Double-hole differential pressure liquid injection device for square-shell battery

Abstract

The utility model discloses a square-shell battery double-hole differential pressure liquid injection device which comprises a working platform, and a notch is formed in the top of the working platform in a penetrating manner; the liquid injection jacking moving mechanism is mounted on the upper end face of the working platform and comprises a battery mounting plate, a driving jacking air cylinder is arranged at the bottom of the battery mounting plate, and the jacking air cylinder drives the battery mounting plate to move up and down on the working platform; the liquid injection mechanism is installed on the working platform and located over the liquid injection jacking and moving mechanism, the liquid injection mechanism comprises a liquid collecting tank, and a filling gun right opposite to the filling hole is arranged on the liquid collecting tank; the filling hole and the suction hole are respectively formed in the top cover of the battery, the filling hole is used for filling the electrolyte, and the suction hole is used for sucking air before filling the electrolyte, so that negative pressure is formed in the battery, the battery can suck the electrolyte to a certain extent when the battery is filled, and the electrolyte filling speed of the battery is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery production, and particularly relates to a double-hole differential pressure liquid injection device for square shell batteries. Background Art

[0002] When filling the electrolyte of lithium batteries, the existing filling method takes too long. Most of them use the fluidity of the electrolyte itself to make it flow into the battery. At the same time, the filling amount of the battery cannot be effectively controlled, resulting in electrolyte waste and inconsistent battery performance, which cannot meet the production needs of lithium batteries. Utility Model Content

[0003] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a double-hole differential pressure injection device for square shell batteries.

[0004] The technical solution adopted by the present utility model includes:

[0005] Working platform with slots running through the top;

[0006] A liquid injection lifting and moving mechanism is installed on the end surface of the working platform, which includes a battery mounting plate. A driving lifting cylinder is provided at the bottom of the battery mounting plate, and the lifting cylinder drives the battery mounting plate to move up and down on the working platform;

[0007] A liquid injection mechanism is installed on the working platform and is located directly above the liquid injection lifting and moving mechanism. The liquid injection mechanism includes a liquid collecting tank, and the liquid collecting tank is provided with a filling gun facing the filling hole.

[0008] The compressed air pumping mechanism is installed and connected to the liquid injection mechanism, and comprises a suction pipe, and the suction pipe is directly facing the suction hole.

[0009] As a preferred embodiment of the present invention, a support plate is provided on the top of the working platform, the lifting cylinder is fixedly connected to the lower end face of the working platform, its output end is fixedly connected to the support plate, and the battery mounting plate is slidably connected to the support plate.

[0010] As a preferred embodiment of the present invention, a movable cylinder is provided on one side of the battery mounting plate, the movable cylinder is fixedly connected to the support plate, and its output end is fixedly connected to the battery mounting plate, and the movable cylinder drives the battery mounting plate to move left and right along the length direction of the support plate.

[0011] As a preferred embodiment of the present invention, a plurality of battery mounting seats are formed on the top of the battery mounting plate, and the plurality of battery mounting seats are equidistantly distributed along the length direction of the battery mounting plate.

[0012] As a preferred embodiment of the present invention, the liquid injection mechanism further includes:

[0013] A liquid storage tank, fixedly connected to the top of the liquid collecting tank and communicated with the interior of the liquid collecting tank through a pipeline;

[0014] A filling body, located at the lower end of the liquid collecting tank, wherein the filling body and the interior of the filling body form an integrated structural cavity with the interior of the liquid collecting tank;

[0015] The return body is located at one side of the filling body, and its interior forms an integrated structural cavity with the interior of the liquid collecting tank. A return pipe is provided on the return body.

[0016] As a preferred embodiment of the present invention, one end of the return fluid is communicated with the interior of the return fluid, and the other end is communicated with the liquid storage tank, and a pump body is provided on the return pipe.

[0017] As a preferred embodiment of the present invention, the filling gun is provided with an electrically controlled valve, and the electrically controlled valve is used to control the conduction state between the filling gun and the filling body.

[0018] As a preferred embodiment of the present invention, the suction pipe is fixedly connected to the filling body, the suction pipe is adapted to the suction hole, and a suction interface is provided on the suction pipe, and the suction interface is used to connect to a vacuum pump.

[0019] The beneficial effects of the utility model are:

[0020] The utility model is a double-hole differential pressure liquid filling device for square shell batteries. A filling hole and a suction hole are respectively provided on the top cover of the battery. The filling hole is used for filling the electrolyte, and the suction hole is used for sucking air before filling the electrolyte, so as to form a negative pressure in the battery, so that the battery can suck the electrolyte to a certain extent when filling the battery, thereby improving the speed of filling the battery electrolyte. By arranging the filling body, the storage volume in each filling body is equal to the required filling volume of each battery, so as to ensure that the filling volume of the electrolyte in each battery is consistent. By arranging the liquid filling jacking and moving mechanism, the electrolyte filling of multiple batteries is realized in two groups. When the electrolyte of one group is being filled, the other group is unloading the batteries after the filling is completed and loading the batteries to be filled, thereby effectively improving the production efficiency of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Figure 2 It is a side structural schematic diagram of the utility model;

[0024] Figure 3 This utility model Figure 2 AA direction cross-sectional structural diagram.

