CN220358294U

CN220358294U - Electrolyte injection device

Info

Publication number: CN220358294U
Application number: CN202321983200.4U
Authority: CN
Inventors: 尹旭; 黄向峰; 冯玉川; 李峥; 何泓材
Original assignee: Suzhou Qingtao New Energy S&T Co Ltd
Current assignee: Suzhou Qingtao New Energy S&T Co Ltd
Priority date: 2023-07-26
Filing date: 2023-07-26
Publication date: 2024-01-16
Anticipated expiration: 2033-07-26

Abstract

The utility model relates to the technical field of lithium battery production, in particular to an electrolyte injection device. The electrolyte injection device comprises a bubble removing component, a heating component, a driving component and an injection joint, wherein the input end of the bubble removing component is respectively communicated with an external liquid storage device and an external vacuumizing device, electrolyte can be injected into the bubble removing component from the external liquid storage device, the external vacuumizing device can enable the inside of the bubble removing component to be kept in a negative pressure state, the bubble removing component can stir electrolyte in the negative pressure state, the heating component is communicated with the output end of the bubble removing component, the heating component can heat electrolyte after the bubble removing is completed, the input end of the driving component is communicated with the heating component, the output end of the driving component is communicated with the input end of the injection joint, the output end of the injection joint is in butt joint with an injection hole of a battery, and the driving component can inject the electrolyte after the heating is completed to the internal quantity of the battery. The bubble removal efficiency of the electrolyte is improved, and the liquid injection efficiency and the infiltration effect of the electrolyte are further improved.

Description

Electrolyte injection device

Technical Field

The utility model relates to the technical field of lithium battery production, in particular to an electrolyte injection device.

Background

The electrolyte in the lithium ion battery plays a role in infiltrating the battery core and transmitting lithium ions. In the production process of the lithium ion battery, an important process in the whole production process of the electrolyte injection process directly influences the performance of the battery. In the process of injecting the electrolyte, the electrolyte is injected into the battery from the outside and then gradually flows into the gaps among the pole piece, the diaphragm pore and the layers, and the gas contained in the gaps is discharged, so that the infiltration of the battery core is realized.

In the prior art, bubbles often exist in the electrolyte, so that in order to improve the infiltration effect of the electrolyte, a vacuumizing device is generally arranged to perform multiple vacuumizing operations on the inside of the battery so as to realize the injection of the electrolyte. The liquid injection mode has long vacuumizing time and influences the liquid injection efficiency of the electrolyte. In addition, in the process of injecting the electrolyte into the battery from the external liquid storage device, the temperature of the electrolyte is difficult to ensure, so that the viscosity of the electrolyte fluctuates, and the effect of infiltration of the electrolyte is greatly influenced.

Therefore, there is a need for an electrolyte injection device that solves the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide an electrolyte injection device so as to improve the bubble removal rate of electrolyte and the infiltration effect and the injection rate of the electrolyte.

To achieve the purpose, the utility model adopts the following technical scheme:

an electrolyte injection device comprising:

the input end of the bubble removing assembly is respectively communicated with an external liquid storage device and an external vacuumizing device, electrolyte can be injected into the bubble removing assembly from the external liquid storage device, the external vacuumizing device can enable the interior of the bubble removing assembly to be kept in a negative pressure state, and the bubble removing assembly can stir the electrolyte in the negative pressure state;

the heating component is communicated with the output end of the bubble removal component and can heat the electrolyte after the bubbles are removed;

the electrolyte injection device comprises a driving assembly and a liquid injection connector, wherein the input end of the driving assembly is communicated with the heating assembly, the output end of the driving assembly is communicated with the input end of the liquid injection connector, the output end of the liquid injection connector is in butt joint with a liquid injection hole of a battery, and the driving assembly can quantitatively inject the heated electrolyte into the battery.

Preferably, the bubble removal assembly comprises:

the electrolyte is contained in the inner cavity of the containing shell; and

the stirring assembly is rotationally arranged in the inner cavity of the accommodating shell, and can rotate relative to the accommodating shell.

Preferably, the electrolyte injection device further comprises:

one end of the liquid inlet pipeline is communicated with the input end of the bubble removal assembly, the other end of the liquid inlet pipeline is communicated with the output end of the external liquid storage device, and the electrolyte can be injected into the bubble removal assembly along the liquid inlet pipeline; and

the vacuum device comprises an air outlet pipeline, wherein one end of the air outlet pipeline is communicated with the input end of the bubble removal assembly and is not interfered with the liquid inlet pipeline, the other end of the air outlet pipeline is communicated with the vacuum device, and the vacuum device can be used for pumping air in the bubble removal assembly along the air outlet pipeline.

