Soft package lithium battery vacuum sealing device and method thereof

Abstract

The invention belongs to the technical field of vacuum sealing, and particularly relates to a soft package lithium battery vacuum sealing device and a method thereof.The soft package lithium battery vacuum sealing device comprises a sealing box, a pipeline provided with a valve is fixedly installed on the side wall of the sealing box, and the soft package lithium battery vacuum sealing device further comprises a clamping assembly used for clamping multiple sets of soft package lithium batteries and arranged at the bottom end of the sealing box; and the sealing assembly is used for sealing the plurality of groups of soft package lithium batteries and is arranged at the top end of the sealing box. The clamping assembly comprises first box bodies, the first box bodies are fixedly installed on the two sides of the bottom end of the sealing box, the first air cylinders are fixedly installed in the first box bodies, and piston rods of the first air cylinders are provided with clamping plates. The soft package lithium battery vacuum sealing device has the advantages that when soft package lithium batteries are produced, vacuum sealing operation can be conducted on multiple sets of soft package lithium batteries, then vacuum sealing can be conducted on the soft package lithium batteries on a large scale, and therefore the production efficiency of the soft package lithium batteries can be improved to a certain degree.

Description

Technical Field

[0001] The present invention relates to the field of vacuum sealing technology, in particular to a vacuum sealing device for a soft-pack lithium battery and a method thereof. Background Art

[0002] During the production of soft-pack lithium batteries, the electrolyte needs to be injected into the air bag. After the electrolyte is injected into the air bag, it needs to be left to stand, and then the air bag is sealed under vacuum conditions. The vacuum is to reduce the residual gas in the air bag and reduce the degree of subsequent swelling.

[0003] However, the existing vacuum sealing device for soft-pack lithium batteries can usually only vacuum seal one group of soft-pack lithium batteries at a time, and cannot vacuum seal multiple groups of soft-pack lithium batteries, and thus it is difficult to vacuum seal a large number of soft-pack lithium batteries, which has limitations. Therefore, a vacuum sealing device and method for soft-pack lithium batteries are invented. Summary of the invention

[0004] In view of the above and / or existing problems in a vacuum sealing device and method for a soft-pack lithium battery, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a vacuum sealing device and method for soft-pack lithium batteries, which can solve the above-mentioned existing problems.

[0006] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A vacuum sealing device for a soft-pack lithium battery, comprising a sealing box, a pipeline with a valve fixedly mounted on the side wall of the sealing box, and further comprising:

[0008] A clamping assembly for clamping a plurality of groups of soft-pack lithium batteries, and the clamping assembly is arranged on the bottom end of the sealing box;

[0009] A sealing assembly is used for sealing a plurality of groups of soft-pack lithium batteries, and the sealing assembly is arranged on the top of a sealing box.

[0010] As a preferred solution of the vacuum sealing device for soft-pack lithium batteries described in the present invention, the clamping assembly includes:

[0011] A first box body, with the first box body fixedly mounted on both sides of the bottom end of the sealed box;

[0012] The first cylinder is fixedly installed in the first box body, and the piston rod of the first cylinder is provided with a clamping plate.

[0013] As a preferred solution of the vacuum sealing device for soft-pack lithium batteries described in the present invention, the clamping assembly further includes:

[0014] A first side plate, with the first side plates fixedly mounted on both sides of the bottom end of the sealing box;

[0015] A first screw rod, wherein the first screw rod is rotatably connected between the two sets of first side plates via a bearing, and the thread directions of two ends of the first screw rod are arranged to be opposite from the middle;

[0016] A first slider, wherein both ends of the first screw rod are threadedly connected to the first slider;

[0017] A first L-shaped rod, wherein the first L-shaped rod is fixedly mounted on the top of the first sliding block, and a clamping plate is provided on the top of the first L-shaped rod;

[0018] A first guide rod, wherein the first guide rod is fixedly mounted between the two sets of first side plates, and the first sliding block is slidably connected to the first guide rod;

[0019] A first servo motor is fixedly mounted on a set of first side plates, and an output shaft of the first servo motor is fixedly connected to the first screw rod.

