Electrolyte injection device

Abstract

The utility model belongs to the technical field of batteries, and discloses an electrolyte injection device. The electrolyte injection device comprises a liquid jacking assembly, a liquid injection pipe and an electrolyte barrel; the liquid jacking assembly comprises a nitrogen cylinder, a gas pipe and a first communicating joint which are connected in sequence; the liquid injection pipe comprises a pipe body and a second communication joint which are connected; the electrolyte barrel comprises a barrel body and a third communication connector arranged on the barrel body, the second communication connector is selectively connected with the first communication connector or the third communication connector, and when an operator observes that no liquid flows out of the other end of the pipe body, it is indicated that residual liquid in the pipe body is completely ejected out; then the second communicating joint is connected with a third communicating joint of an electrolyte barrel filled with a second electrolyte, and normal electrolyte injection is carried out, so that residual liquid in the electrolyte injection pipe can be completely ejected out when two or more electrolytes are switched, the two electrolytes cannot be mixed during electrolyte injection, time or nitrogen cannot be wasted, and the service life of the electrolyte injection pipe is prolonged. And the liquid injection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an electrolyte injection device. Background Art

[0002] The injection tube connected to the injection machine contains the previous electrolyte (hereinafter referred to as the old liquid). When the injection machine is about to use another electrolyte (hereinafter referred to as the new liquid), the new liquid must be used to flush out the old liquid in the injection tube. Specifically, nitrogen is added to the barrel of the new liquid, and pressurized to force the new liquid into the injection tube to push out the old liquid. Usually, the injection tube can be up to 27 meters long. Using nitrogen to push out the old liquid does not allow for determining the time required to completely push out the old liquid. Too long an ejection time will waste electrolyte; too short a time may result in the risk of the old liquid not being completely drained, resulting in the possibility of mixing the new and old electrolytes when injecting the electrolyte, affecting the performance of the battery cell.

[0003] Therefore, it is urgent to design an electrolyte injection device to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide an electrolyte injection device, which can more clearly determine whether the electrolyte in the injection tube is completely filled, avoid wasting electrolyte, avoid the presence of two electrolytes in the injected battery cell, and ensure the performance of the battery cell.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] An electrolyte injection device, comprising:

[0007] A top liquid assembly, comprising a nitrogen bottle, a gas pipe and a first connecting joint connected in sequence;

[0008] The liquid injection tube includes a connected tube body and a second connecting joint, wherein the end of the tube body away from the second connecting joint can be connected to the liquid injection machine;

[0009] The electrolyte barrel comprises a barrel body and a third connecting joint provided on the barrel body. The second connecting joint can be selectively connected to the first connecting joint or the third connecting joint.

[0010] As an optional solution, the electrolyte injection device further includes a buffer barrel, and the end of the tube body facing away from the second connecting joint can be connected to the buffer barrel.

[0011] As an optional solution, the cache bucket is open; or

[0012] The cache bucket is transparent; or

[0013] The cache bucket has a visible window.

[0014] As an optional solution, the cache barrel and the liquid filling machine are detachably connected.

[0015] As an optional solution, the cache barrel and the injection pipe are connected via a quick connector.

[0016] As an optional solution, the first connecting joint and the third connecting joint are both male joints, and the second connecting joint is a female joint; or

[0017] The first connecting joint and the third connecting joint are both female joints, and the second connecting joint is a male joint.

[0018] As an optional solution, one end of the male connector connected to the female connector extends into the female connector and is connected to the female connector.

[0019] As an optional solution, the electrolyte barrel further includes a valve, one end of which is connected to the barrel body, and the other end of which is connected to the pump body.

[0020] As an optional solution, the valve is a manual valve or a solenoid valve.

[0021] As an optional solution, the above nitrogen cylinder includes:

[0022] a bottle body filled with compressed nitrogen;

[0023] A switch and an air outlet, the air outlet is connected to the bottle body, the switch is used to cut off or open the passage between the bottle body and the air outlet, and one end of the air pipe away from the first connecting joint is connected to the air outlet.

[0024] The beneficial effects of the present invention are:

[0025] The utility model provides an electrolyte injection device. Through the arrangement of a second connecting joint, when one electrolyte is used up and needs to be replaced with another electrolyte for injection, the second connecting joint is removed from the third connecting joint and connected to the first connecting joint. 0.5-1 kg of nitrogen is added, and the nitrogen in the nitrogen bottle is directly flushed into the tube body to blow the residual electrolyte in the tube body into the buffer barrel, and then the electrolyte is automatically injected into the battery cell by the injection machine. The operator observes that no liquid flows out from the other end of the tube body, which means that the residual liquid in the tube body has been completely ejected. Then the second connecting joint is connected to the third connecting joint of the electrolyte barrel filled with new liquid, and about 0.05 kg of electrolyte is discharged again. The electrolyte injection device can realize the complete ejection of the residual liquid in the injection tube when two or more electrolytes are switched, ensuring that the two electrolytes will not be mixed during injection, and it is convenient to observe, without wasting time or nitrogen, thereby improving the injection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the connection between the second connection joint and the first connection joint in the electrolyte injection device provided by the embodiment of the present utility model;

[0027] Figure 2 It is a schematic structural diagram of the connection between the second connection joint and the third connection joint in the electrolyte injection device provided by the embodiment of the present utility model;

[0028] Figure 3 It is a schematic structural diagram of the second connection joint provided by the embodiment of the present utility model;

[0029] Figure 4 It is a schematic structural diagram of the first connection joint or the third connection joint provided by the embodiment of the present utility model;

[0030] Figure 5 It is a schematic structural diagram of the nitrogen gas cylinder provided by the embodiment of the present utility model.

