Lithium ion battery liquid injection device

Abstract

The utility model discloses a lithium ion battery liquid injection device which comprises a supporting table, a first transverse plate, a second transverse plate, a plurality of liquid storage tanks, a plurality of liquid injection nozzles and a plurality of liquid injection plates, liquid injection pipes are arranged on the liquid storage tanks, one ends of the liquid injection pipes are connected with the liquid injection nozzles, the first transverse plate and the second transverse plate are respectively arranged on the supporting table, and the first transverse plate and the second transverse plate are arranged on the supporting table. The liquid storage tank is arranged on the first transverse plate in a sliding mode, and the liquid injection plate is arranged on the second transverse plate in a sliding mode. The two L-shaped pressing plates are arranged on the supporting table in a spaced mode and abut against the top end face of the liquid storage tank; the fixing device is arranged on the supporting table and used for fixing the multiple moved liquid injection plates. According to the liquid injection device, the distance between the liquid storage tanks and the liquid injection nozzles can be adjusted, and the distance between the liquid storage tanks and the bottom plate and the distance between the liquid injection nozzles and the bottom plate can be adjusted, so that liquid injection can be performed on battery cells with different sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a liquid injection device for lithium ion batteries. Background Art

[0002] During the battery production process, it is necessary to inject liquid into the battery cells. The existing liquid injection machine is provided with a plurality of liquid storage tanks and liquid injection nozzles connected thereto. After the liquid injection nozzles are abutted against the liquid injection holes of the battery cells, the whole liquid injection machine is placed into a vacuum cabinet, and the vacuum in the vacuum cabinet is cyclically pumped to gradually inject the electrolyte into the battery cells to achieve liquid injection. The interval between adjacent liquid injection nozzles of this liquid injection machine cannot be adjusted, and the adjustment distance in the height of the liquid injection nozzles is short, so that the applicable battery cell sizes are limited and it is impossible to adapt to larger or smaller sized battery cells, which has deficiencies. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the above technical problems and provide a liquid injection device for lithium ion batteries.

[0004] The technical solution of the utility model: A liquid injection device for lithium ion batteries, including a support platform, a first cross plate, a second cross plate, and a plurality of liquid storage tanks, liquid injection nozzles and liquid injection plates with the same quantity. A liquid injection pipe is provided on the liquid storage tank, one end of the liquid injection pipe is connected to the liquid injection nozzle, the support platform is respectively provided with the first cross plate and the second cross plate, the liquid storage tank is slidably arranged on the first cross plate, and the liquid injection plate is slidably arranged on the second cross plate; further including:

[0005] Two L-shaped pressing plates are arranged on the support platform at intervals and abut against the top end faces of the liquid storage tanks;

[0006] A fixing device is arranged on the support platform for fixing a plurality of moved liquid injection plates.

[0007] Preferably, the first cross plate is arranged above the second cross plate.

[0008] Preferably, the pressing plate is detachably connected to the support platform.

[0009] Preferably, the first cross plate is provided with a sliding groove and a first through groove communicating with the sliding groove, the liquid storage tank can slide in the sliding groove, and one end of the liquid injection pipe passes through the first through groove and is connected to the liquid injection nozzle.

[0010] Preferably, the second cross plate is provided with a second through groove, the liquid injection plate is provided with a T-shaped rod, and the T-shaped rod is adapted to the second through groove so that the liquid injection plate can slide on the second cross plate.

[0011] Preferably, one end of the liquid injection plate is provided with a first rack; the fixing device includes a clamping plate detachably connected to the support platform, and a second rack adapted to the first rack is provided on one side of the clamping plate.

[0012] Preferably, the support platform includes a bottom plate, two upper support plates, two lower support plates and a plurality of guide rods connecting the bottom plate and the support plates. Both the first cross plate and the second cross plate are arranged on the two lower support plates; a lifting device is further included for driving the lower support plates to slide on the lower support plates.

[0013] Preferably, the lifting device includes two screws and two round plates. One end of each screw is rotatably connected to the lower support plate through the round plate, and the screws are screwed to the upper support plates.