[0025] In the figure: 1. Working platform; 2. Liquid injection lifting and moving mechanism; 3. Liquid injection mechanism; 4. Compressed air pumping mechanism; 5. Battery; 11. Notch; 21. Support plate; 22. Battery mounting plate; 23. Battery mounting seat; 24. Lifting cylinder; 25. Moving cylinder; 31. Liquid collecting tank; 32. Liquid storage tank; 33. Filling body; 34. Return pipe; 35. Pump body; 36. Filling gun; 37. Electric control valve; 39. Return fluid; 41. Suction pipe; 42. Suction interface; 51. Filling hole; 52. Suction hole. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for the purpose of explaining the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein can be arranged and designed in a variety of different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0028] The following combination Figure 1-3 The present invention is a dual-hole differential pressure injection device for square-shell batteries, comprising:

[0029] The working platform 1 has a notch 11 extending through the top;

[0030] The liquid injection jacking and moving mechanism 2 is installed on the upper end surface of the working platform 1, which includes a battery mounting plate 22. A driving jacking cylinder 24 is provided at the bottom of the battery mounting plate 22. The jacking cylinder 24 drives the battery mounting plate 22 to move up and down on the working platform 1. The output end of the jacking cylinder 24 can move up and down in the slot 11. The output end of the jacking cylinder 24 is connected to the battery mounting seat 23. The operation of the jacking cylinder 24 drives the battery mounting seat 23 to move up and down on the working platform 1. A battery 5 is placed on the battery mounting plate 22. The jacking cylinder 24 is used to drive the lifting of the battery 5 to realize the filling of the electrolyte into the battery 5;

[0031] The liquid injection mechanism 3 is installed on the working platform 1 and is located directly above the liquid injection lifting mechanism 2. The liquid injection mechanism 3 includes a liquid collecting tank 31. The liquid collecting tank 31 is provided with a filling gun 36 facing the filling hole 51. When the liquid injection lifting mechanism 2 drives the battery 5 to lift, the filling hole 51 in the battery 5 is connected with the filling gun 36 on the liquid collecting tank 31 to realize the filling of the electrolyte into the battery 5.

[0032] The compressed air pumping mechanism 4 is installed and connected to the liquid injection mechanism 3, and includes a suction pipe 41. The suction pipe 41 is opposite to the suction hole 52. Before the electrolyte is filled, the suction pipe 41 is connected to the suction hole 52, and the connection between the filling gun 36 and the liquid collecting tank 31 is blocked. The air inside the battery 5 is extracted to form a negative pressure inside the battery 5. After the filling gun 36 and the liquid collecting tank 31 are connected, the negative pressure inside the battery 5 can quickly suck the electrolyte inside the liquid collecting tank 31 into the battery 5, effectively shortening the time for electrolyte filling.

[0033] Please refer to Figure 2-3 As shown, a support plate 21 is provided on the top of the working platform 1, the lifting cylinder 24 is fixedly connected to the lower end face of the working platform 1, and its output end is fixedly connected to the support plate 21, the battery mounting plate 22 is slidably connected to the support plate 21, the support plate 21 is fixedly connected to the output end of the lifting cylinder 24, and the support plate 21 serves as an installation platform for the battery mounting plate 22, and the sliding connection between the support plate 21 and the battery mounting plate 22 is realized by sliding means such as slide rails and sliders.

[0034] Please refer to Figure 3 As shown, a moving cylinder 25 is provided on one side of the battery mounting plate 22, and the moving cylinder 25 is fixedly connected to the support plate 21, and its output end is fixedly connected to the battery mounting plate 22, and the moving cylinder 25 drives the battery mounting plate 22 to move left and right along the length direction of the support plate 21. Since the support plate 21 and the battery mounting plate 22 are slidably connected, at the same time, the moving cylinder 25 is fixedly arranged on the support plate 21, and the output end of the moving cylinder 25 is fixedly connected to the battery mounting seat 23, so that the working of the moving cylinder 25 drives the battery mounting plate 22 to slide on the support plate 21.

