Nitrogen charging and shaping device for battery

Abstract

The utility model provides a battery nitrogen charging and shaping device which comprises a shaping support frame, a nitrogen charging device and a nitrogen charging device, the clamping jaw assembly comprises a first reshaping clamp, a second reshaping clamp and a pressing plate which can move in the X-axis direction, and the clamping end of the first reshaping clamp and the clamping end of the second reshaping clamp are attached and pressed to limit the appearance of the battery; the nitrogen charging lifting assembly comprises a nitrogen unit, a nitrogen charging nozzle and a lifting unit, the nitrogen unit is connected with the nitrogen charging nozzle, and the lifting unit is used for promoting the nitrogen charging nozzle to descend so as to penetrate through the through groove to press the top of the battery and input nitrogen to a liquid injection opening of the battery; a first X-axis moving assembly; a second X-axis moving assembly; the battery can be positioned and shaped through the clamping jaw assembly, the concave part of the battery is raised by filling inert gas into the liquid injection port of the battery, and the battery is shaped into a set qualified specification shape, so that the size of a battery product meets the process regulation requirement, and the reject ratio of the product is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery processing, in particular to a battery nitrogen filling and shaping device. Background Art

[0002] In a power battery assembly line, from the process of inserting the battery cell into the shell to the sealing nail welding section, due to processes such as clamping, extrusion, and welding of the battery cell shell, the battery cell may be deformed, resulting in the scrapping of the overall product due to unqualified dimensions.

[0003] Traditional battery processing assembly lines have the following defects:

[0004] 1. The working efficiency of manual battery shaping or existing battery shaping devices is low;

[0005] 2. The sunken parts of the battery cannot be shaped, failing to meet the process requirements, resulting in a high defective rate in battery production. Content of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a battery nitrogen filling and shaping device, which can position and shape the battery through a jaw assembly, fill an inert gas into the liquid injection port of the battery to make the sunken part of the battery bulge, shape the battery into a set qualified specification shape, make the size of the battery product meet the process requirements, and reduce the defective rate of the product.

[0007] The embodiments of the utility model are realized through the following technical solutions:

[0008] A battery nitrogen filling and shaping device, comprising:

[0009] A shaping support frame, on the top of which a nitrogen filling area is provided;

[0010] A jaw assembly, including a first shaping fixture, a second shaping fixture, and a pressing plate that can all move along the X-axis direction. The pressing plate is provided with a through groove and is arranged inside the nitrogen filling area. The first shaping fixture and the second shaping fixture can be moved to the lower part of the nitrogen filling area, and the clamping ends of the first shaping fixture and the second shaping fixture are mutually attached and pressed to define the outer shape of the battery;

[0011] A nitrogen filling lifting assembly, including a nitrogen unit, a nitrogen filling nozzle, and a lifting unit. The nitrogen unit is connected to the nitrogen filling nozzle, and the lifting unit is used to cause the nitrogen filling nozzle to descend to pass through the through groove to press against the top of the battery and input nitrogen into the liquid injection port of the battery;

[0012] A first X-axis moving assembly, used to drive the nitrogen filling lifting assembly and the pressing plate to move along the X-axis direction;

[0013] The second X-axis moving component includes a first fixture moving unit for driving the first shaping fixture to move and a second fixture moving unit for driving the second shaping fixture to move.

[0014] According to a preferred embodiment, a first groove is formed at the clamping end of the first shaping fixture, and a second groove is provided at the clamping end of the second shaping fixture. The first groove and the second groove are fitted to form a closed shaping space, and the closed shaping space is adapted to the shape and size of the battery.

[0015] According to a preferred embodiment, the nitrogen unit includes an input element, a pressure detection element, a switching element, and an output element. The input element includes a proportional valve and a first pneumatic diaphragm valve connected in sequence, and the output element includes a gas-liquid separator and a second pneumatic diaphragm valve connected in sequence.

[0016] According to a preferred embodiment, a speed regulating valve is provided between the gas-liquid separator and the second pneumatic diaphragm valve.

[0017] According to a preferred embodiment, an exhaust filtering structure is further provided in the output element, and the exhaust filtering structure is arranged at the output end of the second pneumatic diaphragm valve.

[0018] According to a preferred embodiment, the shaping support frame is provided with a first guide rail and a second guide rail. The first guide rail and the second guide rail are located on the same horizontal plane. The first shaping fixture is slidably engaged with the first guide rail, and the second shaping fixture is slidably engaged with the second guide rail.