[0020] As a preferred solution of the vacuum sealing device for soft-pack lithium batteries described in the present invention, the clamping plate includes:

[0021] A first square plate, on which the piston rod of the first cylinder and the top end of the first L-shaped rod are both fixedly mounted;

[0022] A first notch, wherein both ends of the first square plate are provided with a first notch;

[0023] A second square plate is slidably connected in the first notch.

[0024] As a preferred solution of the vacuum sealing device for soft-pack lithium batteries described in the present invention, the clamping plate further comprises:

[0025] A first connecting plate, with both ends of the first square plate being fixedly mounted with the first connecting plate;

[0026] a second cylinder, the second cylinder being fixedly mounted on the first connecting plate;

[0027] The second connecting plate is fixedly mounted on the second square plate, and the piston rod of the second cylinder is fixedly mounted on the second connecting plate.

[0028] As a preferred solution of the vacuum sealing device for a soft-pack lithium battery of the present invention, the sealing component comprises:

[0029] A second box body, wherein the second box body is fixedly mounted on the top of the sealed box;

[0030] a third cylinder, the third cylinder being fixedly mounted in the second box body;

[0031] A bearing plate, on which the piston rod of the third cylinder is fixedly mounted.

[0032] As a preferred solution of the vacuum sealing device for a soft-pack lithium battery of the present invention, the sealing component further comprises:

[0033] A fixing block, the fixing block being fixedly mounted on the bottom middle end of the bearing plate;

[0034] A second side plate, with the second side plates being fixedly mounted on both ends of the bottom of the bearing plate;

[0035] A second screw rod, the second side plate and the fixing block are rotatably connected to the second screw rod via a bearing;

[0036] a second slider, the second slider being threadedly connected to the second screw rod;

[0037] A second guide rod, the second guide rod is fixedly installed between the second side plate and the fixing block, and the second sliding block is slidably connected to the second guide rod;

[0038] The second servo motor is fixedly mounted on the second side plate, and the output shaft of the second servo motor is fixedly connected to the second screw rod.

[0039] As a preferred solution of the vacuum sealing device for a soft-pack lithium battery of the present invention, the sealing component further comprises:

[0040] A first copper block, wherein the first copper block is fixedly mounted on the bottom of the fixed block;

[0041] A first electric heating tube, wherein the first electric heating tube is fixedly installed in the first copper block;

[0042] A first copper bar is fixedly mounted on both ends of the first copper block.

[0043] As a preferred solution of the vacuum sealing device for a soft-pack lithium battery of the present invention, the sealing component further comprises:

[0044] A second copper block, wherein the second copper block is fixedly mounted on the bottom of the second sliding block;

[0045] A second electric heating tube, wherein the second electric heating tube is fixedly installed in the second copper block;

[0046] A second copper bar is fixedly mounted on a side of the second copper block facing the first copper block.

[0047] A vacuum sealing method for a soft-pack lithium battery comprises the following specific steps:

[0048] Step 1: The height of the carrier plate is adjusted by the third cylinder, and the length of the clamping plate is adjusted by the second cylinder until the height of the carrier plate and the length of the clamping plate match the size of the soft-pack lithium battery;

[0049] Step 2: Place the battery cell that has been filled with liquid and has been at rest between the two sets of clamps, and make the air bag opening between the first copper bar and the second copper bar. Then, the two sets of clamps are moved toward each other through the cooperation of the first cylinder and the first servo motor, so that the battery cell can be fixed. During this process, the air in the sealed box will be extracted through the vacuum pump connected to the pipeline;

[0050] Step three: Move the second copper block toward the first copper block through the second servo motor until the first copper bar and the second copper bar squeeze the air bag opening. During this process, the first copper bar and the second copper bar are heated by the first electric heating tube and the second electric heating tube, so that the air bag opening can be heat-sealed.