[0031] In the figure:

[0032] 10. Top liquid assembly; 11. Nitrogen gas cylinder; 111. Cylinder body; 112. Switch; 113. Gas outlet part; 12. Air pipe; 13. First connection joint;

[0033] 20. Liquid injection pipe; 21. Pipe body; 22. Second connection joint; 221. Liquid flow channel; 23. Quick joint;

[0034] 30. Electrolyte barrel; 31. Barrel body; 32. Third connection joint; 321. Connection end; 33. Valve;

[0035] 50. Buffer barrel; 40. Liquid injection machine platform. Detailed implementation manners

[0036] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that, for the sake of convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.

[0037] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0038] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0040] This embodiment provides an electrolyte injection device that can clearly determine whether the electrolyte in the injection tube 20 is completely clean, thereby avoiding waste of electrolyte and preventing the presence of two electrolytes in the injected battery cell, thereby ensuring the performance of the battery cell. Figure 1 and Figure 2 As shown, the electrolyte injection device includes a liquid top assembly 10, an injection pipe 20 and an electrolyte barrel 30. The liquid top assembly 10 includes a nitrogen cylinder 11, an air pipe 12 and a first connecting joint 13 connected in sequence; the injection pipe 20 includes a connected tube body 21 and a second connecting joint 22, and the end of the tube body 21 away from the second connecting joint 22 can be connected to the injection machine 40; the electrolyte barrel 30 includes a barrel body 31 and a third connecting joint 32 arranged on the barrel body 31, and the second connecting joint 22 can be selectively connected to the first connecting joint 13 or the third connecting joint 32.

[0041] The electrolyte injection device, through the setting of the second connecting joint 22, when one electrolyte is used up and needs to be replaced with another electrolyte for injection (before this, the second connecting joint 22 is connected to the third connecting joint 32 of the electrolyte barrel 30 containing the old electrolyte, that is, Figure 2 ), remove the second connecting joint 22 from the third connecting joint 32 and connect it to the first connecting joint 13 ( Figure 1), add 0.5-1 kg of nitrogen, the nitrogen in the nitrogen bottle 11 directly rushes into the tube body 21, and blows the residual electrolyte in the tube body 21 into the buffer barrel 50, and then the liquid injection machine 40 automatically injects it into the battery cell. The operator observes that no liquid flows out of the other end of the tube body 21, which means that the residual liquid in the tube body 21 has been completely ejected, and then the second connecting joint 22 is connected to the third connecting joint 32 of the electrolyte barrel 30 filled with new liquid, and about 0.5 kg is discharged again. The electrolyte in the pipeline is completely drained and cleaned. The above-mentioned electrolyte injection device can realize the complete ejection of the residual liquid in the injection tube 20 when two or more electrolytes are switched, ensuring that the two electrolytes will not mix during injection, and it is convenient to observe, without wasting time or nitrogen, thereby improving the injection efficiency.

[0042] The liquid injection machine 40 is used to inject liquid into the battery shell. Through the above arrangement, it is more convenient to inject liquid into the battery shell. The structure of the liquid injection machine 40 is prior art and will not be described in detail here.

[0043] In an optional embodiment, the cache barrel 50 is open, that is, the end of the tube body 21 facing away from the second connecting joint 22 directly extends into the cache barrel 50 from the opening, and the operator can visually observe from the opening whether there is still electrolyte flowing out of the second connecting joint 22.

[0044] In an optional embodiment, the buffer barrel 50 is transparent, and the operator can observe from the outside whether electrolyte is still flowing out of the second connecting joint 22.

[0045] In an optional embodiment, the buffer barrel 50 is provided with a viewing window, and the operator can observe through the viewing window whether electrolyte is still flowing out of the second connecting joint 22 .

[0046] Optionally, when the buffer barrel 50 is transparent or has a viewing window, the buffer barrel 50 is detachably connected to the injection tube 20. With the above arrangement, when changing different electrolytes, different buffer barrels 50 can be used to prevent different electrolytes from mixing in the buffer barrel 50.

[0047] Optionally, the cache barrel 50 and the injection tube 20 are connected via a quick connector 23, which can increase the speed of replacing the cache barrel 50.

[0048] Optionally, the cache barrel 50 is detachably connected to the liquid injection machine 40. Through the above arrangement, when caching is not required, the end of the tube body 21 away from the second connecting joint 22 can be directly connected to the liquid injection machine 40.

