent leakage detection of the electrolyte on the lithium battery pack 4.

[0024] refer to Figure 3 As shown, a sealing gasket 24 is arranged around the upper part of the placing mold 3. This structure uses the sealing gasket 24 to seal the gap between the placing mold 3 and the closing mold 8.

[0025] refer to Figure 1 As shown, the four end corners of the pressure plate 7 are slidably connected with guide rods 25, the bottom end of the guide rod 25 is fixedly connected to the base frame 1, and the upper end of the guide rod 25 is fixedly connected to the bracket 5. This structure uses the guide rod 25 to guide the movement of the pressure plate 7.

[0026] refer to Figure 2 As shown, the placing mold 3 is connected with a main air pipe 9, one end of the main air pipe 9 is connected with a mechanical vacuum pump 10, the mechanical vacuum pump 10 is installed inside the base frame 1, the main air pipe 9 is connected with a bronchial tube 11, the bronchial tube 11 is connected with a molecular pump 12, one end of the bronchial tube 11 is connected with a mass spectrometer 13, the molecular pump 12 and the mass spectrometer 13 are both fixedly installed inside the base frame 1, in this structure, the mechanical vacuum pump 10 is used to evacuate the space in the placing mold 3 and the closing mold 8, when the vacuum standard is reached, the bronchial tube 11 is opened, and the molecular pump 12 is started, at this time, the space gas in the placing mold 3 and the closing mold 8 will enter the bronchial tube 11, and the molecular pump 12 will compress the gas to a very high pressure, and at the same time, the gas will be sent to the mass spectrometer 13, and then the mass spectrometer 13 is used to detect the VOC index of the space gas in the placing mold 3 and the closing mold 8 (voc gas will be released when the electrolyte leaks), so as to detect whether the battery pack has leakage.

[0027] It should be noted that the above-mentioned mass spectrometer 13, mechanical vacuum pump 10 and molecular pump 12 are all existing equipment. The model of the mass spectrometer 13 is GC-MS6800, and its specific internal structure and control system have been disclosed. This application does not improve the mass spectrometer 13, so it will not be elaborated here.

[0028] refer to Figure 1 , Figure 2 and Figure 4 As shown, sliders 14 are fixedly connected to both sides of the lower part of the moving platform 2, and the lower part of the sliders 14 is slidably connected to the slide rails 15, and the slide rails 15 are fixedly installed on the top of the base frame 1, and a push plate 16 is fixedly connected to the rear side of the bottom of the moving platform 2. The push plate 16 passes through the top of the base frame 1, and a cylinder 2 17 is fixedly connected to the top of the inner cavity of the base frame 1, and the piston rod of the cylinder 2 17 is fixedly connected to the push plate 16. When loading and unloading materials, this structure starts the cylinder 2 17 to push the push plate 16, and then the moving platform 2 slides on the slide rails 15 through the sliders 14, so that the placement mold 3 moves forward and leaves the lower pressure area, and the extended placement mold 3 is more convenient for placing and taking materials, and loading and unloading materials are safer.

[0029] refer to Figure 2 and Figure 4 As shown, a square hole 26 is fixedly connected to the bottom of the base frame 1, and the push plate 16 passes through the square hole 26. This structure uses the square hole 26 to allow the push plate 16 to pass through the top of the base frame 1, and provides space for the movement of the push plate 16, while limiting the movement range of the push plate 16.

[0030] refer to Figure 2 and Figure 3 As shown, a placement cavity 18 is provided in the placement mold 3, and a plurality of slots 19 are provided on the front and rear inner side walls of the placement cavity 18. Two longitudinal baffles 20 are clamped in the slots 19, and two transverse baffles 21 are clamped on the longitudinal baffles 20. A plurality of upper grooves 22 are provided on the upper part of the longitudinal baffles 20, and a plurality of lower grooves 23 are provided on the lower part of the transverse baffles 21. The lithium battery pack 4 is placed between the longitudinal baffle 20 and the transverse baffle 21, the spacing between the slots 19 is set according to the length of the lithium battery packs 4 of different sizes, and the spacing between the upper groove 22 and the lower groove 23 is set according to the width of the lithium battery packs 4 of different sizes. This structure inserts the longitudinal baffle 20 into the slot 19 at the corresponding position according to the size of the lithium battery pack 4, thereby positioning the left and right positions of the lithium battery pack 4, and then the lower groove 23 corresponding to the transverse baffle 21 is clamped with the upper groove 22 corresponding to the longitudinal baffle 20 according to the width of the lithium battery pack 4, thereby connecting the transverse baffle 21 with the longitudinal baffle 20, and the longitudinal baffle 20 is used to position the front and rear positions of the lithium battery pack 4. The lithium battery pack 4 can be placed in a limited position in the entire structure, thereby avoiding the movement of the lithium battery pack 4 caused by the movement of the transfer platform 2 or the operation of other equipment, ensuring that the lithium battery pack 4 is placed stably, and the lithium battery packs 4 of different sizes can be limited by adjusting the structure, and the versatility is good.