[0019] According to a preferred embodiment, the number of the jaw assemblies is at least two, and each jaw assembly is provided corresponding to one of the nitrogen filling lifting assemblies.

[0020] According to a preferred embodiment, the switching element is a three-position five-way solenoid valve.

[0021] According to a preferred embodiment, a suction cup is provided at the output end of the nitrogen filling nozzle to ensure a sealed connection between the nitrogen filling nozzle and the battery liquid injection port.

[0022] The nitrogen filling and shaping method of the battery nitrogen filling and shaping device includes the following steps:

[0023] Step S1: Convey the battery to be filled with nitrogen to the corresponding position below the nitrogen filling area, and drive the first shaping fixture and the second shaping fixture to approach and press the battery to be filled with nitrogen respectively.

[0024] Step S2: Control the first X-axis moving component to drive the nitrogen filling nozzle of the nitrogen filling lifting component to align with the liquid injection port of the battery to be filled with nitrogen and adjust the position of the pressing plate to fit the top of the battery, and drive the lifting unit to tightly seal and dock the nitrogen filling nozzle with the liquid injection port of the battery to be filled with nitrogen.

[0025] Step S3: Control the first pneumatic diaphragm valve in the input component to let air in, and nitrogen-fill the battery. If the detected air pressure value does not reach the set value, continue to nitrogen-fill the battery. After the battery protrudes in place, if the detected air pressure value reaches the set value, it means that the nitrogen filling of the battery is completed. Then, the first pneumatic diaphragm valve in the input component shuts off, and the nitrogen input stops.

[0026] Step S4: Open the second pneumatic diaphragm valve, and the inside of the battery is discharged into the exhaust filtration structure after being separated by the gas-liquid separator.

[0027] Step S5: Control the lifting unit to reset in sequence to separate the nitrogen filling nozzle from the liquid injection port of the battery, control the second X-axis moving component to reset to separate the first shaping fixture and the second shaping fixture, control the first X-axis moving component to reset to move the nitrogen filling lifting component and the pressing plate back to the initial position, and remove the battery after nitrogen filling below the nitrogen filling area to complete the nitrogen filling and shaping operation.

[0028] The technical solution of the embodiment of the present utility model has at least the following advantages and beneficial effects:

[0029] The present utility model can drive the nitrogen filling lifting component to move through the first X-axis moving component, and the pressing plate aligns with the battery to be shaped. The battery is positioned and shaped by the first shaping fixture, the second shaping fixture of the jaw assembly and the pressing plate. The lifting unit drives the nitrogen filling nozzle to fill the liquid injection port of the battery with inert gas to make the sunken part of the battery bulge, shaping the battery into a set qualified specification shape, making the battery product size meet the process requirements, reducing the product defect rate, with high automation and high work efficiency. Description of the Drawings

[0030] In order to more clearly illustrate the technical solution of the embodiment of the present utility model, the drawings required to be used in the embodiment will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is a three-dimensional structural schematic diagram of a battery nitrogen filling and shaping device provided by the embodiment of the present utility model;

[0032] Figure 2 It is a front view structural schematic diagram of a battery nitrogen filling and shaping device provided by the embodiment of the present utility model;

[0033] Figure 3 For Figure 1 The partial enlarged structural schematic diagram at A in

[0034] Figure 4Schematic layout structure diagram of the nitrogen unit provided by the embodiment of the present utility model.

[0035] Icon: 1, shaping support frame; 2, first shaping clamp; 21, first groove; 3, second shaping clamp; 31, second groove; 4, nitrogen filling area; 5, nitrogen unit; 51, proportional valve; 52, first pneumatic control diaphragm valve; 53, gas-liquid separator; 54, second pneumatic control diaphragm valve; 55, speed regulating valve; 56, exhaust filtration structure; 6, nitrogen filling nozzle; 61, pressing plate; 7, lifting unit; 8, first X-axis moving component; 9, second X-axis moving component; 91, first clamp moving unit; 92, second clamp moving unit; 10, pressure detection element; 11, first guide rail; 12, second guide rail; 13, switching element. Detailed implementation manners

[0036] For better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0037] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0039] Embodiment