Preferably, the heating assembly includes:

a support housing;

the support shell is sleeved on the periphery of the heating inner container, the electrolyte after the bubble removal operation is contained in the heating inner container, and the heating inner container has heat conductivity; and

the heating wire is wound on the periphery of the heating inner container and is positioned in the inner cavity of the supporting shell, and the heating wire can heat the heating inner container.

Preferably, the heating assembly further comprises:

the temperature detector can detect the temperature of the electrolyte in the heating liner in real time; and

the first controller is connected with the temperature detector and the heating wire harness, and can control the opening and closing of the heating wire according to the detection information of the temperature detector.

Preferably, the driving assembly includes:

a driving member for driving the electrolyte, which completes the heating operation, to be injected into the battery;

a meter capable of measuring in real time the mass of electrolyte injected into the battery; and

and the second controller is connected with the meter and the driving piece wire harness and can control the opening and closing of the driving piece according to the metering information of the meter.

Preferably, the electrolyte injection device further comprises:

the infusion pipeline is used for respectively connecting the output end of the bubble removal assembly with the input end of the heating assembly, the output end of the heating assembly with the input end of the driving assembly and the output end of the driving assembly with the output end of the liquid injection joint.

As a preferable scheme, the infusion pipeline is further provided with a control switch, and the control switch can respectively control the conduction and the separation between the output end of the bubble removing component and the input end of the heating component, the output end of the heating component and the input end of the driving component, and the output end of the driving component and the output end of the liquid injection joint.

Preferably, the liquid injection joint is a liquid injection nozzle or a liquid injection needle.

Preferably, the heating assembly is capable of heating the electrolyte solution for which the bubble removal operation is completed to 25-60 ℃.

The utility model has the beneficial effects that:

according to the electrolyte injection device provided by the utility model, the input end of the bubble removal assembly is respectively communicated with the external liquid storage device and the external vacuumizing device, so that electrolyte can be injected into the bubble removal assembly from the external liquid storage device, the internal part of the bubble removal assembly is kept in a negative pressure state by utilizing the external vacuumizing device, the vacuumizing bubble removal of the electrolyte is realized, the bubble removal assembly can stir the electrolyte in the negative pressure state, the vacuumizing bubble removal efficiency of the electrolyte is further improved, and the injection efficiency and the infiltration effect of the electrolyte are further improved; through setting up with remove the heating element that bubble subassembly output switches on mutually, can be with accomplishing the electrolyte after removing the bubble and heat to suitable temperature, combine driving assembly and annotate the liquid joint and will accomplish in the electrolyte injection battery after the heating, further improve electrolyte annotate liquid efficiency and immersion fluid effect. In addition, the drive assembly can be used for quantitatively injecting the electrolyte into the battery, so that excessive or insufficient injection of the electrolyte into the battery can be avoided.

Drawings

FIG. 1 is a schematic view of an electrolyte injection device according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a bubble removal module according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a portion of a heating assembly according to an embodiment of the present utility model;

fig. 4 is a schematic cross-sectional view of a heating assembly provided in an embodiment of the present utility model.

In the figure:

1. a bubble removal assembly; 11. an accommodating case; 12. a stirring assembly; 13. an input end; 14. an output end;

2. a heating assembly; 21. a temperature detector; 22. heating the inner container; 23. a support housing; 24. a heating wire; 25. a motor; 26. a connecting rod; 27. a pulp board;

3. a drive assembly;

4. a liquid injection joint;

5. an infusion tube;

6. a liquid inlet pipe;

7. an air outlet pipe;

8. and a battery.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

In order to solve the above problems, as shown in fig. 1, an embodiment of the present utility model provides an electrolyte injection device. The electrolyte injection device comprises a bubble removal assembly 1, a heating assembly 2, a driving assembly 3 and an injection joint 4, wherein an input end 13 of the bubble removal assembly 1 is respectively communicated with an external liquid storage device and an external vacuumizing device, electrolyte can be injected into the bubble removal assembly 1 from the external liquid storage device, the external vacuumizing device can enable the inside of the bubble removal assembly 1 to keep a negative pressure state, the bubble removal assembly 1 can stir electrolyte in the negative pressure state, the heating assembly 2 is communicated with an output end 14 of the bubble removal assembly 1, the heating assembly 2 can heat electrolyte after bubble removal is completed, an input end of the driving assembly 3 is communicated with the heating assembly 2, an output end of the driving assembly 3 is communicated with an input end of the injection joint 4, an output end of the injection joint 4 is in butt joint with an injection hole of a battery 8, and the driving assembly 3 can quantitatively inject the electrolyte after the heating into the battery 8.