[0014] The beneficial effects of the present utility model are as follows: in the present utility model, the distances between a plurality of liquid storage tanks and liquid injection nozzles can be adjusted, and the distances between the plurality of liquid storage tanks and liquid injection nozzles and the bottom plate can be adjusted, so as to inject liquid into electric cores of different sizes. Description of the Drawings

[0015] Figure 1 is a top view of the overall structure of the preferred embodiment of the present utility model;

[0016] Figure 2 is a side view of the overall structure of the preferred embodiment of the present utility model;

[0017] Figure 3 is a top view of the connection between the first cross plate and the liquid storage tank in the preferred embodiment of the present utility model;

[0018] Figure 4 is a schematic diagram of the clamping plate in the preferred embodiment of the present utility model;

[0019] Figure 5 is a schematic diagram of the T-shaped rod in the preferred embodiment of the present utility model;

[0020] Figure 6 is a schematic diagram of the connection between the screw and the round plate in the preferred embodiment of the present utility model.

[0021] Reference numerals: support platform 10, bottom plate 101, upper support plate 102, lower support plate 103, guide rod 104, first cross plate 2, chute 201, first through groove 202, second cross plate 3, second through groove 301, liquid storage tank 4, liquid injection pipe 401, liquid injection nozzle 5, liquid injection plate 6, T-shaped rod 601, pressing plate 7, clamping plate 8, screw 9, round plate 11. Detailed Description of the Invention

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] Referring to Figures 1 to 6 , a lithium-ion battery liquid injection device includes a support table 10, a first cross plate 2, a second cross plate 3, and a plurality of liquid storage tanks 4, liquid injection nozzles 5, and liquid injection plates 6. A liquid injection pipe 401 is provided on the liquid storage tank 4. One end of the liquid injection pipe 401 is connected to the liquid injection nozzle 5. The support table 10 is respectively provided with the first cross plate 2 and the second cross plate 3. The liquid storage tank 4 is slidably arranged on the first cross plate 2, and the liquid injection plate 6 is slidably arranged on the second cross plate 3; further includes:

[0024] Two L-shaped pressing plates 7 are arranged on the support table 10 at intervals and are in contact with the top end face of the liquid storage tank 4;

[0025] A fixing device is arranged on the support table 10 for fixing the plurality of moved liquid injection plates 6. In the present utility model, an unfilled battery cell is placed on the support table 10, and the liquid injection hole of the battery cell is in contact with the liquid injection nozzle 5. The electrolyte is poured into the liquid storage tank 4, and the whole liquid injection machine is placed in a vacuum cabinet. The vacuum cabinet circulates and evacuates the air, so that the inside of the battery cell is evacuated, and the electrolyte can flow into the battery cell. When injecting liquid into battery cells of the same height but different sizes, a plurality of liquid storage tanks 4 and a plurality of liquid injection plates 6 are respectively moved to make the distance between the liquid storage tanks 4 larger or smaller, and the distance between the liquid injection plates 6 larger or smaller, so as to make the distance between the liquid injection nozzles 5 larger or smaller. The fixing device fixes the moved liquid injection plate 6. Since the liquid storage tank 4 and the liquid injection nozzle 5 are connected by the liquid injection pipe 401, the liquid storage tank 4 will not move after the liquid injection nozzle 5 is fixed, realizing liquid injection for battery cells of different sizes and improving the practicability of the liquid injection machine.

[0026] As a preferred embodiment of the present utility model, it may further have the following additional technical features:

[0027] In this embodiment, the first cross plate 2 is arranged above the second cross plate 3, which is convenient for the electrolyte to flow out.

[0028] In this embodiment, the pressing plate 7 is detachably connected to the support table 10. After the liquid storage tank 4 is placed in the chute 201, the pressing plate 7 is installed, which is convenient for installation. Specifically, an ear plate is provided on one side of the pressing plate 7, and a bolt passes through the ear plate and is connected to the upper support plate 102.

[0029] In this embodiment, a sliding groove 201 and a first through groove 202 communicating with the sliding groove 201 are provided on the first cross plate 2. The liquid storage tank 4 can slide in the sliding groove 201. One end of the liquid injection pipe 401 passes through the first through groove 202 and is connected to the liquid injection nozzle 5. When the distance between the liquid storage tanks 4 needs to be adjusted, the liquid storage tank 4 can slide in the sliding groove 201, and the pressing plate 7 functions to prevent the liquid storage tank 4 from disengaging from the sliding groove 201.

[0030] In this embodiment, a second through groove 301 is provided on the second cross plate 3. A T-shaped rod 601 is provided on the liquid injection plate 6. The T-shaped rod 601 is adapted to the second through groove 301 so that the liquid injection plate 6 can slide on the second cross plate 3. When the distance between the liquid injection plates 6 needs to be adjusted, the liquid injection plate 6 slides on the second cross plate 3 through the T-shaped rod 601.