[0040] Please refer to Figures 1 to 4, a battery nitrogen filling and shaping device, comprising: a shaping support frame 1, with a nitrogen filling area 4 opened at the top of the shaping support frame 1; a jaw assembly, including a first shaping jig 2, a second shaping jig 3 and a pressing plate 61 that can all move along the X-axis direction. The pressing plate 61 is provided with a through groove and is arranged inside the nitrogen filling area 4. The first shaping jig 2 and the second shaping jig 3 can be moved to the lower part of the nitrogen filling area 4. The clamping ends of the first shaping jig 2 and the second shaping jig 3 are mutually attached and pressed to define the outer shape of the battery; a nitrogen filling lifting assembly, including a nitrogen unit 5, a nitrogen filling nozzle 6 and a lifting unit 7. The nitrogen unit 5 is connected to the nitrogen filling nozzle 6. The lifting unit 7 is used to prompt the nitrogen filling nozzle 6 to descend to pass through the through groove to press the top of the battery and input nitrogen into the liquid injection port of the battery; a first X-axis moving assembly 8, used to drive the nitrogen filling lifting assembly and the pressing plate 61 to move along the X-axis direction; a second X-axis moving assembly 9, including a first jig moving unit 91 for prompting the first shaping jig 2 to move and a second jig moving unit 92 for prompting the second shaping jig 3 to move.

[0041] Furthermore, a first groove 21 is opened at the clamping end of the first shaping jig 2, and a second groove 31 is provided at the clamping end of the second shaping jig 3. The first groove 21 and the second groove 31 are attached to form a closed shaping space, and the closed shaping space is adapted to the shape and size of the battery.

[0042] Furthermore, the nitrogen unit 5 includes an input element, a pressure detection element 10, a switching element 13 and an output element. The input element includes a proportional valve 51 and a first pneumatic diaphragm valve 52 connected in sequence. The output element includes a gas-liquid separator 53 and a second pneumatic diaphragm valve 54 connected in sequence.

[0043] Furthermore, a speed regulating valve 55 is arranged between the gas-liquid separator 53 and the second pneumatic diaphragm valve 54.

[0044] Furthermore, an exhaust filtering structure 56 is also arranged on the output element, and the exhaust filtering structure 56 is arranged at the output end of the second pneumatic diaphragm valve 54.

[0045] Furthermore, the shaping support frame 1 is provided with a first guide rail 11 and a second guide rail 12. The first guide rail 11 and the second guide rail 12 are on the same horizontal plane. The first shaping jig 2 is slidably matched with the first guide rail 11, and the second shaping jig 3 is slidably matched with the second guide rail 12.

[0046] Furthermore, the number of jaw assemblies is set to at least two, and each jaw assembly is provided corresponding to a nitrogen filling lifting assembly.

[0047] Furthermore, a suction cup is arranged at the output end of the nitrogen filling nozzle 6 to ensure sealed communication between the nitrogen filling nozzle 6 and the liquid injection port of the battery.

[0048] The nitrogen filling and shaping method of the battery nitrogen filling and shaping device includes the following steps:

[0049] Step S1: Convey the battery to be filled with nitrogen to the corresponding position below the nitrogen filling area 4, and drive the first shaping jig 2 and the second shaping jig 3 to approach and press the battery to be filled with nitrogen respectively;

[0050] Step S2: Control the first X-axis moving component 8 to drive the nitrogen filling nozzle 6 of the nitrogen filling lifting component to align with the liquid injection port of the battery to be filled with nitrogen and adjust the position of the pressing plate 61 to fit the top of the battery, and drive the lifting unit 7 to tightly seal and dock the nitrogen filling nozzle 6 with the liquid injection port of the battery to be filled with nitrogen;

[0051] Step S3: Control the first pneumatic diaphragm valve 52 in the input component to let air through to fill the battery with nitrogen. If the detected air pressure value does not reach the set value, continue to fill the nitrogen. After the battery bulges in place, if the detected air pressure value reaches the set value, that is, the nitrogen filling of the battery is completed, the first pneumatic diaphragm valve 52 in the input component shuts off and stops inputting nitrogen;

[0052] Step S4: Open the second pneumatic diaphragm valve 54, and the inside of the battery is discharged into the exhaust filtration structure 56 after being separated by the gas-liquid separator 53;

[0053] Step S5: Control the lifting unit 7 to reset in sequence to separate the nitrogen filling nozzle 6 from the liquid injection port of the battery, control the second X-axis moving component 9 to reset to separate the first shaping jig 2 and the second shaping jig 3, control the first X-axis moving component 8 to reset to make the nitrogen filling lifting component and the pressing plate 61 return to the initial position, and move out the battery after nitrogen filling below the nitrogen filling area 4 to complete the nitrogen filling and shaping action.