[0051] Compared with existing technologies:

[0052] By providing a clamping assembly for clamping multiple groups of soft-pack lithium batteries and a sealing assembly for sealing multiple groups of soft-pack lithium batteries, it is possible to perform vacuum sealing operations on multiple groups of soft-pack lithium batteries during the production of soft-pack lithium batteries, thereby being able to meet the needs of vacuum sealing of large quantities of soft-pack lithium batteries, thereby improving the production efficiency of soft-pack lithium batteries to a certain extent; in addition, through the provided clamping assembly and sealing assembly, vacuum sealing operations can also be performed on soft-pack lithium batteries of various sizes, thereby improving flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a front view schematic diagram of the structure of the present invention;

[0054] Figure 2 For the present invention Figure 1 A schematic diagram of the structure enlargement in the middle;

[0055] Figure 3 This is a schematic diagram of the structure of the second copper block, the second electric heating tube and the second copper bar of the present invention;

[0056] Figure 4 It is a schematic diagram of the local structure of the splint of the present invention;

[0057] Figure 5 This is a schematic diagram of the first L-shaped rod structure of the present invention;

[0058] Figure 6 It is a schematic diagram of the sealing box structure of the present invention.

[0059] In the figure: a sealing box 10, a pipeline 11, a first box body 20, a first cylinder 21, a first side plate 22, a first screw 23, a first slider 24, a first L-shaped rod 25, a first guide rod 26, a first servo motor 27, a first square plate 30, a first notch 31, a second square plate 32, a first connecting plate 33, a second cylinder 34, a second connecting plate 35, a second box body 40, a third cylinder 41, a bearing plate 42, a fixing block 43, a second side plate 44, a second screw 45, a second slider 46, a second guide rod 47, a second servo motor 48, a first copper block 49, a first electric heating tube 491, a first copper bar 492, a second copper block 493, a second electric heating tube 494, and a second copper bar 495. DETAILED DESCRIPTION

[0060] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0061] The present invention provides a vacuum sealing device for soft-pack lithium batteries. Figure 1-Figure 6 , comprising a sealed box 10, a pipe 11 with a valve fixedly mounted on the side wall of the sealed box 10, wherein the pipe 11 is connected to an external vacuum pump.

[0062] It also includes: a clamping assembly for clamping a plurality of groups of soft-pack lithium batteries, and the clamping assembly is arranged on the bottom end of the sealing box 10;

[0063] The clamping assembly includes: a first box body 20, a first cylinder 21, a first side plate 22, a first screw rod 23, a first slider 24, a first L-shaped rod 25, a first guide rod 26, and a first servo motor 27;

[0064] The first box body 20 is fixedly installed on both sides of the bottom end of the sealed box 10, the first cylinder 21 is fixedly installed in the first box body 20, and the piston rod of the first cylinder 21 is provided with a clamping plate, the first side plates 22 are fixedly installed on both sides of the bottom end of the sealed box 10, the first screw 23 is rotatably connected between the two groups of first side plates 22 through a bearing, and the thread directions of the two ends of the first screw 23 are set to be opposite from the middle, both ends of the first screw 23 are threadedly connected to the first slider 24, the first L-shaped rod 25 is fixedly installed on the top of the first slider 24, and the top end of the first L-shaped rod 25 is provided with a clamping plate, the first guide rod 26 is fixedly installed between the two groups of first side plates 22, and the first slider 24 is slidably connected to the first guide rod 26, the first servo motor 27 is fixedly installed on a group of first side plates 22, and the output shaft of the first servo motor 27 is fixedly connected to the first screw 23.

[0065] The clamping plate includes: a first square plate 30, a first notch 31, a second square plate 32, a first connecting plate 33, a second cylinder 34, and a second connecting plate 35;

[0066] The piston rod of the first cylinder 21 and the top end of the first L-shaped rod 25 are fixedly mounted on the first square plate 30, both ends of the first square plate 30 are provided with first notches 31, the second square plate 32 is slidably connected in the first notches 31, both ends of the first square plate 30 are fixedly mounted on the first connecting plate 33, the second cylinder 34 is fixedly mounted on the first connecting plate 33, the second connecting plate 35 is fixedly mounted on the second square plate 32, and the piston rod of the second cylinder 34 is fixedly mounted on the second connecting plate 35.

