CN211045587U

CN211045587U - Electrolyte injection device

Info

Publication number: CN211045587U
Application number: CN201922066328.4U
Authority: CN
Inventors: 薛瑄武; 赵玉玲
Original assignee: Nantong Ruida Electronic Material Co ltd
Current assignee: Nantong Ruida Electronic Material Co ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-07-17
Anticipated expiration: 2029-11-26

Abstract

The utility model provides an electrolyte injection device, including the injection seal box, the electrolyte tank, annotate the fluid reservoir, the metal sheet, annotate the liquid slot and a plurality of notes liquid cup, the metal sheet is located in the injection seal box, the electrolyte tank is the confined jar body with annotating the fluid reservoir, be connected with the feed pipe between electrolyte tank and the notes liquid jar, be equipped with first charge pump and first valve on the feed pipe, the side of annotating the fluid reservoir is equipped with the liquid outlet, the one end of annotating the liquid slot is equipped with the electrolyte import that extends the injection seal box outside, through the hose connection between liquid outlet and the electrolyte interface, be equipped with the second valve on the hose, be equipped with first breather pipe on the top cap of annotating the fluid reservoir, the lower. The utility model discloses be equipped with the liquid cup of annotating that a plurality of volumes are the same on the metal sheet, at first pour into the electrolyte of design volume into to a plurality of liquid cups of annotating, then inject, can guarantee that the electrolyte volume injection of every lithium cell is unanimous, guarantees the accurate of battery capacity.

Description

Electrolyte injection device

Technical Field

The utility model relates to an electrolyte processing equipment technical field, concretely relates to electrolyte injection device.

Background

Lithium batteries are batteries which use lithium metal or lithium alloy as a negative electrode material and use non-aqueous electrolyte solution, and because the chemical characteristics of the lithium metal are very active, the requirements on the environment for processing, storing and using the lithium metal are very high, and with the development of scientific technology, the lithium batteries become mainstream at present, and the lithium batteries can be roughly divided into two types: lithium metal batteries and lithium ion batteries. The electrolyte is an important component of the lithium ion battery, and the liquid injection is an important process for injecting a certain amount of electrolyte into the lithium ion battery and is a very important link in the production process of the lithium ion battery. The quality of the electrolyte of each lithium battery needs to be consistent, and the electrolyte injection amount is large, so that the battery is easy to bulge, and potential safety hazards are caused; when the amount of electrolyte is small, the battery capacity and the cycle performance are deteriorated.

The current liquid injection process also has the following problems: in the liquid injection process, the contact time of the electrolyte and air is too long, the electrolyte effect is influenced, and impurities are easily mixed in the electrolyte.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an electrolyte injection device, it is low to have solved current notes liquid technology work efficiency, and it is inhomogeneous once to annotate the liquid volume, and the contact time of electrolyte and air can not the problem of overlength.

In order to solve the technical problem, an embodiment of the utility model provides an electrolyte injection device, including injection seal box, electrolyte tank, notes liquid jar, metal sheet, notes liquid slot and a plurality of notes liquid cup, the metal sheet is located in the injection seal box, the roof of injection seal box is the transparent plate, it sets up on the metal sheet to annotate the liquid slot, on the metal sheet, the both sides of notes liquid slot are equipped with a plurality of notes liquid cups respectively, the upper portion of each notes liquid cup is through locating overflow launder on the metal sheet and annotating the liquid slot intercommunication, the lower extreme of annotating the liquid cup is connected with the injection nozzle stub that extends to the bottom plate below of injection seal box;

The electrolyte tank and the liquid injection tank are both closed tank bodies, a liquid supply pipe is connected between the electrolyte tank and the liquid injection tank, a first electric pump and a first valve are arranged on the liquid supply pipe, a liquid outlet is arranged on the side of the liquid injection tank, an electrolyte inlet extending to the outer side of the injection sealing box is arranged at one end of the liquid injection groove, the liquid outlet is connected with an electrolyte interface through a hose, a second valve is arranged on the hose, the other end of the liquid injection groove is connected with an electrolyte return opening extending to the outer side of the injection sealing box, a liquid return pipe is connected at the electrolyte return opening, and a third valve is arranged on the liquid return pipe;

Be equipped with first breather pipe on the top cap of notes fluid reservoir, the lower extreme of first breather pipe extends to annotate the fluid reservoir in, is located to annotate and is equipped with fourth valve and fourth joint on the first breather pipe in the fluid reservoir outside.

The top cover of the electrolyte tank is connected with a second vent pipe, the lower end of the second vent pipe is arranged in the electrolyte tank, and a fifth valve and a fifth joint are arranged on the second vent pipe positioned on the outer side of the electrolyte tank;

And a liquid return port is arranged on the top cover of the electrolyte tank, and one end of the liquid return pipe is connected with the liquid return port.