[0054] The working principle of the present utility model:

[0055] The present utility model can drive the nitrogen filling lifting component to move through the first X-axis moving component 8, and the pressing plate 61 to align with the battery to be shaped. The battery is positioned and shaped by the first shaping jig 2, the second shaping jig 3 of the jaw component and the pressing plate 61. The lifting unit 7 drives the nitrogen filling nozzle 6 to fill the liquid injection port of the battery with inert gas to make the sunken part of the battery bulge, shaping the battery into a set qualified specification shape, making the size of the battery product meet the requirements of the process regulations, reducing the product rejection rate, with high automation and high working efficiency.

[0056] In this embodiment, the first X-axis moving component 8 can select a horizontal moving mechanism such as a linear module, which is used to drive the nitrogen filling lifting component to move and the pressing plate 61 to reciprocate left and right. The reciprocating left and right movement is Figure 2The pressing plate 61 can be connected to the bottom of the nitrogen-filling lifting assembly through a screw or a slide rail. Specifically, the pressing plate 61 can be sleeved on the screw through a connecting piece, and the screw is fixed on the frame of the nitrogen-filling lifting assembly. The lifting unit 7 and the nitrogen unit 5 are both arranged on the frame; the horizontal displacement between the pressing plate 61 and the nitrogen-filling lifting assembly is adjusted. In this embodiment, the nitrogen-filling nozzle 6 is located directly above the through slot of the pressing plate 61, and the positions of the nitrogen-filling nozzle 6 and the through slot are fixed. Therefore, the moving end of the first X-axis moving assembly 8 can synchronously drive the nitrogen-filling nozzle 6 and the pressing plate 61 to move horizontally, reducing the steps of adjusting the two.

[0057] The opening of the first groove 21 of the first shaping fixture 2 and the opening of the second groove 31 of the second shaping fixture 3 are both set toward the nitrogen filling area 4; after the first shaping fixture 2 and the second shaping fixture 3 are closed, the first groove 21 and the second groove 31 form a cavity mold that matches the shape of the battery, that is, the qualified specification shape is set. The compacted battery is located in the cavity mold to avoid excessive deformation of the battery or uneven shaping of the recessed part of the battery due to nitrogen filling. The pressing plate 61 can further limit the top of the battery. Because a pad is set at the bottom of the battery before the battery is transferred to the nitrogen filling area 4, each end face of the battery has a limiting structure to avoid uneven shaping of the recessed part of the battery and ensure smooth battery shaping. The suction cup of the nitrogen filling nozzle 6 can pass through the through groove and seal with the battery filling port.

[0058] In this embodiment, the nitrogen source can be connected to the outside and a pump source can be provided inside. The nitrogen unit 5 can also include a nitrogen bottle, which is one of the nitrogen sources. The nitrogen source provides nitrogen to the input element. The nitrogen is evenly transported to multiple nitrogen filling nozzles 6 through the proportional valve 51. The device can be provided with multiple nitrogen filling lifting components and clamping jaw components, and multiple batteries can be nitrogen-filled and shaped at the same time; the nitrogen after passing through the proportional valve 51 is transported to the nitrogen filling nozzle 6 after the first air-controlled diaphragm valve 52 is opened to input nitrogen into the battery through the battery injection port. The pressure detection element 10 is a corrosion-resistant pressure gauge. When the pressure detection element 10 detects that the nitrogen filling reaches a certain pressure value, the nitrogen filling operation is completed. The discharged impurities or excess nitrogen are separated by the gas-liquid separator 53, which can avoid the loss of battery liquid while ensuring the discharge of impurities or excess nitrogen.

[0059] During the nitrogen charging process, the switching element 13 switches the gas circuit to the air intake circuit, the first air-controlled diaphragm valve 52 is in an open state, and the second air-controlled diaphragm valve 54 is in a closed state. When the nitrogen charging is completed, the switching element 13 switches the gas circuit to the exhaust gas circuit, the first air-controlled diaphragm valve 52 is in a closed state, and the second air-controlled diaphragm valve 54 is in an open state.