According to the electrolyte injection device, the input end 13 of the bubble removal assembly 1 is respectively communicated with the external liquid storage device and the external vacuumizing device, so that electrolyte can be injected into the bubble removal assembly 1 from the external liquid storage device, the internal part of the bubble removal assembly 1 is kept in a negative pressure state by utilizing the external vacuumizing device, vacuumizing and bubble removal of the electrolyte are realized, the bubble removal assembly 1 can stir the electrolyte in the negative pressure state, the vacuumizing and bubble removal efficiency of the electrolyte is further improved, and the injection efficiency and the infiltration effect of the electrolyte are further improved; through setting up with remove heating element 2 that bubble subassembly 1 output 14 switches on mutually, can be with accomplishing the electrolyte after removing the bubble and heat to suitable temperature, combine driving element 3 and annotate liquid joint 4 and will accomplish in the electrolyte injection battery 8 after the heating, further improve electrolyte annotate liquid efficiency and immersion fluid effect. In addition, the dosing of the drive assembly 3 into the battery 8 also avoids over-or under-dosing of the electrolyte into the battery 8.

Preferably, the electrolyte injection device further comprises an infusion tube 5, wherein the infusion tube 5 connects the output end 14 of the bubble removal module 1 with the input end of the heating module 2, the output end of the heating module 2 with the input end of the driving module 3, and the output end of the driving module 3 with the output end of the injection joint 4, respectively. Through setting up infusion pipeline 5 can guarantee that electrolyte removes sealed transmission between bubble subassembly 1, heating element 2, drive assembly 3 and annotate liquid joint 4, avoid the electrolyte to reveal, improve the protection to the electrolyte.

Further, a control switch (not shown in the figure) is further disposed on the infusion tube 5, and the control switch can respectively control the connection and disconnection between the output end 14 of the bubble removal assembly 1 and the input end of the heating assembly 2, the output end of the heating assembly 2 and the input end of the driving assembly 3, and the output end of the driving assembly 3 and the output end of the liquid injection joint 4. Specifically, in this embodiment, a first control switch is disposed on the infusion tube 5 between the output end of the bubble removal assembly 1 and the input end of the heating assembly 2, a second control switch is disposed on the infusion tube 5 between the output end of the heating assembly 2 and the input end of the driving assembly 3, a third control switch is disposed on the infusion tube 5 between the output end of the driving assembly 3 and the output end of the liquid injection joint 4, and the first control switch, the second control switch and the third control switch work independently and can control the flow rate of the electrolyte, so that the effect of adjusting the rate of electrolyte injection can be achieved by adjusting the conduction and the separation of the first control switch, the second control switch and the third control switch when the electrolyte injection operation is performed.

Preferably, the electrolyte injection device further comprises a liquid inlet pipeline 6 and an air outlet pipeline 7, wherein one end of the liquid inlet pipeline 6 is communicated with the input end 13 of the bubble removal assembly 1, the other end of the liquid inlet pipeline 6 is communicated with the output end of the external liquid storage device, electrolyte can be injected into the bubble removal assembly 1 along the liquid inlet pipeline 6, one end of the air outlet pipeline 7 is communicated with the input end 13 of the bubble removal assembly 1 and is not interfered with the liquid inlet pipeline 6, the other end of the air outlet pipeline 7 is communicated with the vacuumizing device, and the vacuumizing device can suck air in the bubble removal assembly 1 along the air outlet pipeline 7.

Similarly, a liquid inlet switch is arranged on the liquid inlet pipeline 6, a gas outlet switch is arranged on the gas outlet pipeline 7, and when electrolyte is required to be input into the bubble removal assembly 1, the liquid inlet switch is turned on and the gas outlet switch is turned off, so that the electrolyte is injected into the bubble removal assembly 1 from the inner side of the external liquid storage device along the liquid inlet pipeline 6; when the electrolyte in the bubble removal assembly 1 needs to be subjected to bubble removal operation, the liquid inlet switch is closed, the air outlet switch is opened, and the external vacuumizing device can suck air in the bubble removal assembly 1 along the air outlet pipeline 7. Specifically, the vacuumizing device can vacuumize the air pressure in the foam removing assembly 1 to minus 10Kpa to minus 99Kpa, in the embodiment, the vacuumizing device can vacuumize the air pressure in the foam removing assembly 1 to minus 50Kpa, and the air pressure value of minus 50Kpa can reduce the vacuumizing requirement on the vacuumizing device while guaranteeing the vacuumizing and foam removing effects, so that the price of the vacuumizing device is reduced.