[0067] It also includes: a sealing assembly for sealing a plurality of groups of soft-pack lithium batteries, and the sealing assembly is arranged on the top of the sealing box 10;

[0068] The sealing assembly includes: a second box body 40, a third cylinder 41, a bearing plate 42, a fixing block 43, a second side plate 44, a second screw 45, a second slider 46, a second guide rod 47, a second servo motor 48, a first copper block 49, a first electric heating tube 491, a first copper strip 492, a second copper block 493, a second electric heating tube 494, and a second copper strip 495;

[0069] The second box body 40 is fixedly mounted on the top of the sealed box 10, the third cylinder 41 is fixedly mounted in the second box body 40, the piston rod of the third cylinder 41 is fixedly mounted on the carrier plate 42, the fixing block 43 is fixedly mounted on the bottom middle end of the carrier plate 42, the bottom ends of the carrier plate 42 are fixedly mounted with the second side plate 44, the second side plate 44 and the fixing block 43 are rotatably connected with the second screw rod 45 through a bearing, the second slider 46 is threadedly connected to the second screw rod 45, the second guide rod 47 is fixedly mounted between the second side plate 44 and the fixing block 43, and the second slider 46 is slidably connected to the second guide rod 47. The second servo motor 48 is fixedly mounted on the second side plate 44, and the output shaft of the second servo motor 48 is fixedly connected to the second screw 45. The first copper block 49 is fixedly mounted on the bottom of the fixed block 43. The first electric heating tube 491 is fixedly mounted in the first copper block 49. Both ends of the first copper block 49 are fixedly mounted with the first copper bar 492. The second copper block 493 is fixedly mounted on the bottom of the second slider 46. The second electric heating tube 494 is fixedly mounted in the second copper block 493. The second copper bar 495 is fixedly mounted on the side of the second copper block 493 facing the first copper block 49.

[0070] A vacuum sealing method for a soft-pack lithium battery comprises the following specific steps:

[0071] Step 1: The height of the carrier plate 42 is adjusted by the third cylinder 41, and the length of the clamping plate is adjusted by the second cylinder 34 until the height of the carrier plate 42 and the length of the clamping plate match the size of the soft-pack lithium battery;

[0072] Step 2: Place the battery cell that has been filled with liquid and has been at rest between the two sets of clamps, and make the air bag opening between the first copper strip 492 and the second copper strip 495. Then, the two sets of clamps are moved toward each other through the cooperation of the first cylinder 21 and the first servo motor 27, so that the battery cell can be fixed. During this process, the air in the sealing box 10 is extracted through the vacuum pump connected to the pipeline 11.

[0073] Step 3: The second copper block 493 is moved toward the first copper block 49 by the second servo motor 48 until the first copper strip 492 and the second copper strip 495 squeeze the air bag opening. During this process, the first copper strip 492 and the second copper strip 495 are heated by the first electric heating tube 491 and the second electric heating tube 494, so that the air bag opening can be heat-sealed.

[0074] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A vacuum sealing device for a soft-pack lithium battery, comprising a sealing box (10), a pipe (11) having a valve fixedly mounted on the side wall of the sealing box (10), characterized in that: Also includes: A clamping assembly for clamping a plurality of groups of soft-pack lithium batteries, wherein the clamping assembly is arranged on the bottom end of the sealing box (10); A sealing assembly is used for sealing a plurality of groups of soft-pack lithium batteries, and the sealing assembly is arranged on the top of a sealing box (10).

2. A vacuum sealing device for soft-pack lithium batteries according to claim 1, characterized in that: The clamping assembly comprises: A first box body (20), the first box body (20) being fixedly mounted on both sides of the bottom end of the sealed box (10); A first cylinder (21), wherein the first cylinder (21) is fixedly installed in the first box body (20), and a clamping plate is provided on the piston rod of the first cylinder (21).

3. A vacuum sealing device for soft-pack lithium batteries according to claim 2, characterized in that: The clamping assembly also includes: A first side plate (22), the first side plates (22) being fixedly mounted on both sides of the bottom end of the sealing box (10); A first screw rod (23), the first screw rod (23) being rotatably connected between the two sets of first side plates (22) via a bearing, and the thread directions of the two ends of the first screw rod (23) are arranged to be opposite from the middle; A first sliding block (24), both ends of the first screw rod (23) being threadedly connected to the first sliding block (24); A first L-shaped rod (25), the first L-shaped rod (25) is fixedly mounted on the top of the first sliding block (24), and a clamping plate is provided at the top end of the first L-shaped rod (25); A first guide rod (26), wherein the first guide rod (26) is fixedly mounted between the two sets of first side plates (22), and the first slider (24) is slidably connected to the first guide rod (26); A first servo motor (27), wherein the first servo motor (27) is fixedly mounted on a set of first side plates (22), and an output shaft of the first servo motor (27) is fixedly connected to the first screw rod (23).