[0049] Alternatively, as Figures 2 - 4As shown, the first connecting joint 13 and the third connecting joint 32 are both male joints, and the second connecting joint 22 is a female joint. With the above arrangement, the female joint is provided at the liquid injection pipe 20, so that the electrolyte remaining in the cavity of the female joint is also ejected by the nitrogen gas, avoiding the remaining electrolyte in the second connecting joint 22.

[0050] Optionally, one end of the male joint connected to the female joint extends into the female joint and is connected to the female joint. It can be understood that, as Figure 3 shown, the second connecting joint 22 is provided with a liquid flow channel 221. As Figure 4 shown, the connecting end 321 of the male joint (the first connecting joint 13 or the third connecting joint 32) is inserted into the liquid flow channel 221 to be connected to the second connecting joint 22. When nitrogen gas enters the female joint from the male joint, the gas has no obstruction and is more likely to carry away the remaining electrolyte. Similarly, the electrolyte also has no obstruction and less remains.

[0051] In other embodiments, the first connecting joint 13 and the third connecting joint 32 are both female joints, and the second connecting joint 22 is a male joint, which can also achieve quick switching connection, and is not limited herein.

[0052] Optionally, the male joint and the female joint can be snap-connected, thread-connected, etc., and are not limited herein.

[0053] Optionally, the quick joint 23 can also refer to the connection method of the male joint and the female joint, which will not be elaborated herein.

[0054] Optionally, the electrolyte bucket 30 further includes a valve 33. One end of the valve 33 is connected to the bucket body 31, and the other end is connected to the pump body. With the above arrangement, when the valve 33 is connected to the first connecting joint 13, the pump body is simultaneously connected to the valve 33, and the new liquid is pumped into the liquid injection pipe 20 by the pump body for normal liquid injection operation.

[0055] It should be noted that when the new liquid is just introduced, a part of the outflowing electrolyte can be discarded first, preferably 500 g. With this setting, it is ensured that the next outflowing liquid is pure new liquid, preventing a small amount of old liquid from remaining in the liquid injection pipe 20 after being ejected by the nitrogen gas.

[0056] Optionally, the valve 33 is a manual valve or a solenoid valve.

[0057] Optionally, as Figure 5 shown, the nitrogen cylinder 11 includes a cylinder body 111, a switch 112 and an air outlet part 113. The cylinder body 111 is filled with compressed nitrogen; the air outlet part 113 is connected to the cylinder body 111, and the switch 112 is used to cut off or open the passage between the cylinder body 111 and the air outlet part 113. One end of the air pipe 12 away from the first connecting joint 13 is connected to the air outlet part 113. With the above arrangement, the switch 112 can better control the on-off of the nitrogen gas.

[0058] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. Electrolyte injection device, characterized in that, include: A liquid top assembly (10) comprises a nitrogen bottle (11), an air pipe (12) and a first connecting joint (13) connected in sequence; A liquid injection pipe (20) comprises a connected pipe body (21) and a second connecting joint (22), wherein an end of the pipe body (21) facing away from the second connecting joint (22) is capable of being connected to a liquid injection machine (40); The electrolyte barrel (30) comprises a barrel body (31) and a third connecting joint (32) arranged on the barrel body (31); the second connecting joint (22) can be selectively connected to the first connecting joint (13) or the third connecting joint (32).

2. The electrolyte injection device according to claim 1, wherein The electrolyte injection device further comprises a buffer barrel (50), and one end of the tube body (21) facing away from the second connecting joint (22) can be connected to the buffer barrel (50).

3. The electrolyte injection device according to claim 2, wherein The cache bucket (50) is open; or The cache bucket (50) is transparent; or The cache bucket (50) opens a visual window.

4. The electrolyte injection device according to claim 2, characterized in that, The buffer barrel (50) and the liquid injection machine (40) are detachably connected.

5. The electrolyte injection device according to claim 2, characterized in that, The buffer barrel (50) and the liquid injection pipe (20) are connected via a quick connector (23).

6. The electrolyte injection device according to any one of claims 1-5, characterized in that The first connecting joint (13) and the third connecting joint (32) are both male joints, and the second connecting joint (22) is a female joint; or The first connecting joint (13) and the third connecting joint (32) are both female joints, and the second connecting joint (22) is a male joint.

7. The electrolyte injection device according to claim 6, wherein, One end of the male connector connected to the female connector extends into the female connector and is connected to the female connector.

8. The electrolyte injection device according to any one of claims 1-5, characterized in that, The electrolyte barrel (30) further comprises a valve (33), one end of which is connected to the barrel body (31) and the other end of which is connected to the pump body.

9. The electrolyte injection device according to claim 8, characterized in that, The valve (33) is a manual valve or a solenoid valve.

10. The electrolyte injection device according to any one of claims 1-3, characterized in that, The nitrogen bottle (11) comprises: a bottle (111) filled with compressed nitrogen; A switch (112) and an air outlet (113), wherein the air outlet (113) is connected to the bottle body (111), and the switch (112) is used to cut off or open the passage between the bottle body (111) and the air outlet (113), and an end of the air pipe (12) facing away from the first connecting joint (13) is connected to the air outlet (113).

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