[0035] Please refer to Figure 3As shown, a plurality of battery mounting seats 23 are formed on the top of the battery mounting plate 22, and the plurality of battery mounting seats 23 are equidistantly distributed along the length direction of the battery mounting plate 22. In some embodiments, the number of battery mounting seats 23 can be multiple, and at the same time, the spacing distribution between two battery mounting seats 23 can be adjusted accordingly. In this embodiment, there are eight battery mounting seats 23, each of which can hold a battery 5, and the distance between every two battery mounting seats 23 is equal. When filling the battery 5, there are four filling guns 36 above the battery mounting seat 23 to fill four groups of batteries 5 at the same time. While filling one group of batteries 5, the remaining four can be disassembled and replaced, thereby improving the production efficiency of the battery 5.

[0036] Please refer to Figure 1-3 As shown, the liquid injection mechanism 3 also includes:

[0037] A liquid storage tank 32 is fixedly connected to the top of the liquid collecting tank 31 and communicates with the interior of the liquid collecting tank 31 through a pipeline. The liquid storage tank 32 is connected to the electrolyte delivery pipe to store the electrolyte;

[0038] The filling body 33 is located at the lower end of the liquid collecting tank 31, and its interior forms an integrated structural cavity with the interior of the liquid collecting tank 31; the return body 39 is located on one side of the filling body 33, and its interior forms an integrated structural cavity with the interior of the liquid collecting tank 31. The return body 39 is provided with a return pipe 34. The filling body 33 is used to add electrolyte to the battery 5. By transporting the electrolyte into the liquid collecting tank 31, the electrolyte flows into each filling body 33. The electrolyte flowing into the filling body 33 is the filling amount of each battery 5, and the electrolyte is added to the battery 5 through the filling gun 36.

[0039] Please refer to Figure 1 As shown, one end of the return fluid 39 is connected to the interior of the return fluid 39, and the other end is connected to the liquid storage tank 32. A pump body 35 is provided on the return pipe 34. After the filling body 33 is filled with electrolyte, the pump body 35 is turned on to extract the excess fluid in the collecting tank 31. During the process of the return pipe 34 extracting the electrolyte in the return fluid 39, the excess electrolyte filled in each filling body 33 flows into the return fluid 39, thereby extracting the excess electrolyte, effectively ensuring the consistency of the filling amount of each battery 5.

[0040] Please refer to Figure 2As shown, the filling gun 36 is provided with an electric control valve 37, and the electric control valve 37 is used to control the conduction state between the filling gun 36 and the filling body 33. When the air in the battery 5 is extracted, the filling gun 36 and the sleeve of the filling body 33 are controlled by the electric control valve 37, so that the interior of the battery 5 cannot be connected with the outside world, thereby extracting air from the interior of the battery 5 to form a negative pressure inside the battery 5. After the extraction has lasted for a certain period of time, the electric control valve 37 is opened to allow the electrolyte in the filling body 33 to quickly flow into the battery 5 under the action of the negative pressure, thereby realizing rapid filling of the battery 5.

[0041] Please refer to Figure 2 As shown, the suction pipe 41 is fixedly connected to the filling body 33 , the suction pipe 41 is adapted to the suction hole 52 , and a suction interface 42 is provided on the suction pipe 41 , and the suction interface 42 is used to connect a vacuum pump to achieve negative pressure inside the battery 5 .

[0042] The working principle of this utility model:

[0043] The electrolyte is introduced into the liquid storage tank 32, which is used to store the electrolyte;

[0044] Controlling the conduction between the liquid storage tank 32 and the liquid collecting tank 31 so that the fluid in the liquid storage tank 32 enters the liquid collecting tank 31 and eventually flows into each filling body 33. The filling amount of the liquid collecting tank 31 is greater than the total volume of each filling body 33 to ensure that each filling body 33 is filled with electrolyte. After the electrolyte fills each filling body 33, the pump body 35 is turned on to extract the electrolyte in the return flow 39 and return it to the liquid storage tank 32. During the process of extracting the electrolyte in the return flow 39, the electrolyte in excess of each filling body 33 is extracted and returned to the liquid storage tank 32, so that the electrolyte in each filling body 33 tends to be consistent, that is, the electrolyte in the filling body 33 is the amount required to be filled in each battery 5;

[0045] The lifting cylinder 24 is controlled to work, and the lifting cylinder 24 drives the support plate 21 and the battery mounting plate 22 to move upward synchronously. When the battery mounting plate 22 moves upward, the battery 5 located on the battery mounting seat 23 is brought into contact with the filling gun 36, so that the filling gun 36 is inserted and aligned into the filling hole 51, and the suction pipe 41 is inserted and aligned into the suction hole 52 of the battery 5. At this time, the filling gun 36 and the filling body 33 are still disconnected. One end of the suction pipe 41 is connected to the vacuum pump to extract the battery 5 from the battery 5, so that a negative pressure is formed inside the battery 5;

[0046] The electronically controlled valve 37 is controlled to open, so that the fluid in the filling body 33 is connected to the interior of the battery 5. Under the negative pressure of the battery 5, the electrolyte in the filling body 33 flows quickly into the battery 5, which greatly shortens the time of filling the battery 5.