4. A vacuum sealing device for soft-pack lithium batteries according to claim 3, characterized in that: The splint comprises: A first square plate (30), on which the piston rod of the first cylinder (21) and the top end of the first L-shaped rod (25) are both fixedly mounted; A first notch (31), wherein both ends of the first square plate (30) are provided with a first notch (31); A second square plate (32), wherein the second square plate (32) is slidably connected in the first notch (31).

5. A vacuum sealing device for soft-pack lithium batteries according to claim 4, characterized in that: The splint also includes: A first connecting plate (33), the first connecting plate (33) being fixedly mounted on both ends of the first square plate (30); A second cylinder (34), the second cylinder (34) being fixedly mounted on the first connecting plate (33); A second connecting plate (35), the second connecting plate (35) is fixedly mounted on the second square plate (32), and the piston rod of the second cylinder (34) is fixedly mounted on the second connecting plate (35).

6. A vacuum sealing device for soft-pack lithium batteries according to claim 1, characterized in that: The sealing component comprises: A second box body (40), the second box body (40) is fixedly mounted on the top of the sealed box (10); A third cylinder (41), wherein the third cylinder (41) is fixedly installed in the second box body (40); A bearing plate (42), the piston rod of the third cylinder (41) is fixedly mounted on the bearing plate (42).

7. A vacuum sealing device for soft-pack lithium batteries according to claim 6, characterized in that: The sealing component also includes: A fixing block (43), wherein the fixing block (43) is fixedly mounted on the bottom middle end of the bearing plate (42); A second side plate (44), the second side plates (44) being fixedly mounted at both ends of the bottom of the bearing plate (42); A second screw rod (45), wherein the second side plate (44) and the fixing block (43) are rotatably connected to the second screw rod (45) via a bearing; A second slider (46), the second slider (46) being threadedly connected to the second screw rod (45); A second guide rod (47), the second guide rod (47) is fixedly installed between the second side plate (44) and the fixing block (43), and the second sliding block (46) is slidably connected to the second guide rod (47); A second servo motor (48), wherein the second servo motor (48) is fixedly mounted on the second side plate (44), and an output shaft of the second servo motor (48) is fixedly connected to the second screw rod (45).

8. A vacuum sealing device for soft-pack lithium batteries according to claim 7, characterized in that: The sealing component also includes: A first copper block (49), the first copper block (49) being fixedly mounted on the bottom of the fixed block (43); A first electric heating tube (491), wherein the first electric heating tube (491) is fixedly installed in the first copper block (49); A first copper bar (492), the first copper bar (492) is fixedly mounted on both ends of the first copper block (49).

9. A vacuum sealing device for soft-pack lithium batteries according to claim 8, characterized in that: The sealing component also includes: A second copper block (493), the second copper block (493) being fixedly mounted on the bottom of the second sliding block (46); A second electric heating tube (494), wherein the second electric heating tube (494) is fixedly installed in the second copper block (493); The second copper bar (495) is fixedly mounted on one side of the second copper block (493) facing the first copper block (49).

10. A vacuum sealing method for a soft-pack lithium battery, characterized in that: The specific steps are as follows: Step 1: adjusting the height of the carrier plate (42) by means of the third cylinder (41), and adjusting the length of the clamping plate by means of the second cylinder (34), until the height of the carrier plate (42) and the length of the clamping plate match the size of the soft-pack lithium battery; Step 2: Place the battery cell that has been filled with liquid and has been at rest between two sets of clamps, and make the air bag opening between the first copper bar (492) and the second copper bar (495). Then, the two sets of clamps are moved toward each other through the cooperation of the first cylinder (21) and the first servo motor (27), so that the battery cell can be fixed. During this process, the air in the sealing box (10) is extracted through a vacuum pump connected to the pipeline (11); Step 3: The second copper block (493) is moved toward the first copper block (49) by the second servo motor (48) until the first copper strip (492) and the second copper strip (495) squeeze the air bag opening. During this process, the first copper strip (492) and the second copper strip (495) are heated by the first electric heating tube (491) and the second electric heating tube (494), so that the air bag opening can be heat-sealed.

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