[0031] In this embodiment, a first rack is provided at one end of the liquid injection plate 6; the fixing device includes a clamping plate 8, which is detachably connected to the support platform 10. A second rack adapted to the first rack is provided on one side of the clamping plate 8. When the distance between the liquid storage tank 4 and the liquid injection plate 6 needs to be adjusted, the clamping plate 8 is removed, and the liquid storage tank 4 and the liquid injection plate 6 are moved to adjust the distance. After adjustment, the clamping plate 8 is installed to abut against one end of the liquid injection plate 6, thereby fixing it to prevent it from moving. Specifically, L-shaped connecting plates are provided at both ends of the clamping plate 8, and the connecting plates can slide on the lower support plate 103 and are fixed by bolts.

[0032] In this embodiment, the support platform 10 includes a bottom plate 101, two upper support plates 102, two lower support plates 103, and a plurality of guide rods 104. The guide rods 104 connect the bottom plate 101 and the support plate 102. The first cross plate 2 and the second cross plate 3 are both arranged on the two lower support plates 103; further included is a lifting device for driving the lower support plate 103 to slide on the lower support plate 103. The lifting device drives the lower support plate 103 to move up and down on the lower support plate 103, so that the distance between the liquid injection nozzle 5 and the bottom plate 101 becomes larger or smaller, and liquid can be injected into electric cores of different heights.

[0033] In this embodiment, the lifting device includes two screws 9 and two round plates 11. One end of each screw 9 is rotatably connected to the lower support plate 103 through the round plate 11, and the screw 9 is screwed to the upper support plate 102. By rotating the screw 9, the lower support plate 103 is driven to move up or down relative to the guide rod 104 to adjust the distance between the liquid injection nozzle 5 and the bottom plate 101.

[0034] It should be noted that the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or apparatus. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

[0035] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium-ion battery liquid injection device, comprising a support platform (10), a first horizontal plate (2), a second horizontal plate (3), and a plurality of liquid storage tanks (4), liquid injection nozzles (5), and liquid injection plates (6). A liquid injection pipe (401) is provided on the liquid storage tank (4), and one end of the liquid injection pipe (401) is connected to the liquid injection nozzle (5). The support platform (10) is respectively provided with a first horizontal plate (2) and a second horizontal plate (3), and is characterized in that, The liquid storage tank (4) is slidably arranged on the first cross plate (2), and the liquid injection plate (6) is slidably arranged on the second cross plate (3); further comprising: Two L-shaped pressing plates (7), which are arranged on the support table (10) at intervals and are in contact with the top end face of the liquid storage tank (4); A fixing device, which is arranged on the support table (10) for fixing a plurality of the moved liquid injection plates (6).

2. The liquid injection device for a lithium-ion battery according to claim 1, characterized in that: The first cross plate (2) is arranged above the second cross plate (3).

3. The liquid injection device for a lithium-ion battery according to claim 1, wherein: The pressing plate (7) is detachably connected to the support table (10).

4. The liquid injection device for a lithium-ion battery according to claim 1, wherein: A chute (201) and a first through groove (202) communicating with the chute (201) are provided on the first cross plate (2). The liquid storage tank (4) can slide in the chute (201), and one end of the liquid injection pipe (401) passes through the first through groove (202) and is connected to the liquid injection nozzle (5).

5. The liquid injection device for a lithium-ion battery according to claim 1, characterized in that: A second through groove (301) is provided on the second cross plate (3), and a T-shaped rod (601) is provided on the liquid injection plate (6). The T-shaped rod (601) is adapted to the second through groove (301) so that the liquid injection plate (6) can slide on the second cross plate (3).

6. The liquid injection device for a lithium-ion battery according to claim 1, wherein: One end of the liquid injection plate (6) is provided with a first rack; the fixing device includes a clamping plate (8), which is detachably connected to the support table (10), and a second rack adapted to the first rack is provided on one side of the clamping plate (8).

7. A lithium-ion battery liquid injection device according to claim 1, characterized in that: The support table (10) includes a bottom plate (101), two upper support plates (102), two lower support plates (103) and a plurality of guide rods (104). The guide rods (104) connect the bottom plate (101) and the support plates (102). The first cross plate (2) and the second cross plate (3) are both arranged on the two lower support plates (103); further comprising a lifting device for driving the lower support plates (103) to slide on the lower support plates (103).

8. A lithium-ion battery liquid injection device according to claim 7, characterized in that: The lifting device includes two screws (9) and two round plates (11). One end of the screw (9) is rotatably connected to the lower support plate (103) through the round plate (11), and the screw (9) is screwed to the upper support plate (102).

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