In the embodiment, the vacuumizing device is a vacuum pump, and the vacuum pump has the advantages of compact structure, small volume, light weight, low noise, small vibration and the like, and is widely applied to various vacuum process scenes. In other embodiments, the vacuum-pumping device may be a vacuum generator, and the embodiment is not specifically limited. The specific structure and working principle of the vacuum pump belong to the prior art, and are not described in detail here.

Further, as shown in fig. 2, the bubble removal assembly 1 includes a housing shell 11 and a stirring assembly 12, wherein the electrolyte is contained in an inner cavity of the housing shell 11, the stirring assembly 12 is rotatably disposed in the inner cavity of the housing shell 11, and the stirring assembly 12 can rotate relative to the housing shell 11. When the electrolyte in the negative pressure state is required to be stirred, the stirring assembly 12 can rotate relative to the accommodating shell 11, so that the electrolyte accommodated in the accommodating shell 11 is driven to rotate relative to the accommodating shell 11, and the bubble removal efficiency of the electrolyte is improved. The stirring assembly 12 in this embodiment includes a stirring driving device, and further includes one or a combination of a stirring rod, an anchor stirring paddle, a paddle stirring paddle, and a frame stirring paddle, which are arranged in layers along the length extending direction of the stirring shaft when used in combination. It is to be understood that the stirring assembly 12 is known in the art, and a person skilled in the art can select the stirring assembly according to actual needs, which is not described herein.

Preferably, the heating assembly 2 is capable of heating the electrolyte for which the de-bubbling operation is completed to 25-60 ℃. If the temperature of the electrolyte is too low, the viscosity of the electrolyte is high, so that the electrolyte injection efficiency is low and the infiltration time is long; if the temperature of the electrolyte is too high, the electrolyte is liable to be volatilized and decomposed, resulting in poor impregnation effect of the electrolyte. In this embodiment, the heating element 2 is capable of heating the electrolyte solution after the bubble removal operation to 45 ℃, and in other embodiments, the heating element 2 may also heat the electrolyte solution to any temperature within 25 ℃ to 60 ℃, which is not particularly limited.

Specifically, as shown in fig. 3 and 4, the heating assembly 2 includes a support housing 23, a heating liner 22, and a heating wire 24, wherein the support housing 23 is sleeved on the outer periphery of the heating liner 22, the electrolyte after the bubble removal operation is accommodated in the heating liner 22, the heating liner 22 has thermal conductivity, the heating wire 24 is wound on the outer periphery of the heating liner 22 and is located in the inner cavity of the support housing 23, and the heating wire 24 can heat the heating liner 22. When the electrolyte in the heating liner 22 needs to be heated, the heating wire 24 is started, so that the heating wire 24 heats the heating liner 22, and the electrolyte in the heating liner 22 is heated by utilizing the heat transfer principle. In this embodiment, the heating liner 22 is made of stainless steel, and in other embodiments, the heating liner 22 may be made of other materials having thermal conductivity, which is not limited in this embodiment. In other embodiments, the heating wire 24 may be provided as a heating pipe, a heating body for heating liquid, or the like, and the present embodiment is not particularly limited. In addition, in other embodiments, the specific structure of the heating assembly 2 may be adaptively adjusted according to real-time requirements, for example, the heating assembly 2 may also heat the electrolyte after the bubble removal operation by water bath heating or the like, which is not limited in this embodiment.

Preferably, one end of the infusion tube 5 penetrates the side walls of the support housing 23 and the heating inner container 22 to realize a connection structure of the infusion tube 5 and the input end of the heating assembly 2. And the port of the infusion tube 5 is flush with the inner side wall surface of the heating inner container 22 so that the electrolyte flowing from the infusion tube 5 into the heating inner container 22 can flow down along the inner surface of the heating inner container 22. The heating wire 24 heats the liner body of the heating liner 22, so that the electrolyte on the inner side wall of the heating liner 22 can be heated by heat conduction of the heating liner 22, thereby being beneficial to improving the heating rate of the electrolyte.