[0047] After the electrolyte filling is completed, the lifting cylinder 24 controls the battery 5 to move downward to prepare for the filling of another group of batteries 5;

[0048] During the process of filling another group of batteries 5, the batteries 5 that have been filled can be disassembled and replaced with the batteries 5 that need to be filled with electrolyte. When filling another group of batteries 5, the mobile cylinder 25 is controlled to work, so that the mobile cylinder 25 drives the battery mounting plate 22 to move on the support plate 21, so that the batteries 5 face the filling gun 36, and then the above electrolyte filling process is repeated to achieve the filling of another group of batteries 5, forming the filling of one group of batteries 5 and the unloading and loading of another group of batteries 5, thereby improving the production efficiency of battery 5 filling;

[0049] It should be noted that the lifting of the battery 5 can be performed first, and the negative pressure formed inside the battery 5 and the backflow of the electrolyte can be performed simultaneously to shorten the filling time of the battery 5;

[0050] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0051] The above content is merely an example and explanation of the structure of the present utility model. Technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims of this application, they should all fall within the scope of protection of the present utility model.

Claims

1. A dual-hole differential pressure injection device for square-shell batteries, wherein a filling hole and a suction hole are formed on the top of the square-shell battery, characterized in that: include: A working platform (1) having a notch (11) extending through the top; A liquid injection lifting and moving mechanism (2) is installed on the upper end surface of the working platform (1), and includes a battery mounting plate (22). A driving lifting cylinder (24) is provided at the bottom of the battery mounting plate (22). The lifting cylinder (24) drives the battery mounting plate (22) to move up and down on the working platform (1); A liquid injection mechanism (3) is installed on the working platform (1) and is located directly above the liquid injection lifting and moving mechanism (2). The liquid injection mechanism (3) includes a liquid collecting tank (31). The liquid collecting tank (31) is provided with a filling gun (36) facing the filling hole (51). The compressed air pumping mechanism (4) is installed and connected to the liquid injection mechanism (3), and comprises a suction pipe (41), wherein the suction pipe (41) faces the suction hole (52).

2. A dual-hole differential pressure injection device for square-shell batteries according to claim 1, characterized in that: A support plate (21) is provided on the top of the working platform (1); the lifting cylinder (24) is fixedly connected to the lower end surface of the working platform (1); its output end is fixedly connected to the support plate (21); and the battery mounting plate (22) is slidably connected to the support plate (21).

3. The dual-hole differential pressure injection device for square-shell batteries according to claim 2, characterized in that: A movable cylinder (25) is provided on one side of the battery mounting plate (22). The movable cylinder (25) is fixedly connected to the support plate (21), and its output end is fixedly connected to the battery mounting plate (22). The movable cylinder (25) drives the battery mounting plate (22) to move left and right along the length direction of the support plate (21).

4. A dual-hole differential pressure injection device for square-shell batteries according to claim 3, characterized in that: A plurality of battery mounting seats (23) are formed on the top of the battery mounting plate (22), and the plurality of battery mounting seats (23) are distributed at equal intervals along the length direction of the battery mounting plate (22).

5. The double-hole differential pressure injection device for square-shell batteries according to claim 1, characterized in that: The liquid injection mechanism (3) further comprises: A liquid storage tank (32) is fixedly connected to the top of the liquid collecting tank (31) and is in communication with the interior of the liquid collecting tank (31) through a pipeline; A filling body (33) is located at the lower end of the liquid collecting tank (31), and its interior forms an integrated structural cavity with the interior of the liquid collecting tank (31); A return body (39) is located on one side of the filling body (33), and its interior forms an integrated structural cavity with the interior of the liquid collecting tank (31). A return pipe (34) is provided on the return body (39).

6. The dual-hole differential pressure injection device for square-shell batteries according to claim 5, characterized in that: One end of the return fluid (39) is communicated with the interior of the return fluid (39), and the other end is communicated with the liquid storage tank (32). A pump body (35) is provided on the return pipe (34).

7. The dual-hole differential pressure injection device for square-shell batteries according to claim 5, characterized in that: The filling gun (36) is provided with an electric control valve (37), and the electric control valve (37) is used to control the conduction state between the filling gun (36) and the filling body (33).

8. The dual-hole differential pressure injection device for square-shell batteries according to claim 7, characterized in that: The suction pipe (41) is fixedly connected to the filling body (33), the suction pipe (41) is adapted to the suction hole (52), and a suction interface (42) is provided on the suction pipe (41), and the suction interface (42) is used to connect a vacuum pump.

Images