The top cap of electrolyte tank is equipped with the pipette, the one end of pipette extends in the electrolyte tank, the other end of pipette is connected with the imbibition row strip, the imbibition row strip has the inner chamber, be equipped with a plurality of imbibition holes with the inner chamber intercommunication on the imbibition row strip, it is a plurality of the imbibition hole can be pegged graft with a plurality of injection nozzle stub one-to-one.

Wherein, a filter membrane is also arranged on the liquid supply pipe.

The stainless steel gasket is arranged in the liquid injection cup and is an annular gasket, and the outer diameter of the stainless steel gasket is the same as the inner diameter of the liquid injection cup.

The utility model discloses an above-mentioned technical scheme's beneficial effect as follows:

1. The utility model discloses be equipped with the liquid cup of annotating that a plurality of volumes are the same on the metal sheet, at first pour into the electrolyte of design volume into to a plurality of liquid cups of annotating, then inject, can guarantee that the electrolyte volume injection of every lithium cell is unanimous, guarantees the accurate of battery capacity.

2. The utility model discloses annotate the liquid in-process, electrolyte and air contactless avoid mixing into impurity in the electrolyte, bring the potential safety hazard.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is an enlarged view of a top view of a metal plate according to a first embodiment;

FIG. 3 is an enlarged view of a cross-sectional view of a metal plate according to one embodiment;

FIG. 4 is an enlarged view of the structure at A in FIG. 1;

Fig. 5 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 6 is an enlarged view of a cross-sectional view of a second embodiment of the present invention;

Fig. 7 is an enlarged view of a schematic structural diagram of a liquid injection cup in the third embodiment of the present invention.

Description of reference numerals:

1. An injection seal box; 2. an electrolyte tank; 3. injecting a liquid tank; 4. a metal plate; 5. a liquid injection groove; 6. a liquid injection cup; 7. an overflow trough; 8. injecting short pipes; 9. a liquid supply tube; 10. a first electric pump; 11. a first valve; 12. an electrolyte inlet; 13. a hose; 14. a second valve; 15. returning the electrolyte; 16. a liquid return pipe; 17. a third valve; 18. a first vent pipe; 19. a fourth valve; 20. a fourth joint; 21. a second vent pipe; 22. a fifth valve; 23. a fifth joint; 24. filtering the membrane; 25. a pipette; 26. liquid absorbing row bars; 260. a liquid suction hole; 27. a stainless steel gasket.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

Example 1

As shown in fig. 1-3, the embodiment of the utility model provides an electrolyte injection device, including injection seal box 1, electrolyte tank 2, annotate liquid jar 3, metal sheet 4, annotate liquid slot 5 and a plurality of notes liquid cup 6, metal sheet 4 is located in injection seal box 1, the roof of injection seal box 1 is the transparent plate, annotate liquid slot 5 and offer on metal sheet 4, the both sides of annotating liquid slot 5 are equipped with a plurality of notes liquid cups 6 respectively, each annotate overflow launder 7 and annotate liquid slot 5 intercommunication on the upper portion of liquid cup 6 through locating on metal sheet 4, the lower extreme of annotating liquid cup 6 is connected with the injection nozzle stub 8 (as shown in fig. 4) that extends to the bottom plate below of injection seal box 1, and injection nozzle stub 8 department sets up the check valve.

The electrolyte tank 2 and the liquid injection tank 3 are both closed tank bodies, a liquid supply pipe 9 is connected between the electrolyte tank 2 and the liquid injection tank 3, and a first electric pump 10, a first valve 11 and a filter membrane 24 are arranged on the liquid supply pipe 9.

Annotate the side of fluid reservoir 3 and be equipped with the liquid outlet, the one end of annotating liquid slot 5 is equipped with the electrolyte import 12 that extends the 1 outside of injection seal box, connect through hose 13 between liquid outlet and the electrolyte interface 12, be equipped with second valve 14 on the hose 13, the other end of annotating liquid slot 5 is connected with the electrolyte that extends the 1 outside of injection seal box and returns a mouthful 15, electrolyte returns a mouthful 15 department and is connected with back liquid pipe 16, be equipped with third valve 17 on returning liquid pipe 16. And a liquid return port is arranged on the top cover of the electrolyte tank 2, and one end of the liquid return pipe 16 is connected with the liquid return port.

A first vent pipe 18 is arranged on the top cover of the liquid injection tank 3, the lower end of the first vent pipe 18 extends into the liquid injection tank 3, and a fourth valve 19 and a fourth joint 20 are arranged on the first vent pipe 18 positioned outside the liquid injection tank 3.