Further, the heating assembly 2 further comprises a motor 25, a connecting rod 26 and a paddle 27. Wherein, motor 25 sets up on the top of supporting shell 23, and connecting rod 26 rotates along vertical direction to be connected on heating inner bag 22 inner top wall and inner bottom wall, and the output shaft of motor 25 runs through supporting shell 23 and links firmly with the top of connecting rod 26. The pulp sheet 27 is provided with a plurality of pulp sheets, and one end of the pulp sheet 27 is fixedly connected to the connecting rod 26. When the motor 25 drives the connecting rod 26 to rotate around the axis thereof, the slurry plate 27 is driven to rotate so as to stir the electrolyte in the heating inner container 22, thereby being beneficial to uniformly heating the electrolyte and improving the heating rate of the electrolyte.

Further, the heating assembly 2 further includes a temperature detector 21 and a first controller (not shown in the figure), wherein the temperature detector 21 can detect the temperature of the electrolyte in the heating inner container 22 in real time, the first controller is connected with the temperature detector 21 and the heating wire 24 in a wire harness, and the first controller can control the opening and closing of the heating wire 24 according to the detection information of the temperature detector 21. When the temperature detector 21 detects that the temperature of the electrolyte in the heating inner container 22 is lower than the preset temperature, the first controller can control the heating wire 24 to start according to the detected temperature of the temperature detector 21, and the heating wire 24 is used for heating the electrolyte in the heating inner container 22; when the temperature detector 21 detects that the temperature of the electrolyte in the heating inner container 22 reaches the preset temperature, the first controller can control the heating wire 24 to be closed according to the detected temperature of the temperature detector 21, so that the heating wire 24 is prevented from heating the electrolyte to an excessive temperature.

In this embodiment, the temperature detector 21 is a temperature sensor, and the temperature sensor has a simple structure, is convenient to detect, and has a preset temperature of 45 ℃. In other embodiments, the temperature detector 21 may be other temperature measuring structures, the preset temperature may be adjusted within 25 ℃ to 60 ℃, the specific structure and the detection principle of the temperature sensor are not specifically limited in this embodiment, and are not described in detail herein.

Preferably, the driving assembly 3 includes a driving member (not shown in the drawing), a meter (not shown in the drawing), and a second controller (not shown in the drawing), wherein the driving member is used for driving the electrolyte injected into the battery 8 after the heating operation is completed, the meter is capable of measuring the mass of the electrolyte injected into the battery 8 in real time, the second controller is connected with the meter and the driving member harness, and the second controller is capable of controlling the opening and closing of the driving member according to the measuring information of the meter. When the meter detects that the mass of the electrolyte injected into the battery 8 reaches a preset value, the second controller can control the driving piece to be closed according to the metering information of the meter, so that the situation that the electrolyte is excessively injected into the battery 8 or the electrolyte is insufficiently injected into the battery 8 is avoided.

In this embodiment, the driving member is a circulation pump, and the circulation pump injects the electrolyte after the heating operation into the battery 8.

Preferably, the priming tab 4 is a priming nozzle or a priming needle. The liquid injection nozzle or the liquid injection joint has simple structure and good liquid injection effect.

Preferably, the priming tab 4 has a heating function. In order to prevent the electrolyte heated by the heating assembly 2 from influencing the injection through heat dissipation in the process of conveying the electrolyte to the injection joint 4 through the infusion pipeline 5, the infusion joint 4 is arranged as a heatable injection joint, so that the electrolyte can be secondarily heated, and the electrolyte can be ensured to be at a required temperature when being injected into the battery 8. Optionally, in other implementations, a pumping assembly (not shown in the drawing) may be disposed between the liquid injection joint 4 and the heating assembly 2, where the pumping assembly is used to pump the electrolyte in the infusion tube 5 between the heating assembly 2 and the liquid injection joint 4 back to the heating assembly 2, so as to avoid heat dissipation caused by long-time residence of the heated electrolyte in the infusion tube 5.