[0060] The switching element 13 in this embodiment is a three-position five-way solenoid valve. The three-position five-way switching element 13 is connected to the first pneumatically controlled diaphragm valve 52 and the second pneumatically controlled diaphragm valve 54. The switching element 13 is used to switch the intake gas path. When the nitrogen unit 5 does not perform nitrogen filling or after the nitrogen filling of the battery is completed, the switching element 13 leads the gas path to the second pneumatically controlled diaphragm valve 54 for exhaust. At this time, the first pneumatically controlled diaphragm valve 52 for intake is closed, and the nitrogen unit stops intaking nitrogen into the battery. The second pneumatically controlled diaphragm valve 54 is opened, and the discharged miscellaneous gas or excessive nitrogen is sent to the exhaust filtration structure 56 for filtration treatment to filter and purify the discharged mixed gas.

[0061] In this embodiment, the first fixture moving unit 91, the second fixture moving unit 92 of the second X-axis moving assembly 9, and the lifting unit 7 can all select telescopic mechanisms such as cylinders. The first guide rail 11 and the second guide rail 12 can both improve the linear movement accuracy of the first shaping fixture 2 and the second shaping fixture 3. The battery in this embodiment is a square shell battery. The shaping support frame 1 is arranged as a hollow square frame. The nitrogen filling area 4 is the hollow position of the shaping support frame 1, which can ensure that the nitrogen filling nozzle 6 passes through the hollow position of the shaping support frame 1 and matches the battery liquid injection port below this position. The frame of the shaping support frame 1 also provides a moving and installation position for the first shaping fixture 2 and the second shaping fixture 3. Figure 4 In which B is a square shell battery, that is, the battery in this embodiment.

[0062] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. A nitrogen-filled battery shaping device, characterized in that, Comprising: A shaping support frame, on the top of which a nitrogen filling area is provided; A jaw assembly, including a first shaping jig, a second shaping jig and a pressing plate that can all move along the X-axis direction. The pressing plate is provided with a through groove and is arranged inside the nitrogen filling area. The first shaping jig and the second shaping jig can be moved to the lower part of the nitrogen filling area. The clamping ends of the first shaping jig and the second shaping jig are mutually abutted and pressed to define the outer shape of the battery; A nitrogen filling lifting assembly, including a nitrogen unit, a nitrogen filling nozzle and a lifting unit. The nitrogen unit is connected to the nitrogen filling nozzle. The lifting unit is used to make the nitrogen filling nozzle descend to pass through the through groove to press the top of the battery and input nitrogen into the liquid injection port of the battery; A first X-axis moving assembly, used to drive the nitrogen filling lifting assembly and the pressing plate to move along the X-axis direction; A second X-axis moving assembly, including a first jig moving unit for making the first shaping jig move and a second jig moving unit for making the second shaping jig move.

2. The battery nitrogen filling and shaping device according to claim 1, wherein A first groove is provided at the clamping end of the first shaping jig, and a second groove is provided at the clamping end of the second shaping jig. The first groove and the second groove are abutted to form a closed shaping space, and the closed shaping space is adapted to the shape and size of the battery.

3. The battery nitrogen filling and shaping device according to claim 1, wherein The nitrogen unit includes an input element, a pressure detection element, a switching element and an output element. The input element includes a proportional valve and a first pneumatic diaphragm valve connected in sequence. The output element includes a gas-liquid separator and a second pneumatic diaphragm valve connected in sequence.

4. The battery nitrogen filling and shaping device according to claim 3, wherein A speed regulating valve is arranged between the gas-liquid separator and the second pneumatic diaphragm valve.

5. The battery nitrogen filling and shaping device according to claim 3, wherein An exhaust filtering structure is further provided on the output element, and the exhaust filtering structure is arranged at the output end of the second pneumatic diaphragm valve.

6. The battery nitrogen filling and shaping device according to claim 1, wherein The shaping support frame is provided with a first guide rail and a second guide rail. The first guide rail and the second guide rail are on the same horizontal plane. The first shaping jig is slidably matched with the first guide rail, and the second shaping jig is slidably matched with the second guide rail.

7. The battery nitrogen filling and shaping device according to claim 1, wherein The number of the jaw assemblies is at least two, and each jaw assembly is arranged corresponding to one nitrogen filling lifting assembly.

8. The battery nitrogen filling and shaping device according to claim 3, wherein A suction cup is arranged at the output end of the nitrogen filling nozzle to ensure a sealed connection between the nitrogen filling nozzle and the liquid injection port of the battery.

9. The battery nitrogen filling and shaping device according to claim 3, wherein The switching element is a three-position five-way solenoid valve.

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