[0031] It should be noted that the above-mentioned entire lithium battery leakage detection equipment is an improvement on the electrolyte leakage detection equipment model BLD-O1 of Mengtian Vacuum Technology Co., Ltd., and is an improvement on existing products. The operation of the designed electrical equipment is controlled by a PLC controller. This application does not improve specific control equipment and systems, so it will not be elaborated here.

[0032] The implementation principle of the lithium battery pack leakage prevention detection device of the embodiment of the present application is as follows: when in use, start the cylinder 2 17 to push the push plate 16, and then the moving platform 2 slides on the slide rail 15 through the slider 14, so that the placement mold 3 moves forward and leaves the lower pressing area, and then according to the size of the lithium battery pack 4, the longitudinal baffle 20 is clamped into the corresponding position of the card slot 19, and then according to the width of the lithium battery pack 4, the lower groove 23 corresponding to the transverse baffle 21 is clamped with the upper groove 22 corresponding to the longitudinal baffle 20, so that the transverse baffle 21 is connected with the longitudinal baffle 20, and then the lithium battery pack 4 is clamped between the transverse baffle 21 and the longitudinal baffle 20, and then the cylinder 2 17 is started to drive the moving platform 2 to return to its position, and then the cylinder 1 6 is started. The clamping mold 8 of the pressure plate 7 is driven to move downward and fit with the placement mold 3, thereby sealing the lithium battery pack 4 in a closed space, and the mechanical vacuum pump 10 evacuates the space in the placement mold 3 and the clamping mold 8. When the vacuum standard is reached, the bronchial tube 11 is opened and the molecular pump 12 is started. At this time, the space gas in the placement mold 3 and the clamping mold 8 will enter the bronchial tube 11, and the gas will be compressed to a very high pressure through the molecular pump 12, and the gas will be sent to the mass spectrometer 13, and then the mass spectrometer 13 is used to detect the VOC index of the space gas in the placement mold 3 and the clamping mold 8 (VOC gas will be released when the electrolyte leaks), so as to detect whether there is leakage in the battery pack.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lithium battery pack leakage prevention detection device, comprising a base frame (1), characterized in that: A moving platform (2) is arranged on the upper part of the base frame (1), a placement mold (3) is fixedly installed on the bottom of the moving platform (2), a lithium battery pack (4) is placed in the placement mold (3), a bracket (5) is fixedly connected to the top of the base frame (1), a cylinder (6) is fixedly connected to the top of the bracket (5), the cylinder (6) is connected to a pressure plate (7) via a piston rod, the bottom of the pressure plate (7) is fixedly connected to a clamping mold (8), a main air pipe (9) is connected to the placement mold (3), one end of the main air pipe (9) is connected to a mechanical vacuum pump (10), the mechanical vacuum pump (10) is installed inside the base frame (1), the main air pipe (9) is connected to a bronchus (11), the bronchus (11) is connected to a molecular pump (12), one end of the bronchus (11) is connected to a mass spectrometer (13), the molecular pump (12) and the mass spectrometer (13) are both fixedly installed inside the base frame (1); The lower sides of the moving platform (2) are fixedly connected with sliders (14), the lower part of the sliders (14) is slidably connected with slide rails (15), the slide rails (15) are fixedly installed on the top of the base frame (1), the rear side of the bottom of the moving platform (2) is fixedly connected with a push plate (16), the push plate (16) passes through the top of the base frame (1), the top of the inner cavity of the base frame (1) is fixedly connected with a cylinder 2 (17), and the piston rod of the cylinder 2 (17) is fixedly connected to the push plate (16).

2. The lithium battery pack anti-leakage detection device according to claim 1, characterized in that: A placement cavity (18) is provided in the placement mold (3), and a plurality of slots (19) are provided on the front and rear inner side walls of the placement cavity (18). Two longitudinal baffles (20) are clamped in the slots (19), and two transverse baffles (21) are clamped on the longitudinal baffles (20). The lithium battery pack (4) is placed between the longitudinal baffles (20) and the transverse baffles (21), and the spacing between the slots (19) is set according to the lengths of the lithium battery packs (4) of different sizes.

3. The lithium battery pack anti-leakage detection device according to claim 2, characterized in that: The upper portion of the longitudinal baffle (20) is provided with a plurality of upper grooves (22), the lower portion of the transverse baffle (21) is provided with a plurality of lower grooves (23), and the spacing between the upper grooves (22) and the lower grooves (23) is set according to the width of the lithium battery packs (4) of different sizes.

4. The lithium battery pack anti-leakage detection device according to claim 1, characterized in that: Sealing pads (24) are arranged around the upper part of the placement mold (3).

5. The lithium battery pack anti-leakage detection device according to claim 1, characterized in that: Guide rods (25) are slidably connected to the four end corners of the pressure plate (7), the bottom end of the guide rod (25) is fixedly connected to the base frame (1), and the upper end of the guide rod (25) is fixedly connected to the bracket (5).

6. The lithium battery pack anti-leakage detection device according to claim 1, characterized in that: A square hole (26) is fixedly connected to the bottom of the base frame (1), and the push plate (16) passes through the square hole (26).

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