In order to further improve the electrolyte injection effect into the battery 8 and the protection of the battery 8, in this embodiment, the electrolyte injection hole in the battery 8 to be injected is a stepped hole with gradually reduced hole diameter from top to bottom, and the stepped hole with gradually reduced hole diameter from top to bottom can collect the leaked electrolyte in the electrolyte injection process, so that the electrolyte is prevented from leaking to the outside of the battery 8 to corrode the battery 8, and the protection of the battery 8 is improved.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. An electrolyte injection device, comprising:

the bubble removing assembly (1), an input end (13) of the bubble removing assembly (1) is respectively communicated with an external liquid storage device and an external vacuumizing device, electrolyte can be injected into the bubble removing assembly (1) from the external liquid storage device, the external vacuumizing device can enable the interior of the bubble removing assembly (1) to be kept in a negative pressure state, and the bubble removing assembly (1) can stir the electrolyte in the negative pressure state;

the heating component (2) is communicated with the output end (14) of the bubble removal component (1), and the heating component (2) can heat the electrolyte after the bubbles are removed;

the electrolyte injection device comprises a driving assembly (3) and a liquid injection joint (4), wherein the input end of the driving assembly (3) is communicated with the heating assembly (2), the output end of the driving assembly (3) is communicated with the input end of the liquid injection joint (4), the output end of the liquid injection joint (4) is in butt joint with a liquid injection hole of a battery (8), and the driving assembly (3) can quantitatively inject the electrolyte after heating into the battery (8).

2. Electrolyte priming device according to claim 1, characterized in that the de-bubbling assembly (1) comprises:

a containing shell (11), wherein the electrolyte is contained in an inner cavity of the containing shell (11); and

the stirring assembly (12) is rotatably arranged in the inner cavity of the accommodating shell (11), and the stirring assembly (12) can rotate relative to the accommodating shell (11).

3. The electrolyte injection apparatus of claim 1, further comprising:

a liquid inlet pipeline (6), wherein one end of the liquid inlet pipeline (6) is communicated with the input end (13) of the bubble removal assembly (1), the other end of the liquid inlet pipeline (6) is communicated with the output end of the external liquid storage device, and the electrolyte can be injected into the bubble removal assembly (1) along the liquid inlet pipeline (6); and

the device comprises an air outlet pipeline (7), wherein one end of the air outlet pipeline (7) is communicated with the input end (13) of the bubble removal assembly (1) and is not interfered with the liquid inlet pipeline (6), the other end of the air outlet pipeline (7) is communicated with the vacuumizing device, and the vacuumizing device can suck air in the bubble removal assembly (1) out of the air outlet pipeline (7).

4. Electrolyte injection device according to claim 1, characterized in that the heating assembly (2) comprises:

a support housing (23);

the support shell (23) is sleeved on the periphery of the heating inner container (22), the electrolyte after the bubble removal operation is contained in the heating inner container (22), and the heating inner container (22) has heat conductivity; and

and the heating wire (24) is wound on the periphery of the heating inner container (22) and is positioned in the inner cavity of the supporting shell (23), and the heating wire (24) can heat the heating inner container (22).

5. Electrolyte injection device according to claim 4, wherein the heating assembly (2) further comprises:

a temperature detector (21), the temperature detector (21) being capable of detecting in real time the temperature of the electrolyte in the heating liner (22); and

and the first controller is connected with the temperature detector (21) and the heating wire (24) in a wire harness mode, and can control the opening and closing of the heating wire (24) according to detection information of the temperature detector (21).

6. Electrolyte injection device according to claim 1, characterized in that the drive assembly (3) comprises:

a driving member for driving the electrolyte, which completes the heating operation, to be injected into the battery (8);

a meter capable of metering in real time the mass of electrolyte injected into the battery (8); and

7. The electrolyte injection apparatus of claim 1, further comprising:

the infusion pipeline (5), infusion pipeline (5) will remove bubble subassembly (1) output (14) with the input of heating element (2), the output of heating element (2) with the input of drive assembly (3) and the output of drive assembly (3) with annotate the output that liquid connects (4) and link to each other respectively.

8. Electrolyte injection device according to claim 7, characterized in that the infusion tube (5) is further provided with a control switch, which is capable of controlling the connection and disconnection between the output end (14) of the bubble removal assembly (1) and the input end of the heating assembly (2), the output end of the heating assembly (2) and the input end of the driving assembly (3), and the output end of the driving assembly (3) and the output end of the injection joint (4), respectively.

9. Electrolyte injection device according to claim 1, characterized in that the injection joint (4) is an injection nozzle or an injection needle.

10. Electrolyte injection device according to claim 1, characterized in that the heating assembly (2) is capable of heating the electrolyte for which the de-bubbling operation is completed to 25-60 ℃.