The working principle of the embodiment is as follows: the fourth joint 20 is connected with a vacuumizing device, the fourth valve 19 is opened, the first valve 11, the second valve 14 and the one-way valve are closed, the interior of the electrolyte injection tank 3 is pumped to be in a negative pressure state, then the fourth valve is closed, the first valve 11 and the first electric pump 10 are opened, the electrolyte in the electrolyte tank 2 is pumped into the electrolyte injection tank 3 through the liquid supply pipe 9, and the pumping amount is 1.1-1.5 times of the amount to be injected. Closing the first electric pump and the first valve, opening the second valve 14, injecting electrolyte into the liquid injection groove 5 through the hose 13, observing that the amount of the electrolyte in each liquid injection cup 6 reaches the designed amount through a transparent top plate of the injection seal box 1 in the injection process, for example, the amount of the electrolyte reaches the through position of the overflow groove 7 and the liquid injection groove 5, then closing the second valve 14, opening the third valve 17, recovering the redundant electrolyte in the liquid injection groove 5 through the liquid return pipe 16, closing the third valve 17 after the recovery of the electrolyte is completed, opening the one-way valve below each liquid injection cup 6, and injecting the electrolyte.

Example 2

As shown in fig. 5 and 6, a second vent pipe 21 is connected to the top cover of the electrolyte tank 2, the lower end of the second vent pipe 21 is disposed in the electrolyte tank 1, and a fifth valve 22 and a fifth joint 23 are disposed on the second vent pipe 21 located outside the electrolyte tank 2.

Be equipped with pipette 25 on the top cap of electrolyte tank 2, the one end of pipette 25 extends in the electrolyte tank 2, the other end of pipette 25 is connected with imbibition row strip 26, is located to be equipped with the sixth valve on the pipette 25 in the electrolyte tank 2 outside, imbibition row strip 26 has the inner chamber, be equipped with a plurality of imbibition holes 260 with the inner chamber intercommunication on the imbibition row strip 26, it is a plurality of imbibition hole 260 can peg graft with a plurality of injection nozzle stub 8 one-to-one.

The working principle of the embodiment is as follows: after the injection is completed, the electrolyte may remain in the injection cup 6, in order to ensure the accuracy of the next injected electrolyte amount, the electrolyte remaining in the injection cup 6 needs to be recovered, at this time, the fifth joint 23 is connected with the vacuumizing device, the fifth valve 22 is opened, the electrolyte tank 2 is pumped into a negative pressure state through the second vent pipe 21, then the fifth valve 22 is closed, the liquid suction hole 260 of the liquid suction bar 26 is correspondingly inserted into the injection short pipe 8, then the check valve and the sixth valve are opened, and the remaining electrolyte is recovered into the electrolyte tank 2 through the negative pressure state of the electrolyte tank 2 and the liquid suction pipe 25.

Example 3

As shown in fig. 7, in the structure of the present embodiment, in addition to the structure of the first embodiment, a stainless steel gasket 27 is provided in the liquid pouring cup, the stainless steel gasket 27 is an annular gasket, the outer diameter of the stainless steel gasket is the same as the inner diameter of the liquid pouring cup, and the stainless steel gasket 27 can be replaced by gaskets with different thicknesses.

The working principle of the embodiment is as follows: when the injection amount of the lithium battery corresponding to some liquid injection cups 6 needs to be adjusted, the adjustment can be carried out by changing the stainless steel gaskets 27 with different thicknesses in the liquid injection cups 6.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An electrolyte injection device is characterized by comprising an injection seal box, an electrolyte tank, an injection tank, a metal plate, an injection groove and a plurality of injection cups, wherein the metal plate is arranged in the injection seal box, a top plate of the injection seal box is a transparent plate, the injection groove is formed in the metal plate, the plurality of injection cups are respectively arranged on the metal plate and on two sides of the injection groove, the upper part of each injection cup is communicated with the injection groove through an overflow groove formed in the metal plate, and the lower end of each injection cup is connected with an injection short pipe extending to the lower part of a bottom plate of the injection seal box;

2. The electrolyte injection device according to claim 1, wherein a second vent pipe is connected to a top cover of the electrolyte tank, the lower end of the second vent pipe is arranged in the electrolyte tank, and a fifth valve and a fifth joint are arranged on the second vent pipe positioned outside the electrolyte tank;

3. The electrolyte injection device according to claim 1 or 2, wherein a top cover of the electrolyte tank is provided with a pipette, one end of the pipette extends into the electrolyte tank, the other end of the pipette is connected with a liquid absorption bar, the liquid absorption bar is provided with an inner cavity, the liquid absorption bar is provided with a plurality of liquid absorption holes communicated with the inner cavity, and the liquid absorption holes can be plugged with the injection short pipes in a one-to-one correspondence manner.

4. The electrolyte injection apparatus of claim 1, wherein the supply tube is further provided with a filter membrane.

5. The electrolyte injection device according to claim 1, wherein a stainless steel gasket is arranged in the liquid injection cup, the stainless steel gasket is an annular gasket, and the outer diameter of the stainless steel gasket is the same as the inner diameter of the liquid injection cup.